All Downloads are FREE. Search and download functionalities are using the official Maven repository.
Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $
You can buy this project and download/modify it how often you want.
org.talend.camel.internal.Activator Maven / Gradle / Ivy
/*
* #%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.InvalidSyntaxException;
import org.osgi.framework.ServiceEvent;
import org.osgi.framework.ServiceListener;
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 class ServiceReferenceRetriever {
private final String oldFilter;
private final String newFilter;
private final String jobOwner;
private final String simpleName;
private final ServiceListener listener;
private ServiceReference serviceReference = null;
public ServiceReferenceRetriever(final String oldFilter, final String newFilter,
final String jobOwner, final String simpleName) {
super();
this.oldFilter = oldFilter;
this.newFilter = newFilter;
this.jobOwner = jobOwner;
this.simpleName = simpleName;
if (context == null) {
throw new IllegalStateException("Bundle not initialized. ");
}
listener = new ServiceListener() {
@SuppressWarnings("unchecked")
@Override
public void serviceChanged(final ServiceEvent event) {
if (event.getType() == ServiceEvent.REGISTERED) {
setServiceReference(validServiceReference(
(ServiceReference) event.getServiceReference(),
jobOwner, simpleName));
}
}
};
}
public void initialize() throws InvalidSyntaxException {
boolean success = false;
try {
final String filter = "(|" + oldFilter + newFilter + ")";
context.addServiceListener(listener, filter);
Collection> serviceReferences =
getCurrentServiceReferences(oldFilter, newFilter);
setServiceReference(validServiceReference(serviceReferences, jobOwner, simpleName));
success = true;
} finally {
if (!success) {
context.removeServiceListener(listener);
}
}
}
public synchronized ServiceReference getServiceReference(final long timeout) {
try {
if (serviceReference != null) {
return serviceReference;
}
final long endTime = System.currentTimeMillis() + timeout;
while (serviceReference == null) {
final long waitTime = endTime - System.currentTimeMillis();
if (waitTime <= 0) {
break;
}
try {
wait(waitTime);
} catch (InterruptedException e) {
break;
}
}
return serviceReference;
} finally {
context.removeServiceListener(listener);
}
}
private synchronized void setServiceReference(final ServiceReference serviceReference) {
if (this.serviceReference != null || serviceReference == null) {
return;
}
this.serviceReference = serviceReference;
notifyAll();
}
}
private static final long SERVICE_REFERENCE_TIMEOUT = 10000L;
private static BundleContext context;
@Override
public void start(BundleContext ctx) throws Exception {
Activator.context = ctx;
JobResolverHolder.setJobResolver(this);
}
@Override
public void stop(BundleContext ctx) throws Exception {
Activator.context = null;
}
public TalendESBJobFactory getJobService(final String jobOwner, final String fullJobName,
final boolean isMandatory) throws Exception {
final String simpleName = fullJobName.substring(fullJobName.lastIndexOf('.') + 1);
final String oldFilter = "(&(name=" + simpleName + ")(type=job))";
final String newFilter = "(&(name=" + fullJobName + ")(type=job))";
Collection> serviceReferences =
getCurrentServiceReferences(oldFilter, newFilter);
ServiceReference serviceReference =
validServiceReference(serviceReferences, jobOwner, simpleName);
if (serviceReference == null && isMandatory) {
ServiceReferenceRetriever retriever = new ServiceReferenceRetriever(
oldFilter, newFilter, jobOwner, simpleName);
retriever.initialize();
serviceReference = retriever.getServiceReference(SERVICE_REFERENCE_TIMEOUT);
}
return serviceReference == null ? null : context.getService(serviceReference);
}
private static Collection> getCurrentServiceReferences(
final String oldFilter, final String newFilter) throws InvalidSyntaxException {
if (context == null) {
return null;
}
/*
* read old version style first
* see https://jira.talendforge.org/browse/TESB-12909
*/
Collection> serviceReferences =
context.getServiceReferences(TalendESBJobFactory.class, oldFilter);
//if no old version style, then read fashion style
if (null == serviceReferences || serviceReferences.isEmpty()) {
serviceReferences =
context.getServiceReferences(TalendESBJobFactory.class, newFilter);
}
return serviceReferences;
}
private static ServiceReference validServiceReference(
final Collection> serviceReferences,
final String jobOwner, final String simpleName) {
if (serviceReferences == null || serviceReferences.isEmpty()) {
return null;
}
if (jobOwner == null) {
return serviceReferences.iterator().next();
}
final String jobBundleName = jobOwner + "_" + simpleName;
for (ServiceReference sref : serviceReferences) {
final String symName = sref.getBundle().getSymbolicName();
final String shortName = symName.substring(symName.lastIndexOf('.') + 1);
if (jobBundleName.equals(shortName)) {
return sref;
}
}
return null;
}
private static ServiceReference validServiceReference(
final ServiceReference serviceReference,
final String jobOwner, final String simpleName) {
if (serviceReference == null) {
return null;
}
if (jobOwner == null) {
return serviceReference;
}
final String jobBundleName = jobOwner + "_" + simpleName;
final String symName = serviceReference.getBundle().getSymbolicName();
final String shortName = symName.substring(symName.lastIndexOf('.') + 1);
if (jobBundleName.equals(shortName)) {
return serviceReference;
}
return null;
}
}
