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.blueprint;
018    
019    import org.apache.camel.CamelContext;
020    import org.apache.camel.Component;
021    import org.apache.camel.core.osgi.OsgiComponentResolver;
022    import org.apache.camel.spi.ComponentResolver;
023    import org.apache.commons.logging.Log;
024    import org.apache.commons.logging.LogFactory;
025    import org.osgi.framework.BundleContext;
026    
027    public class BlueprintComponentResolver extends OsgiComponentResolver {
028    
029        private static final transient Log LOG = LogFactory.getLog(BlueprintComponentResolver.class);
030    
031        public BlueprintComponentResolver(BundleContext bundleContext) {
032            super(bundleContext);
033        }
034    
035        @Override
036        public Component resolveComponent(String name, CamelContext context) throws Exception {
037            try {
038                Object bean = context.getRegistry().lookup(name);
039                if (bean instanceof Component) {
040                    if (LOG.isDebugEnabled()) {
041                        LOG.debug("Found component: " + name + " in registry: " + bean);
042                    }
043                    return (Component) bean;
044                }
045            } catch (Exception e) {
046                LOG.debug("Ignored error looking up bean: " + name + ". Error: " + e);
047            }
048            try {
049                Object bean = context.getRegistry().lookup(".camelBlueprint.componentResolver." + name);
050                if (bean instanceof ComponentResolver) {
051                    if (LOG.isDebugEnabled()) {
052                        LOG.debug("Found component resolver: " + name + " in registry: " + bean);
053                    }
054                    return ((ComponentResolver) bean).resolveComponent(name, context);
055                }
056            } catch (Exception e) {
057                LOG.debug("Ignored error looking up bean: " + name + ". Error: " + e);
058            }
059            return getComponent(name, context);
060        }
061    
062    }