com.hazelcast.internal.cluster.impl.operations.FetchMembersViewOp Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2017, 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.internal.cluster.impl.operations;
import com.hazelcast.internal.cluster.impl.ClusterDataSerializerHook;
import com.hazelcast.internal.cluster.impl.ClusterServiceImpl;
import com.hazelcast.internal.cluster.impl.MembersView;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import java.io.IOException;
/**
* An operation sent by the member that starts mastership claim process to fetch/gather member views of other members.
* Collected member views will be used to decide final, most recent member list.
*
* @since 3.9
*/
public class FetchMembersViewOp extends AbstractClusterOperation implements JoinOperation {
private String targetUuid;
private MembersView membersView;
public FetchMembersViewOp() {
}
public FetchMembersViewOp(String targetUuid) {
this.targetUuid = targetUuid;
}
@Override
public void run() throws Exception {
ClusterServiceImpl service = getService();
String thisUuid = service.getLocalMember().getUuid();
if (!targetUuid.equals(thisUuid)) {
throw new IllegalStateException("Rejecting mastership claim, since target uuid[" + targetUuid
+ "] is not matching local member uuid[" + thisUuid + "].");
}
membersView = service.handleMastershipClaim(getCallerAddress(), getCallerUuid());
}
@Override
public boolean returnsResponse() {
return true;
}
@Override
public Object getResponse() {
return membersView;
}
@Override
public int getId() {
return ClusterDataSerializerHook.FETCH_MEMBER_LIST_STATE;
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
out.writeUTF(targetUuid);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
targetUuid = in.readUTF();
}
}