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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.master.procedure;</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.io.IOException;</span>
<span class="source-line-no">021</span><span id="line-21">import org.apache.hadoop.fs.Path;</span>
<span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.HBaseIOException;</span>
<span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.TableName;</span>
<span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.client.RegionInfo;</span>
<span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.master.MasterCoprocessorHost;</span>
<span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.master.MasterFileSystem;</span>
<span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.master.assignment.RegionStateNode;</span>
<span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.master.assignment.TransitRegionStateProcedure;</span>
<span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;</span>
<span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.regionserver.HRegionFileSystem;</span>
<span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.util.CommonFSUtils;</span>
<span class="source-line-no">032</span><span id="line-32">import org.apache.yetus.audience.InterfaceAudience;</span>
<span class="source-line-no">033</span><span id="line-33">import org.slf4j.Logger;</span>
<span class="source-line-no">034</span><span id="line-34">import org.slf4j.LoggerFactory;</span>
<span class="source-line-no">035</span><span id="line-35"></span>
<span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;</span>
<span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.TruncateRegionState;</span>
<span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.TruncateRegionStateData;</span>
<span class="source-line-no">039</span><span id="line-39"></span>
<span class="source-line-no">040</span><span id="line-40">@InterfaceAudience.Private</span>
<span class="source-line-no">041</span><span id="line-41">public class TruncateRegionProcedure</span>
<span class="source-line-no">042</span><span id="line-42"> extends AbstractStateMachineRegionProcedure&lt;TruncateRegionState&gt; {</span>
<span class="source-line-no">043</span><span id="line-43"> private static final Logger LOG = LoggerFactory.getLogger(TruncateRegionProcedure.class);</span>
<span class="source-line-no">044</span><span id="line-44"></span>
<span class="source-line-no">045</span><span id="line-45"> private String recoverySnapshotName;</span>
<span class="source-line-no">046</span><span id="line-46"></span>
<span class="source-line-no">047</span><span id="line-47"> @SuppressWarnings("unused")</span>
<span class="source-line-no">048</span><span id="line-48"> public TruncateRegionProcedure() {</span>
<span class="source-line-no">049</span><span id="line-49"> // Required by the Procedure framework to create the procedure on replay</span>
<span class="source-line-no">050</span><span id="line-50"> super();</span>
<span class="source-line-no">051</span><span id="line-51"> }</span>
<span class="source-line-no">052</span><span id="line-52"></span>
<span class="source-line-no">053</span><span id="line-53"> public TruncateRegionProcedure(final MasterProcedureEnv env, final RegionInfo hri)</span>
<span class="source-line-no">054</span><span id="line-54"> throws HBaseIOException {</span>
<span class="source-line-no">055</span><span id="line-55"> super(env, hri);</span>
<span class="source-line-no">056</span><span id="line-56"> checkOnline(env, getRegion());</span>
<span class="source-line-no">057</span><span id="line-57"> }</span>
<span class="source-line-no">058</span><span id="line-58"></span>
<span class="source-line-no">059</span><span id="line-59"> public TruncateRegionProcedure(final MasterProcedureEnv env, final RegionInfo region,</span>
<span class="source-line-no">060</span><span id="line-60"> ProcedurePrepareLatch latch) throws HBaseIOException {</span>
<span class="source-line-no">061</span><span id="line-61"> super(env, region, latch);</span>
<span class="source-line-no">062</span><span id="line-62"> preflightChecks(env, true);</span>
<span class="source-line-no">063</span><span id="line-63"> }</span>
<span class="source-line-no">064</span><span id="line-64"></span>
<span class="source-line-no">065</span><span id="line-65"> @Override</span>
<span class="source-line-no">066</span><span id="line-66"> protected Flow executeFromState(final MasterProcedureEnv env, TruncateRegionState state)</span>
<span class="source-line-no">067</span><span id="line-67"> throws InterruptedException {</span>
<span class="source-line-no">068</span><span id="line-68"> if (LOG.isTraceEnabled()) {</span>
<span class="source-line-no">069</span><span id="line-69"> LOG.trace(this + " execute state=" + state);</span>
<span class="source-line-no">070</span><span id="line-70"> }</span>
<span class="source-line-no">071</span><span id="line-71"> try {</span>
<span class="source-line-no">072</span><span id="line-72"> switch (state) {</span>
<span class="source-line-no">073</span><span id="line-73"> case TRUNCATE_REGION_PRE_OPERATION:</span>
<span class="source-line-no">074</span><span id="line-74"> if (!prepareTruncate()) {</span>
<span class="source-line-no">075</span><span id="line-75"> assert isFailed() : "the truncate should have an exception here";</span>
<span class="source-line-no">076</span><span id="line-76"> return Flow.NO_MORE_STATE;</span>
<span class="source-line-no">077</span><span id="line-77"> }</span>
<span class="source-line-no">078</span><span id="line-78"> checkOnline(env, getRegion());</span>
<span class="source-line-no">079</span><span id="line-79"> assert getRegion().getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID || isFailed()</span>
<span class="source-line-no">080</span><span id="line-80"> : "Can't truncate replicas directly. "</span>
<span class="source-line-no">081</span><span id="line-81"> + "Replicas are auto-truncated when their primary is truncated.";</span>
<span class="source-line-no">082</span><span id="line-82"> preTruncate(env);</span>
<span class="source-line-no">083</span><span id="line-83"></span>
<span class="source-line-no">084</span><span id="line-84"> // Check if we should create a recovery snapshot</span>
<span class="source-line-no">085</span><span id="line-85"> if (RecoverySnapshotUtils.isRecoveryEnabled(env)) {</span>
<span class="source-line-no">086</span><span id="line-86"> setNextState(TruncateRegionState.TRUNCATE_REGION_SNAPSHOT);</span>
<span class="source-line-no">087</span><span id="line-87"> } else {</span>
<span class="source-line-no">088</span><span id="line-88"> setNextState(TruncateRegionState.TRUNCATE_REGION_MAKE_OFFLINE);</span>
<span class="source-line-no">089</span><span id="line-89"> }</span>
<span class="source-line-no">090</span><span id="line-90"> break;</span>
<span class="source-line-no">091</span><span id="line-91"> case TRUNCATE_REGION_SNAPSHOT:</span>
<span class="source-line-no">092</span><span id="line-92"> // Create recovery snapshot procedure as child procedure</span>
<span class="source-line-no">093</span><span id="line-93"> recoverySnapshotName = RecoverySnapshotUtils.generateSnapshotName(getTableName());</span>
<span class="source-line-no">094</span><span id="line-94"> SnapshotProcedure snapshotProcedure =</span>
<span class="source-line-no">095</span><span id="line-95"> RecoverySnapshotUtils.createSnapshotProcedure(env, getTableName(), recoverySnapshotName,</span>
<span class="source-line-no">096</span><span id="line-96"> env.getMasterServices().getTableDescriptors().get(getTableName()));</span>
<span class="source-line-no">097</span><span id="line-97"> // Submit snapshot procedure as child procedure</span>
<span class="source-line-no">098</span><span id="line-98"> addChildProcedure(snapshotProcedure);</span>
<span class="source-line-no">099</span><span id="line-99"> LOG.debug("Creating recovery snapshot {} for table {} before truncating region {}",</span>
<span class="source-line-no">100</span><span id="line-100"> recoverySnapshotName, getTableName(), getRegion().getRegionNameAsString());</span>
<span class="source-line-no">101</span><span id="line-101"> setNextState(TruncateRegionState.TRUNCATE_REGION_MAKE_OFFLINE);</span>
<span class="source-line-no">102</span><span id="line-102"> break;</span>
<span class="source-line-no">103</span><span id="line-103"> case TRUNCATE_REGION_MAKE_OFFLINE:</span>
<span class="source-line-no">104</span><span id="line-104"> addChildProcedure(createUnAssignProcedures(env));</span>
<span class="source-line-no">105</span><span id="line-105"> setNextState(TruncateRegionState.TRUNCATE_REGION_REMOVE);</span>
<span class="source-line-no">106</span><span id="line-106"> break;</span>
<span class="source-line-no">107</span><span id="line-107"> case TRUNCATE_REGION_REMOVE:</span>
<span class="source-line-no">108</span><span id="line-108"> deleteRegionFromFileSystem(env);</span>
<span class="source-line-no">109</span><span id="line-109"> setNextState(TruncateRegionState.TRUNCATE_REGION_MAKE_ONLINE);</span>
<span class="source-line-no">110</span><span id="line-110"> break;</span>
<span class="source-line-no">111</span><span id="line-111"> case TRUNCATE_REGION_MAKE_ONLINE:</span>
<span class="source-line-no">112</span><span id="line-112"> addChildProcedure(createAssignProcedures(env));</span>
<span class="source-line-no">113</span><span id="line-113"> setNextState(TruncateRegionState.TRUNCATE_REGION_POST_OPERATION);</span>
<span class="source-line-no">114</span><span id="line-114"> break;</span>
<span class="source-line-no">115</span><span id="line-115"> case TRUNCATE_REGION_POST_OPERATION:</span>
<span class="source-line-no">116</span><span id="line-116"> postTruncate(env);</span>
<span class="source-line-no">117</span><span id="line-117"> LOG.debug("truncate '" + getTableName() + "' completed");</span>
<span class="source-line-no">118</span><span id="line-118"> return Flow.NO_MORE_STATE;</span>
<span class="source-line-no">119</span><span id="line-119"> default:</span>
<span class="source-line-no">120</span><span id="line-120"> throw new UnsupportedOperationException("unhandled state=" + state);</span>
<span class="source-line-no">121</span><span id="line-121"> }</span>
<span class="source-line-no">122</span><span id="line-122"> } catch (IOException e) {</span>
<span class="source-line-no">123</span><span id="line-123"> if (isRollbackSupported(state)) {</span>
<span class="source-line-no">124</span><span id="line-124"> setFailure("master-truncate-region", e);</span>
<span class="source-line-no">125</span><span id="line-125"> } else {</span>
<span class="source-line-no">126</span><span id="line-126"> LOG.warn("Retriable error trying to truncate region=" + getRegion().getRegionNameAsString()</span>
<span class="source-line-no">127</span><span id="line-127"> + " state=" + state, e);</span>
<span class="source-line-no">128</span><span id="line-128"> }</span>
<span class="source-line-no">129</span><span id="line-129"> }</span>
<span class="source-line-no">130</span><span id="line-130"> return Flow.HAS_MORE_STATE;</span>
<span class="source-line-no">131</span><span id="line-131"> }</span>
<span class="source-line-no">132</span><span id="line-132"></span>
<span class="source-line-no">133</span><span id="line-133"> private void deleteRegionFromFileSystem(final MasterProcedureEnv env) throws IOException {</span>
<span class="source-line-no">134</span><span id="line-134"> RegionStateNode regionNode =</span>
<span class="source-line-no">135</span><span id="line-135"> env.getAssignmentManager().getRegionStates().getRegionStateNode(getRegion());</span>
<span class="source-line-no">136</span><span id="line-136"> regionNode.lock();</span>
<span class="source-line-no">137</span><span id="line-137"> try {</span>
<span class="source-line-no">138</span><span id="line-138"> final MasterFileSystem mfs = env.getMasterServices().getMasterFileSystem();</span>
<span class="source-line-no">139</span><span id="line-139"> final Path tableDir = CommonFSUtils.getTableDir(mfs.getRootDir(), getTableName());</span>
<span class="source-line-no">140</span><span id="line-140"> HRegionFileSystem.deleteRegionFromFileSystem(env.getMasterConfiguration(),</span>
<span class="source-line-no">141</span><span id="line-141"> mfs.getFileSystem(), tableDir, getRegion());</span>
<span class="source-line-no">142</span><span id="line-142"> } finally {</span>
<span class="source-line-no">143</span><span id="line-143"> regionNode.unlock();</span>
<span class="source-line-no">144</span><span id="line-144"> }</span>
<span class="source-line-no">145</span><span id="line-145"> }</span>
<span class="source-line-no">146</span><span id="line-146"></span>
<span class="source-line-no">147</span><span id="line-147"> @Override</span>
<span class="source-line-no">148</span><span id="line-148"> protected void rollbackState(final MasterProcedureEnv env, final TruncateRegionState state)</span>
<span class="source-line-no">149</span><span id="line-149"> throws IOException {</span>
<span class="source-line-no">150</span><span id="line-150"> switch (state) {</span>
<span class="source-line-no">151</span><span id="line-151"> case TRUNCATE_REGION_PRE_OPERATION:</span>
<span class="source-line-no">152</span><span id="line-152"> // Nothing to rollback, pre-truncate is just table-state checks.</span>
<span class="source-line-no">153</span><span id="line-153"> return;</span>
<span class="source-line-no">154</span><span id="line-154"> case TRUNCATE_REGION_SNAPSHOT:</span>
<span class="source-line-no">155</span><span id="line-155"> // Handle recovery snapshot rollback. There is no DeleteSnapshotProcedure as such to use</span>
<span class="source-line-no">156</span><span id="line-156"> // here directly as a child procedure, so we call a utility method to delete the snapshot</span>
<span class="source-line-no">157</span><span id="line-157"> // which uses the SnapshotManager to delete the snapshot.</span>
<span class="source-line-no">158</span><span id="line-158"> if (recoverySnapshotName != null) {</span>
<span class="source-line-no">159</span><span id="line-159"> RecoverySnapshotUtils.deleteRecoverySnapshot(env, recoverySnapshotName, getTableName());</span>
<span class="source-line-no">160</span><span id="line-160"> recoverySnapshotName = null;</span>
<span class="source-line-no">161</span><span id="line-161"> }</span>
<span class="source-line-no">162</span><span id="line-162"> return;</span>
<span class="source-line-no">163</span><span id="line-163"> case TRUNCATE_REGION_MAKE_OFFLINE:</span>
<span class="source-line-no">164</span><span id="line-164"> RegionStateNode regionNode =</span>
<span class="source-line-no">165</span><span id="line-165"> env.getAssignmentManager().getRegionStates().getRegionStateNode(getRegion());</span>
<span class="source-line-no">166</span><span id="line-166"> if (regionNode == null) {</span>
<span class="source-line-no">167</span><span id="line-167"> // Region was unassigned by state TRUNCATE_REGION_MAKE_OFFLINE.</span>
<span class="source-line-no">168</span><span id="line-168"> // So Assign it back</span>
<span class="source-line-no">169</span><span id="line-169"> addChildProcedure(createAssignProcedures(env));</span>
<span class="source-line-no">170</span><span id="line-170"> }</span>
<span class="source-line-no">171</span><span id="line-171"> return;</span>
<span class="source-line-no">172</span><span id="line-172"> default:</span>
<span class="source-line-no">173</span><span id="line-173"> // The truncate doesn't have a rollback. The execution will succeed, at some point.</span>
<span class="source-line-no">174</span><span id="line-174"> throw new UnsupportedOperationException("unhandled state=" + state);</span>
<span class="source-line-no">175</span><span id="line-175"> }</span>
<span class="source-line-no">176</span><span id="line-176"> }</span>
<span class="source-line-no">177</span><span id="line-177"></span>
<span class="source-line-no">178</span><span id="line-178"> @Override</span>
<span class="source-line-no">179</span><span id="line-179"> protected void completionCleanup(final MasterProcedureEnv env) {</span>
<span class="source-line-no">180</span><span id="line-180"> releaseSyncLatch();</span>
<span class="source-line-no">181</span><span id="line-181"> }</span>
<span class="source-line-no">182</span><span id="line-182"></span>
<span class="source-line-no">183</span><span id="line-183"> @Override</span>
<span class="source-line-no">184</span><span id="line-184"> protected boolean isRollbackSupported(final TruncateRegionState state) {</span>
<span class="source-line-no">185</span><span id="line-185"> switch (state) {</span>
<span class="source-line-no">186</span><span id="line-186"> case TRUNCATE_REGION_PRE_OPERATION:</span>
<span class="source-line-no">187</span><span id="line-187"> case TRUNCATE_REGION_SNAPSHOT:</span>
<span class="source-line-no">188</span><span id="line-188"> case TRUNCATE_REGION_MAKE_OFFLINE:</span>
<span class="source-line-no">189</span><span id="line-189"> return true;</span>
<span class="source-line-no">190</span><span id="line-190"> default:</span>
<span class="source-line-no">191</span><span id="line-191"> return false;</span>
<span class="source-line-no">192</span><span id="line-192"> }</span>
<span class="source-line-no">193</span><span id="line-193"> }</span>
<span class="source-line-no">194</span><span id="line-194"></span>
<span class="source-line-no">195</span><span id="line-195"> @Override</span>
<span class="source-line-no">196</span><span id="line-196"> protected TruncateRegionState getState(final int stateId) {</span>
<span class="source-line-no">197</span><span id="line-197"> return TruncateRegionState.forNumber(stateId);</span>
<span class="source-line-no">198</span><span id="line-198"> }</span>
<span class="source-line-no">199</span><span id="line-199"></span>
<span class="source-line-no">200</span><span id="line-200"> @Override</span>
<span class="source-line-no">201</span><span id="line-201"> protected int getStateId(final TruncateRegionState state) {</span>
<span class="source-line-no">202</span><span id="line-202"> return state.getNumber();</span>
<span class="source-line-no">203</span><span id="line-203"> }</span>
<span class="source-line-no">204</span><span id="line-204"></span>
<span class="source-line-no">205</span><span id="line-205"> @Override</span>
<span class="source-line-no">206</span><span id="line-206"> protected TruncateRegionState getInitialState() {</span>
<span class="source-line-no">207</span><span id="line-207"> return TruncateRegionState.TRUNCATE_REGION_PRE_OPERATION;</span>
<span class="source-line-no">208</span><span id="line-208"> }</span>
<span class="source-line-no">209</span><span id="line-209"></span>
<span class="source-line-no">210</span><span id="line-210"> @Override</span>
<span class="source-line-no">211</span><span id="line-211"> public void toStringClassDetails(StringBuilder sb) {</span>
<span class="source-line-no">212</span><span id="line-212"> sb.append(getClass().getSimpleName());</span>
<span class="source-line-no">213</span><span id="line-213"> sb.append(" (region=");</span>
<span class="source-line-no">214</span><span id="line-214"> sb.append(getRegion().getRegionNameAsString());</span>
<span class="source-line-no">215</span><span id="line-215"> sb.append(")");</span>
<span class="source-line-no">216</span><span id="line-216"> }</span>
<span class="source-line-no">217</span><span id="line-217"></span>
<span class="source-line-no">218</span><span id="line-218"> private boolean prepareTruncate() throws IOException {</span>
<span class="source-line-no">219</span><span id="line-219"> if (getTableName().equals(TableName.META_TABLE_NAME)) {</span>
<span class="source-line-no">220</span><span id="line-220"> throw new IOException("Can't truncate region in catalog tables");</span>
<span class="source-line-no">221</span><span id="line-221"> }</span>
<span class="source-line-no">222</span><span id="line-222"> return true;</span>
<span class="source-line-no">223</span><span id="line-223"> }</span>
<span class="source-line-no">224</span><span id="line-224"></span>
<span class="source-line-no">225</span><span id="line-225"> private void preTruncate(final MasterProcedureEnv env) throws IOException {</span>
<span class="source-line-no">226</span><span id="line-226"> final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();</span>
<span class="source-line-no">227</span><span id="line-227"> if (cpHost != null) {</span>
<span class="source-line-no">228</span><span id="line-228"> cpHost.preTruncateRegionAction(getRegion(), getUser());</span>
<span class="source-line-no">229</span><span id="line-229"> }</span>
<span class="source-line-no">230</span><span id="line-230"> }</span>
<span class="source-line-no">231</span><span id="line-231"></span>
<span class="source-line-no">232</span><span id="line-232"> private void postTruncate(final MasterProcedureEnv env) throws IOException {</span>
<span class="source-line-no">233</span><span id="line-233"> final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();</span>
<span class="source-line-no">234</span><span id="line-234"> if (cpHost != null) {</span>
<span class="source-line-no">235</span><span id="line-235"> cpHost.postTruncateRegionAction(getRegion(), getUser());</span>
<span class="source-line-no">236</span><span id="line-236"> }</span>
<span class="source-line-no">237</span><span id="line-237"> }</span>
<span class="source-line-no">238</span><span id="line-238"></span>
<span class="source-line-no">239</span><span id="line-239"> @Override</span>
<span class="source-line-no">240</span><span id="line-240"> public TableOperationType getTableOperationType() {</span>
<span class="source-line-no">241</span><span id="line-241"> return TableOperationType.REGION_TRUNCATE;</span>
<span class="source-line-no">242</span><span id="line-242"> }</span>
<span class="source-line-no">243</span><span id="line-243"></span>
<span class="source-line-no">244</span><span id="line-244"> @Override</span>
<span class="source-line-no">245</span><span id="line-245"> protected void serializeStateData(ProcedureStateSerializer serializer) throws IOException {</span>
<span class="source-line-no">246</span><span id="line-246"> super.serializeStateData(serializer);</span>
<span class="source-line-no">247</span><span id="line-247"> TruncateRegionStateData.Builder state = TruncateRegionStateData.newBuilder()</span>
<span class="source-line-no">248</span><span id="line-248"> .setUserInfo(MasterProcedureUtil.toProtoUserInfo(getUser()))</span>
<span class="source-line-no">249</span><span id="line-249"> .setRegionInfo(ProtobufUtil.toRegionInfo(getRegion()));</span>
<span class="source-line-no">250</span><span id="line-250"> if (recoverySnapshotName != null) {</span>
<span class="source-line-no">251</span><span id="line-251"> state.setSnapshotName(recoverySnapshotName);</span>
<span class="source-line-no">252</span><span id="line-252"> }</span>
<span class="source-line-no">253</span><span id="line-253"> serializer.serialize(state.build());</span>
<span class="source-line-no">254</span><span id="line-254"> }</span>
<span class="source-line-no">255</span><span id="line-255"></span>
<span class="source-line-no">256</span><span id="line-256"> @Override</span>
<span class="source-line-no">257</span><span id="line-257"> protected void deserializeStateData(ProcedureStateSerializer serializer) throws IOException {</span>
<span class="source-line-no">258</span><span id="line-258"> super.deserializeStateData(serializer);</span>
<span class="source-line-no">259</span><span id="line-259"> TruncateRegionStateData state = serializer.deserialize(TruncateRegionStateData.class);</span>
<span class="source-line-no">260</span><span id="line-260"> setUser(MasterProcedureUtil.toUserInfo(state.getUserInfo()));</span>
<span class="source-line-no">261</span><span id="line-261"> setRegion(ProtobufUtil.toRegionInfo(state.getRegionInfo()));</span>
<span class="source-line-no">262</span><span id="line-262"> if (state.hasSnapshotName()) {</span>
<span class="source-line-no">263</span><span id="line-263"> recoverySnapshotName = state.getSnapshotName();</span>
<span class="source-line-no">264</span><span id="line-264"> }</span>
<span class="source-line-no">265</span><span id="line-265"> }</span>
<span class="source-line-no">266</span><span id="line-266"></span>
<span class="source-line-no">267</span><span id="line-267"> private TransitRegionStateProcedure createUnAssignProcedures(MasterProcedureEnv env)</span>
<span class="source-line-no">268</span><span id="line-268"> throws IOException {</span>
<span class="source-line-no">269</span><span id="line-269"> return env.getAssignmentManager().createOneUnassignProcedure(getRegion(), true, true);</span>
<span class="source-line-no">270</span><span id="line-270"> }</span>
<span class="source-line-no">271</span><span id="line-271"></span>
<span class="source-line-no">272</span><span id="line-272"> private TransitRegionStateProcedure createAssignProcedures(MasterProcedureEnv env) {</span>
<span class="source-line-no">273</span><span id="line-273"> return env.getAssignmentManager().createOneAssignProcedure(getRegion(), true, true);</span>
<span class="source-line-no">274</span><span id="line-274"> }</span>
<span class="source-line-no">275</span><span id="line-275"></span>
<span class="source-line-no">276</span><span id="line-276"> @Override</span>
<span class="source-line-no">277</span><span id="line-277"> protected boolean holdLock(MasterProcedureEnv env) {</span>
<span class="source-line-no">278</span><span id="line-278"> if (RecoverySnapshotUtils.isRecoveryEnabled(env)) {</span>
<span class="source-line-no">279</span><span id="line-279"> // If we are to take a recovery snapshot before deleting the region we will need to allow the</span>
<span class="source-line-no">280</span><span id="line-280"> // snapshot procedure to lock the table.</span>
<span class="source-line-no">281</span><span id="line-281"> return false;</span>
<span class="source-line-no">282</span><span id="line-282"> }</span>
<span class="source-line-no">283</span><span id="line-283"> return super.holdLock(env);</span>
<span class="source-line-no">284</span><span id="line-284"> }</span>
<span class="source-line-no">285</span><span id="line-285">}</span>
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