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| <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>package org.apache.hadoop.hbase.master.locking;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.concurrent.CountDownLatch;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.concurrent.atomic.AtomicBoolean;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.conf.Configuration;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.TableName;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.master.procedure.TableProcedureInterface;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.procedure2.LockType;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.procedure2.Procedure;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.procedure2.ProcedureEvent;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.slf4j.Logger;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.slf4j.LoggerFactory;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.LockServiceProtos;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.LockServiceProtos.LockProcedureData;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span><a name="line.43"></a> |
| <span class="sourceLineNo">044</span>/**<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * Procedure to allow blessed clients and external admin tools to take our internal Schema locks<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * used by the procedure framework isolating procedures doing creates/deletes etc. on<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * table/namespace/regions. This procedure when scheduled, acquires specified locks, suspends itself<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * and waits for:<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * <ul><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * <li>Call to unlock: if lock request came from the process itself, say master chore.</li><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * <li>Timeout : if lock request came from RPC. On timeout, evaluates if it should continue holding<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * the lock or not based on last heartbeat timestamp.</li><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * </ul><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> */<a name="line.54"></a> |
| <span class="sourceLineNo">055</span>@InterfaceAudience.Private<a name="line.55"></a> |
| <span class="sourceLineNo">056</span>public final class LockProcedure extends Procedure<MasterProcedureEnv><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> implements TableProcedureInterface {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> private static final Logger LOG = LoggerFactory.getLogger(LockProcedure.class);<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> public static final int DEFAULT_REMOTE_LOCKS_TIMEOUT_MS = 30000; // timeout in ms<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> public static final String REMOTE_LOCKS_TIMEOUT_MS_CONF =<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> "hbase.master.procedure.remote.locks.timeout.ms";<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> // 10 min. Same as old ZK lock timeout.<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> public static final int DEFAULT_LOCAL_MASTER_LOCKS_TIMEOUT_MS = 600000;<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> public static final String LOCAL_MASTER_LOCKS_TIMEOUT_MS_CONF =<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> "hbase.master.procedure.local.master.locks.timeout.ms";<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> private String namespace;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> private TableName tableName;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> private RegionInfo[] regionInfos;<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> private LockType type;<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> // underlying namespace/table/region lock.<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> private LockInterface lock;<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> private TableOperationType opType;<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> private String description;<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> // True when recovery of master lock from WALs<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> private boolean recoveredMasterLock;<a name="line.77"></a> |
| <span class="sourceLineNo">078</span><a name="line.78"></a> |
| <span class="sourceLineNo">079</span> private final ProcedureEvent<LockProcedure> event = new ProcedureEvent<>(this);<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> // True if this proc acquired relevant locks. This value is for client checks.<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> private final AtomicBoolean locked = new AtomicBoolean(false);<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> // Last system time (in ms) when client sent the heartbeat.<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> // Initialize to system time for non-null value in case of recovery.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> private final AtomicLong lastHeartBeat = new AtomicLong();<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> // Set to true when unlock request is received.<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> private final AtomicBoolean unlock = new AtomicBoolean(false);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> // decreased when locks are acquired. Only used for local (with master process) purposes.<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> // Setting latch to non-null value increases default timeout to<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> // DEFAULT_LOCAL_MASTER_LOCKS_TIMEOUT_MS (10 min) so that there is no need to heartbeat.<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> private final CountDownLatch lockAcquireLatch;<a name="line.90"></a> |
| <span class="sourceLineNo">091</span><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> private volatile boolean suspended = false;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span><a name="line.93"></a> |
| <span class="sourceLineNo">094</span> @Override<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> public TableName getTableName() {<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> return tableName;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span><a name="line.98"></a> |
| <span class="sourceLineNo">099</span> @Override<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> public TableOperationType getTableOperationType() {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> return opType;<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span> private interface LockInterface {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> boolean acquireLock(MasterProcedureEnv env);<a name="line.105"></a> |
| <span class="sourceLineNo">106</span><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> void releaseLock(MasterProcedureEnv env);<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> public LockProcedure() {<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> lockAcquireLatch = null;<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> }<a name="line.112"></a> |
| <span class="sourceLineNo">113</span><a name="line.113"></a> |
| <span class="sourceLineNo">114</span> private LockProcedure(final Configuration conf, final LockType type, final String description,<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> final CountDownLatch lockAcquireLatch) {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> this.type = type;<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> this.description = description;<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> this.lockAcquireLatch = lockAcquireLatch;<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> if (lockAcquireLatch == null) {<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> setTimeout(conf.getInt(REMOTE_LOCKS_TIMEOUT_MS_CONF, DEFAULT_REMOTE_LOCKS_TIMEOUT_MS));<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> } else {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> setTimeout(<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> conf.getInt(LOCAL_MASTER_LOCKS_TIMEOUT_MS_CONF, DEFAULT_LOCAL_MASTER_LOCKS_TIMEOUT_MS));<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> }<a name="line.125"></a> |
| <span class="sourceLineNo">126</span><a name="line.126"></a> |
| <span class="sourceLineNo">127</span> /**<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> * Constructor for namespace lock.<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> * @param lockAcquireLatch if not null, the latch is decreased when lock is acquired.<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> */<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> public LockProcedure(final Configuration conf, final String namespace, final LockType type,<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> final String description, final CountDownLatch lockAcquireLatch)<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> throws IllegalArgumentException {<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> this(conf, type, description, lockAcquireLatch);<a name="line.134"></a> |
| <span class="sourceLineNo">135</span><a name="line.135"></a> |
| <span class="sourceLineNo">136</span> if (namespace.isEmpty()) {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> throw new IllegalArgumentException("Empty namespace");<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> this.namespace = namespace;<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> this.lock = setupNamespaceLock();<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> }<a name="line.142"></a> |
| <span class="sourceLineNo">143</span><a name="line.143"></a> |
| <span class="sourceLineNo">144</span> /**<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> * Constructor for table lock.<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> * @param lockAcquireLatch if not null, the latch is decreased when lock is acquired.<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> */<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> public LockProcedure(final Configuration conf, final TableName tableName, final LockType type,<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> final String description, final CountDownLatch lockAcquireLatch)<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> throws IllegalArgumentException {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> this(conf, type, description, lockAcquireLatch);<a name="line.151"></a> |
| <span class="sourceLineNo">152</span><a name="line.152"></a> |
| <span class="sourceLineNo">153</span> this.tableName = tableName;<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> this.lock = setupTableLock();<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> }<a name="line.155"></a> |
| <span class="sourceLineNo">156</span><a name="line.156"></a> |
| <span class="sourceLineNo">157</span> /**<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> * Constructor for region lock(s).<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> * @param lockAcquireLatch if not null, the latch is decreased when lock is acquired. Useful for<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> * locks acquired locally from master process.<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> * @throws IllegalArgumentException if all regions are not from same table.<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> */<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> public LockProcedure(final Configuration conf, final RegionInfo[] regionInfos,<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> final LockType type, final String description, final CountDownLatch lockAcquireLatch)<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> throws IllegalArgumentException {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> this(conf, type, description, lockAcquireLatch);<a name="line.166"></a> |
| <span class="sourceLineNo">167</span><a name="line.167"></a> |
| <span class="sourceLineNo">168</span> // Build RegionInfo from region names.<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> if (regionInfos.length == 0) {<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> throw new IllegalArgumentException("No regions specified for region lock");<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> }<a name="line.171"></a> |
| <span class="sourceLineNo">172</span><a name="line.172"></a> |
| <span class="sourceLineNo">173</span> // check all regions belong to same table.<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> final TableName regionTable = regionInfos[0].getTable();<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> for (int i = 1; i < regionInfos.length; ++i) {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> if (!regionInfos[i].getTable().equals(regionTable)) {<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> throw new IllegalArgumentException("All regions should be from same table");<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> }<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> }<a name="line.179"></a> |
| <span class="sourceLineNo">180</span><a name="line.180"></a> |
| <span class="sourceLineNo">181</span> this.regionInfos = regionInfos;<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> this.lock = setupRegionLock();<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> }<a name="line.183"></a> |
| <span class="sourceLineNo">184</span><a name="line.184"></a> |
| <span class="sourceLineNo">185</span> private boolean hasHeartbeatExpired() {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> return EnvironmentEdgeManager.currentTime() - lastHeartBeat.get() >= getTimeout();<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> }<a name="line.187"></a> |
| <span class="sourceLineNo">188</span><a name="line.188"></a> |
| <span class="sourceLineNo">189</span> /**<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> * Updates timeout deadline for the lock.<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> */<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> public void updateHeartBeat() {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> lastHeartBeat.set(EnvironmentEdgeManager.currentTime());<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> if (LOG.isDebugEnabled()) {<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> LOG.debug("Heartbeat " + toString());<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> }<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> }<a name="line.197"></a> |
| <span class="sourceLineNo">198</span><a name="line.198"></a> |
| <span class="sourceLineNo">199</span> /**<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> * Re run the procedure after every timeout to write new WAL entries so we don't hold back old<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> * WALs.<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> * @return false, so procedure framework doesn't mark this procedure as failure.<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> */<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> @Override<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> protected synchronized boolean setTimeoutFailure(final MasterProcedureEnv env) {<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> synchronized (event) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> if (LOG.isDebugEnabled()) LOG.debug("Timeout failure " + this.event);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> if (!event.isReady()) { // Maybe unlock() awakened the event.<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> setState(ProcedureProtos.ProcedureState.RUNNABLE);<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> if (LOG.isDebugEnabled()) LOG.debug("Calling wake on " + this.event);<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> event.wake(env.getProcedureScheduler());<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> }<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> }<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> return false; // false: do not mark the procedure as failed.<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> }<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> // Can be called before procedure gets scheduled, in which case, the execute() will finish<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> // immediately and release the underlying locks.<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> public void unlock(final MasterProcedureEnv env) {<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> unlock.set(true);<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> locked.set(false);<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> // Maybe timeout already awakened the event and the procedure has finished.<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> synchronized (event) {<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> if (!event.isReady() && suspended) {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> setState(ProcedureProtos.ProcedureState.RUNNABLE);<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> event.wake(env.getProcedureScheduler());<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> suspended = false;<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> }<a name="line.230"></a> |
| <span class="sourceLineNo">231</span><a name="line.231"></a> |
| <span class="sourceLineNo">232</span> @Override<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> protected Procedure<MasterProcedureEnv>[] execute(final MasterProcedureEnv env)<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> throws ProcedureSuspendedException {<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> // Local master locks don't store any state, so on recovery, simply finish this procedure<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> // immediately.<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> if (recoveredMasterLock) return null;<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> if (lockAcquireLatch != null) {<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> lockAcquireLatch.countDown();<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> }<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> if (unlock.get() || hasHeartbeatExpired()) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> locked.set(false);<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> LOG.debug((unlock.get() ? "UNLOCKED " : "TIMED OUT ") + toString());<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> return null;<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> synchronized (event) {<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> event.suspend();<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> event.suspendIfNotReady(this);<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> setState(ProcedureProtos.ProcedureState.WAITING_TIMEOUT);<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> suspended = true;<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> }<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> throw new ProcedureSuspendedException();<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> }<a name="line.253"></a> |
| <span class="sourceLineNo">254</span><a name="line.254"></a> |
| <span class="sourceLineNo">255</span> @Override<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> protected void rollback(final MasterProcedureEnv env) {<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> throw new UnsupportedOperationException();<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> }<a name="line.258"></a> |
| <span class="sourceLineNo">259</span><a name="line.259"></a> |
| <span class="sourceLineNo">260</span> @Override<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> protected boolean abort(final MasterProcedureEnv env) {<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> unlock(env);<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> return true;<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> }<a name="line.264"></a> |
| <span class="sourceLineNo">265</span><a name="line.265"></a> |
| <span class="sourceLineNo">266</span> @Override<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> protected void serializeStateData(ProcedureStateSerializer serializer) throws IOException {<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> final LockProcedureData.Builder builder = LockProcedureData.newBuilder()<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> .setLockType(LockServiceProtos.LockType.valueOf(type.name())).setDescription(description);<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> if (regionInfos != null) {<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> for (int i = 0; i < regionInfos.length; ++i) {<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> builder.addRegionInfo(ProtobufUtil.toRegionInfo(regionInfos[i]));<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> }<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> } else if (namespace != null) {<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> builder.setNamespace(namespace);<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> } else if (tableName != null) {<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> builder.setTableName(ProtobufUtil.toProtoTableName(tableName));<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> }<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> if (lockAcquireLatch != null) {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> builder.setIsMasterLock(true);<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> }<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> serializer.serialize(builder.build());<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> }<a name="line.283"></a> |
| <span class="sourceLineNo">284</span><a name="line.284"></a> |
| <span class="sourceLineNo">285</span> @Override<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> protected void deserializeStateData(ProcedureStateSerializer serializer) throws IOException {<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> final LockProcedureData state = serializer.deserialize(LockProcedureData.class);<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> type = LockType.valueOf(state.getLockType().name());<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> description = state.getDescription();<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> if (state.getRegionInfoCount() > 0) {<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> regionInfos = new RegionInfo[state.getRegionInfoCount()];<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> for (int i = 0; i < state.getRegionInfoCount(); ++i) {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> regionInfos[i] = ProtobufUtil.toRegionInfo(state.getRegionInfo(i));<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> }<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> } else if (state.hasNamespace()) {<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> namespace = state.getNamespace();<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> } else if (state.hasTableName()) {<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> tableName = ProtobufUtil.toTableName(state.getTableName());<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> }<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> recoveredMasterLock = state.getIsMasterLock();<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> this.lock = setupLock();<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> }<a name="line.302"></a> |
| <span class="sourceLineNo">303</span><a name="line.303"></a> |
| <span class="sourceLineNo">304</span> @Override<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> protected LockState acquireLock(final MasterProcedureEnv env) {<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> boolean ret = lock.acquireLock(env);<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> locked.set(ret);<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> if (ret) {<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> if (LOG.isDebugEnabled()) {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> LOG.debug("LOCKED " + toString());<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> }<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> lastHeartBeat.set(EnvironmentEdgeManager.currentTime());<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> return LockState.LOCK_ACQUIRED;<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> }<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> LOG.warn("Failed acquire LOCK " + toString() + "; YIELDING");<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> return LockState.LOCK_EVENT_WAIT;<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> @Override<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> protected void releaseLock(final MasterProcedureEnv env) {<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> lock.releaseLock(env);<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> }<a name="line.322"></a> |
| <span class="sourceLineNo">323</span><a name="line.323"></a> |
| <span class="sourceLineNo">324</span> /**<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> * On recovery, re-execute from start to acquire the locks. Need to explicitly set it to RUNNABLE<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> * because the procedure might have been in WAITING_TIMEOUT state when crash happened. In which<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> * case, it'll be sent back to timeout queue on recovery, which we don't want since we want to<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> * require locks.<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> */<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> @Override<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> protected void beforeReplay(MasterProcedureEnv env) {<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> setState(ProcedureProtos.ProcedureState.RUNNABLE);<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> }<a name="line.333"></a> |
| <span class="sourceLineNo">334</span><a name="line.334"></a> |
| <span class="sourceLineNo">335</span> @Override<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> protected void toStringClassDetails(final StringBuilder builder) {<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> super.toStringClassDetails(builder);<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> if (regionInfos != null) {<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> builder.append(" regions=");<a name="line.339"></a> |
| <span class="sourceLineNo">340</span> for (int i = 0; i < regionInfos.length; ++i) {<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> if (i > 0) builder.append(",");<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> builder.append(regionInfos[i].getShortNameToLog());<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> }<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> } else if (namespace != null) {<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> builder.append(", namespace=").append(namespace);<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> } else if (tableName != null) {<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> builder.append(", tableName=").append(tableName);<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> }<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> builder.append(", type=").append(type);<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> }<a name="line.350"></a> |
| <span class="sourceLineNo">351</span><a name="line.351"></a> |
| <span class="sourceLineNo">352</span> public LockType getType() {<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> return type;<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> private LockInterface setupLock() throws IllegalArgumentException {<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> if (regionInfos != null) {<a name="line.357"></a> |
| <span class="sourceLineNo">358</span> return setupRegionLock();<a name="line.358"></a> |
| <span class="sourceLineNo">359</span> } else if (namespace != null) {<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> return setupNamespaceLock();<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> } else if (tableName != null) {<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> return setupTableLock();<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> } else {<a name="line.363"></a> |
| <span class="sourceLineNo">364</span> LOG.error("Unknown level specified in " + toString());<a name="line.364"></a> |
| <span class="sourceLineNo">365</span> throw new IllegalArgumentException("no namespace/table/region provided");<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> }<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> }<a name="line.367"></a> |
| <span class="sourceLineNo">368</span><a name="line.368"></a> |
| <span class="sourceLineNo">369</span> private LockInterface setupNamespaceLock() throws IllegalArgumentException {<a name="line.369"></a> |
| <span class="sourceLineNo">370</span> this.tableName = TableProcedureInterface.DUMMY_NAMESPACE_TABLE_NAME;<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> switch (type) {<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> case EXCLUSIVE:<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> this.opType = TableOperationType.EDIT;<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> return new NamespaceExclusiveLock();<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> case SHARED:<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> LOG.error("Shared lock on namespace not supported for " + toString());<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> throw new IllegalArgumentException("Shared lock on namespace not supported");<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> default:<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> LOG.error("Unexpected lock type " + toString());<a name="line.379"></a> |
| <span class="sourceLineNo">380</span> throw new IllegalArgumentException("Wrong lock type: " + type.toString());<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> }<a name="line.381"></a> |
| <span class="sourceLineNo">382</span> }<a name="line.382"></a> |
| <span class="sourceLineNo">383</span><a name="line.383"></a> |
| <span class="sourceLineNo">384</span> private LockInterface setupTableLock() throws IllegalArgumentException {<a name="line.384"></a> |
| <span class="sourceLineNo">385</span> switch (type) {<a name="line.385"></a> |
| <span class="sourceLineNo">386</span> case EXCLUSIVE:<a name="line.386"></a> |
| <span class="sourceLineNo">387</span> this.opType = TableOperationType.EDIT;<a name="line.387"></a> |
| <span class="sourceLineNo">388</span> return new TableExclusiveLock();<a name="line.388"></a> |
| <span class="sourceLineNo">389</span> case SHARED:<a name="line.389"></a> |
| <span class="sourceLineNo">390</span> this.opType = TableOperationType.READ;<a name="line.390"></a> |
| <span class="sourceLineNo">391</span> return new TableSharedLock();<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> default:<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> LOG.error("Unexpected lock type " + toString());<a name="line.393"></a> |
| <span class="sourceLineNo">394</span> throw new IllegalArgumentException("Wrong lock type:" + type.toString());<a name="line.394"></a> |
| <span class="sourceLineNo">395</span> }<a name="line.395"></a> |
| <span class="sourceLineNo">396</span> }<a name="line.396"></a> |
| <span class="sourceLineNo">397</span><a name="line.397"></a> |
| <span class="sourceLineNo">398</span> private LockInterface setupRegionLock() throws IllegalArgumentException {<a name="line.398"></a> |
| <span class="sourceLineNo">399</span> this.tableName = regionInfos[0].getTable();<a name="line.399"></a> |
| <span class="sourceLineNo">400</span> switch (type) {<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> case EXCLUSIVE:<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> this.opType = TableOperationType.REGION_EDIT;<a name="line.402"></a> |
| <span class="sourceLineNo">403</span> return new RegionExclusiveLock();<a name="line.403"></a> |
| <span class="sourceLineNo">404</span> default:<a name="line.404"></a> |
| <span class="sourceLineNo">405</span> LOG.error("Only exclusive lock supported on regions for " + toString());<a name="line.405"></a> |
| <span class="sourceLineNo">406</span> throw new IllegalArgumentException("Only exclusive lock supported on regions.");<a name="line.406"></a> |
| <span class="sourceLineNo">407</span> }<a name="line.407"></a> |
| <span class="sourceLineNo">408</span> }<a name="line.408"></a> |
| <span class="sourceLineNo">409</span><a name="line.409"></a> |
| <span class="sourceLineNo">410</span> public String getDescription() {<a name="line.410"></a> |
| <span class="sourceLineNo">411</span> return description;<a name="line.411"></a> |
| <span class="sourceLineNo">412</span> }<a name="line.412"></a> |
| <span class="sourceLineNo">413</span><a name="line.413"></a> |
| <span class="sourceLineNo">414</span> public boolean isLocked() {<a name="line.414"></a> |
| <span class="sourceLineNo">415</span> return locked.get();<a name="line.415"></a> |
| <span class="sourceLineNo">416</span> }<a name="line.416"></a> |
| <span class="sourceLineNo">417</span><a name="line.417"></a> |
| <span class="sourceLineNo">418</span> @Override<a name="line.418"></a> |
| <span class="sourceLineNo">419</span> public boolean holdLock(final MasterProcedureEnv env) {<a name="line.419"></a> |
| <span class="sourceLineNo">420</span> return true;<a name="line.420"></a> |
| <span class="sourceLineNo">421</span> }<a name="line.421"></a> |
| <span class="sourceLineNo">422</span><a name="line.422"></a> |
| <span class="sourceLineNo">423</span> ///////////////////////<a name="line.423"></a> |
| <span class="sourceLineNo">424</span> // LOCK IMPLEMENTATIONS<a name="line.424"></a> |
| <span class="sourceLineNo">425</span> ///////////////////////<a name="line.425"></a> |
| <span class="sourceLineNo">426</span><a name="line.426"></a> |
| <span class="sourceLineNo">427</span> private class TableExclusiveLock implements LockInterface {<a name="line.427"></a> |
| <span class="sourceLineNo">428</span> @Override<a name="line.428"></a> |
| <span class="sourceLineNo">429</span> public boolean acquireLock(final MasterProcedureEnv env) {<a name="line.429"></a> |
| <span class="sourceLineNo">430</span> // We invert return from waitNamespaceExclusiveLock; it returns true if you HAVE TO WAIT<a name="line.430"></a> |
| <span class="sourceLineNo">431</span> // to get the lock and false if you don't; i.e. you got the lock.<a name="line.431"></a> |
| <span class="sourceLineNo">432</span> return !env.getProcedureScheduler().waitTableExclusiveLock(LockProcedure.this, tableName);<a name="line.432"></a> |
| <span class="sourceLineNo">433</span> }<a name="line.433"></a> |
| <span class="sourceLineNo">434</span><a name="line.434"></a> |
| <span class="sourceLineNo">435</span> @Override<a name="line.435"></a> |
| <span class="sourceLineNo">436</span> public void releaseLock(final MasterProcedureEnv env) {<a name="line.436"></a> |
| <span class="sourceLineNo">437</span> env.getProcedureScheduler().wakeTableExclusiveLock(LockProcedure.this, tableName);<a name="line.437"></a> |
| <span class="sourceLineNo">438</span> }<a name="line.438"></a> |
| <span class="sourceLineNo">439</span> }<a name="line.439"></a> |
| <span class="sourceLineNo">440</span><a name="line.440"></a> |
| <span class="sourceLineNo">441</span> private class TableSharedLock implements LockInterface {<a name="line.441"></a> |
| <span class="sourceLineNo">442</span> @Override<a name="line.442"></a> |
| <span class="sourceLineNo">443</span> public boolean acquireLock(final MasterProcedureEnv env) {<a name="line.443"></a> |
| <span class="sourceLineNo">444</span> // We invert return from waitNamespaceExclusiveLock; it returns true if you HAVE TO WAIT<a name="line.444"></a> |
| <span class="sourceLineNo">445</span> // to get the lock and false if you don't; i.e. you got the lock.<a name="line.445"></a> |
| <span class="sourceLineNo">446</span> return !env.getProcedureScheduler().waitTableSharedLock(LockProcedure.this, tableName);<a name="line.446"></a> |
| <span class="sourceLineNo">447</span> }<a name="line.447"></a> |
| <span class="sourceLineNo">448</span><a name="line.448"></a> |
| <span class="sourceLineNo">449</span> @Override<a name="line.449"></a> |
| <span class="sourceLineNo">450</span> public void releaseLock(final MasterProcedureEnv env) {<a name="line.450"></a> |
| <span class="sourceLineNo">451</span> env.getProcedureScheduler().wakeTableSharedLock(LockProcedure.this, tableName);<a name="line.451"></a> |
| <span class="sourceLineNo">452</span> }<a name="line.452"></a> |
| <span class="sourceLineNo">453</span> }<a name="line.453"></a> |
| <span class="sourceLineNo">454</span><a name="line.454"></a> |
| <span class="sourceLineNo">455</span> private class NamespaceExclusiveLock implements LockInterface {<a name="line.455"></a> |
| <span class="sourceLineNo">456</span> @Override<a name="line.456"></a> |
| <span class="sourceLineNo">457</span> public boolean acquireLock(final MasterProcedureEnv env) {<a name="line.457"></a> |
| <span class="sourceLineNo">458</span> // We invert return from waitNamespaceExclusiveLock; it returns true if you HAVE TO WAIT<a name="line.458"></a> |
| <span class="sourceLineNo">459</span> // to get the lock and false if you don't; i.e. you got the lock.<a name="line.459"></a> |
| <span class="sourceLineNo">460</span> return !env.getProcedureScheduler().waitNamespaceExclusiveLock(LockProcedure.this, namespace);<a name="line.460"></a> |
| <span class="sourceLineNo">461</span> }<a name="line.461"></a> |
| <span class="sourceLineNo">462</span><a name="line.462"></a> |
| <span class="sourceLineNo">463</span> @Override<a name="line.463"></a> |
| <span class="sourceLineNo">464</span> public void releaseLock(final MasterProcedureEnv env) {<a name="line.464"></a> |
| <span class="sourceLineNo">465</span> env.getProcedureScheduler().wakeNamespaceExclusiveLock(LockProcedure.this, namespace);<a name="line.465"></a> |
| <span class="sourceLineNo">466</span> }<a name="line.466"></a> |
| <span class="sourceLineNo">467</span> }<a name="line.467"></a> |
| <span class="sourceLineNo">468</span><a name="line.468"></a> |
| <span class="sourceLineNo">469</span> private class RegionExclusiveLock implements LockInterface {<a name="line.469"></a> |
| <span class="sourceLineNo">470</span> @Override<a name="line.470"></a> |
| <span class="sourceLineNo">471</span> public boolean acquireLock(final MasterProcedureEnv env) {<a name="line.471"></a> |
| <span class="sourceLineNo">472</span> // We invert return from waitNamespaceExclusiveLock; it returns true if you HAVE TO WAIT<a name="line.472"></a> |
| <span class="sourceLineNo">473</span> // to get the lock and false if you don't; i.e. you got the lock.<a name="line.473"></a> |
| <span class="sourceLineNo">474</span> return !env.getProcedureScheduler().waitRegions(LockProcedure.this, tableName, regionInfos);<a name="line.474"></a> |
| <span class="sourceLineNo">475</span> }<a name="line.475"></a> |
| <span class="sourceLineNo">476</span><a name="line.476"></a> |
| <span class="sourceLineNo">477</span> @Override<a name="line.477"></a> |
| <span class="sourceLineNo">478</span> public void releaseLock(final MasterProcedureEnv env) {<a name="line.478"></a> |
| <span class="sourceLineNo">479</span> env.getProcedureScheduler().wakeRegions(LockProcedure.this, tableName, regionInfos);<a name="line.479"></a> |
| <span class="sourceLineNo">480</span> }<a name="line.480"></a> |
| <span class="sourceLineNo">481</span> }<a name="line.481"></a> |
| <span class="sourceLineNo">482</span>}<a name="line.482"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |