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 */
017package org.apache.camel.processor;
018
019import java.io.IOException;
020
021import org.apache.camel.CamelContext;
022import org.apache.camel.spi.FactoryFinder;
023import org.apache.camel.spi.SendDynamicAware;
024import org.slf4j.Logger;
025import org.slf4j.LoggerFactory;
026
027public class SendDynamicAwareResolver {
028
029    public static final String RESOURCE_PATH = "META-INF/services/org/apache/camel/send-dynamic/";
030
031    private static final Logger LOG = LoggerFactory.getLogger(SendDynamicAwareResolver.class);
032
033    private FactoryFinder factoryFinder;
034
035    public SendDynamicAware resolve(CamelContext context, String scheme) {
036        String name = scheme;
037
038        // use factory finder to find a custom implementations
039        Class<?> type = null;
040        try {
041            type = findFactory(name, context);
042        } catch (Exception e) {
043            // ignore
044        }
045
046        if (type != null) {
047            if (LOG.isDebugEnabled()) {
048                LOG.debug("Found SendDynamicAware: {} via: {}{}", type.getName(), factoryFinder.getResourcePath(), name);
049            }
050            if (SendDynamicAware.class.isAssignableFrom(type)) {
051                SendDynamicAware answer = (SendDynamicAware) context.getInjector().newInstance(type);
052                answer.setScheme(scheme);
053                return answer;
054            } else {
055                throw new IllegalArgumentException("Type is not a SendDynamicAware implementation. Found: " + type.getName());
056            }
057        }
058
059        return null;
060    }
061
062    private Class<?> findFactory(String name, CamelContext context) throws ClassNotFoundException, IOException {
063        if (factoryFinder == null) {
064            factoryFinder = context.getFactoryFinder(RESOURCE_PATH);
065        }
066        return factoryFinder.findClass(name);
067    }
068
069}