| /* |
| * 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.flink.runtime.jobmaster; |
| |
| import org.apache.flink.util.AutoCloseableAsync; |
| import org.apache.flink.util.FlinkException; |
| import org.apache.flink.util.concurrent.FutureUtils; |
| |
| import javax.annotation.Nonnull; |
| |
| import java.util.concurrent.CompletableFuture; |
| |
| /** JobMasterServiceProcess is responsible for running a {@link JobMasterService}. */ |
| public interface JobMasterServiceProcess extends AutoCloseableAsync { |
| |
| static JobMasterServiceProcess waitingForLeadership() { |
| return WaitingForLeadership.INSTANCE; |
| } |
| |
| /** True iff the {@link JobMasterService} has been initialized and is running. */ |
| boolean isInitializedAndRunning(); |
| |
| /** |
| * Future which is completed with the {@link JobMasterGateway} once the {@link JobMasterService} |
| * has been created. Upon closing of the process, this future is completed exceptionally if it |
| * is still uncompleted. |
| */ |
| CompletableFuture<JobMasterGateway> getJobMasterGatewayFuture(); |
| |
| /** |
| * Future which is completed with the result of job execution. The job's result can be the |
| * {@link JobManagerRunnerResult}, {@link JobNotFinishedException} if the job was not finished |
| * or an {@link Throwable} if an unexpected failure occurs. Upon closing of the process, this |
| * future is completed exceptionally with {@link JobNotFinishedException}. |
| */ |
| CompletableFuture<JobManagerRunnerResult> getResultFuture(); |
| |
| /** Future which is completed with the {@link JobMasterService} address once it is created. */ |
| CompletableFuture<String> getLeaderAddressFuture(); |
| |
| enum WaitingForLeadership implements JobMasterServiceProcess { |
| INSTANCE; |
| |
| @Override |
| public CompletableFuture<Void> closeAsync() { |
| return FutureUtils.completedVoidFuture(); |
| } |
| |
| @Override |
| public boolean isInitializedAndRunning() { |
| return false; |
| } |
| |
| @Override |
| public CompletableFuture<JobMasterGateway> getJobMasterGatewayFuture() { |
| return failedOperationFuture(); |
| } |
| |
| @Override |
| public CompletableFuture<JobManagerRunnerResult> getResultFuture() { |
| return failedOperationFuture(); |
| } |
| |
| @Override |
| public CompletableFuture<String> getLeaderAddressFuture() { |
| return failedOperationFuture(); |
| } |
| |
| @Nonnull |
| private <T> CompletableFuture<T> failedOperationFuture() { |
| return FutureUtils.completedExceptionally( |
| new FlinkException("Still waiting for the leadership.")); |
| } |
| } |
| } |