/*
* 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.collection.client;
import com.hazelcast.client.CallableClientRequest;
import com.hazelcast.client.ClientEndpoint;
import com.hazelcast.client.ClientEngine;
import com.hazelcast.client.RetryableRequest;
import com.hazelcast.collection.CollectionEventFilter;
import com.hazelcast.collection.CollectionPortableHook;
import com.hazelcast.collection.list.ListService;
import com.hazelcast.collection.set.SetService;
import com.hazelcast.core.ItemEvent;
import com.hazelcast.core.ItemEventType;
import com.hazelcast.core.ItemListener;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.nio.serialization.PortableReader;
import com.hazelcast.nio.serialization.PortableWriter;
import com.hazelcast.security.permission.ActionConstants;
import com.hazelcast.security.permission.ListPermission;
import com.hazelcast.security.permission.SetPermission;
import com.hazelcast.spi.EventRegistration;
import com.hazelcast.spi.EventService;
import com.hazelcast.spi.impl.PortableItemEvent;
import java.io.IOException;
import java.security.Permission;
/**
* this class is used to attach a listener to node for collections
*/
public class CollectionAddListenerRequest extends CallableClientRequest implements RetryableRequest {
private String name;
private boolean includeValue;
private String serviceName;
public CollectionAddListenerRequest() {
}
public CollectionAddListenerRequest(String name, boolean includeValue) {
this.name = name;
this.includeValue = includeValue;
}
@Override
public Object call() throws Exception {
final ClientEndpoint endpoint = getEndpoint();
final ClientEngine clientEngine = getClientEngine();
ItemListener listener = new ItemListener() {
@Override
public void itemAdded(ItemEvent item) {
send(item);
}
@Override
public void itemRemoved(ItemEvent item) {
send(item);
}
private void send(ItemEvent event) {
if (endpoint.live()) {
Data item = serializationService.toData(event.getItem());
final ItemEventType eventType = event.getEventType();
final String uuid = event.getMember().getUuid();
PortableItemEvent portableItemEvent = new PortableItemEvent(item, eventType, uuid);
endpoint.sendEvent(portableItemEvent, getCallId());
}
}
};
final EventService eventService = clientEngine.getEventService();
final CollectionEventFilter filter = new CollectionEventFilter(includeValue);
final EventRegistration registration = eventService.registerListener(getServiceName(), name, filter, listener);
final String registrationId = registration.getId();
endpoint.setListenerRegistration(getServiceName(), name, registrationId);
return registrationId;
}
@Override
public String getServiceName() {
return serviceName;
}
public void setServiceName(String serviceName) {
this.serviceName = serviceName;
}
@Override
public int getFactoryId() {
return CollectionPortableHook.F_ID;
}
@Override
public int getClassId() {
return CollectionPortableHook.COLLECTION_ADD_LISTENER;
}
public void write(PortableWriter writer) throws IOException {
writer.writeUTF("n", name);
writer.writeBoolean("i", includeValue);
writer.writeUTF("s", serviceName);
}
public void read(PortableReader reader) throws IOException {
name = reader.readUTF("n");
includeValue = reader.readBoolean("i");
serviceName = reader.readUTF("s");
}
@Override
public Permission getRequiredPermission() {
if (ListService.SERVICE_NAME.equals(serviceName)) {
return new ListPermission(name, ActionConstants.ACTION_LISTEN);
} else if (SetService.SERVICE_NAME.equals(serviceName)) {
return new SetPermission(name, ActionConstants.ACTION_LISTEN);
}
throw new IllegalArgumentException("No service matched!!!");
}
@Override
public String getDistributedObjectName() {
return name;
}
@Override
public String getMethodName() {
return "addItemListener";
}
@Override
public Object[] getParameters() {
return new Object[]{null, includeValue};
}
}