[GitHub] WillemJiang commented on a change in pull request #274: SCB-817, SCB-818 TCC Omega side implemenation

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WillemJiang commented on a change in pull request #274: SCB-817, SCB-818  TCC Omega side implemenation
URL: https://github.com/apache/incubator-servicecomb-saga/pull/274#discussion_r213171604
 
 

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 File path: omega/omega-connector/omega-connector-grpc/src/main/java/org/apache/servicecomb/saga/omega/connector/grpc/GrpcTccEventService.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.saga.omega.connector.grpc;
+
+import org.apache.servicecomb.saga.omega.context.ServiceConfig;
+import org.apache.servicecomb.saga.omega.transaction.AlphaResponse;
+import org.apache.servicecomb.saga.omega.transaction.tcc.MessageHandler;
+import org.apache.servicecomb.saga.omega.transaction.tcc.TccEventService;
+import org.apache.servicecomb.saga.omega.transaction.tcc.events.CoordinatedEvent;
+import org.apache.servicecomb.saga.omega.transaction.tcc.events.ParticipatedEvent;
+import org.apache.servicecomb.saga.omega.transaction.tcc.events.TccEndedEvent;
+import org.apache.servicecomb.saga.omega.transaction.tcc.events.TccStartedEvent;
+
+import org.apache.servicecomb.saga.pack.contract.grpc.GrpcAck;
+import org.apache.servicecomb.saga.pack.contract.grpc.GrpcServiceConfig;
+import org.apache.servicecomb.saga.pack.contract.grpc.GrpcTccCoordinatedEvent;
+import org.apache.servicecomb.saga.pack.contract.grpc.GrpcTccParticipatedEvent;
+import org.apache.servicecomb.saga.pack.contract.grpc.GrpcTccTransactionEndedEvent;
+import org.apache.servicecomb.saga.pack.contract.grpc.GrpcTccTransactionStartedEvent;
+import org.apache.servicecomb.saga.pack.contract.grpc.TccEventServiceGrpc;
+import org.apache.servicecomb.saga.pack.contract.grpc.TccEventServiceGrpc.TccEventServiceBlockingStub;
+import org.apache.servicecomb.saga.pack.contract.grpc.TccEventServiceGrpc.TccEventServiceStub;
+
+import io.grpc.ManagedChannel;
+
+public class GrpcTccEventService implements TccEventService {
+  private final GrpcServiceConfig serviceConfig;
+  private final String target;
+  private final TccEventServiceBlockingStub tccBlockingEventService;
+  private final TccEventServiceStub tccAsyncEventService;
+  private final GrpcCoordinateStreamObserver observer;
+
+  public GrpcTccEventService(ServiceConfig serviceConfig,
+      ManagedChannel channel,
+      String address,
+      MessageHandler handler
+      ) {
+    this.target = address;
+    tccBlockingEventService = TccEventServiceGrpc.newBlockingStub(channel);
+    tccAsyncEventService = TccEventServiceGrpc.newStub(channel);
+    this.serviceConfig = serviceConfig(serviceConfig.serviceName(), serviceConfig.instanceId());
+    observer = new GrpcCoordinateStreamObserver(handler);
+  }
+
+  @Override
+  public void onConnected() {
+    tccAsyncEventService.onConnected(serviceConfig, observer);
+  }
+
+  @Override
+  public void onDisconnected() {
+    tccBlockingEventService.onDisconnected(serviceConfig);
+  }
+
+  @Override
+  public void close() {
+    // do nothing here
+  }
+
+  @Override
+  public String target() {
+    return target;
+  }
+
+  @Override
+  public AlphaResponse participate(ParticipatedEvent participateEvent) {
+    GrpcAck grpcAck = tccBlockingEventService.participate(convertTo(participateEvent));
+    return new AlphaResponse(grpcAck.getAborted());
+  }
+
+  @Override
+  public AlphaResponse tccTransactionStart(TccStartedEvent tccStartEvent) {
+    GrpcAck grpcAck = tccBlockingEventService.onTccTransactionStarted(convertTo(tccStartEvent));
+    return new AlphaResponse(grpcAck.getAborted());
+  }
+
+
+  @Override
+  public AlphaResponse tccTransactionStop(TccEndedEvent tccEndEvent) {
+    GrpcAck grpcAck = tccBlockingEventService.onTccTransactionEnded(convertTo(tccEndEvent));
+    return new AlphaResponse(grpcAck.getAborted());
+
+  }
+
+  @Override
+  public AlphaResponse coordinate(CoordinatedEvent coordinatedEvent) {
 
 Review comment:
   It means alpha need to get the execution result of the coordinatedCommand.  This process can be asynchronized.  

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