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https://issues.apache.org/jira/browse/SCB-817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16594431#comment-16594431
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ASF GitHub Bot commented on SCB-817:
------------------------------------
cherrylzhao 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_r213170272
##########
File path:
omega/omega-connector/omega-connector-grpc/src/main/java/org/apache/servicecomb/saga/omega/connector/grpc/GrpcTccEventService.java
##########
@@ -0,0 +1,156 @@
+/*
+ * 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:
I can't understand coordinate method mean, when sending transactionEndEvent,
alpha will send the cordinateCommand to omega instance asynchronous.
it is why onConnect method has a stream observer.
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> Setup the TCC events
> ---------------------
>
> Key: SCB-817
> URL: https://issues.apache.org/jira/browse/SCB-817
> Project: Apache ServiceComb
> Issue Type: Sub-task
> Components: Saga
> Reporter: Willem Jiang
> Assignee: Willem Jiang
> Priority: Major
>
> It could be a challenge for us to reuse the Saga event, so we may create
> another set of event for TCC to use.
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