/*
* 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.multimap.impl.operations;
import com.hazelcast.concurrent.lock.LockWaitNotifyKey;
import com.hazelcast.core.OperationTimeoutException;
import com.hazelcast.multimap.impl.MultiMapContainer;
import com.hazelcast.multimap.impl.MultiMapDataSerializerHook;
import com.hazelcast.multimap.impl.MultiMapService;
import com.hazelcast.multimap.impl.MultiMapWrapper;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.DefaultObjectNamespace;
import com.hazelcast.spi.WaitNotifyKey;
import com.hazelcast.spi.WaitSupport;
public class CountOperation extends MultiMapKeyBasedOperation implements WaitSupport {
public CountOperation() {
}
public CountOperation(String name, Data dataKey) {
super(name, dataKey);
}
public void run() throws Exception {
MultiMapContainer container = getOrCreateContainer();
((MultiMapService) getService()).getLocalMultiMapStatsImpl(name).incrementOtherOperations();
MultiMapWrapper wrapper = container.getMultiMapWrapperOrNull(dataKey);
response = wrapper == null ? 0 : wrapper.getCollection(false).size();
}
public int getId() {
return MultiMapDataSerializerHook.COUNT;
}
@Override
public WaitNotifyKey getWaitKey() {
return new LockWaitNotifyKey(new DefaultObjectNamespace(MultiMapService.SERVICE_NAME, name), dataKey);
}
@Override
public boolean shouldWait() {
MultiMapContainer container = getOrCreateContainer();
if (container.isTransactionallyLocked(dataKey)) {
return !container.canAcquireLock(dataKey, getCallerUuid(), threadId);
}
return false;
}
@Override
public void onWaitExpire() {
getResponseHandler().sendResponse(new OperationTimeoutException("Cannot read transactionally locked entry!"));
}
}