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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.Queue;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.concurrent.atomic.AtomicInteger;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.Abortable;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.HBaseInterfaceAudience;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.conf.ConfigurationObserver;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.yetus.audience.InterfaceStability;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.slf4j.Logger;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">030</span><span id="line-30"></span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hbase.thirdparty.com.google.protobuf.Message;</span> |
| <span class="source-line-no">032</span><span id="line-32"></span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.Action;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MultiRequest;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MutateRequest;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.RegionAction;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos;</span> |
| <span class="source-line-no">040</span><span id="line-40"></span> |
| <span class="source-line-no">041</span><span id="line-41">/**</span> |
| <span class="source-line-no">042</span><span id="line-42"> * RPC Executor that uses different queues for reads and writes. With the options to use different</span> |
| <span class="source-line-no">043</span><span id="line-43"> * queues/executors for gets and scans. Each handler has its own queue and there is no stealing.</span> |
| <span class="source-line-no">044</span><span id="line-44"> */</span> |
| <span class="source-line-no">045</span><span id="line-45">@InterfaceAudience.LimitedPrivate({ HBaseInterfaceAudience.COPROC, HBaseInterfaceAudience.PHOENIX })</span> |
| <span class="source-line-no">046</span><span id="line-46">@InterfaceStability.Evolving</span> |
| <span class="source-line-no">047</span><span id="line-47">public class RWQueueRpcExecutor extends RpcExecutor {</span> |
| <span class="source-line-no">048</span><span id="line-48"> private static final Logger LOG = LoggerFactory.getLogger(RWQueueRpcExecutor.class);</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> public static final String CALL_QUEUE_READ_SHARE_CONF_KEY =</span> |
| <span class="source-line-no">051</span><span id="line-51"> "hbase.ipc.server.callqueue.read.ratio";</span> |
| <span class="source-line-no">052</span><span id="line-52"> public static final String CALL_QUEUE_SCAN_SHARE_CONF_KEY =</span> |
| <span class="source-line-no">053</span><span id="line-53"> "hbase.ipc.server.callqueue.scan.ratio";</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> private final QueueBalancer writeBalancer;</span> |
| <span class="source-line-no">056</span><span id="line-56"> private final QueueBalancer readBalancer;</span> |
| <span class="source-line-no">057</span><span id="line-57"> private final QueueBalancer scanBalancer;</span> |
| <span class="source-line-no">058</span><span id="line-58"> private final int writeHandlersCount;</span> |
| <span class="source-line-no">059</span><span id="line-59"> private final int readHandlersCount;</span> |
| <span class="source-line-no">060</span><span id="line-60"> private final int scanHandlersCount;</span> |
| <span class="source-line-no">061</span><span id="line-61"> private final int numWriteQueues;</span> |
| <span class="source-line-no">062</span><span id="line-62"> private final int numReadQueues;</span> |
| <span class="source-line-no">063</span><span id="line-63"> private final int numScanQueues;</span> |
| <span class="source-line-no">064</span><span id="line-64"></span> |
| <span class="source-line-no">065</span><span id="line-65"> private final AtomicInteger activeWriteHandlerCount = new AtomicInteger(0);</span> |
| <span class="source-line-no">066</span><span id="line-66"> private final AtomicInteger activeReadHandlerCount = new AtomicInteger(0);</span> |
| <span class="source-line-no">067</span><span id="line-67"> private final AtomicInteger activeScanHandlerCount = new AtomicInteger(0);</span> |
| <span class="source-line-no">068</span><span id="line-68"></span> |
| <span class="source-line-no">069</span><span id="line-69"> public RWQueueRpcExecutor(final String name, final int handlerCount, final int maxQueueLength,</span> |
| <span class="source-line-no">070</span><span id="line-70"> final PriorityFunction priority, final Configuration conf, final Abortable abortable) {</span> |
| <span class="source-line-no">071</span><span id="line-71"> super(name, handlerCount, maxQueueLength, priority, conf, abortable);</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> float callqReadShare = getReadShare(conf);</span> |
| <span class="source-line-no">074</span><span id="line-74"> float callqScanShare = getScanShare(conf);</span> |
| <span class="source-line-no">075</span><span id="line-75"></span> |
| <span class="source-line-no">076</span><span id="line-76"> numWriteQueues = calcNumWriters(this.numCallQueues, callqReadShare);</span> |
| <span class="source-line-no">077</span><span id="line-77"> writeHandlersCount = Math.max(numWriteQueues, calcNumWriters(handlerCount, callqReadShare));</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> int readQueues = calcNumReaders(this.numCallQueues, callqReadShare);</span> |
| <span class="source-line-no">080</span><span id="line-80"> int readHandlers = Math.max(readQueues, calcNumReaders(handlerCount, callqReadShare));</span> |
| <span class="source-line-no">081</span><span id="line-81"></span> |
| <span class="source-line-no">082</span><span id="line-82"> int scanHandlers = Math.max(0, (int) Math.floor(readHandlers * callqScanShare));</span> |
| <span class="source-line-no">083</span><span id="line-83"> int scanQueues =</span> |
| <span class="source-line-no">084</span><span id="line-84"> scanHandlers > 0 ? Math.max(1, (int) Math.floor(readQueues * callqScanShare)) : 0;</span> |
| <span class="source-line-no">085</span><span id="line-85"></span> |
| <span class="source-line-no">086</span><span id="line-86"> if (scanQueues > 0) {</span> |
| <span class="source-line-no">087</span><span id="line-87"> // if scanQueues > 0, the handler count of read should > 0, then we make readQueues >= 1</span> |
| <span class="source-line-no">088</span><span id="line-88"> readQueues = Math.max(1, readQueues - scanQueues);</span> |
| <span class="source-line-no">089</span><span id="line-89"> readHandlers -= scanHandlers;</span> |
| <span class="source-line-no">090</span><span id="line-90"> } else {</span> |
| <span class="source-line-no">091</span><span id="line-91"> scanQueues = 0;</span> |
| <span class="source-line-no">092</span><span id="line-92"> scanHandlers = 0;</span> |
| <span class="source-line-no">093</span><span id="line-93"> }</span> |
| <span class="source-line-no">094</span><span id="line-94"></span> |
| <span class="source-line-no">095</span><span id="line-95"> numReadQueues = readQueues;</span> |
| <span class="source-line-no">096</span><span id="line-96"> readHandlersCount = readHandlers;</span> |
| <span class="source-line-no">097</span><span id="line-97"> numScanQueues = scanQueues;</span> |
| <span class="source-line-no">098</span><span id="line-98"> scanHandlersCount = scanHandlers;</span> |
| <span class="source-line-no">099</span><span id="line-99"></span> |
| <span class="source-line-no">100</span><span id="line-100"> initializeQueues(numWriteQueues);</span> |
| <span class="source-line-no">101</span><span id="line-101"> initializeQueues(numReadQueues);</span> |
| <span class="source-line-no">102</span><span id="line-102"> initializeQueues(numScanQueues);</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> this.writeBalancer = getBalancer(name, conf, queues.subList(0, numWriteQueues));</span> |
| <span class="source-line-no">105</span><span id="line-105"> this.readBalancer =</span> |
| <span class="source-line-no">106</span><span id="line-106"> getBalancer(name, conf, queues.subList(numWriteQueues, numWriteQueues + numReadQueues));</span> |
| <span class="source-line-no">107</span><span id="line-107"> this.scanBalancer = numScanQueues > 0</span> |
| <span class="source-line-no">108</span><span id="line-108"> ? getBalancer(name, conf,</span> |
| <span class="source-line-no">109</span><span id="line-109"> queues.subList(numWriteQueues + numReadQueues,</span> |
| <span class="source-line-no">110</span><span id="line-110"> numWriteQueues + numReadQueues + numScanQueues))</span> |
| <span class="source-line-no">111</span><span id="line-111"> : null;</span> |
| <span class="source-line-no">112</span><span id="line-112"></span> |
| <span class="source-line-no">113</span><span id="line-113"> LOG.info(getName() + " writeQueues=" + numWriteQueues + " writeHandlers=" + writeHandlersCount</span> |
| <span class="source-line-no">114</span><span id="line-114"> + " readQueues=" + numReadQueues + " readHandlers=" + readHandlersCount + " scanQueues="</span> |
| <span class="source-line-no">115</span><span id="line-115"> + numScanQueues + " scanHandlers=" + scanHandlersCount);</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"> @Override</span> |
| <span class="source-line-no">119</span><span id="line-119"> protected int computeNumCallQueues(final int handlerCount, final float callQueuesHandlersFactor) {</span> |
| <span class="source-line-no">120</span><span id="line-120"> // at least 1 read queue and 1 write queue</span> |
| <span class="source-line-no">121</span><span id="line-121"> return Math.max(2, (int) Math.round(handlerCount * callQueuesHandlersFactor));</span> |
| <span class="source-line-no">122</span><span id="line-122"> }</span> |
| <span class="source-line-no">123</span><span id="line-123"></span> |
| <span class="source-line-no">124</span><span id="line-124"> @Override</span> |
| <span class="source-line-no">125</span><span id="line-125"> protected void startHandlers(final int port) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> startHandlers(".write", writeHandlersCount, queues, 0, numWriteQueues, port,</span> |
| <span class="source-line-no">127</span><span id="line-127"> activeWriteHandlerCount);</span> |
| <span class="source-line-no">128</span><span id="line-128"> startHandlers(".read", readHandlersCount, queues, numWriteQueues, numReadQueues, port,</span> |
| <span class="source-line-no">129</span><span id="line-129"> activeReadHandlerCount);</span> |
| <span class="source-line-no">130</span><span id="line-130"> if (numScanQueues > 0) {</span> |
| <span class="source-line-no">131</span><span id="line-131"> startHandlers(".scan", scanHandlersCount, queues, numWriteQueues + numReadQueues,</span> |
| <span class="source-line-no">132</span><span id="line-132"> numScanQueues, port, activeScanHandlerCount);</span> |
| <span class="source-line-no">133</span><span id="line-133"> }</span> |
| <span class="source-line-no">134</span><span id="line-134"> }</span> |
| <span class="source-line-no">135</span><span id="line-135"></span> |
| <span class="source-line-no">136</span><span id="line-136"> @Override</span> |
| <span class="source-line-no">137</span><span id="line-137"> public boolean dispatch(final CallRunner callTask) {</span> |
| <span class="source-line-no">138</span><span id="line-138"> RpcCall call = callTask.getRpcCall();</span> |
| <span class="source-line-no">139</span><span id="line-139"> return dispatchTo(isWriteRequest(call.getHeader(), call.getParam()),</span> |
| <span class="source-line-no">140</span><span id="line-140"> shouldDispatchToScanQueue(callTask), callTask);</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"> protected boolean dispatchTo(boolean toWriteQueue, boolean toScanQueue,</span> |
| <span class="source-line-no">144</span><span id="line-144"> final CallRunner callTask) {</span> |
| <span class="source-line-no">145</span><span id="line-145"> int queueIndex;</span> |
| <span class="source-line-no">146</span><span id="line-146"> if (toWriteQueue) {</span> |
| <span class="source-line-no">147</span><span id="line-147"> queueIndex = writeBalancer.getNextQueue(callTask);</span> |
| <span class="source-line-no">148</span><span id="line-148"> } else if (toScanQueue) {</span> |
| <span class="source-line-no">149</span><span id="line-149"> queueIndex = numWriteQueues + numReadQueues + scanBalancer.getNextQueue(callTask);</span> |
| <span class="source-line-no">150</span><span id="line-150"> } else {</span> |
| <span class="source-line-no">151</span><span id="line-151"> queueIndex = numWriteQueues + readBalancer.getNextQueue(callTask);</span> |
| <span class="source-line-no">152</span><span id="line-152"> }</span> |
| <span class="source-line-no">153</span><span id="line-153"> Queue<CallRunner> queue = queues.get(queueIndex);</span> |
| <span class="source-line-no">154</span><span id="line-154"> if (queue.size() >= currentQueueLimit) {</span> |
| <span class="source-line-no">155</span><span id="line-155"> return false;</span> |
| <span class="source-line-no">156</span><span id="line-156"> }</span> |
| <span class="source-line-no">157</span><span id="line-157"> return queue.offer(callTask);</span> |
| <span class="source-line-no">158</span><span id="line-158"> }</span> |
| <span class="source-line-no">159</span><span id="line-159"></span> |
| <span class="source-line-no">160</span><span id="line-160"> @Override</span> |
| <span class="source-line-no">161</span><span id="line-161"> public int getWriteQueueLength() {</span> |
| <span class="source-line-no">162</span><span id="line-162"> int length = 0;</span> |
| <span class="source-line-no">163</span><span id="line-163"> for (int i = 0; i < numWriteQueues; i++) {</span> |
| <span class="source-line-no">164</span><span id="line-164"> length += queues.get(i).size();</span> |
| <span class="source-line-no">165</span><span id="line-165"> }</span> |
| <span class="source-line-no">166</span><span id="line-166"> return length;</span> |
| <span class="source-line-no">167</span><span id="line-167"> }</span> |
| <span class="source-line-no">168</span><span id="line-168"></span> |
| <span class="source-line-no">169</span><span id="line-169"> @Override</span> |
| <span class="source-line-no">170</span><span id="line-170"> public int getReadQueueLength() {</span> |
| <span class="source-line-no">171</span><span id="line-171"> int length = 0;</span> |
| <span class="source-line-no">172</span><span id="line-172"> for (int i = numWriteQueues; i < (numWriteQueues + numReadQueues); i++) {</span> |
| <span class="source-line-no">173</span><span id="line-173"> length += queues.get(i).size();</span> |
| <span class="source-line-no">174</span><span id="line-174"> }</span> |
| <span class="source-line-no">175</span><span id="line-175"> return length;</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"> @Override</span> |
| <span class="source-line-no">179</span><span id="line-179"> public int getScanQueueLength() {</span> |
| <span class="source-line-no">180</span><span id="line-180"> int length = 0;</span> |
| <span class="source-line-no">181</span><span id="line-181"> for (int i = numWriteQueues + numReadQueues; i</span> |
| <span class="source-line-no">182</span><span id="line-182"> < (numWriteQueues + numReadQueues + numScanQueues); i++) {</span> |
| <span class="source-line-no">183</span><span id="line-183"> length += queues.get(i).size();</span> |
| <span class="source-line-no">184</span><span id="line-184"> }</span> |
| <span class="source-line-no">185</span><span id="line-185"> return length;</span> |
| <span class="source-line-no">186</span><span id="line-186"> }</span> |
| <span class="source-line-no">187</span><span id="line-187"></span> |
| <span class="source-line-no">188</span><span id="line-188"> @Override</span> |
| <span class="source-line-no">189</span><span id="line-189"> public int getActiveHandlerCount() {</span> |
| <span class="source-line-no">190</span><span id="line-190"> return activeWriteHandlerCount.get() + activeReadHandlerCount.get()</span> |
| <span class="source-line-no">191</span><span id="line-191"> + activeScanHandlerCount.get();</span> |
| <span class="source-line-no">192</span><span id="line-192"> }</span> |
| <span class="source-line-no">193</span><span id="line-193"></span> |
| <span class="source-line-no">194</span><span id="line-194"> @Override</span> |
| <span class="source-line-no">195</span><span id="line-195"> public int getActiveWriteHandlerCount() {</span> |
| <span class="source-line-no">196</span><span id="line-196"> return activeWriteHandlerCount.get();</span> |
| <span class="source-line-no">197</span><span id="line-197"> }</span> |
| <span class="source-line-no">198</span><span id="line-198"></span> |
| <span class="source-line-no">199</span><span id="line-199"> @Override</span> |
| <span class="source-line-no">200</span><span id="line-200"> public int getActiveReadHandlerCount() {</span> |
| <span class="source-line-no">201</span><span id="line-201"> return activeReadHandlerCount.get();</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 int getActiveScanHandlerCount() {</span> |
| <span class="source-line-no">206</span><span id="line-206"> return activeScanHandlerCount.get();</span> |
| <span class="source-line-no">207</span><span id="line-207"> }</span> |
| <span class="source-line-no">208</span><span id="line-208"></span> |
| <span class="source-line-no">209</span><span id="line-209"> protected boolean isWriteRequest(final RequestHeader header, final Message param) {</span> |
| <span class="source-line-no">210</span><span id="line-210"> // TODO: Is there a better way to do this?</span> |
| <span class="source-line-no">211</span><span id="line-211"> if (param instanceof MultiRequest) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> MultiRequest multi = (MultiRequest) param;</span> |
| <span class="source-line-no">213</span><span id="line-213"> for (RegionAction regionAction : multi.getRegionActionList()) {</span> |
| <span class="source-line-no">214</span><span id="line-214"> for (Action action : regionAction.getActionList()) {</span> |
| <span class="source-line-no">215</span><span id="line-215"> if (action.hasMutation()) {</span> |
| <span class="source-line-no">216</span><span id="line-216"> return true;</span> |
| <span class="source-line-no">217</span><span id="line-217"> }</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"> }</span> |
| <span class="source-line-no">221</span><span id="line-221"> if (param instanceof MutateRequest) {</span> |
| <span class="source-line-no">222</span><span id="line-222"> return true;</span> |
| <span class="source-line-no">223</span><span id="line-223"> }</span> |
| <span class="source-line-no">224</span><span id="line-224"> // Below here are methods for master. It's a pretty brittle version of this.</span> |
| <span class="source-line-no">225</span><span id="line-225"> // Not sure that master actually needs a read/write queue since 90% of requests to</span> |
| <span class="source-line-no">226</span><span id="line-226"> // master are writing to status or changing the meta table.</span> |
| <span class="source-line-no">227</span><span id="line-227"> // All other read requests are admin generated and can be processed whenever.</span> |
| <span class="source-line-no">228</span><span id="line-228"> // However changing that would require a pretty drastic change and should be done for</span> |
| <span class="source-line-no">229</span><span id="line-229"> // the next major release and not as a fix for HBASE-14239</span> |
| <span class="source-line-no">230</span><span id="line-230"> if (param instanceof RegionServerStatusProtos.ReportRegionStateTransitionRequest) {</span> |
| <span class="source-line-no">231</span><span id="line-231"> return true;</span> |
| <span class="source-line-no">232</span><span id="line-232"> }</span> |
| <span class="source-line-no">233</span><span id="line-233"> if (param instanceof RegionServerStatusProtos.RegionServerStartupRequest) {</span> |
| <span class="source-line-no">234</span><span id="line-234"> return true;</span> |
| <span class="source-line-no">235</span><span id="line-235"> }</span> |
| <span class="source-line-no">236</span><span id="line-236"> if (param instanceof RegionServerStatusProtos.RegionServerReportRequest) {</span> |
| <span class="source-line-no">237</span><span id="line-237"> return true;</span> |
| <span class="source-line-no">238</span><span id="line-238"> }</span> |
| <span class="source-line-no">239</span><span id="line-239"> return false;</span> |
| <span class="source-line-no">240</span><span id="line-240"> }</span> |
| <span class="source-line-no">241</span><span id="line-241"></span> |
| <span class="source-line-no">242</span><span id="line-242"> QueueBalancer getWriteBalancer() {</span> |
| <span class="source-line-no">243</span><span id="line-243"> return writeBalancer;</span> |
| <span class="source-line-no">244</span><span id="line-244"> }</span> |
| <span class="source-line-no">245</span><span id="line-245"></span> |
| <span class="source-line-no">246</span><span id="line-246"> QueueBalancer getReadBalancer() {</span> |
| <span class="source-line-no">247</span><span id="line-247"> return readBalancer;</span> |
| <span class="source-line-no">248</span><span id="line-248"> }</span> |
| <span class="source-line-no">249</span><span id="line-249"></span> |
| <span class="source-line-no">250</span><span id="line-250"> QueueBalancer getScanBalancer() {</span> |
| <span class="source-line-no">251</span><span id="line-251"> return scanBalancer;</span> |
| <span class="source-line-no">252</span><span id="line-252"> }</span> |
| <span class="source-line-no">253</span><span id="line-253"></span> |
| <span class="source-line-no">254</span><span id="line-254"> private boolean isScanRequest(final RequestHeader header, final Message param) {</span> |
| <span class="source-line-no">255</span><span id="line-255"> return param instanceof ScanRequest;</span> |
| <span class="source-line-no">256</span><span id="line-256"> }</span> |
| <span class="source-line-no">257</span><span id="line-257"></span> |
| <span class="source-line-no">258</span><span id="line-258"> protected boolean shouldDispatchToScanQueue(final CallRunner task) {</span> |
| <span class="source-line-no">259</span><span id="line-259"> RpcCall call = task.getRpcCall();</span> |
| <span class="source-line-no">260</span><span id="line-260"> return numScanQueues > 0 && isScanRequest(call.getHeader(), call.getParam());</span> |
| <span class="source-line-no">261</span><span id="line-261"> }</span> |
| <span class="source-line-no">262</span><span id="line-262"></span> |
| <span class="source-line-no">263</span><span id="line-263"> protected float getReadShare(final Configuration conf) {</span> |
| <span class="source-line-no">264</span><span id="line-264"> return conf.getFloat(CALL_QUEUE_READ_SHARE_CONF_KEY, 0);</span> |
| <span class="source-line-no">265</span><span id="line-265"> }</span> |
| <span class="source-line-no">266</span><span id="line-266"></span> |
| <span class="source-line-no">267</span><span id="line-267"> protected float getScanShare(final Configuration conf) {</span> |
| <span class="source-line-no">268</span><span id="line-268"> return conf.getFloat(CALL_QUEUE_SCAN_SHARE_CONF_KEY, 0);</span> |
| <span class="source-line-no">269</span><span id="line-269"> }</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"> * Calculate the number of writers based on the "total count" and the read share. You'll get at</span> |
| <span class="source-line-no">273</span><span id="line-273"> * least one writer.</span> |
| <span class="source-line-no">274</span><span id="line-274"> */</span> |
| <span class="source-line-no">275</span><span id="line-275"> private static int calcNumWriters(final int count, final float readShare) {</span> |
| <span class="source-line-no">276</span><span id="line-276"> return Math.max(1, count - Math.max(1, (int) Math.round(count * readShare)));</span> |
| <span class="source-line-no">277</span><span id="line-277"> }</span> |
| <span class="source-line-no">278</span><span id="line-278"></span> |
| <span class="source-line-no">279</span><span id="line-279"> /*</span> |
| <span class="source-line-no">280</span><span id="line-280"> * Calculate the number of readers based on the "total count" and the read share. You'll get at</span> |
| <span class="source-line-no">281</span><span id="line-281"> * least one reader.</span> |
| <span class="source-line-no">282</span><span id="line-282"> */</span> |
| <span class="source-line-no">283</span><span id="line-283"> private static int calcNumReaders(final int count, final float readShare) {</span> |
| <span class="source-line-no">284</span><span id="line-284"> return count - calcNumWriters(count, readShare);</span> |
| <span class="source-line-no">285</span><span id="line-285"> }</span> |
| <span class="source-line-no">286</span><span id="line-286"></span> |
| <span class="source-line-no">287</span><span id="line-287"> @Override</span> |
| <span class="source-line-no">288</span><span id="line-288"> public void onConfigurationChange(Configuration conf) {</span> |
| <span class="source-line-no">289</span><span id="line-289"> super.onConfigurationChange(conf);</span> |
| <span class="source-line-no">290</span><span id="line-290"> propagateBalancerConfigChange(writeBalancer, conf);</span> |
| <span class="source-line-no">291</span><span id="line-291"> propagateBalancerConfigChange(readBalancer, conf);</span> |
| <span class="source-line-no">292</span><span id="line-292"> propagateBalancerConfigChange(scanBalancer, conf);</span> |
| <span class="source-line-no">293</span><span id="line-293"> }</span> |
| <span class="source-line-no">294</span><span id="line-294"></span> |
| <span class="source-line-no">295</span><span id="line-295"> private void propagateBalancerConfigChange(QueueBalancer balancer, Configuration conf) {</span> |
| <span class="source-line-no">296</span><span id="line-296"> if (balancer instanceof ConfigurationObserver) {</span> |
| <span class="source-line-no">297</span><span id="line-297"> ((ConfigurationObserver) balancer).onConfigurationChange(conf);</span> |
| <span class="source-line-no">298</span><span id="line-298"> }</span> |
| <span class="source-line-no">299</span><span id="line-299"> }</span> |
| <span class="source-line-no">300</span><span id="line-300">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
