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| <div id="overview"><a href="../../../../../apidocs/org/trafodion/rest/zookeeper/ZkClient.html">View Javadoc</a></div><pre> |
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| <a class="jxr_linenumber" name="1" href="#1">1</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="2" href="#2">2</a> <em class="jxr_javadoccomment">* @@@ START COPYRIGHT @@@</em> |
| <a class="jxr_linenumber" name="3" href="#3">3</a> |
| <a class="jxr_linenumber" name="4" href="#4">4</a> <em class="jxr_javadoccomment">Licensed to the Apache Software Foundation (ASF) under one</em> |
| <a class="jxr_linenumber" name="5" href="#5">5</a> <em class="jxr_javadoccomment">or more contributor license agreements. See the NOTICE file</em> |
| <a class="jxr_linenumber" name="6" href="#6">6</a> <em class="jxr_javadoccomment">distributed with this work for additional information</em> |
| <a class="jxr_linenumber" name="7" href="#7">7</a> <em class="jxr_javadoccomment">regarding copyright ownership. The ASF licenses this file</em> |
| <a class="jxr_linenumber" name="8" href="#8">8</a> <em class="jxr_javadoccomment">to you under the Apache License, Version 2.0 (the</em> |
| <a class="jxr_linenumber" name="9" href="#9">9</a> <em class="jxr_javadoccomment">"License"); you may not use this file except in compliance</em> |
| <a class="jxr_linenumber" name="10" href="#10">10</a> <em class="jxr_javadoccomment">with the License. You may obtain a copy of the License at</em> |
| <a class="jxr_linenumber" name="11" href="#11">11</a> |
| <a class="jxr_linenumber" name="12" href="#12">12</a> <em class="jxr_javadoccomment"> <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em> |
| <a class="jxr_linenumber" name="13" href="#13">13</a> |
| <a class="jxr_linenumber" name="14" href="#14">14</a> <em class="jxr_javadoccomment">Unless required by applicable law or agreed to in writing,</em> |
| <a class="jxr_linenumber" name="15" href="#15">15</a> <em class="jxr_javadoccomment">software distributed under the License is distributed on an</em> |
| <a class="jxr_linenumber" name="16" href="#16">16</a> <em class="jxr_javadoccomment">"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em> |
| <a class="jxr_linenumber" name="17" href="#17">17</a> <em class="jxr_javadoccomment">KIND, either express or implied. See the License for the</em> |
| <a class="jxr_linenumber" name="18" href="#18">18</a> <em class="jxr_javadoccomment">specific language governing permissions and limitations</em> |
| <a class="jxr_linenumber" name="19" href="#19">19</a> <em class="jxr_javadoccomment">under the License.</em> |
| <a class="jxr_linenumber" name="20" href="#20">20</a> |
| <a class="jxr_linenumber" name="21" href="#21">21</a> <em class="jxr_javadoccomment">* @@@ END COPYRIGHT @@@</em> |
| <a class="jxr_linenumber" name="22" href="#22">22</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="23" href="#23">23</a> |
| <a class="jxr_linenumber" name="24" href="#24">24</a> <strong class="jxr_keyword">package</strong> org.trafodion.<strong class="jxr_keyword">rest</strong>.zookeeper; |
| <a class="jxr_linenumber" name="25" href="#25">25</a> |
| <a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.io.*; |
| <a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.CountDownLatch; |
| <a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> java.util.ArrayList; |
| <a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> java.util.List; |
| <a class="jxr_linenumber" name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> java.util.LinkedList; |
| <a class="jxr_linenumber" name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> java.util.Iterator; |
| <a class="jxr_linenumber" name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> java.nio.charset.Charset; |
| <a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.conf.Configuration; |
| <a class="jxr_linenumber" name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.AsyncCallback; |
| <a class="jxr_linenumber" name="35" href="#35">35</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.ZooKeeper; |
| <a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.Watcher; |
| <a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.WatchedEvent; |
| <a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.CreateMode; |
| <a class="jxr_linenumber" name="39" href="#39">39</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.ZooDefs; |
| <a class="jxr_linenumber" name="40" href="#40">40</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.data.Stat; |
| <a class="jxr_linenumber" name="41" href="#41">41</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.KeeperException; |
| <a class="jxr_linenumber" name="42" href="#42">42</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.Op; |
| <a class="jxr_linenumber" name="43" href="#43">43</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.OpResult; |
| <a class="jxr_linenumber" name="44" href="#44">44</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.ZooKeeper.States; |
| <a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.data.ACL; |
| <a class="jxr_linenumber" name="46" href="#46">46</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.proto.CreateRequest; |
| <a class="jxr_linenumber" name="47" href="#47">47</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.proto.SetDataRequest; |
| <a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">import</strong> org.apache.commons.logging.Log; |
| <a class="jxr_linenumber" name="49" href="#49">49</a> <strong class="jxr_keyword">import</strong> org.apache.commons.logging.LogFactory; |
| <a class="jxr_linenumber" name="50" href="#50">50</a> <strong class="jxr_keyword">import</strong> org.trafodion.<strong class="jxr_keyword">rest</strong>.util.RestConfiguration; |
| <a class="jxr_linenumber" name="51" href="#51">51</a> <strong class="jxr_keyword">import</strong> org.trafodion.<strong class="jxr_keyword">rest</strong>.util.RetryCounter; |
| <a class="jxr_linenumber" name="52" href="#52">52</a> <strong class="jxr_keyword">import</strong> org.trafodion.<strong class="jxr_keyword">rest</strong>.util.RetryCounterFactory; |
| <a class="jxr_linenumber" name="53" href="#53">53</a> <strong class="jxr_keyword">import</strong> org.trafodion.<strong class="jxr_keyword">rest</strong>.Constants; |
| <a class="jxr_linenumber" name="54" href="#54">54</a> <strong class="jxr_keyword">import</strong> org.trafodion.<strong class="jxr_keyword">rest</strong>.util.Bytes; |
| <a class="jxr_linenumber" name="55" href="#55">55</a> |
| <a class="jxr_linenumber" name="56" href="#56">56</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/trafodion/rest/zookeeper/ZkClient.html">ZkClient</a> <strong class="jxr_keyword">implements</strong> Watcher { |
| <a class="jxr_linenumber" name="57" href="#57">57</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(ZkClient.<strong class="jxr_keyword">class</strong>.getName()); |
| <a class="jxr_linenumber" name="58" href="#58">58</a> <strong class="jxr_keyword">private</strong> String path; |
| <a class="jxr_linenumber" name="59" href="#59">59</a> <strong class="jxr_keyword">private</strong> List<String> children; |
| <a class="jxr_linenumber" name="60" href="#60">60</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Charset CHARSET = Charset.forName(<span class="jxr_string">"UTF-8"</span>); |
| <a class="jxr_linenumber" name="61" href="#61">61</a> <strong class="jxr_keyword">private</strong> Configuration conf; |
| <a class="jxr_linenumber" name="62" href="#62">62</a> <strong class="jxr_keyword">private</strong> CountDownLatch connectedSignal = <strong class="jxr_keyword">new</strong> CountDownLatch(1); |
| <a class="jxr_linenumber" name="63" href="#63">63</a> <strong class="jxr_keyword">private</strong> String zkServers; |
| <a class="jxr_linenumber" name="64" href="#64">64</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> port; |
| <a class="jxr_linenumber" name="65" href="#65">65</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> sessionTimeout = 0; |
| <a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">private</strong> ZooKeeper zk = <strong class="jxr_keyword">null</strong>; |
| <a class="jxr_linenumber" name="67" href="#67">67</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/rest/util/RetryCounterFactory.html">RetryCounterFactory</a> retryCounterFactory; |
| <a class="jxr_linenumber" name="68" href="#68">68</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> maxRetries = 0; |
| <a class="jxr_linenumber" name="69" href="#69">69</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> retryIntervalMillis = 0; |
| <a class="jxr_linenumber" name="70" href="#70">70</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String identifier = <strong class="jxr_keyword">null</strong>; |
| <a class="jxr_linenumber" name="71" href="#71">71</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> byte[] id = <strong class="jxr_keyword">null</strong>; |
| <a class="jxr_linenumber" name="72" href="#72">72</a> <strong class="jxr_keyword">private</strong> String parentZnode; |
| <a class="jxr_linenumber" name="73" href="#73">73</a> |
| <a class="jxr_linenumber" name="74" href="#74">74</a> <em class="jxr_comment">// The metadata attached to each piece of data has the</em> |
| <a class="jxr_linenumber" name="75" href="#75">75</a> <em class="jxr_comment">// format:</em> |
| <a class="jxr_linenumber" name="76" href="#76">76</a> <em class="jxr_comment">// <magic> 1-byte constant</em> |
| <a class="jxr_linenumber" name="77" href="#77">77</a> <em class="jxr_comment">// <id length> 4-byte big-endian integer (length of next field)</em> |
| <a class="jxr_linenumber" name="78" href="#78">78</a> <em class="jxr_comment">// <id> identifier corresponding uniquely to this process</em> |
| <a class="jxr_linenumber" name="79" href="#79">79</a> <em class="jxr_comment">// It is prepended to the data supplied by the user.</em> |
| <a class="jxr_linenumber" name="80" href="#80">80</a> |
| <a class="jxr_linenumber" name="81" href="#81">81</a> <em class="jxr_comment">// the magic number is to be backward compatible</em> |
| <a class="jxr_linenumber" name="82" href="#82">82</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte MAGIC =(byte) 0XFF; |
| <a class="jxr_linenumber" name="83" href="#83">83</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MAGIC_SIZE = Bytes.SIZEOF_BYTE; |
| <a class="jxr_linenumber" name="84" href="#84">84</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> ID_LENGTH_OFFSET = MAGIC_SIZE; |
| <a class="jxr_linenumber" name="85" href="#85">85</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> ID_LENGTH_SIZE = Bytes.SIZEOF_INT; |
| <a class="jxr_linenumber" name="86" href="#86">86</a> |
| <a class="jxr_linenumber" name="87" href="#87">87</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> init() { |
| <a class="jxr_linenumber" name="88" href="#88">88</a> <strong class="jxr_keyword">this</strong>.parentZnode = conf.get(Constants.ZOOKEEPER_ZNODE_PARENT,Constants.DEFAULT_ZOOKEEPER_ZNODE_PARENT); |
| <a class="jxr_linenumber" name="89" href="#89">89</a> <strong class="jxr_keyword">this</strong>.path = <strong class="jxr_keyword">this</strong>.parentZnode + Constants.DEFAULT_ZOOKEEPER_ZNODE_PARENT; |
| <a class="jxr_linenumber" name="90" href="#90">90</a> <strong class="jxr_keyword">this</strong>.port = conf.getInt(Constants.ZOOKEEPER_CLIENT_PORT, Constants.DEFAULT_ZOOKEEPER_CLIENT_PORT); |
| <a class="jxr_linenumber" name="91" href="#91">91</a> String[] servers = conf.getStrings(Constants.ZOOKEEPER_QUORUM,Constants.LOCALHOST); |
| <a class="jxr_linenumber" name="92" href="#92">92</a> StringBuffer hosts = <strong class="jxr_keyword">new</strong> StringBuffer(); |
| <a class="jxr_linenumber" name="93" href="#93">93</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < servers.length; ++i) { |
| <a class="jxr_linenumber" name="94" href="#94">94</a> <strong class="jxr_keyword">if</strong>(i != 0 ) |
| <a class="jxr_linenumber" name="95" href="#95">95</a> hosts.append(<span class="jxr_string">","</span>); |
| <a class="jxr_linenumber" name="96" href="#96">96</a> hosts.append(servers[i]); |
| <a class="jxr_linenumber" name="97" href="#97">97</a> hosts.append(<span class="jxr_string">":"</span>); |
| <a class="jxr_linenumber" name="98" href="#98">98</a> hosts.append(port); |
| <a class="jxr_linenumber" name="99" href="#99">99</a> } |
| <a class="jxr_linenumber" name="100" href="#100">100</a> <strong class="jxr_keyword">this</strong>.zkServers = hosts.toString(); |
| <a class="jxr_linenumber" name="101" href="#101">101</a> <strong class="jxr_keyword">this</strong>.sessionTimeout = conf.getInt(Constants.ZK_SESSION_TIMEOUT,Constants.DEFAULT_ZK_SESSION_TIMEOUT); |
| <a class="jxr_linenumber" name="102" href="#102">102</a> <strong class="jxr_keyword">this</strong>.maxRetries = conf.getInt(Constants.ZK_RECOVERY_RETRY,Constants.DEFAULT_ZK_RECOVERY_RETRY); |
| <a class="jxr_linenumber" name="103" href="#103">103</a> <strong class="jxr_keyword">this</strong>.retryIntervalMillis = conf.getInt(Constants.ZK_RECOVERY_RETRY_INTERVAL_MILLIS,Constants.DEFAULT_ZK_RECOVERY_RETRY_INTERVAL_MILLIS); |
| <a class="jxr_linenumber" name="104" href="#104">104</a> retryCounterFactory = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/rest/util/RetryCounterFactory.html">RetryCounterFactory</a>(maxRetries, retryIntervalMillis); |
| <a class="jxr_linenumber" name="105" href="#105">105</a> LOG.debug(<span class="jxr_string">"ZooKeeper Servers:"</span> + zkServers + <span class="jxr_string">",SessionTimeout:"</span> + <strong class="jxr_keyword">this</strong>.sessionTimeout + <span class="jxr_string">",MaxRetries:"</span> + maxRetries + <span class="jxr_string">",RetryIntervalMillis:"</span> + retryIntervalMillis); |
| <a class="jxr_linenumber" name="106" href="#106">106</a> } |
| <a class="jxr_linenumber" name="107" href="#107">107</a> |
| <a class="jxr_linenumber" name="108" href="#108">108</a> <strong class="jxr_keyword">public</strong> String getZkQuorum(){ |
| <a class="jxr_linenumber" name="109" href="#109">109</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.zkServers; |
| <a class="jxr_linenumber" name="110" href="#110">110</a> } |
| <a class="jxr_linenumber" name="111" href="#111">111</a> |
| <a class="jxr_linenumber" name="112" href="#112">112</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/trafodion/rest/zookeeper/ZkClient.html">ZkClient</a>() { |
| <a class="jxr_linenumber" name="113" href="#113">113</a> <strong class="jxr_keyword">this</strong>.conf = RestConfiguration.create(); |
| <a class="jxr_linenumber" name="114" href="#114">114</a> init(); |
| <a class="jxr_linenumber" name="115" href="#115">115</a> } |
| <a class="jxr_linenumber" name="116" href="#116">116</a> |
| <a class="jxr_linenumber" name="117" href="#117">117</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/trafodion/rest/zookeeper/ZkClient.html">ZkClient</a>(<strong class="jxr_keyword">int</strong> sessionTimeout,<strong class="jxr_keyword">int</strong> maxRetries,<strong class="jxr_keyword">int</strong> retryIntervalMillis) { |
| <a class="jxr_linenumber" name="118" href="#118">118</a> <strong class="jxr_keyword">this</strong>.conf = RestConfiguration.create(); |
| <a class="jxr_linenumber" name="119" href="#119">119</a> <strong class="jxr_keyword">this</strong>.conf.setInt(Constants.ZK_SESSION_TIMEOUT,sessionTimeout); |
| <a class="jxr_linenumber" name="120" href="#120">120</a> <strong class="jxr_keyword">this</strong>.conf.setInt(Constants.ZK_RECOVERY_RETRY,maxRetries); |
| <a class="jxr_linenumber" name="121" href="#121">121</a> <strong class="jxr_keyword">this</strong>.conf.setInt(Constants.ZK_RECOVERY_RETRY_INTERVAL_MILLIS,retryIntervalMillis); |
| <a class="jxr_linenumber" name="122" href="#122">122</a> init(); |
| <a class="jxr_linenumber" name="123" href="#123">123</a> } |
| <a class="jxr_linenumber" name="124" href="#124">124</a> |
| <a class="jxr_linenumber" name="125" href="#125">125</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/trafodion/rest/zookeeper/ZkClient.html">ZkClient</a>(String zkhost, <strong class="jxr_keyword">int</strong> zkport) { |
| <a class="jxr_linenumber" name="126" href="#126">126</a> <strong class="jxr_keyword">this</strong>.conf = RestConfiguration.create(); |
| <a class="jxr_linenumber" name="127" href="#127">127</a> <strong class="jxr_keyword">this</strong>.conf.setStrings(Constants.ZOOKEEPER_QUORUM,zkhost); |
| <a class="jxr_linenumber" name="128" href="#128">128</a> <strong class="jxr_keyword">this</strong>.conf.setInt(Constants.ZOOKEEPER_CLIENT_PORT, zkport); |
| <a class="jxr_linenumber" name="129" href="#129">129</a> init(); |
| <a class="jxr_linenumber" name="130" href="#130">130</a> } |
| <a class="jxr_linenumber" name="131" href="#131">131</a> |
| <a class="jxr_linenumber" name="132" href="#132">132</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> connect() <strong class="jxr_keyword">throws</strong> IOException, InterruptedException { |
| <a class="jxr_linenumber" name="133" href="#133">133</a> <strong class="jxr_keyword">if</strong>(zk==<strong class="jxr_keyword">null</strong>) { |
| <a class="jxr_linenumber" name="134" href="#134">134</a> <strong class="jxr_keyword">this</strong>.zk = <strong class="jxr_keyword">new</strong> ZooKeeper(zkServers, sessionTimeout, <strong class="jxr_keyword">this</strong>); |
| <a class="jxr_linenumber" name="135" href="#135">135</a> |
| <a class="jxr_linenumber" name="136" href="#136">136</a> <em class="jxr_comment">//wait 3 seconds to connect</em> |
| <a class="jxr_linenumber" name="137" href="#137">137</a> <strong class="jxr_keyword">int</strong> retries=0; |
| <a class="jxr_linenumber" name="138" href="#138">138</a> <strong class="jxr_keyword">while</strong>(<strong class="jxr_keyword">this</strong>.zk.getState() != ZooKeeper.States.CONNECTED) { |
| <a class="jxr_linenumber" name="139" href="#139">139</a> LOG.debug(<span class="jxr_string">"Zookeeper.State="</span> + <strong class="jxr_keyword">this</strong>.zk.getState()); |
| <a class="jxr_linenumber" name="140" href="#140">140</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="141" href="#141">141</a> Thread.sleep(1000L);<em class="jxr_comment">//1 second</em> |
| <a class="jxr_linenumber" name="142" href="#142">142</a> retries++; |
| <a class="jxr_linenumber" name="143" href="#143">143</a> } <strong class="jxr_keyword">catch</strong> (InterruptedException ie) {} |
| <a class="jxr_linenumber" name="144" href="#144">144</a> |
| <a class="jxr_linenumber" name="145" href="#145">145</a> <strong class="jxr_keyword">if</strong>(retries > 3) |
| <a class="jxr_linenumber" name="146" href="#146">146</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="147" href="#147">147</a> } |
| <a class="jxr_linenumber" name="148" href="#148">148</a> |
| <a class="jxr_linenumber" name="149" href="#149">149</a> <strong class="jxr_keyword">if</strong>(<strong class="jxr_keyword">this</strong>.zk.getState() != ZooKeeper.States.CONNECTED) { |
| <a class="jxr_linenumber" name="150" href="#150">150</a> <strong class="jxr_keyword">this</strong>.zk.close(); |
| <a class="jxr_linenumber" name="151" href="#151">151</a> <strong class="jxr_keyword">this</strong>.zk=<strong class="jxr_keyword">null</strong>; |
| <a class="jxr_linenumber" name="152" href="#152">152</a> LOG.error(<span class="jxr_string">"Zookeeper.State ["</span> + <strong class="jxr_keyword">this</strong>.zk.getState() + <span class="jxr_string">"]"</span>); |
| <a class="jxr_linenumber" name="153" href="#153">153</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"Cannot connect to Zookeeper"</span>); |
| <a class="jxr_linenumber" name="154" href="#154">154</a> } |
| <a class="jxr_linenumber" name="155" href="#155">155</a> |
| <a class="jxr_linenumber" name="156" href="#156">156</a> LOG.debug(<span class="jxr_string">"Zookeeper.State="</span> + <strong class="jxr_keyword">this</strong>.zk.getState()); |
| <a class="jxr_linenumber" name="157" href="#157">157</a> connectedSignal.await(); |
| <a class="jxr_linenumber" name="158" href="#158">158</a> } |
| <a class="jxr_linenumber" name="159" href="#159">159</a> } |
| <a class="jxr_linenumber" name="160" href="#160">160</a> |
| <a class="jxr_linenumber" name="161" href="#161">161</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> resetZk() <strong class="jxr_keyword">throws</strong> IOException, InterruptedException { |
| <a class="jxr_linenumber" name="162" href="#162">162</a> zk = <strong class="jxr_keyword">null</strong>; |
| <a class="jxr_linenumber" name="163" href="#163">163</a> } |
| <a class="jxr_linenumber" name="164" href="#164">164</a> |
| <a class="jxr_linenumber" name="165" href="#165">165</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> close() <strong class="jxr_keyword">throws</strong> InterruptedException { |
| <a class="jxr_linenumber" name="166" href="#166">166</a> <strong class="jxr_keyword">if</strong>(zk != <strong class="jxr_keyword">null</strong>) |
| <a class="jxr_linenumber" name="167" href="#167">167</a> zk.close(); |
| <a class="jxr_linenumber" name="168" href="#168">168</a> <strong class="jxr_keyword">this</strong>.sessionTimeout = 0; |
| <a class="jxr_linenumber" name="169" href="#169">169</a> zk = <strong class="jxr_keyword">null</strong>; |
| <a class="jxr_linenumber" name="170" href="#170">170</a> } |
| <a class="jxr_linenumber" name="171" href="#171">171</a> |
| <a class="jxr_linenumber" name="172" href="#172">172</a> <strong class="jxr_keyword">public</strong> ZooKeeper getZk() { |
| <a class="jxr_linenumber" name="173" href="#173">173</a> <strong class="jxr_keyword">return</strong> zk; |
| <a class="jxr_linenumber" name="174" href="#174">174</a> } |
| <a class="jxr_linenumber" name="175" href="#175">175</a> |
| <a class="jxr_linenumber" name="176" href="#176">176</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> process(WatchedEvent event) { |
| <a class="jxr_linenumber" name="177" href="#177">177</a> <strong class="jxr_keyword">if</strong>(event.getState() == Watcher.Event.KeeperState.SyncConnected) { |
| <a class="jxr_linenumber" name="178" href="#178">178</a> connectedSignal.countDown(); |
| <a class="jxr_linenumber" name="179" href="#179">179</a> } |
| <a class="jxr_linenumber" name="180" href="#180">180</a> } |
| <a class="jxr_linenumber" name="181" href="#181">181</a> |
| <a class="jxr_linenumber" name="182" href="#182">182</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> create(String path, String value, <strong class="jxr_keyword">boolean</strong> ephemeral) |
| <a class="jxr_linenumber" name="183" href="#183">183</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="184" href="#184">184</a> Stat stat = zk.exists(path,false); |
| <a class="jxr_linenumber" name="185" href="#185">185</a> <strong class="jxr_keyword">if</strong>(stat==<strong class="jxr_keyword">null</strong>) { |
| <a class="jxr_linenumber" name="186" href="#186">186</a> <strong class="jxr_keyword">if</strong>(ephemeral==<strong class="jxr_keyword">true</strong>) |
| <a class="jxr_linenumber" name="187" href="#187">187</a> zk.create(path,value.getBytes(CHARSET),ZooDefs.Ids.OPEN_ACL_UNSAFE,CreateMode.EPHEMERAL); |
| <a class="jxr_linenumber" name="188" href="#188">188</a> <strong class="jxr_keyword">else</strong> |
| <a class="jxr_linenumber" name="189" href="#189">189</a> zk.create(path,value.getBytes(CHARSET),ZooDefs.Ids.OPEN_ACL_UNSAFE,CreateMode.PERSISTENT); |
| <a class="jxr_linenumber" name="190" href="#190">190</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="191" href="#191">191</a> zk.setData(path,value.getBytes(CHARSET), -1); |
| <a class="jxr_linenumber" name="192" href="#192">192</a> } |
| <a class="jxr_linenumber" name="193" href="#193">193</a> } |
| <a class="jxr_linenumber" name="194" href="#194">194</a> |
| <a class="jxr_linenumber" name="195" href="#195">195</a> <strong class="jxr_keyword">public</strong> String get(String path, Watcher watcher) |
| <a class="jxr_linenumber" name="196" href="#196">196</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="197" href="#197">197</a> byte[] data = zk.getData(path, watcher, <strong class="jxr_keyword">null</strong><em class="jxr_comment">/*<em class="jxr_comment">stat*/</em>);</em> |
| <a class="jxr_linenumber" name="198" href="#198">198</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> String(data, CHARSET); |
| <a class="jxr_linenumber" name="199" href="#199">199</a> } |
| <a class="jxr_linenumber" name="200" href="#200">200</a> |
| <a class="jxr_linenumber" name="201" href="#201">201</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="202" href="#202">202</a> <em class="jxr_javadoccomment"> * delete is an idempotent operation. Retry before throwing exception.</em> |
| <a class="jxr_linenumber" name="203" href="#203">203</a> <em class="jxr_javadoccomment"> * This function will not throw NoNodeException if the path does not</em> |
| <a class="jxr_linenumber" name="204" href="#204">204</a> <em class="jxr_javadoccomment"> * exist.</em> |
| <a class="jxr_linenumber" name="205" href="#205">205</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="206" href="#206">206</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> delete(String path, <strong class="jxr_keyword">int</strong> version) |
| <a class="jxr_linenumber" name="207" href="#207">207</a> <strong class="jxr_keyword">throws</strong> InterruptedException, KeeperException { |
| <a class="jxr_linenumber" name="208" href="#208">208</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="209" href="#209">209</a> <strong class="jxr_keyword">boolean</strong> isRetry = false; <em class="jxr_comment">// False for first attempt, true for all retries.</em> |
| <a class="jxr_linenumber" name="210" href="#210">210</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="211" href="#211">211</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="212" href="#212">212</a> zk.delete(path, version); |
| <a class="jxr_linenumber" name="213" href="#213">213</a> <strong class="jxr_keyword">return</strong>; |
| <a class="jxr_linenumber" name="214" href="#214">214</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="215" href="#215">215</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="216" href="#216">216</a> <strong class="jxr_keyword">case</strong> NONODE: |
| <a class="jxr_linenumber" name="217" href="#217">217</a> <strong class="jxr_keyword">if</strong> (isRetry) { |
| <a class="jxr_linenumber" name="218" href="#218">218</a> LOG.info(<span class="jxr_string">"Node "</span> + path + <span class="jxr_string">" already deleted. Assuming that a "</span> + |
| <a class="jxr_linenumber" name="219" href="#219">219</a> <span class="jxr_string">"previous attempt succeeded."</span>); |
| <a class="jxr_linenumber" name="220" href="#220">220</a> <strong class="jxr_keyword">return</strong>; |
| <a class="jxr_linenumber" name="221" href="#221">221</a> } |
| <a class="jxr_linenumber" name="222" href="#222">222</a> LOG.warn(<span class="jxr_string">"Node "</span> + path + <span class="jxr_string">" already deleted, and this is not a "</span> + |
| <a class="jxr_linenumber" name="223" href="#223">223</a> <span class="jxr_string">"retry"</span>); |
| <a class="jxr_linenumber" name="224" href="#224">224</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="225" href="#225">225</a> |
| <a class="jxr_linenumber" name="226" href="#226">226</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="227" href="#227">227</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="228" href="#228">228</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="229" href="#229">229</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"delete"</span>); |
| <a class="jxr_linenumber" name="230" href="#230">230</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="231" href="#231">231</a> |
| <a class="jxr_linenumber" name="232" href="#232">232</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="233" href="#233">233</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="234" href="#234">234</a> } |
| <a class="jxr_linenumber" name="235" href="#235">235</a> } |
| <a class="jxr_linenumber" name="236" href="#236">236</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="237" href="#237">237</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="238" href="#238">238</a> isRetry = <strong class="jxr_keyword">true</strong>; |
| <a class="jxr_linenumber" name="239" href="#239">239</a> } |
| <a class="jxr_linenumber" name="240" href="#240">240</a> } |
| <a class="jxr_linenumber" name="241" href="#241">241</a> |
| <a class="jxr_linenumber" name="242" href="#242">242</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="243" href="#243">243</a> <em class="jxr_javadoccomment"> * exists is an idempotent operation. Retry before throwing exception</em> |
| <a class="jxr_linenumber" name="244" href="#244">244</a> <em class="jxr_javadoccomment"> * @return A Stat instance</em> |
| <a class="jxr_linenumber" name="245" href="#245">245</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="246" href="#246">246</a> <strong class="jxr_keyword">public</strong> Stat exists(String path, Watcher watcher) |
| <a class="jxr_linenumber" name="247" href="#247">247</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="248" href="#248">248</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="249" href="#249">249</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="250" href="#250">250</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="251" href="#251">251</a> <strong class="jxr_keyword">return</strong> zk.exists(path, watcher); |
| <a class="jxr_linenumber" name="252" href="#252">252</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="253" href="#253">253</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="254" href="#254">254</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="255" href="#255">255</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="256" href="#256">256</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="257" href="#257">257</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"exists"</span>); |
| <a class="jxr_linenumber" name="258" href="#258">258</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="259" href="#259">259</a> |
| <a class="jxr_linenumber" name="260" href="#260">260</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="261" href="#261">261</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="262" href="#262">262</a> } |
| <a class="jxr_linenumber" name="263" href="#263">263</a> } |
| <a class="jxr_linenumber" name="264" href="#264">264</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="265" href="#265">265</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="266" href="#266">266</a> } |
| <a class="jxr_linenumber" name="267" href="#267">267</a> } |
| <a class="jxr_linenumber" name="268" href="#268">268</a> |
| <a class="jxr_linenumber" name="269" href="#269">269</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="270" href="#270">270</a> <em class="jxr_javadoccomment"> * exists is an idempotent operation. Retry before throwing exception</em> |
| <a class="jxr_linenumber" name="271" href="#271">271</a> <em class="jxr_javadoccomment"> * @return A Stat instance</em> |
| <a class="jxr_linenumber" name="272" href="#272">272</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="273" href="#273">273</a> <strong class="jxr_keyword">public</strong> Stat exists(String path, <strong class="jxr_keyword">boolean</strong> watch) |
| <a class="jxr_linenumber" name="274" href="#274">274</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="275" href="#275">275</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="276" href="#276">276</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="277" href="#277">277</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="278" href="#278">278</a> <strong class="jxr_keyword">return</strong> zk.exists(path, watch); |
| <a class="jxr_linenumber" name="279" href="#279">279</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="280" href="#280">280</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="281" href="#281">281</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="282" href="#282">282</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="283" href="#283">283</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="284" href="#284">284</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"exists"</span>); |
| <a class="jxr_linenumber" name="285" href="#285">285</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="286" href="#286">286</a> |
| <a class="jxr_linenumber" name="287" href="#287">287</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="288" href="#288">288</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="289" href="#289">289</a> } |
| <a class="jxr_linenumber" name="290" href="#290">290</a> } |
| <a class="jxr_linenumber" name="291" href="#291">291</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="292" href="#292">292</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="293" href="#293">293</a> } |
| <a class="jxr_linenumber" name="294" href="#294">294</a> } |
| <a class="jxr_linenumber" name="295" href="#295">295</a> |
| <a class="jxr_linenumber" name="296" href="#296">296</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> retryOrThrow(<a href="../../../../org/trafodion/rest/util/RetryCounter.html">RetryCounter</a> retryCounter, KeeperException e, |
| <a class="jxr_linenumber" name="297" href="#297">297</a> String opName) <strong class="jxr_keyword">throws</strong> KeeperException { |
| <a class="jxr_linenumber" name="298" href="#298">298</a> LOG.warn(<span class="jxr_string">"Possibly transient ZooKeeper exception: "</span> + e); |
| <a class="jxr_linenumber" name="299" href="#299">299</a> <strong class="jxr_keyword">if</strong> (!retryCounter.shouldRetry()) { |
| <a class="jxr_linenumber" name="300" href="#300">300</a> LOG.error(<span class="jxr_string">"ZooKeeper "</span> + opName + <span class="jxr_string">" failed after "</span> |
| <a class="jxr_linenumber" name="301" href="#301">301</a> + retryCounter.getMaxRetries() + <span class="jxr_string">" retries"</span>); |
| <a class="jxr_linenumber" name="302" href="#302">302</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="303" href="#303">303</a> } |
| <a class="jxr_linenumber" name="304" href="#304">304</a> } |
| <a class="jxr_linenumber" name="305" href="#305">305</a> |
| <a class="jxr_linenumber" name="306" href="#306">306</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="307" href="#307">307</a> <em class="jxr_javadoccomment"> * getChildren is an idempotent operation. Retry before throwing exception</em> |
| <a class="jxr_linenumber" name="308" href="#308">308</a> <em class="jxr_javadoccomment"> * @return List of children znodes</em> |
| <a class="jxr_linenumber" name="309" href="#309">309</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="310" href="#310">310</a> <strong class="jxr_keyword">public</strong> List<String> getChildren(String path, Watcher watcher) |
| <a class="jxr_linenumber" name="311" href="#311">311</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="312" href="#312">312</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="313" href="#313">313</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="314" href="#314">314</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="315" href="#315">315</a> <strong class="jxr_keyword">return</strong> zk.getChildren(path, watcher); |
| <a class="jxr_linenumber" name="316" href="#316">316</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="317" href="#317">317</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="318" href="#318">318</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="319" href="#319">319</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="320" href="#320">320</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="321" href="#321">321</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"getChildren"</span>); |
| <a class="jxr_linenumber" name="322" href="#322">322</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="323" href="#323">323</a> |
| <a class="jxr_linenumber" name="324" href="#324">324</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="325" href="#325">325</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="326" href="#326">326</a> } |
| <a class="jxr_linenumber" name="327" href="#327">327</a> } |
| <a class="jxr_linenumber" name="328" href="#328">328</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="329" href="#329">329</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="330" href="#330">330</a> } |
| <a class="jxr_linenumber" name="331" href="#331">331</a> } |
| <a class="jxr_linenumber" name="332" href="#332">332</a> |
| <a class="jxr_linenumber" name="333" href="#333">333</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="334" href="#334">334</a> <em class="jxr_javadoccomment"> * getData is an idempotent operation. Retry before throwing exception</em> |
| <a class="jxr_linenumber" name="335" href="#335">335</a> <em class="jxr_javadoccomment"> * @return Data</em> |
| <a class="jxr_linenumber" name="336" href="#336">336</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="337" href="#337">337</a> <strong class="jxr_keyword">public</strong> byte[] getData(String path, Watcher watcher, Stat stat) |
| <a class="jxr_linenumber" name="338" href="#338">338</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="339" href="#339">339</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="340" href="#340">340</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="341" href="#341">341</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="342" href="#342">342</a> byte[] revData = zk.getData(path, watcher, stat); |
| <a class="jxr_linenumber" name="343" href="#343">343</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.removeMetaData(revData); |
| <a class="jxr_linenumber" name="344" href="#344">344</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="345" href="#345">345</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="346" href="#346">346</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="347" href="#347">347</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="348" href="#348">348</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="349" href="#349">349</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"getData"</span>); |
| <a class="jxr_linenumber" name="350" href="#350">350</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="351" href="#351">351</a> |
| <a class="jxr_linenumber" name="352" href="#352">352</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="353" href="#353">353</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="354" href="#354">354</a> } |
| <a class="jxr_linenumber" name="355" href="#355">355</a> } |
| <a class="jxr_linenumber" name="356" href="#356">356</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="357" href="#357">357</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="358" href="#358">358</a> } |
| <a class="jxr_linenumber" name="359" href="#359">359</a> } |
| <a class="jxr_linenumber" name="360" href="#360">360</a> |
| <a class="jxr_linenumber" name="361" href="#361">361</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="362" href="#362">362</a> <em class="jxr_javadoccomment"> * getData is an idemnpotent operation. Retry before throwing exception</em> |
| <a class="jxr_linenumber" name="363" href="#363">363</a> <em class="jxr_javadoccomment"> * @return Data</em> |
| <a class="jxr_linenumber" name="364" href="#364">364</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="365" href="#365">365</a> <strong class="jxr_keyword">public</strong> byte[] getData(String path, <strong class="jxr_keyword">boolean</strong> watch, Stat stat) |
| <a class="jxr_linenumber" name="366" href="#366">366</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="367" href="#367">367</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="368" href="#368">368</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="369" href="#369">369</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="370" href="#370">370</a> byte[] revData = zk.getData(path, watch, stat); |
| <a class="jxr_linenumber" name="371" href="#371">371</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>.removeMetaData(revData); |
| <a class="jxr_linenumber" name="372" href="#372">372</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="373" href="#373">373</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="374" href="#374">374</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="375" href="#375">375</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="376" href="#376">376</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="377" href="#377">377</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"getData"</span>); |
| <a class="jxr_linenumber" name="378" href="#378">378</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="379" href="#379">379</a> |
| <a class="jxr_linenumber" name="380" href="#380">380</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="381" href="#381">381</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="382" href="#382">382</a> } |
| <a class="jxr_linenumber" name="383" href="#383">383</a> } |
| <a class="jxr_linenumber" name="384" href="#384">384</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="385" href="#385">385</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="386" href="#386">386</a> } |
| <a class="jxr_linenumber" name="387" href="#387">387</a> } |
| <a class="jxr_linenumber" name="388" href="#388">388</a> |
| <a class="jxr_linenumber" name="389" href="#389">389</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="390" href="#390">390</a> <em class="jxr_javadoccomment"> * setData is NOT an idempotent operation. Retry may cause BadVersion Exception</em> |
| <a class="jxr_linenumber" name="391" href="#391">391</a> <em class="jxr_javadoccomment"> * Adding an identifier field into the data to check whether </em> |
| <a class="jxr_linenumber" name="392" href="#392">392</a> <em class="jxr_javadoccomment"> * badversion is caused by the result of previous correctly setData</em> |
| <a class="jxr_linenumber" name="393" href="#393">393</a> <em class="jxr_javadoccomment"> * @return Stat instance</em> |
| <a class="jxr_linenumber" name="394" href="#394">394</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="395" href="#395">395</a> <strong class="jxr_keyword">public</strong> Stat setData(String path, byte[] data, <strong class="jxr_keyword">int</strong> version) |
| <a class="jxr_linenumber" name="396" href="#396">396</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="397" href="#397">397</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="398" href="#398">398</a> <em class="jxr_comment">// byte[] newData = appendMetaData(data);</em> |
| <a class="jxr_linenumber" name="399" href="#399">399</a> byte[] newData = data; |
| <a class="jxr_linenumber" name="400" href="#400">400</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="401" href="#401">401</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="402" href="#402">402</a> <strong class="jxr_keyword">return</strong> zk.setData(path, newData, version); |
| <a class="jxr_linenumber" name="403" href="#403">403</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="404" href="#404">404</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="405" href="#405">405</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="406" href="#406">406</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="407" href="#407">407</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="408" href="#408">408</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"setData"</span>); |
| <a class="jxr_linenumber" name="409" href="#409">409</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="410" href="#410">410</a> <strong class="jxr_keyword">case</strong> BADVERSION: |
| <a class="jxr_linenumber" name="411" href="#411">411</a> <em class="jxr_comment">// try to verify whether the previous setData success or not</em> |
| <a class="jxr_linenumber" name="412" href="#412">412</a> <strong class="jxr_keyword">try</strong>{ |
| <a class="jxr_linenumber" name="413" href="#413">413</a> Stat stat = <strong class="jxr_keyword">new</strong> Stat(); |
| <a class="jxr_linenumber" name="414" href="#414">414</a> byte[] revData = zk.getData(path, false, stat); |
| <a class="jxr_linenumber" name="415" href="#415">415</a> <strong class="jxr_keyword">if</strong> (Bytes.equals(revData, newData)) { |
| <a class="jxr_linenumber" name="416" href="#416">416</a> <em class="jxr_comment">// the bad version is caused by previous successful setData</em> |
| <a class="jxr_linenumber" name="417" href="#417">417</a> <strong class="jxr_keyword">return</strong> stat; |
| <a class="jxr_linenumber" name="418" href="#418">418</a> } |
| <a class="jxr_linenumber" name="419" href="#419">419</a> } <strong class="jxr_keyword">catch</strong>(KeeperException keeperException){ |
| <a class="jxr_linenumber" name="420" href="#420">420</a> <em class="jxr_comment">// the ZK is not reliable at this moment. just throwing exception</em> |
| <a class="jxr_linenumber" name="421" href="#421">421</a> <strong class="jxr_keyword">throw</strong> keeperException; |
| <a class="jxr_linenumber" name="422" href="#422">422</a> } |
| <a class="jxr_linenumber" name="423" href="#423">423</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="424" href="#424">424</a> |
| <a class="jxr_linenumber" name="425" href="#425">425</a> <em class="jxr_comment">// throw other exceptions and verified bad version exceptions</em> |
| <a class="jxr_linenumber" name="426" href="#426">426</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="427" href="#427">427</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="428" href="#428">428</a> } |
| <a class="jxr_linenumber" name="429" href="#429">429</a> } |
| <a class="jxr_linenumber" name="430" href="#430">430</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="431" href="#431">431</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="432" href="#432">432</a> } |
| <a class="jxr_linenumber" name="433" href="#433">433</a> } |
| <a class="jxr_linenumber" name="434" href="#434">434</a> |
| <a class="jxr_linenumber" name="435" href="#435">435</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="436" href="#436">436</a> <em class="jxr_javadoccomment"> * <p></em> |
| <a class="jxr_linenumber" name="437" href="#437">437</a> <em class="jxr_javadoccomment"> * NONSEQUENTIAL create is idempotent operation. </em> |
| <a class="jxr_linenumber" name="438" href="#438">438</a> <em class="jxr_javadoccomment"> * Retry before throwing exceptions.</em> |
| <a class="jxr_linenumber" name="439" href="#439">439</a> <em class="jxr_javadoccomment"> * But this function will not throw the NodeExist exception back to the</em> |
| <a class="jxr_linenumber" name="440" href="#440">440</a> <em class="jxr_javadoccomment"> * application.</em> |
| <a class="jxr_linenumber" name="441" href="#441">441</a> <em class="jxr_javadoccomment"> * </p></em> |
| <a class="jxr_linenumber" name="442" href="#442">442</a> <em class="jxr_javadoccomment"> * <p></em> |
| <a class="jxr_linenumber" name="443" href="#443">443</a> <em class="jxr_javadoccomment"> * But SEQUENTIAL is NOT idempotent operation. It is necessary to add </em> |
| <a class="jxr_linenumber" name="444" href="#444">444</a> <em class="jxr_javadoccomment"> * identifier to the path to verify, whether the previous one is successful </em> |
| <a class="jxr_linenumber" name="445" href="#445">445</a> <em class="jxr_javadoccomment"> * or not.</em> |
| <a class="jxr_linenumber" name="446" href="#446">446</a> <em class="jxr_javadoccomment"> * </p></em> |
| <a class="jxr_linenumber" name="447" href="#447">447</a> <em class="jxr_javadoccomment"> * </em> |
| <a class="jxr_linenumber" name="448" href="#448">448</a> <em class="jxr_javadoccomment"> * @return Path</em> |
| <a class="jxr_linenumber" name="449" href="#449">449</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="450" href="#450">450</a> <strong class="jxr_keyword">public</strong> String create(String path, byte[] data, List<ACL> acl, |
| <a class="jxr_linenumber" name="451" href="#451">451</a> CreateMode createMode) |
| <a class="jxr_linenumber" name="452" href="#452">452</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="453" href="#453">453</a> <em class="jxr_comment">// byte[] newData = appendMetaData(data);</em> |
| <a class="jxr_linenumber" name="454" href="#454">454</a> byte[] newData = data; |
| <a class="jxr_linenumber" name="455" href="#455">455</a> <strong class="jxr_keyword">switch</strong> (createMode) { |
| <a class="jxr_linenumber" name="456" href="#456">456</a> <strong class="jxr_keyword">case</strong> EPHEMERAL: |
| <a class="jxr_linenumber" name="457" href="#457">457</a> <strong class="jxr_keyword">case</strong> PERSISTENT: |
| <a class="jxr_linenumber" name="458" href="#458">458</a> <strong class="jxr_keyword">return</strong> createNonSequential(path, newData, acl, createMode); |
| <a class="jxr_linenumber" name="459" href="#459">459</a> |
| <a class="jxr_linenumber" name="460" href="#460">460</a> <strong class="jxr_keyword">case</strong> EPHEMERAL_SEQUENTIAL: |
| <a class="jxr_linenumber" name="461" href="#461">461</a> <strong class="jxr_keyword">case</strong> PERSISTENT_SEQUENTIAL: |
| <a class="jxr_linenumber" name="462" href="#462">462</a> <strong class="jxr_keyword">return</strong> createSequential(path, newData, acl, createMode); |
| <a class="jxr_linenumber" name="463" href="#463">463</a> |
| <a class="jxr_linenumber" name="464" href="#464">464</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="465" href="#465">465</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"Unrecognized CreateMode: "</span> + |
| <a class="jxr_linenumber" name="466" href="#466">466</a> createMode); |
| <a class="jxr_linenumber" name="467" href="#467">467</a> } |
| <a class="jxr_linenumber" name="468" href="#468">468</a> } |
| <a class="jxr_linenumber" name="469" href="#469">469</a> |
| <a class="jxr_linenumber" name="470" href="#470">470</a> <strong class="jxr_keyword">private</strong> String createNonSequential(String path, byte[] data, List<ACL> acl, |
| <a class="jxr_linenumber" name="471" href="#471">471</a> CreateMode createMode) <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="472" href="#472">472</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="473" href="#473">473</a> <strong class="jxr_keyword">boolean</strong> isRetry = false; <em class="jxr_comment">// False for first attempt, true for all retries.</em> |
| <a class="jxr_linenumber" name="474" href="#474">474</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="475" href="#475">475</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="476" href="#476">476</a> <strong class="jxr_keyword">return</strong> zk.create(path, data, acl, createMode); |
| <a class="jxr_linenumber" name="477" href="#477">477</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="478" href="#478">478</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="479" href="#479">479</a> <strong class="jxr_keyword">case</strong> NODEEXISTS: |
| <a class="jxr_linenumber" name="480" href="#480">480</a> <strong class="jxr_keyword">if</strong> (isRetry) { |
| <a class="jxr_linenumber" name="481" href="#481">481</a> <em class="jxr_comment">// If the connection was lost, there is still a possibility that</em> |
| <a class="jxr_linenumber" name="482" href="#482">482</a> <em class="jxr_comment">// we have successfully created the node at our previous attempt,</em> |
| <a class="jxr_linenumber" name="483" href="#483">483</a> <em class="jxr_comment">// so we read the node and compare. </em> |
| <a class="jxr_linenumber" name="484" href="#484">484</a> byte[] currentData = zk.getData(path, false, <strong class="jxr_keyword">null</strong>); |
| <a class="jxr_linenumber" name="485" href="#485">485</a> <strong class="jxr_keyword">if</strong> (currentData != <strong class="jxr_keyword">null</strong> && |
| <a class="jxr_linenumber" name="486" href="#486">486</a> Bytes.compareTo(currentData, data) == 0) { |
| <a class="jxr_linenumber" name="487" href="#487">487</a> <em class="jxr_comment">// We successfully created a non-sequential node</em> |
| <a class="jxr_linenumber" name="488" href="#488">488</a> <strong class="jxr_keyword">return</strong> path; |
| <a class="jxr_linenumber" name="489" href="#489">489</a> } |
| <a class="jxr_linenumber" name="490" href="#490">490</a> LOG.error(<span class="jxr_string">"Node "</span> + path + <span class="jxr_string">" already exists with "</span> + |
| <a class="jxr_linenumber" name="491" href="#491">491</a> Bytes.toStringBinary(currentData) + <span class="jxr_string">", could not write "</span> + |
| <a class="jxr_linenumber" name="492" href="#492">492</a> Bytes.toStringBinary(data)); |
| <a class="jxr_linenumber" name="493" href="#493">493</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="494" href="#494">494</a> } |
| <a class="jxr_linenumber" name="495" href="#495">495</a> LOG.info(<span class="jxr_string">"Node "</span> + path + <span class="jxr_string">" already exists and this is not a "</span> + |
| <a class="jxr_linenumber" name="496" href="#496">496</a> <span class="jxr_string">"retry"</span>); |
| <a class="jxr_linenumber" name="497" href="#497">497</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="498" href="#498">498</a> |
| <a class="jxr_linenumber" name="499" href="#499">499</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="500" href="#500">500</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="501" href="#501">501</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="502" href="#502">502</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"create"</span>); |
| <a class="jxr_linenumber" name="503" href="#503">503</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="504" href="#504">504</a> |
| <a class="jxr_linenumber" name="505" href="#505">505</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="506" href="#506">506</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="507" href="#507">507</a> } |
| <a class="jxr_linenumber" name="508" href="#508">508</a> } |
| <a class="jxr_linenumber" name="509" href="#509">509</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="510" href="#510">510</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="511" href="#511">511</a> isRetry = <strong class="jxr_keyword">true</strong>; |
| <a class="jxr_linenumber" name="512" href="#512">512</a> } |
| <a class="jxr_linenumber" name="513" href="#513">513</a> } |
| <a class="jxr_linenumber" name="514" href="#514">514</a> |
| <a class="jxr_linenumber" name="515" href="#515">515</a> <strong class="jxr_keyword">private</strong> String createSequential(String path, byte[] data, |
| <a class="jxr_linenumber" name="516" href="#516">516</a> List<ACL> acl, CreateMode createMode) |
| <a class="jxr_linenumber" name="517" href="#517">517</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="518" href="#518">518</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="519" href="#519">519</a> <strong class="jxr_keyword">boolean</strong> first = <strong class="jxr_keyword">true</strong>; |
| <a class="jxr_linenumber" name="520" href="#520">520</a> <em class="jxr_comment">//String newPath = path+this.identifier;</em> |
| <a class="jxr_linenumber" name="521" href="#521">521</a> String newPath = path; |
| <a class="jxr_linenumber" name="522" href="#522">522</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="523" href="#523">523</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="524" href="#524">524</a> <strong class="jxr_keyword">if</strong> (!first) { |
| <a class="jxr_linenumber" name="525" href="#525">525</a> <em class="jxr_comment">// Check if we succeeded on a previous attempt</em> |
| <a class="jxr_linenumber" name="526" href="#526">526</a> String previousResult = findPreviousSequentialNode(newPath); |
| <a class="jxr_linenumber" name="527" href="#527">527</a> <strong class="jxr_keyword">if</strong> (previousResult != <strong class="jxr_keyword">null</strong>) { |
| <a class="jxr_linenumber" name="528" href="#528">528</a> <strong class="jxr_keyword">return</strong> previousResult; |
| <a class="jxr_linenumber" name="529" href="#529">529</a> } |
| <a class="jxr_linenumber" name="530" href="#530">530</a> } |
| <a class="jxr_linenumber" name="531" href="#531">531</a> first = false; |
| <a class="jxr_linenumber" name="532" href="#532">532</a> <strong class="jxr_keyword">return</strong> zk.create(newPath, data, acl, createMode); |
| <a class="jxr_linenumber" name="533" href="#533">533</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="534" href="#534">534</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="535" href="#535">535</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="536" href="#536">536</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="537" href="#537">537</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="538" href="#538">538</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"create"</span>); |
| <a class="jxr_linenumber" name="539" href="#539">539</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="540" href="#540">540</a> |
| <a class="jxr_linenumber" name="541" href="#541">541</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="542" href="#542">542</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="543" href="#543">543</a> } |
| <a class="jxr_linenumber" name="544" href="#544">544</a> } |
| <a class="jxr_linenumber" name="545" href="#545">545</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="546" href="#546">546</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="547" href="#547">547</a> } |
| <a class="jxr_linenumber" name="548" href="#548">548</a> } |
| <a class="jxr_linenumber" name="549" href="#549">549</a> |
| <a class="jxr_linenumber" name="550" href="#550">550</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="551" href="#551">551</a> <em class="jxr_javadoccomment"> * Convert Iterable of {@link ZKOp} we got into the ZooKeeper.Op</em> |
| <a class="jxr_linenumber" name="552" href="#552">552</a> <em class="jxr_javadoccomment"> * instances to actually pass to multi (need to do this in order to appendMetaData).</em> |
| <a class="jxr_linenumber" name="553" href="#553">553</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="554" href="#554">554</a> <strong class="jxr_keyword">private</strong> Iterable<Op> prepareZKMulti(Iterable<Op> ops) |
| <a class="jxr_linenumber" name="555" href="#555">555</a> <strong class="jxr_keyword">throws</strong> UnsupportedOperationException { |
| <a class="jxr_linenumber" name="556" href="#556">556</a> <strong class="jxr_keyword">if</strong>(ops == <strong class="jxr_keyword">null</strong>) <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>; |
| <a class="jxr_linenumber" name="557" href="#557">557</a> |
| <a class="jxr_linenumber" name="558" href="#558">558</a> List<Op> preparedOps = <strong class="jxr_keyword">new</strong> LinkedList<Op>(); |
| <a class="jxr_linenumber" name="559" href="#559">559</a> <strong class="jxr_keyword">for</strong> (Op op : ops) { |
| <a class="jxr_linenumber" name="560" href="#560">560</a> <strong class="jxr_keyword">if</strong> (op.getType() == ZooDefs.OpCode.create) { |
| <a class="jxr_linenumber" name="561" href="#561">561</a> CreateRequest create = (CreateRequest)op.toRequestRecord(); |
| <a class="jxr_linenumber" name="562" href="#562">562</a> preparedOps.add(Op.create(create.getPath(), appendMetaData(create.getData()), |
| <a class="jxr_linenumber" name="563" href="#563">563</a> create.getAcl(), create.getFlags())); |
| <a class="jxr_linenumber" name="564" href="#564">564</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (op.getType() == ZooDefs.OpCode.delete) { |
| <a class="jxr_linenumber" name="565" href="#565">565</a> <em class="jxr_comment">// no need to appendMetaData for delete</em> |
| <a class="jxr_linenumber" name="566" href="#566">566</a> preparedOps.add(op); |
| <a class="jxr_linenumber" name="567" href="#567">567</a> } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (op.getType() == ZooDefs.OpCode.setData) { |
| <a class="jxr_linenumber" name="568" href="#568">568</a> SetDataRequest setData = (SetDataRequest)op.toRequestRecord(); |
| <a class="jxr_linenumber" name="569" href="#569">569</a> preparedOps.add(Op.setData(setData.getPath(), appendMetaData(setData.getData()), |
| <a class="jxr_linenumber" name="570" href="#570">570</a> setData.getVersion())); |
| <a class="jxr_linenumber" name="571" href="#571">571</a> } <strong class="jxr_keyword">else</strong> { |
| <a class="jxr_linenumber" name="572" href="#572">572</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnsupportedOperationException(<span class="jxr_string">"Unexpected ZKOp type: "</span> + op.getClass().getName()); |
| <a class="jxr_linenumber" name="573" href="#573">573</a> } |
| <a class="jxr_linenumber" name="574" href="#574">574</a> } |
| <a class="jxr_linenumber" name="575" href="#575">575</a> <strong class="jxr_keyword">return</strong> preparedOps; |
| <a class="jxr_linenumber" name="576" href="#576">576</a> } |
| <a class="jxr_linenumber" name="577" href="#577">577</a> |
| <a class="jxr_linenumber" name="578" href="#578">578</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="579" href="#579">579</a> <em class="jxr_javadoccomment"> * Run multiple operations in a transactional manner. Retry before throwing exception</em> |
| <a class="jxr_linenumber" name="580" href="#580">580</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="581" href="#581">581</a> <strong class="jxr_keyword">public</strong> List<OpResult> multi(Iterable<Op> ops) |
| <a class="jxr_linenumber" name="582" href="#582">582</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="583" href="#583">583</a> RetryCounter retryCounter = retryCounterFactory.create(); |
| <a class="jxr_linenumber" name="584" href="#584">584</a> Iterable<Op> multiOps = prepareZKMulti(ops); |
| <a class="jxr_linenumber" name="585" href="#585">585</a> <strong class="jxr_keyword">while</strong> (<strong class="jxr_keyword">true</strong>) { |
| <a class="jxr_linenumber" name="586" href="#586">586</a> <strong class="jxr_keyword">try</strong> { |
| <a class="jxr_linenumber" name="587" href="#587">587</a> <strong class="jxr_keyword">return</strong> zk.multi(multiOps); |
| <a class="jxr_linenumber" name="588" href="#588">588</a> } <strong class="jxr_keyword">catch</strong> (KeeperException e) { |
| <a class="jxr_linenumber" name="589" href="#589">589</a> <strong class="jxr_keyword">switch</strong> (e.code()) { |
| <a class="jxr_linenumber" name="590" href="#590">590</a> <strong class="jxr_keyword">case</strong> CONNECTIONLOSS: |
| <a class="jxr_linenumber" name="591" href="#591">591</a> <strong class="jxr_keyword">case</strong> SESSIONEXPIRED: |
| <a class="jxr_linenumber" name="592" href="#592">592</a> <strong class="jxr_keyword">case</strong> OPERATIONTIMEOUT: |
| <a class="jxr_linenumber" name="593" href="#593">593</a> retryOrThrow(retryCounter, e, <span class="jxr_string">"multi"</span>); |
| <a class="jxr_linenumber" name="594" href="#594">594</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="595" href="#595">595</a> |
| <a class="jxr_linenumber" name="596" href="#596">596</a> <strong class="jxr_keyword">default</strong>: |
| <a class="jxr_linenumber" name="597" href="#597">597</a> <strong class="jxr_keyword">throw</strong> e; |
| <a class="jxr_linenumber" name="598" href="#598">598</a> } |
| <a class="jxr_linenumber" name="599" href="#599">599</a> } |
| <a class="jxr_linenumber" name="600" href="#600">600</a> retryCounter.sleepUntilNextRetry(); |
| <a class="jxr_linenumber" name="601" href="#601">601</a> retryCounter.useRetry(); |
| <a class="jxr_linenumber" name="602" href="#602">602</a> } |
| <a class="jxr_linenumber" name="603" href="#603">603</a> } |
| <a class="jxr_linenumber" name="604" href="#604">604</a> |
| <a class="jxr_linenumber" name="605" href="#605">605</a> <strong class="jxr_keyword">private</strong> String findPreviousSequentialNode(String path) |
| <a class="jxr_linenumber" name="606" href="#606">606</a> <strong class="jxr_keyword">throws</strong> KeeperException, InterruptedException { |
| <a class="jxr_linenumber" name="607" href="#607">607</a> <strong class="jxr_keyword">int</strong> lastSlashIdx = path.lastIndexOf('/'); |
| <a class="jxr_linenumber" name="608" href="#608">608</a> assert(lastSlashIdx != -1); |
| <a class="jxr_linenumber" name="609" href="#609">609</a> String parent = path.substring(0, lastSlashIdx); |
| <a class="jxr_linenumber" name="610" href="#610">610</a> String nodePrefix = path.substring(lastSlashIdx+1); |
| <a class="jxr_linenumber" name="611" href="#611">611</a> |
| <a class="jxr_linenumber" name="612" href="#612">612</a> List<String> nodes = zk.getChildren(parent, false); |
| <a class="jxr_linenumber" name="613" href="#613">613</a> List<String> matching = filterByPrefix(nodes, nodePrefix); |
| <a class="jxr_linenumber" name="614" href="#614">614</a> <strong class="jxr_keyword">for</strong> (String node : matching) { |
| <a class="jxr_linenumber" name="615" href="#615">615</a> String nodePath = parent + <span class="jxr_string">"/"</span> + node; |
| <a class="jxr_linenumber" name="616" href="#616">616</a> Stat stat = zk.exists(nodePath, false); |
| <a class="jxr_linenumber" name="617" href="#617">617</a> <strong class="jxr_keyword">if</strong> (stat != <strong class="jxr_keyword">null</strong>) { |
| <a class="jxr_linenumber" name="618" href="#618">618</a> <strong class="jxr_keyword">return</strong> nodePath; |
| <a class="jxr_linenumber" name="619" href="#619">619</a> } |
| <a class="jxr_linenumber" name="620" href="#620">620</a> } |
| <a class="jxr_linenumber" name="621" href="#621">621</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>; |
| <a class="jxr_linenumber" name="622" href="#622">622</a> } |
| <a class="jxr_linenumber" name="623" href="#623">623</a> |
| <a class="jxr_linenumber" name="624" href="#624">624</a> <strong class="jxr_keyword">public</strong> byte[] removeMetaData(byte[] data) { |
| <a class="jxr_linenumber" name="625" href="#625">625</a> <strong class="jxr_keyword">if</strong>(data == <strong class="jxr_keyword">null</strong> || data.length == 0) { |
| <a class="jxr_linenumber" name="626" href="#626">626</a> <strong class="jxr_keyword">return</strong> data; |
| <a class="jxr_linenumber" name="627" href="#627">627</a> } |
| <a class="jxr_linenumber" name="628" href="#628">628</a> <em class="jxr_comment">// check the magic data; to be backward compatible</em> |
| <a class="jxr_linenumber" name="629" href="#629">629</a> byte magic = data[0]; |
| <a class="jxr_linenumber" name="630" href="#630">630</a> <strong class="jxr_keyword">if</strong>(magic != MAGIC) { |
| <a class="jxr_linenumber" name="631" href="#631">631</a> <strong class="jxr_keyword">return</strong> data; |
| <a class="jxr_linenumber" name="632" href="#632">632</a> } |
| <a class="jxr_linenumber" name="633" href="#633">633</a> |
| <a class="jxr_linenumber" name="634" href="#634">634</a> <strong class="jxr_keyword">int</strong> idLength = Bytes.toInt(data, ID_LENGTH_OFFSET); |
| <a class="jxr_linenumber" name="635" href="#635">635</a> <strong class="jxr_keyword">int</strong> dataLength = data.length-MAGIC_SIZE-ID_LENGTH_SIZE-idLength; |
| <a class="jxr_linenumber" name="636" href="#636">636</a> <strong class="jxr_keyword">int</strong> dataOffset = MAGIC_SIZE+ID_LENGTH_SIZE+idLength; |
| <a class="jxr_linenumber" name="637" href="#637">637</a> |
| <a class="jxr_linenumber" name="638" href="#638">638</a> byte[] newData = <strong class="jxr_keyword">new</strong> byte[dataLength]; |
| <a class="jxr_linenumber" name="639" href="#639">639</a> System.arraycopy(data, dataOffset, newData, 0, dataLength); |
| <a class="jxr_linenumber" name="640" href="#640">640</a> |
| <a class="jxr_linenumber" name="641" href="#641">641</a> <strong class="jxr_keyword">return</strong> newData; |
| <a class="jxr_linenumber" name="642" href="#642">642</a> |
| <a class="jxr_linenumber" name="643" href="#643">643</a> } |
| <a class="jxr_linenumber" name="644" href="#644">644</a> |
| <a class="jxr_linenumber" name="645" href="#645">645</a> <strong class="jxr_keyword">private</strong> byte[] appendMetaData(byte[] data) { |
| <a class="jxr_linenumber" name="646" href="#646">646</a> <strong class="jxr_keyword">if</strong>(data == <strong class="jxr_keyword">null</strong> || data.length == 0){ |
| <a class="jxr_linenumber" name="647" href="#647">647</a> <strong class="jxr_keyword">return</strong> data; |
| <a class="jxr_linenumber" name="648" href="#648">648</a> } |
| <a class="jxr_linenumber" name="649" href="#649">649</a> |
| <a class="jxr_linenumber" name="650" href="#650">650</a> byte[] newData = <strong class="jxr_keyword">new</strong> byte[MAGIC_SIZE+ID_LENGTH_SIZE+id.length+data.length]; |
| <a class="jxr_linenumber" name="651" href="#651">651</a> <strong class="jxr_keyword">int</strong> pos = 0; |
| <a class="jxr_linenumber" name="652" href="#652">652</a> pos = Bytes.putByte(newData, pos, MAGIC); |
| <a class="jxr_linenumber" name="653" href="#653">653</a> pos = Bytes.putInt(newData, pos, id.length); |
| <a class="jxr_linenumber" name="654" href="#654">654</a> pos = Bytes.putBytes(newData, pos, id, 0, id.length); |
| <a class="jxr_linenumber" name="655" href="#655">655</a> pos = Bytes.putBytes(newData, pos, data, 0, data.length); |
| <a class="jxr_linenumber" name="656" href="#656">656</a> |
| <a class="jxr_linenumber" name="657" href="#657">657</a> <strong class="jxr_keyword">return</strong> newData; |
| <a class="jxr_linenumber" name="658" href="#658">658</a> } |
| <a class="jxr_linenumber" name="659" href="#659">659</a> |
| <a class="jxr_linenumber" name="660" href="#660">660</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> getSessionId() { |
| <a class="jxr_linenumber" name="661" href="#661">661</a> <strong class="jxr_keyword">return</strong> zk.getSessionId(); |
| <a class="jxr_linenumber" name="662" href="#662">662</a> } |
| <a class="jxr_linenumber" name="663" href="#663">663</a> |
| <a class="jxr_linenumber" name="664" href="#664">664</a> <strong class="jxr_keyword">public</strong> States getState() { |
| <a class="jxr_linenumber" name="665" href="#665">665</a> <strong class="jxr_keyword">return</strong> zk.getState(); |
| <a class="jxr_linenumber" name="666" href="#666">666</a> } |
| <a class="jxr_linenumber" name="667" href="#667">667</a> |
| <a class="jxr_linenumber" name="668" href="#668">668</a> <strong class="jxr_keyword">public</strong> ZooKeeper getZooKeeper() { |
| <a class="jxr_linenumber" name="669" href="#669">669</a> <strong class="jxr_keyword">return</strong> zk; |
| <a class="jxr_linenumber" name="670" href="#670">670</a> } |
| <a class="jxr_linenumber" name="671" href="#671">671</a> |
| <a class="jxr_linenumber" name="672" href="#672">672</a> <strong class="jxr_keyword">public</strong> byte[] getSessionPasswd() { |
| <a class="jxr_linenumber" name="673" href="#673">673</a> <strong class="jxr_keyword">return</strong> zk.getSessionPasswd(); |
| <a class="jxr_linenumber" name="674" href="#674">674</a> } |
| <a class="jxr_linenumber" name="675" href="#675">675</a> |
| <a class="jxr_linenumber" name="676" href="#676">676</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> sync(String path, AsyncCallback.VoidCallback cb, Object ctx) { |
| <a class="jxr_linenumber" name="677" href="#677">677</a> <strong class="jxr_keyword">this</strong>.zk.sync(path, <strong class="jxr_keyword">null</strong>, <strong class="jxr_keyword">null</strong>); |
| <a class="jxr_linenumber" name="678" href="#678">678</a> } |
| <a class="jxr_linenumber" name="679" href="#679">679</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="680" href="#680">680</a> <em class="jxr_javadoccomment"> * Filters the given node list by the given prefixes.</em> |
| <a class="jxr_linenumber" name="681" href="#681">681</a> <em class="jxr_javadoccomment"> * This method is all-inclusive--if any element in the node list starts</em> |
| <a class="jxr_linenumber" name="682" href="#682">682</a> <em class="jxr_javadoccomment"> * with any of the given prefixes, then it is included in the result.</em> |
| <a class="jxr_linenumber" name="683" href="#683">683</a> <em class="jxr_javadoccomment"> *</em> |
| <a class="jxr_linenumber" name="684" href="#684">684</a> <em class="jxr_javadoccomment"> * @param nodes the nodes to filter</em> |
| <a class="jxr_linenumber" name="685" href="#685">685</a> <em class="jxr_javadoccomment"> * @param prefixes the prefixes to include in the result</em> |
| <a class="jxr_linenumber" name="686" href="#686">686</a> <em class="jxr_javadoccomment"> * @return list of every element that starts with one of the prefixes</em> |
| <a class="jxr_linenumber" name="687" href="#687">687</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="688" href="#688">688</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> List<String> filterByPrefix(List<String> nodes, |
| <a class="jxr_linenumber" name="689" href="#689">689</a> String... prefixes) { |
| <a class="jxr_linenumber" name="690" href="#690">690</a> List<String> lockChildren = <strong class="jxr_keyword">new</strong> ArrayList<String>(); |
| <a class="jxr_linenumber" name="691" href="#691">691</a> <strong class="jxr_keyword">for</strong> (String child : nodes){ |
| <a class="jxr_linenumber" name="692" href="#692">692</a> <strong class="jxr_keyword">for</strong> (String prefix : prefixes){ |
| <a class="jxr_linenumber" name="693" href="#693">693</a> <strong class="jxr_keyword">if</strong> (child.startsWith(prefix)){ |
| <a class="jxr_linenumber" name="694" href="#694">694</a> lockChildren.add(child); |
| <a class="jxr_linenumber" name="695" href="#695">695</a> <strong class="jxr_keyword">break</strong>; |
| <a class="jxr_linenumber" name="696" href="#696">696</a> } |
| <a class="jxr_linenumber" name="697" href="#697">697</a> } |
| <a class="jxr_linenumber" name="698" href="#698">698</a> } |
| <a class="jxr_linenumber" name="699" href="#699">699</a> <strong class="jxr_keyword">return</strong> lockChildren; |
| <a class="jxr_linenumber" name="700" href="#700">700</a> } |
| <a class="jxr_linenumber" name="701" href="#701">701</a> |
| <a class="jxr_linenumber" name="702" href="#702">702</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> main(String [] args) <strong class="jxr_keyword">throws</strong> Exception { |
| <a class="jxr_linenumber" name="703" href="#703">703</a> ZkClient zkc = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/rest/zookeeper/ZkClient.html">ZkClient</a>(); |
| <a class="jxr_linenumber" name="704" href="#704">704</a> } |
| <a class="jxr_linenumber" name="705" href="#705">705</a> } |
| </pre> |
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