eric-lee-ltk commented on a change in pull request #138: [WIP] SCB-224 retry 
sub-transaction on failure
URL: 
https://github.com/apache/incubator-servicecomb-saga/pull/138#discussion_r174047412
 
 

 ##########
 File path: 
omega/omega-transaction/src/main/java/org/apache/servicecomb/saga/omega/transaction/DefaultRecovery.java
 ##########
 @@ -0,0 +1,80 @@
+/*
+ * 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.saga.omega.transaction;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.reflect.Method;
+
+import javax.transaction.InvalidTransactionException;
+
+import org.apache.servicecomb.saga.omega.context.OmegaContext;
+import org.apache.servicecomb.saga.omega.transaction.annotations.Compensable;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.reflect.MethodSignature;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class DefaultRecovery implements RecoveryPolicy {
 
 Review comment:
   Not exactly. As the compensation of backward recovery is handled 
asynchronously, this place is only used to execute bussiness logic once.

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