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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.namequeues.impl;</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.Arrays;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.Collections;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.List;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.Queue;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.stream.Collectors;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.client.BalancerDecision;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.client.Connection;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.namequeues.BalancerDecisionDetails;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.namequeues.NamedQueuePayload;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.namequeues.NamedQueueService;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.namequeues.request.NamedQueueGetRequest;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.namequeues.response.NamedQueueGetResponse;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.slf4j.Logger;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">037</span><span id="line-37"></span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hbase.thirdparty.com.google.common.collect.EvictingQueue;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hbase.thirdparty.com.google.common.collect.Lists;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hbase.thirdparty.com.google.common.collect.Queues;</span> |
| <span class="source-line-no">041</span><span id="line-41"></span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.shaded.protobuf.generated.RecentLogs;</span> |
| <span class="source-line-no">043</span><span id="line-43"></span> |
| <span class="source-line-no">044</span><span id="line-44">/**</span> |
| <span class="source-line-no">045</span><span id="line-45"> * In-memory Queue service provider for Balancer Decision events</span> |
| <span class="source-line-no">046</span><span id="line-46"> */</span> |
| <span class="source-line-no">047</span><span id="line-47">@InterfaceAudience.Private</span> |
| <span class="source-line-no">048</span><span id="line-48">public class BalancerDecisionQueueService implements NamedQueueService {</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> private static final Logger LOG = LoggerFactory.getLogger(BalancerDecisionQueueService.class);</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> private final boolean isBalancerDecisionRecording;</span> |
| <span class="source-line-no">053</span><span id="line-53"></span> |
| <span class="source-line-no">054</span><span id="line-54"> private static final String BALANCER_DECISION_QUEUE_SIZE =</span> |
| <span class="source-line-no">055</span><span id="line-55"> "hbase.master.balancer.decision.queue.size";</span> |
| <span class="source-line-no">056</span><span id="line-56"> private static final int DEFAULT_BALANCER_DECISION_QUEUE_SIZE = 250;</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58"> private static final int REGION_PLANS_THRESHOLD_PER_BALANCER = 15;</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60"> private final Queue<RecentLogs.BalancerDecision> balancerDecisionQueue;</span> |
| <span class="source-line-no">061</span><span id="line-61"></span> |
| <span class="source-line-no">062</span><span id="line-62"> public BalancerDecisionQueueService(Configuration conf) {</span> |
| <span class="source-line-no">063</span><span id="line-63"> isBalancerDecisionRecording = conf.getBoolean(BaseLoadBalancer.BALANCER_DECISION_BUFFER_ENABLED,</span> |
| <span class="source-line-no">064</span><span id="line-64"> BaseLoadBalancer.DEFAULT_BALANCER_DECISION_BUFFER_ENABLED);</span> |
| <span class="source-line-no">065</span><span id="line-65"> if (!isBalancerDecisionRecording) {</span> |
| <span class="source-line-no">066</span><span id="line-66"> balancerDecisionQueue = null;</span> |
| <span class="source-line-no">067</span><span id="line-67"> return;</span> |
| <span class="source-line-no">068</span><span id="line-68"> }</span> |
| <span class="source-line-no">069</span><span id="line-69"> final int queueSize =</span> |
| <span class="source-line-no">070</span><span id="line-70"> conf.getInt(BALANCER_DECISION_QUEUE_SIZE, DEFAULT_BALANCER_DECISION_QUEUE_SIZE);</span> |
| <span class="source-line-no">071</span><span id="line-71"> final EvictingQueue<RecentLogs.BalancerDecision> evictingQueue =</span> |
| <span class="source-line-no">072</span><span id="line-72"> EvictingQueue.create(queueSize);</span> |
| <span class="source-line-no">073</span><span id="line-73"> balancerDecisionQueue = Queues.synchronizedQueue(evictingQueue);</span> |
| <span class="source-line-no">074</span><span id="line-74"> }</span> |
| <span class="source-line-no">075</span><span id="line-75"></span> |
| <span class="source-line-no">076</span><span id="line-76"> @Override</span> |
| <span class="source-line-no">077</span><span id="line-77"> public NamedQueuePayload.NamedQueueEvent getEvent() {</span> |
| <span class="source-line-no">078</span><span id="line-78"> return NamedQueuePayload.NamedQueueEvent.BALANCE_DECISION;</span> |
| <span class="source-line-no">079</span><span id="line-79"> }</span> |
| <span class="source-line-no">080</span><span id="line-80"></span> |
| <span class="source-line-no">081</span><span id="line-81"> @Override</span> |
| <span class="source-line-no">082</span><span id="line-82"> public void consumeEventFromDisruptor(NamedQueuePayload namedQueuePayload) {</span> |
| <span class="source-line-no">083</span><span id="line-83"> if (!isBalancerDecisionRecording) {</span> |
| <span class="source-line-no">084</span><span id="line-84"> return;</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 (!(namedQueuePayload instanceof BalancerDecisionDetails)) {</span> |
| <span class="source-line-no">087</span><span id="line-87"> LOG.warn(</span> |
| <span class="source-line-no">088</span><span id="line-88"> "BalancerDecisionQueueService: NamedQueuePayload is not of type BalancerDecisionDetails.");</span> |
| <span class="source-line-no">089</span><span id="line-89"> return;</span> |
| <span class="source-line-no">090</span><span id="line-90"> }</span> |
| <span class="source-line-no">091</span><span id="line-91"> BalancerDecisionDetails balancerDecisionDetails = (BalancerDecisionDetails) namedQueuePayload;</span> |
| <span class="source-line-no">092</span><span id="line-92"> BalancerDecision balancerDecisionRecords = balancerDecisionDetails.getBalancerDecision();</span> |
| <span class="source-line-no">093</span><span id="line-93"> List<String> regionPlans = balancerDecisionRecords.getRegionPlans();</span> |
| <span class="source-line-no">094</span><span id="line-94"> List<List<String>> regionPlansList;</span> |
| <span class="source-line-no">095</span><span id="line-95"> if (regionPlans.size() > REGION_PLANS_THRESHOLD_PER_BALANCER) {</span> |
| <span class="source-line-no">096</span><span id="line-96"> regionPlansList = Lists.partition(regionPlans, REGION_PLANS_THRESHOLD_PER_BALANCER);</span> |
| <span class="source-line-no">097</span><span id="line-97"> } else {</span> |
| <span class="source-line-no">098</span><span id="line-98"> regionPlansList = Collections.singletonList(regionPlans);</span> |
| <span class="source-line-no">099</span><span id="line-99"> }</span> |
| <span class="source-line-no">100</span><span id="line-100"> for (List<String> regionPlansPerBalancer : regionPlansList) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> RecentLogs.BalancerDecision balancerDecision = RecentLogs.BalancerDecision.newBuilder()</span> |
| <span class="source-line-no">102</span><span id="line-102"> .setInitTotalCost(balancerDecisionRecords.getInitTotalCost())</span> |
| <span class="source-line-no">103</span><span id="line-103"> .setInitialFunctionCosts(balancerDecisionRecords.getInitialFunctionCosts())</span> |
| <span class="source-line-no">104</span><span id="line-104"> .setComputedTotalCost(balancerDecisionRecords.getComputedTotalCost())</span> |
| <span class="source-line-no">105</span><span id="line-105"> .setFinalFunctionCosts(balancerDecisionRecords.getFinalFunctionCosts())</span> |
| <span class="source-line-no">106</span><span id="line-106"> .setComputedSteps(balancerDecisionRecords.getComputedSteps())</span> |
| <span class="source-line-no">107</span><span id="line-107"> .addAllRegionPlans(regionPlansPerBalancer).build();</span> |
| <span class="source-line-no">108</span><span id="line-108"> balancerDecisionQueue.add(balancerDecision);</span> |
| <span class="source-line-no">109</span><span id="line-109"> }</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"> @Override</span> |
| <span class="source-line-no">113</span><span id="line-113"> public boolean clearNamedQueue() {</span> |
| <span class="source-line-no">114</span><span id="line-114"> if (!isBalancerDecisionRecording) {</span> |
| <span class="source-line-no">115</span><span id="line-115"> return false;</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117"> LOG.debug("Received request to clean up balancer decision queue.");</span> |
| <span class="source-line-no">118</span><span id="line-118"> balancerDecisionQueue.clear();</span> |
| <span class="source-line-no">119</span><span id="line-119"> return true;</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"> @Override</span> |
| <span class="source-line-no">123</span><span id="line-123"> public NamedQueueGetResponse getNamedQueueRecords(NamedQueueGetRequest request) {</span> |
| <span class="source-line-no">124</span><span id="line-124"> if (!isBalancerDecisionRecording) {</span> |
| <span class="source-line-no">125</span><span id="line-125"> return null;</span> |
| <span class="source-line-no">126</span><span id="line-126"> }</span> |
| <span class="source-line-no">127</span><span id="line-127"> List<RecentLogs.BalancerDecision> balancerDecisions =</span> |
| <span class="source-line-no">128</span><span id="line-128"> Arrays.stream(balancerDecisionQueue.toArray(new RecentLogs.BalancerDecision[0]))</span> |
| <span class="source-line-no">129</span><span id="line-129"> .collect(Collectors.toList());</span> |
| <span class="source-line-no">130</span><span id="line-130"> // latest records should be displayed first, hence reverse order sorting</span> |
| <span class="source-line-no">131</span><span id="line-131"> Collections.reverse(balancerDecisions);</span> |
| <span class="source-line-no">132</span><span id="line-132"> int limit = balancerDecisions.size();</span> |
| <span class="source-line-no">133</span><span id="line-133"> if (request.getBalancerDecisionsRequest().hasLimit()) {</span> |
| <span class="source-line-no">134</span><span id="line-134"> limit = Math.min(request.getBalancerDecisionsRequest().getLimit(), balancerDecisions.size());</span> |
| <span class="source-line-no">135</span><span id="line-135"> }</span> |
| <span class="source-line-no">136</span><span id="line-136"> // filter limit if provided</span> |
| <span class="source-line-no">137</span><span id="line-137"> balancerDecisions = balancerDecisions.subList(0, limit);</span> |
| <span class="source-line-no">138</span><span id="line-138"> final NamedQueueGetResponse namedQueueGetResponse = new NamedQueueGetResponse();</span> |
| <span class="source-line-no">139</span><span id="line-139"> namedQueueGetResponse.setNamedQueueEvent(BalancerDecisionDetails.BALANCER_DECISION_EVENT);</span> |
| <span class="source-line-no">140</span><span id="line-140"> namedQueueGetResponse.setBalancerDecisions(balancerDecisions);</span> |
| <span class="source-line-no">141</span><span id="line-141"> return namedQueueGetResponse;</span> |
| <span class="source-line-no">142</span><span id="line-142"> }</span> |
| <span class="source-line-no">143</span><span id="line-143"></span> |
| <span class="source-line-no">144</span><span id="line-144"> @Override</span> |
| <span class="source-line-no">145</span><span id="line-145"> public void persistAll(Connection connection) {</span> |
| <span class="source-line-no">146</span><span id="line-146"> // no-op for now</span> |
| <span class="source-line-no">147</span><span id="line-147"> }</span> |
| <span class="source-line-no">148</span><span id="line-148"></span> |
| <span class="source-line-no">149</span><span id="line-149">}</span> |
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| </pre> |
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