| /* |
| * 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.pack.alpha.server.fsm; |
| |
| import static com.seanyinx.github.unit.scaffolding.Randomness.uniquify; |
| |
| import io.grpc.ManagedChannel; |
| import io.grpc.stub.StreamObserver; |
| import java.util.Map; |
| import java.util.Queue; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| import java.util.function.Consumer; |
| import org.apache.servicecomb.pack.alpha.core.OmegaCallback; |
| import org.apache.servicecomb.pack.contract.grpc.GrpcAck; |
| import org.apache.servicecomb.pack.contract.grpc.GrpcCompensateCommand; |
| import org.apache.servicecomb.pack.contract.grpc.GrpcServiceConfig; |
| import org.apache.servicecomb.pack.contract.grpc.ServerMeta; |
| import org.apache.servicecomb.pack.contract.grpc.TxEventServiceGrpc; |
| import org.apache.servicecomb.pack.contract.grpc.TxEventServiceGrpc.TxEventServiceBlockingStub; |
| import org.apache.servicecomb.pack.contract.grpc.TxEventServiceGrpc.TxEventServiceStub; |
| |
| public class OmegaEventSender { |
| GrpcServiceConfig serviceConfig; |
| protected ManagedChannel clientChannel; |
| private TxEventServiceStub asyncStub; |
| private TxEventServiceBlockingStub blockingStub; |
| private final Queue<GrpcCompensateCommand> receivedCommands = new ConcurrentLinkedQueue<>(); |
| private final CompensationStreamObserver compensateResponseObserver = new CompensationStreamObserver( |
| this::onCompensation); |
| private Map<String, Map<String, OmegaCallback>> omegaCallbacks; |
| private OmegaEventSagaSimulator omegaEventSagaSimulator; |
| |
| private String serviceName; |
| private String instanceId; |
| |
| public void configClient(ManagedChannel clientChannel){ |
| this.clientChannel = clientChannel; |
| this.asyncStub = TxEventServiceGrpc.newStub(clientChannel); |
| this.blockingStub = TxEventServiceGrpc.newBlockingStub(clientChannel); |
| } |
| |
| public void shutdown(){ |
| this.clientChannel.shutdown(); |
| this.clientChannel = null; |
| } |
| |
| public void onConnected(){ |
| serviceConfig = GrpcServiceConfig.newBuilder() |
| .setServiceName(serviceName) |
| .setInstanceId(instanceId) |
| .build(); |
| asyncStub.onConnected(compensateResponseObserver).onNext(serviceConfig); |
| omegaEventSagaSimulator = OmegaEventSagaSimulator.builder().serviceName(serviceName).instanceId(instanceId).build(); |
| |
| } |
| |
| public void onDisconnected(){ |
| blockingStub.onDisconnected(serviceConfig); |
| } |
| |
| public ServerMeta onGetServerMeta(){ |
| return blockingStub.onGetServerMeta(serviceConfig); |
| } |
| |
| public void setOmegaCallbacks( |
| Map<String, Map<String, OmegaCallback>> omegaCallbacks) { |
| this.omegaCallbacks = omegaCallbacks; |
| } |
| |
| public Queue<GrpcCompensateCommand> getReceivedCommands() { |
| return receivedCommands; |
| } |
| |
| public TxEventServiceBlockingStub getBlockingStub() { |
| return blockingStub; |
| } |
| |
| public Map<String, Map<String, OmegaCallback>> getOmegaCallbacks(){ |
| return omegaCallbacks; |
| } |
| |
| public GrpcServiceConfig getServiceConfig() { |
| return serviceConfig; |
| } |
| |
| public void reset(){ |
| receivedCommands.clear(); |
| } |
| |
| public OmegaEventSagaSimulator getOmegaEventSagaSimulator(){ |
| return omegaEventSagaSimulator; |
| } |
| |
| private class CompensationStreamObserver implements StreamObserver<GrpcCompensateCommand> { |
| private final Consumer<GrpcCompensateCommand> consumer; |
| private boolean completed = false; |
| |
| private CompensationStreamObserver() { |
| this(command -> {}); |
| } |
| |
| private CompensationStreamObserver(Consumer<GrpcCompensateCommand> consumer) { |
| this.consumer = consumer; |
| } |
| |
| @Override |
| public void onNext(GrpcCompensateCommand command) { |
| // intercept received command |
| consumer.accept(command); |
| receivedCommands.add(command); |
| } |
| |
| @Override |
| public void onError(Throwable t) { |
| } |
| |
| @Override |
| public void onCompleted() { |
| completed = true; |
| } |
| |
| boolean isCompleted() { |
| return completed; |
| } |
| } |
| |
| private GrpcAck onCompensation(GrpcCompensateCommand command) { |
| return blockingStub.onTxEvent(omegaEventSagaSimulator.txCompensatedEvent(command.getGlobalTxId(),command.getLocalTxId(),command.getParentTxId())); |
| } |
| |
| public static OmegaEventSender.Builder builder() { |
| return new OmegaEventSender.Builder(); |
| } |
| |
| public static final class Builder { |
| |
| private String serviceName = uniquify("omega-serviceName"); |
| private String instanceId = uniquify("omega-instanceId"); |
| |
| public OmegaEventSender.Builder serviceName(String serviceName) { |
| this.serviceName = serviceName; |
| return this; |
| } |
| |
| public OmegaEventSender.Builder instanceId(String instanceId) { |
| this.instanceId = instanceId; |
| return this; |
| } |
| |
| public OmegaEventSender build() { |
| OmegaEventSender omegaEventSender = new OmegaEventSender(); |
| omegaEventSender.instanceId = this.instanceId; |
| omegaEventSender.serviceName = this.serviceName; |
| return omegaEventSender; |
| } |
| } |
| } |