org.apache.flink.runtime.dispatcher.runner.StoppedDispatcherLeaderProcess Maven / Gradle / Ivy
/*
* 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.dispatcher.runner;
import org.apache.flink.runtime.clusterframework.ApplicationStatus;
import org.apache.flink.runtime.dispatcher.DispatcherGateway;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;
/**
* {@link DispatcherLeaderProcess} implementation which is stopped. This class is useful as the
* initial state of the {@link DefaultDispatcherRunner}.
*/
public enum StoppedDispatcherLeaderProcess implements DispatcherLeaderProcess {
INSTANCE;
private static final CompletableFuture TERMINATION_FUTURE =
CompletableFuture.completedFuture(null);
@Override
public void start() {
throw new UnsupportedOperationException("This method should never be called.");
}
@Override
public UUID getLeaderSessionId() {
throw new UnsupportedOperationException("This method should never be called.");
}
@Override
public CompletableFuture getDispatcherGateway() {
throw new UnsupportedOperationException("This method should never be called.");
}
@Override
public CompletableFuture getLeaderAddressFuture() {
throw new UnsupportedOperationException("This method should never be called.");
}
@Override
public CompletableFuture getShutDownFuture() {
throw new UnsupportedOperationException("This method should never be called.");
}
@Override
public CompletableFuture closeAsync() {
return TERMINATION_FUTURE;
}
}