/*
* Copyright (c) 2008-2017, 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.client.impl.protocol.task.set;
import com.hazelcast.client.ClientEndpoint;
import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.impl.protocol.codec.SetAddListenerCodec;
import com.hazelcast.client.impl.protocol.task.AbstractCallableMessageTask;
import com.hazelcast.collection.impl.collection.CollectionEventFilter;
import com.hazelcast.collection.impl.common.DataAwareItemEvent;
import com.hazelcast.collection.impl.set.SetService;
import com.hazelcast.core.ItemEvent;
import com.hazelcast.core.ItemListener;
import com.hazelcast.instance.Node;
import com.hazelcast.nio.Connection;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.security.permission.ActionConstants;
import com.hazelcast.security.permission.SetPermission;
import com.hazelcast.spi.EventRegistration;
import com.hazelcast.spi.EventService;
import java.security.Permission;
/**
* SetAddListenerMessageTask
*/
public class SetAddListenerMessageTask
extends AbstractCallableMessageTask<SetAddListenerCodec.RequestParameters> {
public SetAddListenerMessageTask(ClientMessage clientMessage, Node node, Connection connection) {
super(clientMessage, node, connection);
}
@Override
protected Object call() {
ClientEndpoint endpoint = getEndpoint();
Data partitionKey = serializationService.toData(parameters.name);
ItemListener listener = createItemListener(endpoint, partitionKey);
EventService eventService = clientEngine.getEventService();
CollectionEventFilter filter = new CollectionEventFilter(parameters.includeValue);
EventRegistration registration;
if (parameters.localOnly) {
registration = eventService.registerLocalListener(getServiceName(), parameters.name, filter, listener);
} else {
registration = eventService.registerListener(getServiceName(), parameters.name, filter, listener);
}
String registrationId = registration.getId();
endpoint.addListenerDestroyAction(getServiceName(), parameters.name, registrationId);
return registrationId;
}
private ItemListener createItemListener(final ClientEndpoint endpoint, final Data partitionKey) {
return 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.isAlive()) {
if (!(event instanceof DataAwareItemEvent)) {
throw new IllegalArgumentException("Expecting: DataAwareItemEvent, Found: "
+ event.getClass().getSimpleName());
}
DataAwareItemEvent dataAwareItemEvent = (DataAwareItemEvent) event;
Data item = dataAwareItemEvent.getItemData();
ClientMessage clientMessage =
SetAddListenerCodec.encodeItemEvent(item, event.getMember().getUuid()
, event.getEventType().getType());
sendClientMessage(partitionKey, clientMessage);
}
}
};
}
@Override
protected SetAddListenerCodec.RequestParameters decodeClientMessage(ClientMessage clientMessage) {
return SetAddListenerCodec.decodeRequest(clientMessage);
}
@Override
protected ClientMessage encodeResponse(Object response) {
return SetAddListenerCodec.encodeResponse((String) response);
}
@Override
public String getServiceName() {
return SetService.SERVICE_NAME;
}
@Override
public Object[] getParameters() {
return new Object[]{null, parameters.includeValue};
}
@Override
public Permission getRequiredPermission() {
return new SetPermission(parameters.name, ActionConstants.ACTION_LISTEN);
}
@Override
public String getMethodName() {
return "addItemListener";
}
@Override
public String getDistributedObjectName() {
return parameters.name;
}
}