| /* |
| * |
| * 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; |
| |
| import static java.util.Collections.emptyMap; |
| |
| import java.lang.invoke.MethodHandles; |
| import java.util.Date; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.servicecomb.pack.alpha.core.OmegaCallback; |
| import org.apache.servicecomb.pack.alpha.core.TxConsistentService; |
| import org.apache.servicecomb.pack.alpha.core.TxEvent; |
| 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.GrpcTxEvent; |
| import org.apache.servicecomb.pack.contract.grpc.ServerMeta; |
| import org.apache.servicecomb.pack.contract.grpc.TxEventServiceGrpc.TxEventServiceImplBase; |
| |
| import io.grpc.stub.StreamObserver; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| class GrpcTxEventEndpointImpl extends TxEventServiceImplBase { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| private static final GrpcAck ALLOW = GrpcAck.newBuilder().setAborted(false).build(); |
| private static final GrpcAck REJECT = GrpcAck.newBuilder().setAborted(true).build(); |
| |
| private final TxConsistentService txConsistentService; |
| |
| private final Map<String, Map<String, OmegaCallback>> omegaCallbacks; |
| private final ServerMeta serverMeta; |
| |
| GrpcTxEventEndpointImpl(TxConsistentService txConsistentService, |
| Map<String, Map<String, OmegaCallback>> omegaCallbacks, ServerMeta serverMeta) { |
| this.txConsistentService = txConsistentService; |
| this.omegaCallbacks = omegaCallbacks; |
| this.serverMeta = serverMeta; |
| } |
| |
| @Override |
| public StreamObserver<GrpcServiceConfig> onConnected(StreamObserver<GrpcCompensateCommand> responseObserver) { |
| return new StreamObserver<GrpcServiceConfig>() { |
| @Override |
| public void onNext(GrpcServiceConfig grpcServiceConfig) { |
| omegaCallbacks |
| .computeIfAbsent(grpcServiceConfig.getServiceName(), key -> new ConcurrentHashMap<>()) |
| .put(grpcServiceConfig.getInstanceId(), new GrpcOmegaCallback(responseObserver)); |
| // Respond to Omega connection request |
| responseObserver.onNext(GrpcCompensateCommand.newBuilder() |
| .setConnectedResponse(true) |
| .build()); |
| } |
| |
| @Override |
| public void onError(Throwable throwable) { |
| LOG.error(throwable.getMessage()); |
| } |
| |
| @Override |
| public void onCompleted() { |
| // Do nothing here |
| } |
| }; |
| } |
| |
| // TODO: 2018/1/5 connect is async and disconnect is sync, meaning callback may not be registered on disconnected |
| @Override |
| public void onDisconnected(GrpcServiceConfig request, StreamObserver<GrpcAck> responseObserver) { |
| OmegaCallback callback = omegaCallbacks.getOrDefault(request.getServiceName(), emptyMap()) |
| .remove(request.getInstanceId()); |
| |
| if (callback != null) { |
| callback.disconnect(); |
| } |
| |
| responseObserver.onNext(ALLOW); |
| responseObserver.onCompleted(); |
| } |
| |
| @Override |
| public void onTxEvent(GrpcTxEvent message, StreamObserver<GrpcAck> responseObserver) { |
| boolean ok = txConsistentService.handle(new TxEvent( |
| message.getServiceName(), |
| message.getInstanceId(), |
| new Date(), |
| message.getGlobalTxId(), |
| message.getLocalTxId(), |
| message.getParentTxId().isEmpty() ? null : message.getParentTxId(), |
| message.getType(), |
| message.getCompensationMethod(), |
| message.getTimeout(), |
| message.getRetryMethod(), |
| message.getRetries(), |
| message.getPayloads().toByteArray() |
| )); |
| |
| responseObserver.onNext(ok ? ALLOW : REJECT); |
| responseObserver.onCompleted(); |
| } |
| |
| @Override |
| public void onGetServerMeta(GrpcServiceConfig request, StreamObserver<ServerMeta> responseObserver){ |
| responseObserver.onNext(this.serverMeta); |
| responseObserver.onCompleted(); |
| } |
| } |