[GitHub] [servicecomb-pack] WillemJiang commented on a change in pull request #456: [SCB-1272] Improvement Omega timeout processing, interrupt request thread after the timeout

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WillemJiang commented on a change in pull request #456: [SCB-1272] Improvement Omega timeout processing, interrupt request thread after the timeout
URL: https://github.com/apache/servicecomb-pack/pull/456#discussion_r279646113
 
 

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 File path: omega/omega-transaction/src/main/java/org/apache/servicecomb/pack/omega/transaction/RecoveryPolicyTimeoutWrapper.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.servicecomb.pack.omega.transaction;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.reflect.Method;
+import java.nio.channels.ClosedByInterruptException;
+import java.util.Set;
+import java.util.concurrent.ConcurrentSkipListSet;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.TimeUnit;
+import org.apache.servicecomb.pack.omega.context.OmegaContext;
+import org.apache.servicecomb.pack.omega.transaction.annotations.Compensable;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.reflect.MethodSignature;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * RecoveryPolicy Wrapper
+ * 1.Use this wrapper to send a request if the @Compensable timeout>0
+ * 2.Terminate thread execution if execution time is greater than the timeout of @Compensable
+ *
+ * Exception
+ * 1.If the interrupt succeeds, a TransactionTimeoutException is thrown and the local transaction is rollback
+ * 2.If the interrupt fails, throw an OmegaException
+ *
+ * Note: Omega end thread coding advice
+ * 1.add short sleep to while true loop. Otherwise, the thread may not be able to terminate.
+ * 2.Replace the synchronized with ReentrantLock, Otherwise, the thread may not be able to terminate.
+ * */
+
+public class RecoveryPolicyTimeoutWrapper {
+
+  private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+  private static RecoveryPolicyTimeoutWrapper instance = new RecoveryPolicyTimeoutWrapper(100);
+  private AbstractRecoveryPolicy recoveryPolicy;
+  private final transient Set<TimeoutProb> timeoutProbs = new ConcurrentSkipListSet<TimeoutProb>();
+
+  public static RecoveryPolicyTimeoutWrapper getInstance() {
+    return instance;
+  }
+
+  public RecoveryPolicyTimeoutWrapper(int delay) {
+    this.interrupter.scheduleWithFixedDelay(
+        new Runnable() {
+          @Override
+          public void run() {
+            try {
+              RecoveryPolicyTimeoutWrapper.this.interrupt();
+            } catch (Exception e) {
+              LOG.error("", e);
 
 Review comment:
   We need to add more log information about it.

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