/*
* 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.qpid.server.plugins;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.felix.framework.Felix;
import org.apache.felix.framework.cache.BundleCache;
import org.apache.felix.framework.util.FelixConstants;
import org.apache.felix.framework.util.StringMap;
import org.apache.qpid.server.exchange.ExchangeType;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleException;
import org.osgi.util.tracker.ServiceTracker;
/**
*
* @author aidan
*
* Provides access to pluggable elements, such as exchanges
*/
public class PluginManager
{
private Felix _felix = null;
private ServiceTracker _exchangeTracker = null;
private Activator _activator = null;
private boolean _empty;
public PluginManager(String plugindir) throws Exception
{
StringMap configMap = new StringMap(false);
// Tell felix it's being embedded
configMap.put(FelixConstants.EMBEDDED_EXECUTION_PROP, "true");
// Add the bundle provided service interface package and the core OSGi
// packages to be exported from the class path via the system bundle.
configMap.put(FelixConstants.FRAMEWORK_SYSTEMPACKAGES, "org.osgi.framework; version=1.3.0,"
+ "org.osgi.service.packageadmin; version=1.2.0," +
"org.osgi.service.startlevel; version=1.0.0," +
"org.osgi.service.url; version=1.0.0," +
"org.apache.qpid.framing; version=0.2.1," +
"org.apache.qpid.server.exchange; version=0.2.1," +
"org.apache.qpid.server.management; version=0.2.1,"+
"org.apache.qpid.protocol; version=0.2.1,"+
"org.apache.qpid.server.virtualhost; version=0.2.1," +
"org.apache.qpid; version=0.2.1," +
"org.apache.qpid.server.queue; version=0.2.1," +
"javax.management.openmbean; version=1.0.0,"+
"javax.management; version=1.0.0,"+
"org.apache.qpid.junit.extensions.util; version=0.6.1,"
);
if (plugindir == null)
{
_empty = true;
return;
}
// Set the list of bundles to load
File dir = new File(plugindir);
if (!dir.exists())
{
_empty = true;
return;
}
StringBuffer pluginJars = new StringBuffer();
if (dir.isDirectory())
{
for (String child : dir.list())
{
if (child.endsWith("jar"))
{
pluginJars.append(String.format(" file:%s%s%s", plugindir,File.separator,child));
}
}
}
if (pluginJars.length() == 0)
{
_empty = true;
return;
}
configMap.put(FelixConstants.AUTO_START_PROP + ".1", pluginJars.toString());
configMap.put(BundleCache.CACHE_PROFILE_DIR_PROP, plugindir);
List<BundleActivator> activators = new ArrayList<BundleActivator>();
_activator = new Activator();
activators.add(_activator);
_felix = new Felix(configMap, activators);
try
{
_felix.start();
_exchangeTracker = new ServiceTracker(_activator.getContext(), ExchangeType.class.getName(), null);
_exchangeTracker.open();
}
catch (BundleException e)
{
throw new Exception("Could not create bundle");
}
}
public Map<String, ExchangeType<?>> getExchanges()
{
if (_empty)
{
return null;
}
Map<String, ExchangeType<?>>exchanges = new HashMap<String, ExchangeType<?>>();
for (Object service : _exchangeTracker.getServices())
{
if (service instanceof ExchangeType<?>)
{
exchanges.put(service.getClass().getName(), (ExchangeType<?>) service);
}
}
return exchanges;
}
}