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.example.guice.jms;
018    
019    import java.util.Properties;
020    import java.util.Set;
021    
022    import javax.naming.Context;
023    
024    import com.google.inject.Inject;
025    import com.google.inject.Injector;
026    import com.google.inject.Provider;
027    import com.google.inject.ProvisionException;
028    
029    import org.apache.camel.CamelContext;
030    import org.apache.camel.RoutesBuilder;
031    import org.apache.camel.impl.DefaultCamelContext;
032    import org.apache.camel.impl.JndiRegistry;
033    import org.apache.camel.osgi.CamelContextFactory;
034    import org.guiceyfruit.jndi.JndiBindings;
035    import org.guiceyfruit.jndi.internal.JndiContext;
036    import org.osgi.framework.BundleContext;
037    
038    public class OSGiCamelContextProvider implements Provider<CamelContext> {
039        private final CamelContextFactory factory;
040        @Inject
041        private Set<RoutesBuilder> routeBuilders;
042        @Inject
043        private Injector injector;
044        
045        public OSGiCamelContextProvider(BundleContext context) {
046            // In this we can support to run this provider with or without OSGI
047            if (context != null) {
048                factory = new CamelContextFactory();
049                factory.setBundleContext(context);
050            } else {
051                factory = null;
052            }
053        }
054        
055        protected Context getJndiContext() {
056            try {
057                JndiContext context = new JndiContext(null);
058                if (injector != null) {
059                    //Feed the empty properties to get the code work
060                    JndiBindings.bindInjectorAndBindings(context, injector, new Properties());
061                }
062                return context;
063            } catch (Exception e) {
064                throw new ProvisionException("Failed to create JNDI bindings. Reason: " + e, e);
065            }
066        }
067        
068        // set the JndiRegistry to the camel context
069        protected void updateRegistry(DefaultCamelContext camelContext) {
070            camelContext.setRegistry(new JndiRegistry(getJndiContext()));
071        }
072    
073        public CamelContext get() {
074            DefaultCamelContext camelContext;
075            if (factory != null) {
076                camelContext = factory.createContext();
077            } else {
078                camelContext = new DefaultCamelContext();
079            }
080            if (routeBuilders != null) {
081                for (RoutesBuilder builder : routeBuilders) {
082                    try {
083                        camelContext.addRoutes(builder);
084                    } catch (Exception e) {
085                        throw new ProvisionException("Failed to add the router. Reason: " + e, e);
086                    }
087                }
088            }
089            updateRegistry(camelContext);        
090            return camelContext;
091        }
092    
093    }