/*
* 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.queue.impl.operations;
import com.hazelcast.core.ItemEventType;
import com.hazelcast.monitor.impl.LocalQueueStatsImpl;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.queue.impl.QueueContainer;
import com.hazelcast.queue.impl.QueueDataSerializerHook;
import com.hazelcast.spi.Notifier;
import com.hazelcast.spi.Operation;
import com.hazelcast.spi.WaitNotifyKey;
import com.hazelcast.spi.WaitSupport;
import java.io.IOException;
/**
* Contains offer operation for the Queue.
*/
public final class OfferOperation extends QueueBackupAwareOperation
implements WaitSupport, Notifier, IdentifiedDataSerializable {
private Data data;
private long itemId;
public OfferOperation() {
}
public OfferOperation(final String name, final long timeout, final Data data) {
super(name, timeout);
this.data = data;
}
@Override
public void run() {
QueueContainer container = getOrCreateContainer();
if (container.hasEnoughCapacity()) {
itemId = container.offer(data);
response = true;
} else {
response = false;
}
}
@Override
public void afterRun() throws Exception {
LocalQueueStatsImpl stats = getQueueService().getLocalQueueStatsImpl(name);
if (Boolean.TRUE.equals(response)) {
stats.incrementOffers();
publishEvent(ItemEventType.ADDED, data);
} else {
stats.incrementRejectedOffers();
}
}
@Override
public Operation getBackupOperation() {
return new OfferBackupOperation(name, data, itemId);
}
@Override
public boolean shouldBackup() {
return Boolean.TRUE.equals(response);
}
@Override
public boolean shouldNotify() {
return Boolean.TRUE.equals(response);
}
@Override
public WaitNotifyKey getNotifiedKey() {
return getOrCreateContainer().getPollWaitNotifyKey();
}
@Override
public WaitNotifyKey getWaitKey() {
return getOrCreateContainer().getOfferWaitNotifyKey();
}
@Override
public boolean shouldWait() {
QueueContainer container = getOrCreateContainer();
return getWaitTimeout() != 0 && !container.hasEnoughCapacity();
}
@Override
public void onWaitExpire() {
getResponseHandler().sendResponse(Boolean.FALSE);
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
super.writeInternal(out);
out.writeData(data);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
super.readInternal(in);
data = in.readData();
}
@Override
public int getFactoryId() {
return QueueDataSerializerHook.F_ID;
}
@Override
public int getId() {
return QueueDataSerializerHook.OFFER;
}
}