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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.util;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.ArrayList;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.Collection;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.HashMap;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.List;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.Locale;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.Map;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.Objects;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">029</span><span id="line-29"></span> |
| <span class="source-line-no">030</span><span id="line-30">/**</span> |
| <span class="source-line-no">031</span><span id="line-31"> * The <code>PoolMap</code> maps a key to a collection of values, the elements of which are managed</span> |
| <span class="source-line-no">032</span><span id="line-32"> * by a pool. In effect, that collection acts as a shared pool of resources, access to which is</span> |
| <span class="source-line-no">033</span><span id="line-33"> * closely controlled as per the semantics of the pool.</span> |
| <span class="source-line-no">034</span><span id="line-34"> * <p></span> |
| <span class="source-line-no">035</span><span id="line-35"> * In case the size of the pool is set to a non-zero positive number, that is used to cap the number</span> |
| <span class="source-line-no">036</span><span id="line-36"> * of resources that a pool may contain for any given key. A size of {@link Integer#MAX_VALUE} is</span> |
| <span class="source-line-no">037</span><span id="line-37"> * interpreted as an unbounded pool.</span> |
| <span class="source-line-no">038</span><span id="line-38"> * </p></span> |
| <span class="source-line-no">039</span><span id="line-39"> * <p></span> |
| <span class="source-line-no">040</span><span id="line-40"> * PoolMap is thread-safe. It does not remove elements automatically. Unused resources must be</span> |
| <span class="source-line-no">041</span><span id="line-41"> * closed and removed explicitly.</span> |
| <span class="source-line-no">042</span><span id="line-42"> * </p></span> |
| <span class="source-line-no">043</span><span id="line-43"> * @param <K> the type of the key to the resource</span> |
| <span class="source-line-no">044</span><span id="line-44"> * @param <V> the type of the resource being pooled</span> |
| <span class="source-line-no">045</span><span id="line-45"> */</span> |
| <span class="source-line-no">046</span><span id="line-46">@InterfaceAudience.Private</span> |
| <span class="source-line-no">047</span><span id="line-47">public class PoolMap<K, V> {</span> |
| <span class="source-line-no">048</span><span id="line-48"> private final Map<K, Pool<V>> pools;</span> |
| <span class="source-line-no">049</span><span id="line-49"> private final PoolType poolType;</span> |
| <span class="source-line-no">050</span><span id="line-50"> private final int poolMaxSize;</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> public PoolMap(PoolType poolType, int poolMaxSize) {</span> |
| <span class="source-line-no">053</span><span id="line-53"> pools = new HashMap<>();</span> |
| <span class="source-line-no">054</span><span id="line-54"> this.poolType = poolType;</span> |
| <span class="source-line-no">055</span><span id="line-55"> this.poolMaxSize = poolMaxSize;</span> |
| <span class="source-line-no">056</span><span id="line-56"> }</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58"> public V getOrCreate(K key, PoolResourceSupplier<V> supplier) throws IOException {</span> |
| <span class="source-line-no">059</span><span id="line-59"> synchronized (pools) {</span> |
| <span class="source-line-no">060</span><span id="line-60"> Pool<V> pool = pools.get(key);</span> |
| <span class="source-line-no">061</span><span id="line-61"></span> |
| <span class="source-line-no">062</span><span id="line-62"> if (pool == null) {</span> |
| <span class="source-line-no">063</span><span id="line-63"> pool = createPool();</span> |
| <span class="source-line-no">064</span><span id="line-64"> pools.put(key, pool);</span> |
| <span class="source-line-no">065</span><span id="line-65"> }</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> try {</span> |
| <span class="source-line-no">068</span><span id="line-68"> return pool.getOrCreate(supplier);</span> |
| <span class="source-line-no">069</span><span id="line-69"> } catch (IOException | RuntimeException | Error e) {</span> |
| <span class="source-line-no">070</span><span id="line-70"> if (pool.size() == 0) {</span> |
| <span class="source-line-no">071</span><span id="line-71"> pools.remove(key);</span> |
| <span class="source-line-no">072</span><span id="line-72"> }</span> |
| <span class="source-line-no">073</span><span id="line-73"></span> |
| <span class="source-line-no">074</span><span id="line-74"> throw e;</span> |
| <span class="source-line-no">075</span><span id="line-75"> }</span> |
| <span class="source-line-no">076</span><span id="line-76"> }</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> public boolean remove(K key, V value) {</span> |
| <span class="source-line-no">080</span><span id="line-80"> synchronized (pools) {</span> |
| <span class="source-line-no">081</span><span id="line-81"> Pool<V> pool = pools.get(key);</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> if (pool == null) {</span> |
| <span class="source-line-no">084</span><span id="line-84"> return false;</span> |
| <span class="source-line-no">085</span><span id="line-85"> }</span> |
| <span class="source-line-no">086</span><span id="line-86"></span> |
| <span class="source-line-no">087</span><span id="line-87"> boolean removed = pool.remove(value);</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> if (removed && pool.size() == 0) {</span> |
| <span class="source-line-no">090</span><span id="line-90"> pools.remove(key);</span> |
| <span class="source-line-no">091</span><span id="line-91"> }</span> |
| <span class="source-line-no">092</span><span id="line-92"></span> |
| <span class="source-line-no">093</span><span id="line-93"> return removed;</span> |
| <span class="source-line-no">094</span><span id="line-94"> }</span> |
| <span class="source-line-no">095</span><span id="line-95"> }</span> |
| <span class="source-line-no">096</span><span id="line-96"></span> |
| <span class="source-line-no">097</span><span id="line-97"> public List<V> values() {</span> |
| <span class="source-line-no">098</span><span id="line-98"> List<V> values = new ArrayList<>();</span> |
| <span class="source-line-no">099</span><span id="line-99"></span> |
| <span class="source-line-no">100</span><span id="line-100"> synchronized (pools) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> for (Pool<V> pool : pools.values()) {</span> |
| <span class="source-line-no">102</span><span id="line-102"> Collection<V> poolValues = pool.values();</span> |
| <span class="source-line-no">103</span><span id="line-103"> if (poolValues != null) {</span> |
| <span class="source-line-no">104</span><span id="line-104"> values.addAll(poolValues);</span> |
| <span class="source-line-no">105</span><span id="line-105"> }</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"> }</span> |
| <span class="source-line-no">108</span><span id="line-108"></span> |
| <span class="source-line-no">109</span><span id="line-109"> return values;</span> |
| <span class="source-line-no">110</span><span id="line-110"> }</span> |
| <span class="source-line-no">111</span><span id="line-111"></span> |
| <span class="source-line-no">112</span><span id="line-112"> public void clear() {</span> |
| <span class="source-line-no">113</span><span id="line-113"> synchronized (pools) {</span> |
| <span class="source-line-no">114</span><span id="line-114"> for (Pool<V> pool : pools.values()) {</span> |
| <span class="source-line-no">115</span><span id="line-115"> pool.clear();</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117"></span> |
| <span class="source-line-no">118</span><span id="line-118"> pools.clear();</span> |
| <span class="source-line-no">119</span><span id="line-119"> }</span> |
| <span class="source-line-no">120</span><span id="line-120"> }</span> |
| <span class="source-line-no">121</span><span id="line-121"></span> |
| <span class="source-line-no">122</span><span id="line-122"> public interface PoolResourceSupplier<R> {</span> |
| <span class="source-line-no">123</span><span id="line-123"> R get() throws IOException;</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> protected static <V> V createResource(PoolResourceSupplier<V> supplier) throws IOException {</span> |
| <span class="source-line-no">127</span><span id="line-127"> V resource = supplier.get();</span> |
| <span class="source-line-no">128</span><span id="line-128"> return Objects.requireNonNull(resource, "resource cannot be null.");</span> |
| <span class="source-line-no">129</span><span id="line-129"> }</span> |
| <span class="source-line-no">130</span><span id="line-130"></span> |
| <span class="source-line-no">131</span><span id="line-131"> protected interface Pool<R> {</span> |
| <span class="source-line-no">132</span><span id="line-132"> R getOrCreate(PoolResourceSupplier<R> supplier) throws IOException;</span> |
| <span class="source-line-no">133</span><span id="line-133"></span> |
| <span class="source-line-no">134</span><span id="line-134"> boolean remove(R resource);</span> |
| <span class="source-line-no">135</span><span id="line-135"></span> |
| <span class="source-line-no">136</span><span id="line-136"> void clear();</span> |
| <span class="source-line-no">137</span><span id="line-137"></span> |
| <span class="source-line-no">138</span><span id="line-138"> Collection<R> values();</span> |
| <span class="source-line-no">139</span><span id="line-139"></span> |
| <span class="source-line-no">140</span><span id="line-140"> int size();</span> |
| <span class="source-line-no">141</span><span id="line-141"> }</span> |
| <span class="source-line-no">142</span><span id="line-142"></span> |
| <span class="source-line-no">143</span><span id="line-143"> public enum PoolType {</span> |
| <span class="source-line-no">144</span><span id="line-144"> ThreadLocal,</span> |
| <span class="source-line-no">145</span><span id="line-145"> RoundRobin;</span> |
| <span class="source-line-no">146</span><span id="line-146"></span> |
| <span class="source-line-no">147</span><span id="line-147"> public static PoolType valueOf(String poolTypeName, PoolType defaultPoolType) {</span> |
| <span class="source-line-no">148</span><span id="line-148"> PoolType poolType = PoolType.fuzzyMatch(poolTypeName);</span> |
| <span class="source-line-no">149</span><span id="line-149"> return (poolType != null) ? poolType : defaultPoolType;</span> |
| <span class="source-line-no">150</span><span id="line-150"> }</span> |
| <span class="source-line-no">151</span><span id="line-151"></span> |
| <span class="source-line-no">152</span><span id="line-152"> public static String fuzzyNormalize(String name) {</span> |
| <span class="source-line-no">153</span><span id="line-153"> return name != null ? name.replaceAll("-", "").trim().toLowerCase(Locale.ROOT) : "";</span> |
| <span class="source-line-no">154</span><span id="line-154"> }</span> |
| <span class="source-line-no">155</span><span id="line-155"></span> |
| <span class="source-line-no">156</span><span id="line-156"> public static PoolType fuzzyMatch(String name) {</span> |
| <span class="source-line-no">157</span><span id="line-157"> for (PoolType poolType : values()) {</span> |
| <span class="source-line-no">158</span><span id="line-158"> if (fuzzyNormalize(name).equals(fuzzyNormalize(poolType.name()))) {</span> |
| <span class="source-line-no">159</span><span id="line-159"> return poolType;</span> |
| <span class="source-line-no">160</span><span id="line-160"> }</span> |
| <span class="source-line-no">161</span><span id="line-161"> }</span> |
| <span class="source-line-no">162</span><span id="line-162"> return null;</span> |
| <span class="source-line-no">163</span><span id="line-163"> }</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"></span> |
| <span class="source-line-no">166</span><span id="line-166"> protected Pool<V> createPool() {</span> |
| <span class="source-line-no">167</span><span id="line-167"> switch (poolType) {</span> |
| <span class="source-line-no">168</span><span id="line-168"> case RoundRobin:</span> |
| <span class="source-line-no">169</span><span id="line-169"> return new RoundRobinPool<>(poolMaxSize);</span> |
| <span class="source-line-no">170</span><span id="line-170"> case ThreadLocal:</span> |
| <span class="source-line-no">171</span><span id="line-171"> return new ThreadLocalPool<>();</span> |
| <span class="source-line-no">172</span><span id="line-172"> default:</span> |
| <span class="source-line-no">173</span><span id="line-173"> return new RoundRobinPool<>(poolMaxSize);</span> |
| <span class="source-line-no">174</span><span id="line-174"> }</span> |
| <span class="source-line-no">175</span><span id="line-175"> }</span> |
| <span class="source-line-no">176</span><span id="line-176"></span> |
| <span class="source-line-no">177</span><span id="line-177"> /**</span> |
| <span class="source-line-no">178</span><span id="line-178"> * The <code>RoundRobinPool</code> represents a {@link PoolMap.Pool}, which stores its resources</span> |
| <span class="source-line-no">179</span><span id="line-179"> * in an {@link ArrayList}. It load-balances access to its resources by returning a different</span> |
| <span class="source-line-no">180</span><span id="line-180"> * resource every time a given key is looked up.</span> |
| <span class="source-line-no">181</span><span id="line-181"> * <p></span> |
| <span class="source-line-no">182</span><span id="line-182"> * If {@link #maxSize} is set to {@link Integer#MAX_VALUE}, then the size of the pool is</span> |
| <span class="source-line-no">183</span><span id="line-183"> * unbounded. Otherwise, it caps the number of resources in this pool to the (non-zero positive)</span> |
| <span class="source-line-no">184</span><span id="line-184"> * value specified in {@link #maxSize}.</span> |
| <span class="source-line-no">185</span><span id="line-185"> * </p></span> |
| <span class="source-line-no">186</span><span id="line-186"> * @param <R> the type of the resource</span> |
| <span class="source-line-no">187</span><span id="line-187"> */</span> |
| <span class="source-line-no">188</span><span id="line-188"> @SuppressWarnings("serial")</span> |
| <span class="source-line-no">189</span><span id="line-189"> static class RoundRobinPool<R> implements Pool<R> {</span> |
| <span class="source-line-no">190</span><span id="line-190"> private final List<R> resources;</span> |
| <span class="source-line-no">191</span><span id="line-191"> private final int maxSize;</span> |
| <span class="source-line-no">192</span><span id="line-192"></span> |
| <span class="source-line-no">193</span><span id="line-193"> private int nextIndex;</span> |
| <span class="source-line-no">194</span><span id="line-194"></span> |
| <span class="source-line-no">195</span><span id="line-195"> public RoundRobinPool(int maxSize) {</span> |
| <span class="source-line-no">196</span><span id="line-196"> if (maxSize <= 0) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> throw new IllegalArgumentException("maxSize must be positive");</span> |
| <span class="source-line-no">198</span><span id="line-198"> }</span> |
| <span class="source-line-no">199</span><span id="line-199"></span> |
| <span class="source-line-no">200</span><span id="line-200"> resources = new ArrayList<>(maxSize);</span> |
| <span class="source-line-no">201</span><span id="line-201"> this.maxSize = maxSize;</span> |
| <span class="source-line-no">202</span><span id="line-202"> }</span> |
| <span class="source-line-no">203</span><span id="line-203"></span> |
| <span class="source-line-no">204</span><span id="line-204"> @Override</span> |
| <span class="source-line-no">205</span><span id="line-205"> public R getOrCreate(PoolResourceSupplier<R> supplier) throws IOException {</span> |
| <span class="source-line-no">206</span><span id="line-206"> int size = resources.size();</span> |
| <span class="source-line-no">207</span><span id="line-207"> R resource;</span> |
| <span class="source-line-no">208</span><span id="line-208"></span> |
| <span class="source-line-no">209</span><span id="line-209"> /* letting pool to grow */</span> |
| <span class="source-line-no">210</span><span id="line-210"> if (size < maxSize) {</span> |
| <span class="source-line-no">211</span><span id="line-211"> resource = createResource(supplier);</span> |
| <span class="source-line-no">212</span><span id="line-212"> resources.add(resource);</span> |
| <span class="source-line-no">213</span><span id="line-213"> } else {</span> |
| <span class="source-line-no">214</span><span id="line-214"> resource = resources.get(nextIndex);</span> |
| <span class="source-line-no">215</span><span id="line-215"></span> |
| <span class="source-line-no">216</span><span id="line-216"> /* at this point size cannot be 0 */</span> |
| <span class="source-line-no">217</span><span id="line-217"> nextIndex = (nextIndex + 1) % size;</span> |
| <span class="source-line-no">218</span><span id="line-218"> }</span> |
| <span class="source-line-no">219</span><span id="line-219"></span> |
| <span class="source-line-no">220</span><span id="line-220"> return resource;</span> |
| <span class="source-line-no">221</span><span id="line-221"> }</span> |
| <span class="source-line-no">222</span><span id="line-222"></span> |
| <span class="source-line-no">223</span><span id="line-223"> @Override</span> |
| <span class="source-line-no">224</span><span id="line-224"> public boolean remove(R resource) {</span> |
| <span class="source-line-no">225</span><span id="line-225"> return resources.remove(resource);</span> |
| <span class="source-line-no">226</span><span id="line-226"> }</span> |
| <span class="source-line-no">227</span><span id="line-227"></span> |
| <span class="source-line-no">228</span><span id="line-228"> @Override</span> |
| <span class="source-line-no">229</span><span id="line-229"> public void clear() {</span> |
| <span class="source-line-no">230</span><span id="line-230"> resources.clear();</span> |
| <span class="source-line-no">231</span><span id="line-231"> }</span> |
| <span class="source-line-no">232</span><span id="line-232"></span> |
| <span class="source-line-no">233</span><span id="line-233"> @Override</span> |
| <span class="source-line-no">234</span><span id="line-234"> public Collection<R> values() {</span> |
| <span class="source-line-no">235</span><span id="line-235"> return resources;</span> |
| <span class="source-line-no">236</span><span id="line-236"> }</span> |
| <span class="source-line-no">237</span><span id="line-237"></span> |
| <span class="source-line-no">238</span><span id="line-238"> @Override</span> |
| <span class="source-line-no">239</span><span id="line-239"> public int size() {</span> |
| <span class="source-line-no">240</span><span id="line-240"> return resources.size();</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"> }</span> |
| <span class="source-line-no">243</span><span id="line-243"></span> |
| <span class="source-line-no">244</span><span id="line-244"> /**</span> |
| <span class="source-line-no">245</span><span id="line-245"> * The <code>ThreadLocalPool</code> represents a {@link PoolMap.Pool} that works similarly to</span> |
| <span class="source-line-no">246</span><span id="line-246"> * {@link ThreadLocal} class. It essentially binds the resource to the thread from which it is</span> |
| <span class="source-line-no">247</span><span id="line-247"> * accessed. It doesn't remove resources when a thread exits, those resources must be closed</span> |
| <span class="source-line-no">248</span><span id="line-248"> * manually.</span> |
| <span class="source-line-no">249</span><span id="line-249"> * <p></span> |
| <span class="source-line-no">250</span><span id="line-250"> * Note that the size of the pool is essentially bounded by the number of threads that add</span> |
| <span class="source-line-no">251</span><span id="line-251"> * resources to this pool.</span> |
| <span class="source-line-no">252</span><span id="line-252"> * </p></span> |
| <span class="source-line-no">253</span><span id="line-253"> * @param <R> the type of the resource</span> |
| <span class="source-line-no">254</span><span id="line-254"> */</span> |
| <span class="source-line-no">255</span><span id="line-255"> static class ThreadLocalPool<R> implements Pool<R> {</span> |
| <span class="source-line-no">256</span><span id="line-256"> private final Map<Thread, R> resources;</span> |
| <span class="source-line-no">257</span><span id="line-257"></span> |
| <span class="source-line-no">258</span><span id="line-258"> public ThreadLocalPool() {</span> |
| <span class="source-line-no">259</span><span id="line-259"> resources = new HashMap<>();</span> |
| <span class="source-line-no">260</span><span id="line-260"> }</span> |
| <span class="source-line-no">261</span><span id="line-261"></span> |
| <span class="source-line-no">262</span><span id="line-262"> @Override</span> |
| <span class="source-line-no">263</span><span id="line-263"> public R getOrCreate(PoolResourceSupplier<R> supplier) throws IOException {</span> |
| <span class="source-line-no">264</span><span id="line-264"> Thread myself = Thread.currentThread();</span> |
| <span class="source-line-no">265</span><span id="line-265"> R resource = resources.get(myself);</span> |
| <span class="source-line-no">266</span><span id="line-266"></span> |
| <span class="source-line-no">267</span><span id="line-267"> if (resource == null) {</span> |
| <span class="source-line-no">268</span><span id="line-268"> resource = createResource(supplier);</span> |
| <span class="source-line-no">269</span><span id="line-269"> resources.put(myself, resource);</span> |
| <span class="source-line-no">270</span><span id="line-270"> }</span> |
| <span class="source-line-no">271</span><span id="line-271"></span> |
| <span class="source-line-no">272</span><span id="line-272"> return resource;</span> |
| <span class="source-line-no">273</span><span id="line-273"> }</span> |
| <span class="source-line-no">274</span><span id="line-274"></span> |
| <span class="source-line-no">275</span><span id="line-275"> @Override</span> |
| <span class="source-line-no">276</span><span id="line-276"> public boolean remove(R resource) {</span> |
| <span class="source-line-no">277</span><span id="line-277"> /* remove can be called from any thread */</span> |
| <span class="source-line-no">278</span><span id="line-278"> return resources.values().remove(resource);</span> |
| <span class="source-line-no">279</span><span id="line-279"> }</span> |
| <span class="source-line-no">280</span><span id="line-280"></span> |
| <span class="source-line-no">281</span><span id="line-281"> @Override</span> |
| <span class="source-line-no">282</span><span id="line-282"> public int size() {</span> |
| <span class="source-line-no">283</span><span id="line-283"> return resources.size();</span> |
| <span class="source-line-no">284</span><span id="line-284"> }</span> |
| <span class="source-line-no">285</span><span id="line-285"></span> |
| <span class="source-line-no">286</span><span id="line-286"> @Override</span> |
| <span class="source-line-no">287</span><span id="line-287"> public void clear() {</span> |
| <span class="source-line-no">288</span><span id="line-288"> resources.clear();</span> |
| <span class="source-line-no">289</span><span id="line-289"> }</span> |
| <span class="source-line-no">290</span><span id="line-290"></span> |
| <span class="source-line-no">291</span><span id="line-291"> @Override</span> |
| <span class="source-line-no">292</span><span id="line-292"> public Collection<R> values() {</span> |
| <span class="source-line-no">293</span><span id="line-293"> return resources.values();</span> |
| <span class="source-line-no">294</span><span id="line-294"> }</span> |
| <span class="source-line-no">295</span><span id="line-295"> }</span> |
| <span class="source-line-no">296</span><span id="line-296">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
