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Camel HazelCast based work queue implementation

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.camel.component.hazelcast.multimap;

import java.util.UUID;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.multimap.MultiMap;
import org.apache.camel.Endpoint;
import org.apache.camel.Processor;
import org.apache.camel.component.hazelcast.HazelcastDefaultConsumer;
import org.apache.camel.component.hazelcast.listener.CamelEntryListener;

public class HazelcastMultimapConsumer extends HazelcastDefaultConsumer {

    private final MultiMap cache;

    private UUID listener;

    public HazelcastMultimapConsumer(HazelcastInstance hazelcastInstance, Endpoint endpoint, Processor processor,
                                     String cacheName) {
        super(hazelcastInstance, endpoint, processor, cacheName);

        cache = hazelcastInstance.getMultiMap(cacheName);
    }

    @Override
    protected void doStart() throws Exception {
        super.doStart();

        listener = cache.addEntryListener(new CamelEntryListener(this, cacheName), true);
    }

    @Override
    protected void doStop() throws Exception {
        cache.removeEntryListener(listener);

        super.doStop();
    }
}