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https://issues.apache.org/jira/browse/SCB-865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16593481#comment-16593481
]
ASF GitHub Bot commented on SCB-865:
------------------------------------
WillemJiang commented on a change in pull request #268: SCB-865 Implement
reaction of the event in Alpha Server
URL:
https://github.com/apache/incubator-servicecomb-saga/pull/268#discussion_r212937941
##########
File path:
alpha/alpha-server/src/main/java/org/apache/servicecomb/saga/alpha/server/tcc/GrpcTccEventService.java
##########
@@ -0,0 +1,83 @@
+/*
+ * 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;
+
+import io.grpc.stub.StreamObserver;
+import org.apache.servicecomb.saga.alpha.server.tcc.callback.OmegaCallback;
+import
org.apache.servicecomb.saga.alpha.server.tcc.registry.OmegaCallbacksRegistry;
+import org.apache.servicecomb.saga.alpha.server.tcc.callback.TccCallbackEngine;
+import
org.apache.servicecomb.saga.alpha.server.tcc.event.ParticipateEventFactory;
+import
org.apache.servicecomb.saga.alpha.server.tcc.registry.TransactionEventRegistry;
+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.GrpcTccCoordinateCommand;
+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;
+
+/**
+ * Grpc TCC event service implement.
+ */
+public class GrpcTccEventService extends
TccEventServiceGrpc.TccEventServiceImplBase {
+
+ private static final GrpcAck ALLOW =
GrpcAck.newBuilder().setAborted(false).build();
+
+ private static final GrpcAck REJECT =
GrpcAck.newBuilder().setAborted(true).build();
+
+ private final TccCallbackEngine tccCallbackEngine;
+
+ public GrpcTccEventService(
+ TccCallbackEngine tccCallbackEngine) {
+ this.tccCallbackEngine = tccCallbackEngine;
+ }
+
+ @Override
+ public void onConnected(GrpcServiceConfig request,
StreamObserver<GrpcTccCoordinateCommand> responseObserver) {
+ OmegaCallbacksRegistry.register(request, responseObserver);
+ }
+
+ @Override
+ public void onTccTransactionStarted(GrpcTccTransactionStartedEvent request,
StreamObserver<GrpcAck> responseObserver) {
+ responseObserver.onNext(ALLOW);
+ responseObserver.onCompleted();
+ }
+
+ @Override
+ public void participate(GrpcTccParticipatedEvent request,
StreamObserver<GrpcAck> responseObserver) {
+ TransactionEventRegistry.register(ParticipateEventFactory.create(request));
+ responseObserver.onNext(ALLOW);
+ responseObserver.onCompleted();
+ }
+
+ @Override
+ public void onTccTransactionEnded(GrpcTccTransactionEndedEvent request,
StreamObserver<GrpcAck> responseObserver) {
+ responseObserver.onNext(tccCallbackEngine.execute(request) ? ALLOW :
REJECT);
Review comment:
tccCallbackEngine may throw exception here.
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> Refactoring the Omega Interceptors
> ----------------------------------
>
> Key: SCB-865
> URL: https://issues.apache.org/jira/browse/SCB-865
> Project: Apache ServiceComb
> Issue Type: Improvement
> Components: Saga
> Reporter: Willem Jiang
> Priority: Major
>
> Current Omega transaction has two saga interceptors, one is for SagaStart,
> the other is for Compensable. As these two interceptor has different context
> to deal with, they are not supposed to share the same interface.
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