001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.processor.loadbalancer;
018    
019    import org.apache.camel.AsyncCallback;
020    import org.apache.camel.Exchange;
021    
022    /**
023     * A default base class for a {@link LoadBalancer} implementation.
024     * <p/>
025     * This implementation is dedicated for simple synchronous load balancers.
026     * <p/>
027     * Consider using the {@link LoadBalancerSupport} if you want to support
028     * the asynchronous routing engine in Camel.
029     *
030     * @version 
031     */
032    public abstract class SimpleLoadBalancerSupport extends LoadBalancerSupport {
033    
034        public boolean process(Exchange exchange, AsyncCallback callback) {
035            try {
036                process(exchange);
037            } catch (Exception e) {
038                exchange.setException(e);
039            }
040            callback.done(true);
041            return true;
042        }
043    
044        public abstract void process(Exchange exchange) throws Exception;
045    }