/*
* 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.operation;
import com.hazelcast.concurrent.lock.LockWaitNotifyKey;
import com.hazelcast.core.EntryView;
import com.hazelcast.core.OperationTimeoutException;
import com.hazelcast.map.impl.EntryViews;
import com.hazelcast.map.impl.MapService;
import com.hazelcast.map.impl.RecordStore;
import com.hazelcast.map.impl.record.Record;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.DefaultObjectNamespace;
import com.hazelcast.spi.WaitNotifyKey;
import com.hazelcast.spi.WaitSupport;
public class GetEntryViewOperation extends KeyBasedMapOperation implements WaitSupport {
private EntryView<Data, Data> result;
public GetEntryViewOperation(String name, Data dataKey) {
super(name, dataKey);
}
public GetEntryViewOperation() {
}
public void run() {
MapService mapService = getService();
RecordStore recordStore = mapService.getMapServiceContext().getRecordStore(getPartitionId(), name);
Record record = recordStore.getRecordOrNull(dataKey);
if (record != null) {
result = EntryViews.createSimpleEntryView(record.getKey(),
mapService.getMapServiceContext().toData(record.getValue()), record);
}
}
@Override
public WaitNotifyKey getWaitKey() {
return new LockWaitNotifyKey(new DefaultObjectNamespace(MapService.SERVICE_NAME, name), dataKey);
}
public boolean shouldWait() {
return recordStore.isTransactionallyLocked(dataKey)
&& !recordStore.canAcquireLock(dataKey, getCallerUuid(), getThreadId());
}
@Override
public void onWaitExpire() {
getResponseHandler().sendResponse(new OperationTimeoutException("Cannot read transactionally locked entry!"));
}
@Override
public Object getResponse() {
return result;
}
@Override
public String toString() {
return "GetEntryViewOperation{"
+ '}';
}
}