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//
// ========================================================================
// Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.osgi.boot.internal.serverfactory;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.eclipse.jetty.osgi.boot.OSGiServerConstants;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.osgi.framework.Bundle;
import org.osgi.framework.ServiceEvent;
import org.osgi.framework.ServiceListener;
import org.osgi.framework.ServiceReference;
/**
* JettyServerServiceTracker
*
* Tracks instances of Jetty Servers, and configures them so that they can deploy
* webapps or ContextHandlers discovered from the OSGi environment.
*
*/
public class JettyServerServiceTracker implements ServiceListener, IManagedJettyServerRegistry
{
private static Logger LOG = Log.getLogger(JettyServerServiceTracker.class.getName());
/**
* Servers indexed by PIDs. PIDs are generated by the ConfigurationAdmin
* service.
*/
private Map<String, ServerInstanceWrapper> _serversIndexedByName = new HashMap<String, ServerInstanceWrapper>();
/** The context-handler to deactivate indexed by ServerInstanceWrapper */
private Map<ServiceReference, ServerInstanceWrapper> _indexByServiceReference = new HashMap<ServiceReference, ServerInstanceWrapper>();
/**
* Stops each one of the registered servers.
*/
public void stop()
{
// not sure that this is really useful but here we go.
for (ServerInstanceWrapper wrapper : _serversIndexedByName.values())
{
try
{
wrapper.stop();
}
catch (Throwable t)
{
LOG.warn(t);
}
}
}
/**
* Receives notification that a service has had a lifecycle change.
*
* @param ev The <code>ServiceEvent</code> object.
*/
public void serviceChanged(ServiceEvent ev)
{
ServiceReference sr = ev.getServiceReference();
switch (ev.getType())
{
case ServiceEvent.MODIFIED:
case ServiceEvent.UNREGISTERING:
{
ServerInstanceWrapper instance = unregisterInIndex(ev.getServiceReference());
if (instance != null)
{
try
{
instance.stop();
}
catch (Exception e)
{
LOG.warn(e);
}
}
if (ev.getType() == ServiceEvent.UNREGISTERING)
{
break;
}
else
{
// modified, meaning: we reload it. now that we stopped it;
// we can register it.
}
}
case ServiceEvent.REGISTERED:
{
try
{
Bundle contributor = sr.getBundle();
Server server = (Server) contributor.getBundleContext().getService(sr);
ServerInstanceWrapper wrapper = registerInIndex(server, sr);
Properties props = new Properties();
for (String key : sr.getPropertyKeys())
{
Object value = sr.getProperty(key);
props.put(key, value);
}
wrapper.start(server, props);
}
catch (Exception e)
{
LOG.warn(e);
}
break;
}
}
}
private ServerInstanceWrapper registerInIndex(Server server, ServiceReference sr)
{
String name = (String) sr.getProperty(OSGiServerConstants.MANAGED_JETTY_SERVER_NAME);
if (name == null) { throw new IllegalArgumentException("The property " + OSGiServerConstants.MANAGED_JETTY_SERVER_NAME + " is mandatory"); }
ServerInstanceWrapper wrapper = new ServerInstanceWrapper(name);
_indexByServiceReference.put(sr, wrapper);
_serversIndexedByName.put(name, wrapper);
return wrapper;
}
/**
* Returns the ContextHandler to stop.
*
* @param reg
* @return the ContextHandler to stop.
*/
private ServerInstanceWrapper unregisterInIndex(ServiceReference sr)
{
ServerInstanceWrapper handler = _indexByServiceReference.remove(sr);
if (handler == null)
{
// a warning?
return null;
}
String name = handler.getManagedServerName();
if (name != null)
{
_serversIndexedByName.remove(name);
}
return handler;
}
/**
* @param managedServerName The server name
* @return the corresponding jetty server wrapped with its deployment
* properties.
*/
public ServerInstanceWrapper getServerInstanceWrapper(String managedServerName)
{
return _serversIndexedByName.get(managedServerName == null ? OSGiServerConstants.MANAGED_JETTY_SERVER_DEFAULT_NAME : managedServerName);
}
}
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