/*
 * 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.cache.impl.operation;

import com.hazelcast.cache.impl.CacheDataSerializerHook;
import com.hazelcast.cache.impl.CacheService;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.spi.impl.AbstractNamedOperation;

import javax.cache.configuration.CacheEntryListenerConfiguration;
import java.io.IOException;

/**
 * <p>Listener can be registered and unregistered by {@link com.hazelcast.cache.impl.CacheService}. This operator
 * delegates the request to the cache service.</p>
 */
public class CacheListenerRegistrationOperation
        extends AbstractNamedOperation
        implements IdentifiedDataSerializable {

    private CacheEntryListenerConfiguration cacheEntryListenerConfiguration;
    private boolean register;

    public CacheListenerRegistrationOperation() {
    }

    public CacheListenerRegistrationOperation(String name, CacheEntryListenerConfiguration cacheEntryListenerConfiguration,
                                              boolean register) {
        super(name);
        this.cacheEntryListenerConfiguration = cacheEntryListenerConfiguration;
        this.register = register;
    }

    @Override
    public void run()
            throws Exception {
        final CacheService service = getService();
        if (register) {
            //REGISTER
            service.getCacheConfig(name).addCacheEntryListenerConfiguration(cacheEntryListenerConfiguration);
        } else {
            //UNREGISTER
            service.getCacheConfig(name).removeCacheEntryListenerConfiguration(cacheEntryListenerConfiguration);
        }
    }

    @Override
    public boolean returnsResponse() {
        return true;
    }

    @Override
    public Object getResponse() {
        return null;
    }

    @Override
    protected void writeInternal(ObjectDataOutput out)
            throws IOException {
        super.writeInternal(out);
        out.writeObject(cacheEntryListenerConfiguration);
        out.writeBoolean(register);
    }

    @Override
    protected void readInternal(ObjectDataInput in)
            throws IOException {
        super.readInternal(in);
        cacheEntryListenerConfiguration = in.readObject();
        register = in.readBoolean();
    }

    @Override
    public int getId() {
        return CacheDataSerializerHook.LISTENER_REGISTRATION;
    }

    @Override
    public int getFactoryId() {
        return CacheDataSerializerHook.F_ID;
    }

}

@@ -768,16 +768,57 @@
 ervice;%0A
+import com.hazelcast.config.CacheConfig;%0A
 import c
@@ -2047,87 +2047,283 @@
     
-if (register) %7B%0A            //REGISTER%0A            service.getCacheConfig(name)
+CacheConfig cacheConfig = service.getCacheConfig(name);%0A        if (register) %7B%0A            //REGISTER%0A            if (cacheConfig == null) %7B%0A                throw new IllegalStateException(%22CacheConfig does not exist!!! name: %22 + name);%0A            %7D%0A            cacheConfig
 .add
@@ -2402,16 +2402,41 @@
   %7D else
+ if (cacheConfig != null)
  %7B%0A     
@@ -2467,28 +2467,17 @@
         
-service.getC
+c
 acheConf
@@ -2478,22 +2478,16 @@
 heConfig
-(name)
 .removeC

fix possible NPE