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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.replication;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.util.Collections;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.Map;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.Set;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.concurrent.ConcurrentMap;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.conf.Configuration;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.replication.ReplicationPeer.PeerState;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.zookeeper.ZKWatcher;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span><a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span><a name="line.31"></a> |
| <span class="sourceLineNo">032</span>/**<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * This provides an class for maintaining a set of peer clusters. These peers are remote slave<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * clusters that data is replicated to.<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> */<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>@InterfaceAudience.Private<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>public class ReplicationPeers {<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span> private final Configuration conf;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span><a name="line.40"></a> |
| <span class="sourceLineNo">041</span> // Map of peer clusters keyed by their id<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private final ConcurrentMap<String, ReplicationPeerImpl> peerCache;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> private final ReplicationPeerStorage peerStorage;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span><a name="line.44"></a> |
| <span class="sourceLineNo">045</span> ReplicationPeers(ZKWatcher zookeeper, Configuration conf) {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> this.conf = conf;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> this.peerCache = new ConcurrentHashMap<>();<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> this.peerStorage = ReplicationStorageFactory.getReplicationPeerStorage(zookeeper, conf);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> }<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> public Configuration getConf() {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> return conf;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> }<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> public void init() throws ReplicationException {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> // Loading all existing peerIds into peer cache.<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> for (String peerId : this.peerStorage.listPeerIds()) {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> addPeer(peerId);<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> }<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> }<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> @VisibleForTesting<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> public ReplicationPeerStorage getPeerStorage() {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> return this.peerStorage;<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> }<a name="line.65"></a> |
| <span class="sourceLineNo">066</span><a name="line.66"></a> |
| <span class="sourceLineNo">067</span> /**<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * Method called after a peer has been connected. It will create a ReplicationPeer to track the<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * newly connected cluster.<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * @param peerId a short that identifies the cluster<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * @return whether a ReplicationPeer was successfully created<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * @throws ReplicationException if connecting to the peer fails<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> */<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> public boolean addPeer(String peerId) throws ReplicationException {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> if (this.peerCache.containsKey(peerId)) {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> return false;<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> }<a name="line.77"></a> |
| <span class="sourceLineNo">078</span><a name="line.78"></a> |
| <span class="sourceLineNo">079</span> peerCache.put(peerId, createPeer(peerId));<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> return true;<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> }<a name="line.81"></a> |
| <span class="sourceLineNo">082</span><a name="line.82"></a> |
| <span class="sourceLineNo">083</span> public ReplicationPeerImpl removePeer(String peerId) {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> return peerCache.remove(peerId);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span><a name="line.86"></a> |
| <span class="sourceLineNo">087</span> /**<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> * Returns the ReplicationPeerImpl for the specified cached peer. This ReplicationPeer will<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> * continue to track changes to the Peer's state and config. This method returns null if no peer<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> * has been cached with the given peerId.<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> * @param peerId id for the peer<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> * @return ReplicationPeer object<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> */<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> public ReplicationPeerImpl getPeer(String peerId) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> return peerCache.get(peerId);<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span><a name="line.97"></a> |
| <span class="sourceLineNo">098</span> /**<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> * Returns the set of peerIds of the clusters that have been connected and have an underlying<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> * ReplicationPeer.<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> * @return a Set of Strings for peerIds<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> */<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> public Set<String> getAllPeerIds() {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> return Collections.unmodifiableSet(peerCache.keySet());<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> }<a name="line.105"></a> |
| <span class="sourceLineNo">106</span><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> public Map<String, ReplicationPeerImpl> getPeerCache() {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> return Collections.unmodifiableMap(peerCache);<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> }<a name="line.109"></a> |
| <span class="sourceLineNo">110</span><a name="line.110"></a> |
| <span class="sourceLineNo">111</span> public PeerState refreshPeerState(String peerId) throws ReplicationException {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> ReplicationPeerImpl peer = peerCache.get(peerId);<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> peer.setPeerState(peerStorage.isPeerEnabled(peerId));<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> return peer.getPeerState();<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> }<a name="line.115"></a> |
| <span class="sourceLineNo">116</span><a name="line.116"></a> |
| <span class="sourceLineNo">117</span> public ReplicationPeerConfig refreshPeerConfig(String peerId) throws ReplicationException {<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> ReplicationPeerImpl peer = peerCache.get(peerId);<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> peer.setPeerConfig(peerStorage.getPeerConfig(peerId));<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> return peer.getPeerConfig();<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> }<a name="line.121"></a> |
| <span class="sourceLineNo">122</span><a name="line.122"></a> |
| <span class="sourceLineNo">123</span> public SyncReplicationState refreshPeerNewSyncReplicationState(String peerId)<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> throws ReplicationException {<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> ReplicationPeerImpl peer = peerCache.get(peerId);<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> SyncReplicationState newState = peerStorage.getPeerNewSyncReplicationState(peerId);<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> peer.setNewSyncReplicationState(newState);<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> return newState;<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> public void transitPeerSyncReplicationState(String peerId) {<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> ReplicationPeerImpl peer = peerCache.get(peerId);<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> peer.transitSyncReplicationState();<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> }<a name="line.134"></a> |
| <span class="sourceLineNo">135</span><a name="line.135"></a> |
| <span class="sourceLineNo">136</span> /**<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> * Helper method to connect to a peer<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> * @param peerId peer's identifier<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> * @return object representing the peer<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> */<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> private ReplicationPeerImpl createPeer(String peerId) throws ReplicationException {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> ReplicationPeerConfig peerConfig = peerStorage.getPeerConfig(peerId);<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> boolean enabled = peerStorage.isPeerEnabled(peerId);<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> SyncReplicationState syncReplicationState = peerStorage.getPeerSyncReplicationState(peerId);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> SyncReplicationState newSyncReplicationState =<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> peerStorage.getPeerNewSyncReplicationState(peerId);<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> return new ReplicationPeerImpl(ReplicationUtils.getPeerClusterConfiguration(peerConfig, conf),<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> peerId, peerConfig, enabled, syncReplicationState, newSyncReplicationState);<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> }<a name="line.149"></a> |
| <span class="sourceLineNo">150</span>}<a name="line.150"></a> |
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| </pre> |
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