/*
* Copyright (c) 2008-2013, 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.map.impl.tx;
import com.hazelcast.logging.ILogger;
import com.hazelcast.map.impl.operation.KeyBasedMapOperation;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.BackupAwareOperation;
import com.hazelcast.spi.Operation;
import com.hazelcast.transaction.TransactionException;
import java.io.IOException;
/**
* An operation to prepare transaction by locking the key on the key owner.
*/
public class TxnPrepareOperation extends KeyBasedMapOperation implements BackupAwareOperation {
private static final long LOCK_TTL_MILLIS = 10000L;
String ownerUuid;
protected TxnPrepareOperation(String name, Data dataKey, String ownerUuid) {
super(name, dataKey);
this.ownerUuid = ownerUuid;
}
public TxnPrepareOperation() {
}
@Override
public void run() throws Exception {
if (!recordStore.extendLock(getKey(), ownerUuid, getThreadId(), LOCK_TTL_MILLIS)) {
ILogger logger = getLogger();
logger.severe("Locked: [" + recordStore.isLocked(getKey()) + "], key: [" + getKey() + ']');
throw new TransactionException("Lock is not owned by the transaction! ["
+ recordStore.getLockOwnerInfo(getKey()) + ']');
}
}
@Override
public Object getResponse() {
return Boolean.TRUE;
}
public boolean shouldBackup() {
return true;
}
public final Operation getBackupOperation() {
return new TxnPrepareBackupOperation(name, dataKey, ownerUuid, getThreadId());
}
public final int getAsyncBackupCount() {
return mapContainer.getAsyncBackupCount();
}
public final int getSyncBackupCount() {
return mapContainer.getBackupCount();
}
protected void writeInternal(ObjectDataOutput out) throws IOException {
super.writeInternal(out);
out.writeUTF(ownerUuid);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
super.readInternal(in);
ownerUuid = in.readUTF();
}
@Override
public String toString() {
return "TxnPrepareOperation{"
+ "ownerUuid='" + ownerUuid + '\''
+ '}';
}
}