com.hazelcast.cp.internal.raft.impl.state.LeadershipTransferState Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.cp.internal.raft.impl.state;
import com.hazelcast.cp.internal.raft.impl.RaftEndpoint;
import com.hazelcast.spi.impl.InternalCompletableFuture;
import static com.hazelcast.spi.impl.InternalCompletableFuture.completingCallback;
/**
* State maintained by the leader of the Raft group during the leadership
* transfer process.
*/
public class LeadershipTransferState {
private int term;
private RaftEndpoint endpoint;
private InternalCompletableFuture resultFuture;
LeadershipTransferState(int term, RaftEndpoint endpoint, InternalCompletableFuture resultFuture) {
this.term = term;
this.endpoint = endpoint;
this.resultFuture = resultFuture;
}
public int term() {
return term;
}
public RaftEndpoint endpoint() {
return endpoint;
}
public boolean complete(Object value) {
if (value instanceof Throwable) {
return resultFuture.completeExceptionally((Throwable) value);
} else {
return resultFuture.complete(value);
}
}
public void notify(RaftEndpoint targetEndpoint, final InternalCompletableFuture otherFuture) {
if (this.endpoint.equals(targetEndpoint)) {
resultFuture.whenCompleteAsync(completingCallback(otherFuture));
} else {
otherFuture.completeExceptionally(
new IllegalStateException("There is an ongoing leadership transfer process to " + endpoint));
}
}
}