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Camel HazelCast based work queue implementation

There is a newer version: 4.9.0

/*
 * 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.instance;

import com.hazelcast.core.HazelcastInstance;
import org.apache.camel.Category;
import org.apache.camel.Consumer;
import org.apache.camel.Processor;
import org.apache.camel.Producer;
import org.apache.camel.component.hazelcast.HazelcastCommand;
import org.apache.camel.component.hazelcast.HazelcastDefaultComponent;
import org.apache.camel.component.hazelcast.HazelcastDefaultEndpoint;
import org.apache.camel.spi.UriEndpoint;

/**
 * Consume join/leave events of a cache instance in a Hazelcast cluster.
 */
@UriEndpoint(firstVersion = "2.7.0", scheme = "hazelcast-instance", title = "Hazelcast Instance",
             syntax = "hazelcast-instance:cacheName",
             consumerOnly = true, category = { Category.CACHE, Category.DATAGRID })
public class HazelcastInstanceEndpoint extends HazelcastDefaultEndpoint {

    public HazelcastInstanceEndpoint(HazelcastInstance hazelcastInstance, String uri, HazelcastDefaultComponent component) {
        super(hazelcastInstance, uri, component);
        setCommand(HazelcastCommand.instance);
    }

    @Override
    public Consumer createConsumer(Processor processor) throws Exception {
        HazelcastInstanceConsumer answer = new HazelcastInstanceConsumer(hazelcastInstance, this, processor);
        configureConsumer(answer);
        return answer;
    }

    @Override
    public Producer createProducer() throws Exception {
        throw new UnsupportedOperationException("You cannot send messages to this endpoint: " + getEndpointUri());
    }

}