com.hazelcast.internal.partition.operation.FetchPartitionStateOperation 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.internal.partition.operation;
import com.hazelcast.cluster.Address;
import com.hazelcast.core.MemberLeftException;
import com.hazelcast.internal.partition.InternalPartitionService;
import com.hazelcast.internal.partition.MigrationCycleOperation;
import com.hazelcast.internal.partition.PartitionRuntimeState;
import com.hazelcast.internal.partition.impl.InternalPartitionServiceImpl;
import com.hazelcast.internal.partition.impl.PartitionDataSerializerHook;
import com.hazelcast.logging.ILogger;
import com.hazelcast.spi.exception.CallerNotMemberException;
import com.hazelcast.spi.exception.RetryableHazelcastException;
import com.hazelcast.spi.exception.TargetNotMemberException;
import com.hazelcast.spi.impl.NodeEngine;
import com.hazelcast.spi.impl.operationexecutor.OperationExecutor;
import com.hazelcast.spi.impl.operationservice.CallStatus;
import com.hazelcast.spi.impl.operationservice.ExceptionAction;
import com.hazelcast.spi.impl.operationservice.Offload;
import com.hazelcast.spi.impl.operationservice.UrgentSystemOperation;
import com.hazelcast.spi.impl.operationservice.impl.OperationServiceImpl;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Operation sent by the master to the cluster members to fetch their partition state.
*/
public final class FetchPartitionStateOperation extends AbstractPartitionOperation
implements MigrationCycleOperation {
public FetchPartitionStateOperation() {
}
@Override
public void beforeRun() {
Address caller = getCallerAddress();
Address masterAddress = getNodeEngine().getMasterAddress();
ILogger logger = getLogger();
if (!caller.equals(masterAddress)) {
String msg = caller + " requested our partition table but it's not our known master. " + "Master: " + masterAddress;
logger.warning(msg);
// Master address should be already updated after mastership claim.
throw new IllegalStateException(msg);
}
InternalPartitionServiceImpl service = getService();
if (!service.isMemberMaster(caller)) {
String msg = caller + " requested our partition table but it's not the master known by migration system.";
logger.warning(msg);
// PartitionService has not received result of mastership claim process yet.
// It will learn eventually.
throw new RetryableHazelcastException(msg);
}
}
@Override
public CallStatus call() {
return new OffloadImpl();
}
private final class OffloadImpl extends Offload {
private OffloadImpl() {
super(FetchPartitionStateOperation.this);
}
@Override
public void start() {
NodeEngine nodeEngine = getNodeEngine();
OperationServiceImpl operationService = (OperationServiceImpl) nodeEngine.getOperationService();
OperationExecutor executor = operationService.getOperationExecutor();
int partitionThreadCount = executor.getPartitionThreadCount();
SendPartitionStateTask barrierTask = new SendPartitionStateTask(partitionThreadCount);
executor.executeOnPartitionThreads(barrierTask);
}
}
/**
* SendPartitionStateTask is executed on all partition operation threads
* and sends local partition state to the caller (the master) after
* ensuring all pending/running migration operations are completed.
*/
private final class SendPartitionStateTask implements Runnable, UrgentSystemOperation {
private final AtomicInteger remaining = new AtomicInteger();
private SendPartitionStateTask(int partitionThreadCount) {
remaining.set(partitionThreadCount);
}
@Override
public void run() {
if (remaining.decrementAndGet() == 0) {
InternalPartitionServiceImpl service = getService();
PartitionRuntimeState partitionState = service.createPartitionStateInternal();
sendResponse(partitionState);
}
}
}
@Override
public ExceptionAction onInvocationException(Throwable throwable) {
if (throwable instanceof MemberLeftException
|| throwable instanceof TargetNotMemberException
|| throwable instanceof CallerNotMemberException) {
return ExceptionAction.THROW_EXCEPTION;
}
return super.onInvocationException(throwable);
}
@Override
public String getServiceName() {
return InternalPartitionService.SERVICE_NAME;
}
@Override
public int getClassId() {
return PartitionDataSerializerHook.FETCH_PARTITION_STATE;
}
}