/*
* 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;
import com.hazelcast.core.ItemEventType;
import com.hazelcast.nio.Address;
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.spi.BackupOperation;
import com.hazelcast.spi.EventRegistration;
import com.hazelcast.spi.EventService;
import com.hazelcast.spi.Operation;
import com.hazelcast.spi.PartitionAwareOperation;
import com.hazelcast.spi.exception.RetryableHazelcastException;
import java.io.IOException;
import java.util.Collection;
/**
* This class contains methods for Queue operations
* such as {@link com.hazelcast.queue.AddAllOperation}.
*/
public abstract class QueueOperation extends Operation
implements PartitionAwareOperation, IdentifiedDataSerializable {
protected String name;
protected transient Object response;
private transient QueueContainer container;
protected QueueOperation() {
}
protected QueueOperation(String name) {
this.name = name;
}
protected QueueOperation(String name, long timeoutMillis) {
this.name = name;
setWaitTimeout(timeoutMillis);
}
protected final QueueContainer getOrCreateContainer() {
if (container == null) {
QueueService queueService = getService();
try {
container = queueService.getOrCreateContainer(name, this instanceof BackupOperation);
} catch (Exception e) {
throw new RetryableHazelcastException(e);
}
}
return container;
}
@Override
public final Object getResponse() {
return response;
}
@Override
public final String getServiceName() {
return QueueService.SERVICE_NAME;
}
public final String getName() {
return name;
}
@Override
public void afterRun() throws Exception {
}
@Override
public void beforeRun() throws Exception {
}
@Override
public boolean returnsResponse() {
return true;
}
public boolean hasListener() {
EventService eventService = getNodeEngine().getEventService();
Collection<EventRegistration> registrations = eventService.getRegistrations(getServiceName(), name);
return registrations.size() > 0;
}
public void publishEvent(ItemEventType eventType, Data data) {
EventService eventService = getNodeEngine().getEventService();
Collection<EventRegistration> registrations = eventService.getRegistrations(getServiceName(), name);
Address thisAddress = getNodeEngine().getThisAddress();
for (EventRegistration registration : registrations) {
QueueEventFilter filter = (QueueEventFilter) registration.getFilter();
QueueEvent event = new QueueEvent(name, filter.isIncludeValue() ? data : null, eventType, thisAddress);
eventService.publishEvent(getServiceName(), registration, event, name.hashCode());
}
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
out.writeUTF(name);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
name = in.readUTF();
}
protected QueueService getQueueService() {
return getService();
}
@Override
public int getFactoryId() {
return QueueDataSerializerHook.F_ID;
}
}