[GitHub] cherrylzhao commented on a change in pull request #268: SCB-856 Implement reaction of the event in Alpha Server

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cherrylzhao commented on a change in pull request #268: SCB-856 Implement reaction of the event in Alpha Server
URL: https://github.com/apache/incubator-servicecomb-saga/pull/268#discussion_r213167306
 
 

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 File path: alpha/alpha-server/src/main/java/org/apache/servicecomb/saga/alpha/server/tcc/callback/TccCallbackEngine.java
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 @@ -0,0 +1,62 @@
+/*
+ * 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.alpha.server.tcc.callback;
+
+import java.lang.invoke.MethodHandles;
+import org.apache.servicecomb.saga.alpha.server.tcc.registry.TransactionEventRegistry;
+import org.apache.servicecomb.saga.alpha.server.tcc.event.ParticipatedEvent;
+import org.apache.servicecomb.saga.common.TransactionStatus;
+import org.apache.servicecomb.saga.pack.contract.grpc.GrpcTccTransactionEndedEvent;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TccCallbackEngine implements CallbackEngine {
+
+  private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
+  private final OmegaCallbackWrapper omegaCallbackWrapper;
+
+  public TccCallbackEngine(OmegaCallbackWrapper omegaCallbackWrapper) {
+    this.omegaCallbackWrapper = omegaCallbackWrapper;
+  }
+
+  @Override
+  public boolean execute(GrpcTccTransactionEndedEvent request) {
+    boolean result = true;
+    for (ParticipatedEvent event : TransactionEventRegistry.retrieve(request.getGlobalTxId())) {
+      try {
+        omegaCallbackWrapper.invoke(event, TransactionStatus.valueOf(request.getStatus()));
+      } catch (Exception ex) {
+        logError(event, ex);
+        result = false;
 
 Review comment:
   result was returned in GrpcOmegaTccCallback, please check it.

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