Repository: hbase-site Updated Branches: refs/heads/asf-site e78cb9d59 -> 50917b1d7
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/50917b1d/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/MasterProcedureQueue.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/MasterProcedureQueue.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/MasterProcedureQueue.html deleted file mode 100644 index 92dcb34..0000000 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/MasterProcedureQueue.html +++ /dev/null @@ -1,650 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd";> -<html lang="en"> -<head> -<title>Source code</title> -<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style"> -</head> -<body> -<div class="sourceContainer"> -<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> -<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> -<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> -<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> -<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> -<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> -<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> -<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> -<span class="sourceLineNo">009</span> *<a name="line.9"></a> -<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> -<span class="sourceLineNo">011</span> *<a name="line.11"></a> -<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> -<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> -<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> -<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> -<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> -<span class="sourceLineNo">017</span> */<a name="line.17"></a> -<span class="sourceLineNo">018</span><a name="line.18"></a> -<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.master.procedure;<a name="line.19"></a> -<span class="sourceLineNo">020</span><a name="line.20"></a> -<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> -<span class="sourceLineNo">022</span>import java.util.ArrayDeque;<a name="line.22"></a> -<span class="sourceLineNo">023</span>import java.util.Deque;<a name="line.23"></a> -<span class="sourceLineNo">024</span>import java.util.concurrent.locks.Condition;<a name="line.24"></a> -<span class="sourceLineNo">025</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.25"></a> -<span class="sourceLineNo">026</span><a name="line.26"></a> -<span class="sourceLineNo">027</span>import org.apache.commons.logging.Log;<a name="line.27"></a> -<span class="sourceLineNo">028</span>import org.apache.commons.logging.LogFactory;<a name="line.28"></a> -<span class="sourceLineNo">029</span>import org.apache.hadoop.conf.Configuration;<a name="line.29"></a> -<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.ServerName;<a name="line.30"></a> -<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.TableName;<a name="line.31"></a> -<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.TableExistsException;<a name="line.32"></a> -<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.TableNotFoundException;<a name="line.33"></a> -<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.34"></a> -<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.classification.InterfaceStability;<a name="line.35"></a> -<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.procedure2.Procedure;<a name="line.36"></a> -<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.procedure2.ProcedureFairRunQueues;<a name="line.37"></a> -<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.procedure2.ProcedureRunnableSet;<a name="line.38"></a> -<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.master.TableLockManager;<a name="line.39"></a> -<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.master.TableLockManager.TableLock;<a name="line.40"></a> -<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.master.procedure.TableProcedureInterface.TableOperationType;<a name="line.41"></a> -<span class="sourceLineNo">042</span><a name="line.42"></a> -<span class="sourceLineNo">043</span>/**<a name="line.43"></a> -<span class="sourceLineNo">044</span> * ProcedureRunnableSet for the Master Procedures.<a name="line.44"></a> -<span class="sourceLineNo">045</span> * This RunnableSet tries to provide to the ProcedureExecutor procedures<a name="line.45"></a> -<span class="sourceLineNo">046</span> * that can be executed without having to wait on a lock.<a name="line.46"></a> -<span class="sourceLineNo">047</span> * Most of the master operations can be executed concurrently, if they<a name="line.47"></a> -<span class="sourceLineNo">048</span> * are operating on different tables (e.g. two create table can be performed<a name="line.48"></a> -<span class="sourceLineNo">049</span> * at the same, time assuming table A and table B) or against two different servers; say<a name="line.49"></a> -<span class="sourceLineNo">050</span> * two servers that crashed at about the same time.<a name="line.50"></a> -<span class="sourceLineNo">051</span> *<a name="line.51"></a> -<span class="sourceLineNo">052</span> * <p>Each procedure should implement an interface providing information for this queue.<a name="line.52"></a> -<span class="sourceLineNo">053</span> * for example table related procedures should implement TableProcedureInterface.<a name="line.53"></a> -<span class="sourceLineNo">054</span> * each procedure will be pushed in its own queue, and based on the operation type<a name="line.54"></a> -<span class="sourceLineNo">055</span> * we may take smarter decision. e.g. we can abort all the operations preceding<a name="line.55"></a> -<span class="sourceLineNo">056</span> * a delete table, or similar.<a name="line.56"></a> -<span class="sourceLineNo">057</span> */<a name="line.57"></a> -<span class="sourceLineNo">058</span>@InterfaceAudience.Private<a name="line.58"></a> -<span class="sourceLineNo">059</span>@InterfaceStability.Evolving<a name="line.59"></a> -<span class="sourceLineNo">060</span>public class MasterProcedureQueue implements ProcedureRunnableSet {<a name="line.60"></a> -<span class="sourceLineNo">061</span> private static final Log LOG = LogFactory.getLog(MasterProcedureQueue.class);<a name="line.61"></a> -<span class="sourceLineNo">062</span><a name="line.62"></a> -<span class="sourceLineNo">063</span> // Two queues to ensure that server procedures run ahead of table precedures always.<a name="line.63"></a> -<span class="sourceLineNo">064</span> private final ProcedureFairRunQueues<TableName, RunQueue> tableFairQ;<a name="line.64"></a> -<span class="sourceLineNo">065</span> /**<a name="line.65"></a> -<span class="sourceLineNo">066</span> * Rely on basic fair q. ServerCrashProcedure will yield if meta is not assigned. This way, the<a name="line.66"></a> -<span class="sourceLineNo">067</span> * server that was carrying meta should rise to the top of the queue (this is how it used to<a name="line.67"></a> -<span class="sourceLineNo">068</span> * work when we had handlers and ServerShutdownHandler ran). TODO: special handling of servers<a name="line.68"></a> -<span class="sourceLineNo">069</span> * that were carrying system tables on crash; do I need to have these servers have priority?<a name="line.69"></a> -<span class="sourceLineNo">070</span> *<a name="line.70"></a> -<span class="sourceLineNo">071</span> * <p>Apart from the special-casing of meta and system tables, fairq is what we want<a name="line.71"></a> -<span class="sourceLineNo">072</span> */<a name="line.72"></a> -<span class="sourceLineNo">073</span> private final ProcedureFairRunQueues<ServerName, RunQueue> serverFairQ;<a name="line.73"></a> -<span class="sourceLineNo">074</span><a name="line.74"></a> -<span class="sourceLineNo">075</span> private final ReentrantLock lock = new ReentrantLock();<a name="line.75"></a> -<span class="sourceLineNo">076</span> private final Condition waitCond = lock.newCondition();<a name="line.76"></a> -<span class="sourceLineNo">077</span> private final TableLockManager lockManager;<a name="line.77"></a> -<span class="sourceLineNo">078</span><a name="line.78"></a> -<span class="sourceLineNo">079</span> private final int metaTablePriority;<a name="line.79"></a> -<span class="sourceLineNo">080</span> private final int userTablePriority;<a name="line.80"></a> -<span class="sourceLineNo">081</span> private final int sysTablePriority;<a name="line.81"></a> -<span class="sourceLineNo">082</span> private static final int DEFAULT_SERVER_PRIORITY = 1;<a name="line.82"></a> -<span class="sourceLineNo">083</span><a name="line.83"></a> -<span class="sourceLineNo">084</span> /**<a name="line.84"></a> -<span class="sourceLineNo">085</span> * Keeps count across server and table queues.<a name="line.85"></a> -<span class="sourceLineNo">086</span> */<a name="line.86"></a> -<span class="sourceLineNo">087</span> private int queueSize;<a name="line.87"></a> -<span class="sourceLineNo">088</span><a name="line.88"></a> -<span class="sourceLineNo">089</span> public MasterProcedureQueue(final Configuration conf, final TableLockManager lockManager) {<a name="line.89"></a> -<span class="sourceLineNo">090</span> this.tableFairQ = new ProcedureFairRunQueues<TableName, RunQueue>(1);<a name="line.90"></a> -<span class="sourceLineNo">091</span> this.serverFairQ = new ProcedureFairRunQueues<ServerName, RunQueue>(1);<a name="line.91"></a> -<span class="sourceLineNo">092</span> this.lockManager = lockManager;<a name="line.92"></a> -<span class="sourceLineNo">093</span><a name="line.93"></a> -<span class="sourceLineNo">094</span> // TODO: should this be part of the HTD?<a name="line.94"></a> -<span class="sourceLineNo">095</span> metaTablePriority = conf.getInt("hbase.master.procedure.queue.meta.table.priority", 3);<a name="line.95"></a> -<span class="sourceLineNo">096</span> sysTablePriority = conf.getInt("hbase.master.procedure.queue.system.table.priority", 2);<a name="line.96"></a> -<span class="sourceLineNo">097</span> userTablePriority = conf.getInt("hbase.master.procedure.queue.user.table.priority", 1);<a name="line.97"></a> -<span class="sourceLineNo">098</span> }<a name="line.98"></a> -<span class="sourceLineNo">099</span><a name="line.99"></a> -<span class="sourceLineNo">100</span> @Override<a name="line.100"></a> -<span class="sourceLineNo">101</span> public void addFront(final Procedure proc) {<a name="line.101"></a> -<span class="sourceLineNo">102</span> lock.lock();<a name="line.102"></a> -<span class="sourceLineNo">103</span> try {<a name="line.103"></a> -<span class="sourceLineNo">104</span> getRunQueueOrCreate(proc).addFront(proc);<a name="line.104"></a> -<span class="sourceLineNo">105</span> queueSize++;<a name="line.105"></a> -<span class="sourceLineNo">106</span> waitCond.signal();<a name="line.106"></a> -<span class="sourceLineNo">107</span> } finally {<a name="line.107"></a> -<span class="sourceLineNo">108</span> lock.unlock();<a name="line.108"></a> -<span class="sourceLineNo">109</span> }<a name="line.109"></a> -<span class="sourceLineNo">110</span> }<a name="line.110"></a> -<span class="sourceLineNo">111</span><a name="line.111"></a> -<span class="sourceLineNo">112</span> @Override<a name="line.112"></a> -<span class="sourceLineNo">113</span> public void addBack(final Procedure proc) {<a name="line.113"></a> -<span class="sourceLineNo">114</span> lock.lock();<a name="line.114"></a> -<span class="sourceLineNo">115</span> try {<a name="line.115"></a> -<span class="sourceLineNo">116</span> getRunQueueOrCreate(proc).addBack(proc);<a name="line.116"></a> -<span class="sourceLineNo">117</span> queueSize++;<a name="line.117"></a> -<span class="sourceLineNo">118</span> waitCond.signal();<a name="line.118"></a> -<span class="sourceLineNo">119</span> } finally {<a name="line.119"></a> -<span class="sourceLineNo">120</span> lock.unlock();<a name="line.120"></a> -<span class="sourceLineNo">121</span> }<a name="line.121"></a> -<span class="sourceLineNo">122</span> }<a name="line.122"></a> -<span class="sourceLineNo">123</span><a name="line.123"></a> -<span class="sourceLineNo">124</span> @Override<a name="line.124"></a> -<span class="sourceLineNo">125</span> public void yield(final Procedure proc) {<a name="line.125"></a> -<span class="sourceLineNo">126</span> addBack(proc);<a name="line.126"></a> -<span class="sourceLineNo">127</span> }<a name="line.127"></a> -<span class="sourceLineNo">128</span><a name="line.128"></a> -<span class="sourceLineNo">129</span> @Override<a name="line.129"></a> -<span class="sourceLineNo">130</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings("WA_AWAIT_NOT_IN_LOOP")<a name="line.130"></a> -<span class="sourceLineNo">131</span> public Long poll() {<a name="line.131"></a> -<span class="sourceLineNo">132</span> Long pollResult = null;<a name="line.132"></a> -<span class="sourceLineNo">133</span> lock.lock();<a name="line.133"></a> -<span class="sourceLineNo">134</span> try {<a name="line.134"></a> -<span class="sourceLineNo">135</span> if (queueSize == 0) {<a name="line.135"></a> -<span class="sourceLineNo">136</span> waitCond.await();<a name="line.136"></a> -<span class="sourceLineNo">137</span> if (queueSize == 0) {<a name="line.137"></a> -<span class="sourceLineNo">138</span> return null;<a name="line.138"></a> -<span class="sourceLineNo">139</span> }<a name="line.139"></a> -<span class="sourceLineNo">140</span> }<a name="line.140"></a> -<span class="sourceLineNo">141</span> // For now, let server handling have precedence over table handling; presumption is that it<a name="line.141"></a> -<span class="sourceLineNo">142</span> // is more important handling crashed servers than it is running the<a name="line.142"></a> -<span class="sourceLineNo">143</span> // enabling/disabling tables, etc.<a name="line.143"></a> -<span class="sourceLineNo">144</span> pollResult = doPoll(serverFairQ.poll());<a name="line.144"></a> -<span class="sourceLineNo">145</span> if (pollResult == null) {<a name="line.145"></a> -<span class="sourceLineNo">146</span> pollResult = doPoll(tableFairQ.poll());<a name="line.146"></a> -<span class="sourceLineNo">147</span> }<a name="line.147"></a> -<span class="sourceLineNo">148</span> } catch (InterruptedException e) {<a name="line.148"></a> -<span class="sourceLineNo">149</span> Thread.currentThread().interrupt();<a name="line.149"></a> -<span class="sourceLineNo">150</span> } finally {<a name="line.150"></a> -<span class="sourceLineNo">151</span> lock.unlock();<a name="line.151"></a> -<span class="sourceLineNo">152</span> }<a name="line.152"></a> -<span class="sourceLineNo">153</span> return pollResult;<a name="line.153"></a> -<span class="sourceLineNo">154</span> }<a name="line.154"></a> -<span class="sourceLineNo">155</span><a name="line.155"></a> -<span class="sourceLineNo">156</span> private Long doPoll(final RunQueue rq) {<a name="line.156"></a> -<span class="sourceLineNo">157</span> if (rq == null || !rq.isAvailable()) return null;<a name="line.157"></a> -<span class="sourceLineNo">158</span> this.queueSize--;<a name="line.158"></a> -<span class="sourceLineNo">159</span> return rq.poll();<a name="line.159"></a> -<span class="sourceLineNo">160</span> }<a name="line.160"></a> -<span class="sourceLineNo">161</span><a name="line.161"></a> -<span class="sourceLineNo">162</span> @Override<a name="line.162"></a> -<span class="sourceLineNo">163</span> public void signalAll() {<a name="line.163"></a> -<span class="sourceLineNo">164</span> lock.lock();<a name="line.164"></a> -<span class="sourceLineNo">165</span> try {<a name="line.165"></a> -<span class="sourceLineNo">166</span> waitCond.signalAll();<a name="line.166"></a> -<span class="sourceLineNo">167</span> } finally {<a name="line.167"></a> -<span class="sourceLineNo">168</span> lock.unlock();<a name="line.168"></a> -<span class="sourceLineNo">169</span> }<a name="line.169"></a> -<span class="sourceLineNo">170</span> }<a name="line.170"></a> -<span class="sourceLineNo">171</span><a name="line.171"></a> -<span class="sourceLineNo">172</span> @Override<a name="line.172"></a> -<span class="sourceLineNo">173</span> public void clear() {<a name="line.173"></a> -<span class="sourceLineNo">174</span> lock.lock();<a name="line.174"></a> -<span class="sourceLineNo">175</span> try {<a name="line.175"></a> -<span class="sourceLineNo">176</span> serverFairQ.clear();<a name="line.176"></a> -<span class="sourceLineNo">177</span> tableFairQ.clear();<a name="line.177"></a> -<span class="sourceLineNo">178</span> queueSize = 0;<a name="line.178"></a> -<span class="sourceLineNo">179</span> } finally {<a name="line.179"></a> -<span class="sourceLineNo">180</span> lock.unlock();<a name="line.180"></a> -<span class="sourceLineNo">181</span> }<a name="line.181"></a> -<span class="sourceLineNo">182</span> }<a name="line.182"></a> -<span class="sourceLineNo">183</span><a name="line.183"></a> -<span class="sourceLineNo">184</span> @Override<a name="line.184"></a> -<span class="sourceLineNo">185</span> public int size() {<a name="line.185"></a> -<span class="sourceLineNo">186</span> lock.lock();<a name="line.186"></a> -<span class="sourceLineNo">187</span> try {<a name="line.187"></a> -<span class="sourceLineNo">188</span> return queueSize;<a name="line.188"></a> -<span class="sourceLineNo">189</span> } finally {<a name="line.189"></a> -<span class="sourceLineNo">190</span> lock.unlock();<a name="line.190"></a> -<span class="sourceLineNo">191</span> }<a name="line.191"></a> -<span class="sourceLineNo">192</span> }<a name="line.192"></a> -<span class="sourceLineNo">193</span><a name="line.193"></a> -<span class="sourceLineNo">194</span> @Override<a name="line.194"></a> -<span class="sourceLineNo">195</span> public String toString() {<a name="line.195"></a> -<span class="sourceLineNo">196</span> lock.lock();<a name="line.196"></a> -<span class="sourceLineNo">197</span> try {<a name="line.197"></a> -<span class="sourceLineNo">198</span> return "MasterProcedureQueue size=" + queueSize + ": tableFairQ: " + tableFairQ +<a name="line.198"></a> -<span class="sourceLineNo">199</span> ", serverFairQ: " + serverFairQ;<a name="line.199"></a> -<span class="sourceLineNo">200</span> } finally {<a name="line.200"></a> -<span class="sourceLineNo">201</span> lock.unlock();<a name="line.201"></a> -<span class="sourceLineNo">202</span> }<a name="line.202"></a> -<span class="sourceLineNo">203</span> }<a name="line.203"></a> -<span class="sourceLineNo">204</span><a name="line.204"></a> -<span class="sourceLineNo">205</span> @Override<a name="line.205"></a> -<span class="sourceLineNo">206</span> public void completionCleanup(Procedure proc) {<a name="line.206"></a> -<span class="sourceLineNo">207</span> if (proc instanceof TableProcedureInterface) {<a name="line.207"></a> -<span class="sourceLineNo">208</span> TableProcedureInterface iProcTable = (TableProcedureInterface)proc;<a name="line.208"></a> -<span class="sourceLineNo">209</span> boolean tableDeleted;<a name="line.209"></a> -<span class="sourceLineNo">210</span> if (proc.hasException()) {<a name="line.210"></a> -<span class="sourceLineNo">211</span> IOException procEx = proc.getException().unwrapRemoteException();<a name="line.211"></a> -<span class="sourceLineNo">212</span> if (iProcTable.getTableOperationType() == TableOperationType.CREATE) {<a name="line.212"></a> -<span class="sourceLineNo">213</span> // create failed because the table already exist<a name="line.213"></a> -<span class="sourceLineNo">214</span> tableDeleted = !(procEx instanceof TableExistsException);<a name="line.214"></a> -<span class="sourceLineNo">215</span> } else {<a name="line.215"></a> -<span class="sourceLineNo">216</span> // the operation failed because the table does not exist<a name="line.216"></a> -<span class="sourceLineNo">217</span> tableDeleted = (procEx instanceof TableNotFoundException);<a name="line.217"></a> -<span class="sourceLineNo">218</span> }<a name="line.218"></a> -<span class="sourceLineNo">219</span> } else {<a name="line.219"></a> -<span class="sourceLineNo">220</span> // the table was deleted<a name="line.220"></a> -<span class="sourceLineNo">221</span> tableDeleted = (iProcTable.getTableOperationType() == TableOperationType.DELETE);<a name="line.221"></a> -<span class="sourceLineNo">222</span> }<a name="line.222"></a> -<span class="sourceLineNo">223</span> if (tableDeleted) {<a name="line.223"></a> -<span class="sourceLineNo">224</span> markTableAsDeleted(iProcTable.getTableName());<a name="line.224"></a> -<span class="sourceLineNo">225</span> }<a name="line.225"></a> -<span class="sourceLineNo">226</span> }<a name="line.226"></a> -<span class="sourceLineNo">227</span> // No cleanup for ServerProcedureInterface types, yet.<a name="line.227"></a> -<span class="sourceLineNo">228</span> }<a name="line.228"></a> -<span class="sourceLineNo">229</span><a name="line.229"></a> -<span class="sourceLineNo">230</span> private RunQueue getRunQueueOrCreate(final Procedure proc) {<a name="line.230"></a> -<span class="sourceLineNo">231</span> if (proc instanceof TableProcedureInterface) {<a name="line.231"></a> -<span class="sourceLineNo">232</span> final TableName table = ((TableProcedureInterface)proc).getTableName();<a name="line.232"></a> -<span class="sourceLineNo">233</span> return getRunQueueOrCreate(table);<a name="line.233"></a> -<span class="sourceLineNo">234</span> }<a name="line.234"></a> -<span class="sourceLineNo">235</span> if (proc instanceof ServerProcedureInterface) {<a name="line.235"></a> -<span class="sourceLineNo">236</span> return getRunQueueOrCreate((ServerProcedureInterface)proc);<a name="line.236"></a> -<span class="sourceLineNo">237</span> }<a name="line.237"></a> -<span class="sourceLineNo">238</span> // TODO: at the moment we only have Table and Server procedures<a name="line.238"></a> -<span class="sourceLineNo">239</span> // if you are implementing a non-table/non-server procedure, you have two options: create<a name="line.239"></a> -<span class="sourceLineNo">240</span> // a group for all the non-table/non-server procedures or try to find a key for your<a name="line.240"></a> -<span class="sourceLineNo">241</span> // non-table/non-server procedures and implement something similar to the TableRunQueue.<a name="line.241"></a> -<span class="sourceLineNo">242</span> throw new UnsupportedOperationException("RQs for non-table procedures are not implemented yet");<a name="line.242"></a> -<span class="sourceLineNo">243</span> }<a name="line.243"></a> -<span class="sourceLineNo">244</span><a name="line.244"></a> -<span class="sourceLineNo">245</span> private TableRunQueue getRunQueueOrCreate(final TableName table) {<a name="line.245"></a> -<span class="sourceLineNo">246</span> final TableRunQueue queue = getRunQueue(table);<a name="line.246"></a> -<span class="sourceLineNo">247</span> if (queue != null) return queue;<a name="line.247"></a> -<span class="sourceLineNo">248</span> return (TableRunQueue)tableFairQ.add(table, createTableRunQueue(table));<a name="line.248"></a> -<span class="sourceLineNo">249</span> }<a name="line.249"></a> -<span class="sourceLineNo">250</span><a name="line.250"></a> -<span class="sourceLineNo">251</span> private ServerRunQueue getRunQueueOrCreate(final ServerProcedureInterface spi) {<a name="line.251"></a> -<span class="sourceLineNo">252</span> final ServerRunQueue queue = getRunQueue(spi.getServerName());<a name="line.252"></a> -<span class="sourceLineNo">253</span> if (queue != null) return queue;<a name="line.253"></a> -<span class="sourceLineNo">254</span> return (ServerRunQueue)serverFairQ.add(spi.getServerName(), createServerRunQueue(spi));<a name="line.254"></a> -<span class="sourceLineNo">255</span> }<a name="line.255"></a> -<span class="sourceLineNo">256</span><a name="line.256"></a> -<span class="sourceLineNo">257</span> private TableRunQueue createTableRunQueue(final TableName table) {<a name="line.257"></a> -<span class="sourceLineNo">258</span> int priority = userTablePriority;<a name="line.258"></a> -<span class="sourceLineNo">259</span> if (table.equals(TableName.META_TABLE_NAME)) {<a name="line.259"></a> -<span class="sourceLineNo">260</span> priority = metaTablePriority;<a name="line.260"></a> -<span class="sourceLineNo">261</span> } else if (table.isSystemTable()) {<a name="line.261"></a> -<span class="sourceLineNo">262</span> priority = sysTablePriority;<a name="line.262"></a> -<span class="sourceLineNo">263</span> }<a name="line.263"></a> -<span class="sourceLineNo">264</span> return new TableRunQueue(priority);<a name="line.264"></a> -<span class="sourceLineNo">265</span> }<a name="line.265"></a> -<span class="sourceLineNo">266</span><a name="line.266"></a> -<span class="sourceLineNo">267</span> private ServerRunQueue createServerRunQueue(final ServerProcedureInterface spi) {<a name="line.267"></a> -<span class="sourceLineNo">268</span> return new ServerRunQueue(DEFAULT_SERVER_PRIORITY);<a name="line.268"></a> -<span class="sourceLineNo">269</span> }<a name="line.269"></a> -<span class="sourceLineNo">270</span><a name="line.270"></a> -<span class="sourceLineNo">271</span> private TableRunQueue getRunQueue(final TableName table) {<a name="line.271"></a> -<span class="sourceLineNo">272</span> return (TableRunQueue)tableFairQ.get(table);<a name="line.272"></a> -<span class="sourceLineNo">273</span> }<a name="line.273"></a> -<span class="sourceLineNo">274</span><a name="line.274"></a> -<span class="sourceLineNo">275</span> private ServerRunQueue getRunQueue(final ServerName sn) {<a name="line.275"></a> -<span class="sourceLineNo">276</span> return (ServerRunQueue)serverFairQ.get(sn);<a name="line.276"></a> -<span class="sourceLineNo">277</span> }<a name="line.277"></a> -<span class="sourceLineNo">278</span><a name="line.278"></a> -<span class="sourceLineNo">279</span> /**<a name="line.279"></a> -<span class="sourceLineNo">280</span> * Try to acquire the write lock on the specified table.<a name="line.280"></a> -<span class="sourceLineNo">281</span> * other operations in the table-queue will be executed after the lock is released.<a name="line.281"></a> -<span class="sourceLineNo">282</span> * @param table Table to lock<a name="line.282"></a> -<span class="sourceLineNo">283</span> * @param purpose Human readable reason for locking the table<a name="line.283"></a> -<span class="sourceLineNo">284</span> * @return true if we were able to acquire the lock on the table, otherwise false.<a name="line.284"></a> -<span class="sourceLineNo">285</span> */<a name="line.285"></a> -<span class="sourceLineNo">286</span> public boolean tryAcquireTableExclusiveLock(final TableName table, final String purpose) {<a name="line.286"></a> -<span class="sourceLineNo">287</span> return getRunQueueOrCreate(table).tryExclusiveLock(lockManager, table, purpose);<a name="line.287"></a> -<span class="sourceLineNo">288</span> }<a name="line.288"></a> -<span class="sourceLineNo">289</span><a name="line.289"></a> -<span class="sourceLineNo">290</span> /**<a name="line.290"></a> -<span class="sourceLineNo">291</span> * Release the write lock taken with tryAcquireTableWrite()<a name="line.291"></a> -<span class="sourceLineNo">292</span> * @param table the name of the table that has the write lock<a name="line.292"></a> -<span class="sourceLineNo">293</span> */<a name="line.293"></a> -<span class="sourceLineNo">294</span> public void releaseTableExclusiveLock(final TableName table) {<a name="line.294"></a> -<span class="sourceLineNo">295</span> getRunQueue(table).releaseExclusiveLock(lockManager, table);<a name="line.295"></a> -<span class="sourceLineNo">296</span> }<a name="line.296"></a> -<span class="sourceLineNo">297</span><a name="line.297"></a> -<span class="sourceLineNo">298</span> /**<a name="line.298"></a> -<span class="sourceLineNo">299</span> * Try to acquire the read lock on the specified table.<a name="line.299"></a> -<span class="sourceLineNo">300</span> * other read operations in the table-queue may be executed concurrently,<a name="line.300"></a> -<span class="sourceLineNo">301</span> * otherwise they have to wait until all the read-locks are released.<a name="line.301"></a> -<span class="sourceLineNo">302</span> * @param table Table to lock<a name="line.302"></a> -<span class="sourceLineNo">303</span> * @param purpose Human readable reason for locking the table<a name="line.303"></a> -<span class="sourceLineNo">304</span> * @return true if we were able to acquire the lock on the table, otherwise false.<a name="line.304"></a> -<span class="sourceLineNo">305</span> */<a name="line.305"></a> -<span class="sourceLineNo">306</span> public boolean tryAcquireTableSharedLock(final TableName table, final String purpose) {<a name="line.306"></a> -<span class="sourceLineNo">307</span> return getRunQueueOrCreate(table).trySharedLock(lockManager, table, purpose);<a name="line.307"></a> -<span class="sourceLineNo">308</span> }<a name="line.308"></a> -<span class="sourceLineNo">309</span><a name="line.309"></a> -<span class="sourceLineNo">310</span> /**<a name="line.310"></a> -<span class="sourceLineNo">311</span> * Release the read lock taken with tryAcquireTableRead()<a name="line.311"></a> -<span class="sourceLineNo">312</span> * @param table the name of the table that has the read lock<a name="line.312"></a> -<span class="sourceLineNo">313</span> */<a name="line.313"></a> -<span class="sourceLineNo">314</span> public void releaseTableSharedLock(final TableName table) {<a name="line.314"></a> -<span class="sourceLineNo">315</span> getRunQueue(table).releaseSharedLock(lockManager, table);<a name="line.315"></a> -<span class="sourceLineNo">316</span> }<a name="line.316"></a> -<span class="sourceLineNo">317</span><a name="line.317"></a> -<span class="sourceLineNo">318</span> /**<a name="line.318"></a> -<span class="sourceLineNo">319</span> * Try to acquire the write lock on the specified server.<a name="line.319"></a> -<span class="sourceLineNo">320</span> * @see #releaseServerExclusiveLock(ServerProcedureInterface)<a name="line.320"></a> -<span class="sourceLineNo">321</span> * @param spi Server to lock<a name="line.321"></a> -<span class="sourceLineNo">322</span> * @return true if we were able to acquire the lock on the server, otherwise false.<a name="line.322"></a> -<span class="sourceLineNo">323</span> */<a name="line.323"></a> -<span class="sourceLineNo">324</span> public boolean tryAcquireServerExclusiveLock(final ServerProcedureInterface spi) {<a name="line.324"></a> -<span class="sourceLineNo">325</span> return getRunQueueOrCreate(spi).tryExclusiveLock();<a name="line.325"></a> -<span class="sourceLineNo">326</span> }<a name="line.326"></a> -<span class="sourceLineNo">327</span><a name="line.327"></a> -<span class="sourceLineNo">328</span> /**<a name="line.328"></a> -<span class="sourceLineNo">329</span> * Release the write lock<a name="line.329"></a> -<span class="sourceLineNo">330</span> * @see #tryAcquireServerExclusiveLock(ServerProcedureInterface)<a name="line.330"></a> -<span class="sourceLineNo">331</span> * @param spi the server that has the write lock<a name="line.331"></a> -<span class="sourceLineNo">332</span> */<a name="line.332"></a> -<span class="sourceLineNo">333</span> public void releaseServerExclusiveLock(final ServerProcedureInterface spi) {<a name="line.333"></a> -<span class="sourceLineNo">334</span> getRunQueue(spi.getServerName()).releaseExclusiveLock();<a name="line.334"></a> -<span class="sourceLineNo">335</span> }<a name="line.335"></a> -<span class="sourceLineNo">336</span><a name="line.336"></a> -<span class="sourceLineNo">337</span> /**<a name="line.337"></a> -<span class="sourceLineNo">338</span> * Try to acquire the read lock on the specified server.<a name="line.338"></a> -<span class="sourceLineNo">339</span> * @see #releaseServerSharedLock(ServerProcedureInterface)<a name="line.339"></a> -<span class="sourceLineNo">340</span> * @param spi Server to lock<a name="line.340"></a> -<span class="sourceLineNo">341</span> * @return true if we were able to acquire the lock on the server, otherwise false.<a name="line.341"></a> -<span class="sourceLineNo">342</span> */<a name="line.342"></a> -<span class="sourceLineNo">343</span> public boolean tryAcquireServerSharedLock(final ServerProcedureInterface spi) {<a name="line.343"></a> -<span class="sourceLineNo">344</span> return getRunQueueOrCreate(spi).trySharedLock();<a name="line.344"></a> -<span class="sourceLineNo">345</span> }<a name="line.345"></a> -<span class="sourceLineNo">346</span><a name="line.346"></a> -<span class="sourceLineNo">347</span> /**<a name="line.347"></a> -<span class="sourceLineNo">348</span> * Release the read lock taken<a name="line.348"></a> -<span class="sourceLineNo">349</span> * @see #tryAcquireServerSharedLock(ServerProcedureInterface)<a name="line.349"></a> -<span class="sourceLineNo">350</span> * @param spi the server that has the read lock<a name="line.350"></a> -<span class="sourceLineNo">351</span> */<a name="line.351"></a> -<span class="sourceLineNo">352</span> public void releaseServerSharedLock(final ServerProcedureInterface spi) {<a name="line.352"></a> -<span class="sourceLineNo">353</span> getRunQueue(spi.getServerName()).releaseSharedLock();<a name="line.353"></a> -<span class="sourceLineNo">354</span> }<a name="line.354"></a> -<span class="sourceLineNo">355</span><a name="line.355"></a> -<span class="sourceLineNo">356</span> /**<a name="line.356"></a> -<span class="sourceLineNo">357</span> * Tries to remove the queue and the table-lock of the specified table.<a name="line.357"></a> -<span class="sourceLineNo">358</span> * If there are new operations pending (e.g. a new create),<a name="line.358"></a> -<span class="sourceLineNo">359</span> * the remove 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class="sourceLineNo">369</span> if (queue.isEmpty() && queue.acquireDeleteLock()) {<a name="line.369"></a> -<span class="sourceLineNo">370</span> tableFairQ.remove(table);<a name="line.370"></a> -<span class="sourceLineNo">371</span><a name="line.371"></a> -<span class="sourceLineNo">372</span> // Remove the table lock<a name="line.372"></a> -<span class="sourceLineNo">373</span> try {<a name="line.373"></a> -<span class="sourceLineNo">374</span> lockManager.tableDeleted(table);<a name="line.374"></a> -<span class="sourceLineNo">375</span> } catch (IOException e) {<a name="line.375"></a> -<span class="sourceLineNo">376</span> LOG.warn("Received exception from TableLockManager.tableDeleted:", e); //not critical<a name="line.376"></a> -<span class="sourceLineNo">377</span> }<a name="line.377"></a> -<span class="sourceLineNo">378</span> } else {<a name="line.378"></a> -<span class="sourceLineNo">379</span> // TODO: If there are no create, we can drop all the other ops<a 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