com.hazelcast.collection.impl.txnqueue.operations.TxnRollbackOperation Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, 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.collection.impl.txnqueue.operations;
import com.hazelcast.collection.impl.CollectionTxnUtil;
import com.hazelcast.collection.impl.queue.QueueContainer;
import com.hazelcast.collection.impl.queue.QueueDataSerializerHook;
import com.hazelcast.collection.impl.queue.operations.QueueBackupAwareOperation;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.spi.Notifier;
import com.hazelcast.spi.Operation;
import com.hazelcast.spi.WaitNotifyKey;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import java.io.IOException;
/**
* Rollback operation for the transactional queue.
*/
public class TxnRollbackOperation extends QueueBackupAwareOperation implements Notifier {
private long[] itemIds;
private transient long shouldNotify;
public TxnRollbackOperation() {
}
@SuppressFBWarnings("EI_EXPOSE_REP")
public TxnRollbackOperation(int partitionId, String name, long[] itemIds) {
super(name);
setPartitionId(partitionId);
this.itemIds = itemIds;
}
@Override
public void run() throws Exception {
QueueContainer queueContainer = getContainer();
for (long itemId : itemIds) {
if (CollectionTxnUtil.isRemove(itemId)) {
response = queueContainer.txnRollbackPoll(itemId, false);
} else {
response = queueContainer.txnRollbackOffer(-itemId);
}
}
}
@Override
public boolean shouldBackup() {
return true;
}
@Override
public Operation getBackupOperation() {
return new TxnRollbackBackupOperation(name, itemIds);
}
@Override
public boolean shouldNotify() {
for (long itemId : itemIds) {
shouldNotify += CollectionTxnUtil.isRemove(itemId) ? 1 : -1;
}
return shouldNotify != 0;
}
@Override
public WaitNotifyKey getNotifiedKey() {
QueueContainer queueContainer = getContainer();
if (CollectionTxnUtil.isRemove(shouldNotify)) {
return queueContainer.getOfferWaitNotifyKey();
}
return queueContainer.getPollWaitNotifyKey();
}
@Override
public int getId() {
return QueueDataSerializerHook.TXN_ROLLBACK;
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
super.writeInternal(out);
out.writeLongArray(itemIds);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
super.readInternal(in);
itemIds = in.readLongArray();
}
}