engines/servicemix-camel/src/main/java/org/apache/servicemix/camel/osgi/OsgiJbiComponent.java

/*
 * 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.servicemix.camel.osgi;

import org.apache.servicemix.camel.CamelComponent;
import org.apache.servicemix.camel.JbiComponent;
import org.osgi.framework.BundleContext;
import org.osgi.framework.FrameworkUtil;
import org.osgi.framework.ServiceReference;


/**
 * OSGi-specific servicemix-camel {@link JbiComponent} implementation that looks up the {@link CamelComponent} in the OSGi Service Registry
 */
public class OsgiJbiComponent extends JbiComponent {

    private BundleContext bundleContext;
    private ServiceReference reference;

    @Override
    public void start() throws Exception {
        super.start();
        // get the servicemix-camel bundle's context
        bundleContext = FrameworkUtil.getBundle(OsgiJbiComponent.class).getBundleContext();
        
        reference = bundleContext.getServiceReference(CamelComponent.class.getName());
        if (reference == null) {
            throw new IllegalStateException(CamelComponent.class.getName() + " not found in the OSGi registry");
        }
        
        CamelComponent component = (CamelComponent) bundleContext.getService(reference);
        setCamelJbiComponent(component);
    }

    @Override
    public void stop() throws Exception {
        super.stop();
        if (reference != null) {
            bundleContext.ungetService(reference);
        }
    }
}