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| <a name="1" href="#1">1</a> <strong class="jxr_keyword">package</strong> org.apache.velocity.runtime.resource; |
| <a name="2" href="#2">2</a> |
| <a name="3" href="#3">3</a> <em class="jxr_comment">/*</em> |
| <a name="4" href="#4">4</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em> |
| <a name="5" href="#5">5</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em> |
| <a name="6" href="#6">6</a> <em class="jxr_comment"> * distributed with this work for additional information</em> |
| <a name="7" href="#7">7</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em> |
| <a name="8" href="#8">8</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em> |
| <a name="9" href="#9">9</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em> |
| <a name="10" href="#10">10</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em> |
| <a name="11" href="#11">11</a> <em class="jxr_comment"> *</em> |
| <a name="12" href="#12">12</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em> |
| <a name="13" href="#13">13</a> <em class="jxr_comment"> *</em> |
| <a name="14" href="#14">14</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em> |
| <a name="15" href="#15">15</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em> |
| <a name="16" href="#16">16</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em> |
| <a name="17" href="#17">17</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em> |
| <a name="18" href="#18">18</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em> |
| <a name="19" href="#19">19</a> <em class="jxr_comment"> * under the License. </em> |
| <a name="20" href="#20">20</a> <em class="jxr_comment"> */</em> |
| <a name="21" href="#21">21</a> |
| <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.util.Collections; |
| <a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> java.util.Hashtable; |
| <a name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.util.Map; |
| <a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.util.Iterator; |
| <a name="26" href="#26">26</a> |
| <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.commons.collections.map.LRUMap; |
| <a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.velocity.runtime.RuntimeConstants; |
| <a name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.velocity.runtime.RuntimeServices; |
| <a name="30" href="#30">30</a> |
| <a name="31" href="#31">31</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="32" href="#32">32</a> <em class="jxr_javadoccomment"> * Default implementation of the resource cache for the default</em> |
| <a name="33" href="#33">33</a> <em class="jxr_javadoccomment"> * ResourceManager. The cache uses a <i>least recently used</i> (LRU)</em> |
| <a name="34" href="#34">34</a> <em class="jxr_javadoccomment"> * algorithm, with a maximum size specified via the</em> |
| <a name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * <code>resource.manager.cache.size</code> property (idenfied by the</em> |
| <a name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * {@link</em> |
| <a name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * org.apache.velocity.runtime.RuntimeConstants#RESOURCE_MANAGER_DEFAULTCACHE_SIZE}</em> |
| <a name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * constant). This property get be set to <code>0</code> or less for</em> |
| <a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> * a greedy, unbounded cache (the behavior from pre-v1.5).</em> |
| <a name="40" href="#40">40</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * @author <a href="<a href="mailto:geirm@apache.org" target="alexandria_uri">mailto:geirm@apache.org</a>">Geir Magnusson Jr.</a></em> |
| <a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * @author <a href="<a href="mailto:dlr@finemaltcoding.com" target="alexandria_uri">mailto:dlr@finemaltcoding.com</a>">Daniel Rall</a></em> |
| <a name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * @version $Id: ResourceCacheImpl.java 463298 2006-10-12 16:10:32Z henning $</em> |
| <a name="44" href="#44">44</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="45" href="#45">45</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/velocity/runtime/resource/ResourceCacheImpl.html">ResourceCacheImpl</a> implements <a href="../../../../../org/apache/velocity/runtime/resource/ResourceCache.html">ResourceCache</a> |
| <a name="46" href="#46">46</a> { |
| <a name="47" href="#47">47</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> * Cache storage, assumed to be thread-safe.</em> |
| <a name="49" href="#49">49</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="50" href="#50">50</a> <strong class="jxr_keyword">protected</strong> Map cache = <strong class="jxr_keyword">new</strong> Hashtable(); |
| <a name="51" href="#51">51</a> |
| <a name="52" href="#52">52</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="53" href="#53">53</a> <em class="jxr_javadoccomment"> * Runtime services, generally initialized by the</em> |
| <a name="54" href="#54">54</a> <em class="jxr_javadoccomment"> * <code>initialize()</code> method.</em> |
| <a name="55" href="#55">55</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="56" href="#56">56</a> <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/velocity/runtime/RuntimeServices.html">RuntimeServices</a> rsvc = <strong class="jxr_keyword">null</strong>; |
| <a name="57" href="#57">57</a> |
| <a name="58" href="#58">58</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="59" href="#59">59</a> <em class="jxr_javadoccomment"> * @see org.apache.velocity.runtime.resource.ResourceCache#initialize(org.apache.velocity.runtime.RuntimeServices)</em> |
| <a name="60" href="#60">60</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="61" href="#61">61</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> initialize( RuntimeServices rs ) |
| <a name="62" href="#62">62</a> { |
| <a name="63" href="#63">63</a> rsvc = rs; |
| <a name="64" href="#64">64</a> |
| <a name="65" href="#65">65</a> <strong class="jxr_keyword">int</strong> maxSize = |
| <a name="66" href="#66">66</a> rsvc.getInt(RuntimeConstants.RESOURCE_MANAGER_DEFAULTCACHE_SIZE, 89); |
| <a name="67" href="#67">67</a> <strong class="jxr_keyword">if</strong> (maxSize > 0) |
| <a name="68" href="#68">68</a> { |
| <a name="69" href="#69">69</a> <em class="jxr_comment">// Create a whole new Map here to avoid hanging on to a</em> |
| <a name="70" href="#70">70</a> <em class="jxr_comment">// handle to the unsynch'd LRUMap for our lifetime.</em> |
| <a name="71" href="#71">71</a> Map lruCache = Collections.synchronizedMap(<strong class="jxr_keyword">new</strong> LRUMap(maxSize)); |
| <a name="72" href="#72">72</a> lruCache.putAll(cache); |
| <a name="73" href="#73">73</a> cache = lruCache; |
| <a name="74" href="#74">74</a> } |
| <a name="75" href="#75">75</a> rsvc.getLog().debug(<span class="jxr_string">"ResourceCache: initialized ("</span>+<strong class="jxr_keyword">this</strong>.getClass()+')'); |
| <a name="76" href="#76">76</a> } |
| <a name="77" href="#77">77</a> |
| <a name="78" href="#78">78</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="79" href="#79">79</a> <em class="jxr_javadoccomment"> * @see org.apache.velocity.runtime.resource.ResourceCache#get(java.lang.Object)</em> |
| <a name="80" href="#80">80</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="81" href="#81">81</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/velocity/runtime/resource/Resource.html">Resource</a> get( Object key ) |
| <a name="82" href="#82">82</a> { |
| <a name="83" href="#83">83</a> <strong class="jxr_keyword">return</strong> (Resource) cache.get( key ); |
| <a name="84" href="#84">84</a> } |
| <a name="85" href="#85">85</a> |
| <a name="86" href="#86">86</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="87" href="#87">87</a> <em class="jxr_javadoccomment"> * @see org.apache.velocity.runtime.resource.ResourceCache#put(java.lang.Object, org.apache.velocity.runtime.resource.Resource)</em> |
| <a name="88" href="#88">88</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="89" href="#89">89</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/velocity/runtime/resource/Resource.html">Resource</a> put( Object key, Resource value ) |
| <a name="90" href="#90">90</a> { |
| <a name="91" href="#91">91</a> <strong class="jxr_keyword">return</strong> (Resource) cache.put( key, value ); |
| <a name="92" href="#92">92</a> } |
| <a name="93" href="#93">93</a> |
| <a name="94" href="#94">94</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="95" href="#95">95</a> <em class="jxr_javadoccomment"> * @see org.apache.velocity.runtime.resource.ResourceCache#remove(java.lang.Object)</em> |
| <a name="96" href="#96">96</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="97" href="#97">97</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/velocity/runtime/resource/Resource.html">Resource</a> remove( Object key ) |
| <a name="98" href="#98">98</a> { |
| <a name="99" href="#99">99</a> <strong class="jxr_keyword">return</strong> (Resource) cache.remove( key ); |
| <a name="100" href="#100">100</a> } |
| <a name="101" href="#101">101</a> |
| <a name="102" href="#102">102</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="103" href="#103">103</a> <em class="jxr_javadoccomment"> * @see org.apache.velocity.runtime.resource.ResourceCache#enumerateKeys()</em> |
| <a name="104" href="#104">104</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="105" href="#105">105</a> <strong class="jxr_keyword">public</strong> Iterator enumerateKeys() |
| <a name="106" href="#106">106</a> { |
| <a name="107" href="#107">107</a> <strong class="jxr_keyword">return</strong> cache.keySet().iterator(); |
| <a name="108" href="#108">108</a> } |
| <a name="109" href="#109">109</a> } |
| </pre> |
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