Activator.java

/*
 * #%L
 * Talend ESB :: Camel Talend Job Component
 * %%
 * Copyright (C) 2011 - 2014 Talend Inc.
 * %%
 * Licensed 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.
 * #L%
 */

package org.talend.camel.internal;

import java.util.Collection;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.talend.camel.JobResolver;
import org.talend.camel.JobResolverHolder;

import routines.system.api.TalendESBJobFactory;

public class Activator implements BundleActivator, JobResolver {

    private static BundleContext context;

    @Override
    public void start(BundleContext ctx) throws Exception {
        JobResolverHolder.setJobResolver(this);
        Activator.context = ctx;
    }

    @Override
    public void stop(BundleContext ctx) throws Exception {
        Activator.context = null;
    }

    public TalendESBJobFactory getJobService(String fullJobName) throws Exception {
    	return getJobService(null, fullJobName);
    }

    public TalendESBJobFactory getJobService(String jobOwner, String fullJobName) throws Exception {
        if (context != null) {
            final String simpleName = fullJobName.substring(fullJobName.lastIndexOf('.') + 1);
            /*
             * read old version style first
             * see https://jira.talendforge.org/browse/TESB-12909
             */
            Collection<ServiceReference<TalendESBJobFactory>> serviceReferences =
                    context.getServiceReferences(TalendESBJobFactory.class, "(&(name=" + simpleName + ")(type=job))");

            //if no old version style, then read fashion style
            if (null == serviceReferences || serviceReferences.isEmpty()) {
                serviceReferences =
                    context.getServiceReferences(TalendESBJobFactory.class, "(&(name=" + fullJobName + ")(type=job))");
            }

            if (null != serviceReferences && !serviceReferences.isEmpty()) {
            	if (jobOwner == null) {
            		return context.getService(serviceReferences.iterator().next());
            	}
                final String jobBundleName = jobOwner + "_" + simpleName;
            	for (ServiceReference<TalendESBJobFactory> sref : serviceReferences) {
            		final String symName = sref.getBundle().getSymbolicName();
            		final String shortName = symName.substring(symName.lastIndexOf('.') + 1);
            		if (jobBundleName.equals(shortName)) {
            			return context.getService(sref);
            		}
            	}
            }
        }
        return null;
    }
}