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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.ipc;</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.util.concurrent.BlockingQueue;</span> |
| <span class="source-line-no">021</span><span id="line-21">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.Abortable;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.HBaseInterfaceAudience;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.conf.ConfigurationObserver;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceStability;</span> |
| <span class="source-line-no">027</span><span id="line-27"></span> |
| <span class="source-line-no">028</span><span id="line-28">/**</span> |
| <span class="source-line-no">029</span><span id="line-29"> * An {@link RpcExecutor} that will balance requests evenly across all its queues, but still remains</span> |
| <span class="source-line-no">030</span><span id="line-30"> * efficient with a single queue via an inlinable queue balancing mechanism. Defaults to FIFO but</span> |
| <span class="source-line-no">031</span><span id="line-31"> * you can pass an alternate queue class to use.</span> |
| <span class="source-line-no">032</span><span id="line-32"> */</span> |
| <span class="source-line-no">033</span><span id="line-33">@InterfaceAudience.LimitedPrivate({ HBaseInterfaceAudience.COPROC, HBaseInterfaceAudience.PHOENIX })</span> |
| <span class="source-line-no">034</span><span id="line-34">@InterfaceStability.Evolving</span> |
| <span class="source-line-no">035</span><span id="line-35">public class BalancedQueueRpcExecutor extends RpcExecutor {</span> |
| <span class="source-line-no">036</span><span id="line-36"></span> |
| <span class="source-line-no">037</span><span id="line-37"> private final QueueBalancer balancer;</span> |
| <span class="source-line-no">038</span><span id="line-38"></span> |
| <span class="source-line-no">039</span><span id="line-39"> public BalancedQueueRpcExecutor(final String name, final int handlerCount,</span> |
| <span class="source-line-no">040</span><span id="line-40"> final int maxQueueLength, final PriorityFunction priority, final Configuration conf,</span> |
| <span class="source-line-no">041</span><span id="line-41"> final Abortable abortable) {</span> |
| <span class="source-line-no">042</span><span id="line-42"> this(name, handlerCount, conf.get(CALL_QUEUE_TYPE_CONF_KEY, CALL_QUEUE_TYPE_CONF_DEFAULT),</span> |
| <span class="source-line-no">043</span><span id="line-43"> maxQueueLength, priority, conf, abortable);</span> |
| <span class="source-line-no">044</span><span id="line-44"> }</span> |
| <span class="source-line-no">045</span><span id="line-45"></span> |
| <span class="source-line-no">046</span><span id="line-46"> public BalancedQueueRpcExecutor(final String name, final int handlerCount,</span> |
| <span class="source-line-no">047</span><span id="line-47"> final String callQueueType, final int maxQueueLength, final PriorityFunction priority,</span> |
| <span class="source-line-no">048</span><span id="line-48"> final Configuration conf, final Abortable abortable) {</span> |
| <span class="source-line-no">049</span><span id="line-49"> super(name, handlerCount, callQueueType, maxQueueLength, priority, conf, abortable);</span> |
| <span class="source-line-no">050</span><span id="line-50"> initializeQueues(this.numCallQueues);</span> |
| <span class="source-line-no">051</span><span id="line-51"> this.balancer = getBalancer(name, conf, getQueues());</span> |
| <span class="source-line-no">052</span><span id="line-52"> }</span> |
| <span class="source-line-no">053</span><span id="line-53"></span> |
| <span class="source-line-no">054</span><span id="line-54"> @Override</span> |
| <span class="source-line-no">055</span><span id="line-55"> public boolean dispatch(final CallRunner callTask) {</span> |
| <span class="source-line-no">056</span><span id="line-56"> int queueIndex = balancer.getNextQueue(callTask);</span> |
| <span class="source-line-no">057</span><span id="line-57"> BlockingQueue<CallRunner> queue = queues.get(queueIndex);</span> |
| <span class="source-line-no">058</span><span id="line-58"> // that means we can overflow by at most <num reader> size (5), that's ok</span> |
| <span class="source-line-no">059</span><span id="line-59"> if (queue.size() >= currentQueueLimit) {</span> |
| <span class="source-line-no">060</span><span id="line-60"> return false;</span> |
| <span class="source-line-no">061</span><span id="line-61"> }</span> |
| <span class="source-line-no">062</span><span id="line-62"> return queue.offer(callTask);</span> |
| <span class="source-line-no">063</span><span id="line-63"> }</span> |
| <span class="source-line-no">064</span><span id="line-64"></span> |
| <span class="source-line-no">065</span><span id="line-65"> @Override</span> |
| <span class="source-line-no">066</span><span id="line-66"> public void onConfigurationChange(Configuration conf) {</span> |
| <span class="source-line-no">067</span><span id="line-67"> super.onConfigurationChange(conf);</span> |
| <span class="source-line-no">068</span><span id="line-68"></span> |
| <span class="source-line-no">069</span><span id="line-69"> if (balancer instanceof ConfigurationObserver) {</span> |
| <span class="source-line-no">070</span><span id="line-70"> ((ConfigurationObserver) balancer).onConfigurationChange(conf);</span> |
| <span class="source-line-no">071</span><span id="line-71"> }</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> |
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