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/*
* 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.tuscany.sca.osgi.runtime;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.service.packageadmin.PackageAdmin;
/**
* Base OSGiRuntime implementation.
*
* @version $Rev$ $Date$
*/
public abstract class OSGiRuntime {
private static final Logger logger = Logger.getLogger(OSGiRuntime.class.getName());
public abstract BundleContext getBundleContext();
public abstract boolean supportsBundleFragments();
protected abstract BundleContext startRuntime(boolean tuscanyRunningInOSGiContainer) throws Exception;
private static OSGiRuntime instance;
private BundleContext bundleContext;
private PackageAdmin packageAdmin;
private boolean tuscanyRunningInOSGiContainer;
private ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
/**
* System property org.apache.tuscany.implementation.osgi.runtime.OSGiRuntime can be set to the
* name of the OSGiRuntime class (eg. EquinoxRuntime). If set, start this runtime and return the
* system bundlecontext. If not set, start Equinox/Felix/Knopflerfish (in that order) from the
* classpath.
*
* @throws BundleException
*/
public static synchronized OSGiRuntime findRuntime() throws Exception {
if (instance != null) {
return instance;
}
String runtimeClassName = System.getProperty(OSGiRuntime.class.getName());
if (runtimeClassName != null) {
try {
Class<?> runtimeClass = OSGiRuntime.class.getClassLoader().loadClass(runtimeClassName);
Method method = runtimeClass.getMethod("getInstance");
instance = (OSGiRuntime) method.invoke(null);
return instance;
} catch (Exception e) {
throw new BundleException("Could not start OSGi runtime " + runtimeClassName, e);
}
}
try {
instance = EquinoxRuntime.getInstance();
return instance;
} catch (ClassNotFoundException e) {
// Ignore
} catch (Throwable e) {
logger.log(Level.SEVERE, e.getMessage(), e);
}
try {
instance = FelixRuntime.getInstance();
return instance;
} catch (ClassNotFoundException e) {
// Ignore
} catch (Throwable e) {
logger.log(Level.SEVERE, e.getMessage(), e);
}
try {
instance = KnopflerfishRuntime.getInstance();
return instance;
} catch (ClassNotFoundException e) {
// Ignore
} catch (Throwable e) {
logger.log(Level.SEVERE, e.getMessage(), e);
}
throw new BundleException("Could not start OSGi runtime from the classpath");
}
public static synchronized OSGiRuntime getRuntime() throws Exception {
return getRuntime(false);
}
public static synchronized OSGiRuntime getRuntime(boolean tuscanyRunningInOSGiContainer) throws Exception {
instance = findRuntime();
if (instance != null) {
if (instance.bundleContext == null) {
instance.tuscanyRunningInOSGiContainer = tuscanyRunningInOSGiContainer;
instance.startRuntime(tuscanyRunningInOSGiContainer);
instance.initialize();
}
return instance;
}
return instance;
}
public void shutdown() throws Exception {
bundleContext = null;
packageAdmin = null;
}
protected void setBundleContext(BundleContext bundleContext) {
instance.tuscanyRunningInOSGiContainer = true;
this.bundleContext = bundleContext;
}
public ClassLoader getContextClassLoader() {
return contextClassLoader;
}
protected void setContextClassLoader(ClassLoader contextClassLoader) {
this.contextClassLoader = contextClassLoader;
}
protected void initialize() {
bundleContext = getBundleContext();
if (bundleContext != null) {
org.osgi.framework.ServiceReference packageAdminReference =
bundleContext.getServiceReference("org.osgi.service.packageadmin.PackageAdmin");
if (packageAdminReference != null) {
packageAdmin = (PackageAdmin)bundleContext.getService(packageAdminReference);
}
}
}
public Bundle findBundle(String bundleSymbolicName, String bundleVersion) {
if (bundleContext != null) {
Bundle[] installedBundles = bundleContext.getBundles();
for (Bundle bundle : installedBundles) {
if (bundleSymbolicName.equals(bundle.getSymbolicName()) && (bundleVersion == null || bundleVersion
.equals(bundle.getHeaders().get("Bundle-Version"))))
return bundle;
}
}
return null;
}
public static synchronized Bundle findInstalledBundle(String bundleLocation) {
if (instance != null) {
if (bundleLocation.startsWith("bundle:")||bundleLocation.startsWith("bundleresource:")) {
try {
return findInstalledBundle(new URL(bundleLocation));
} catch (MalformedURLException e) {
// ignore
}
} else {
return instance.findBundle(bundleLocation);
}
}
return null;
}
public static synchronized Bundle findInstalledBundle(URL bundleURL) {
if (instance != null) {
if (instance.bundleContext != null) {
Bundle[] installedBundles = instance.bundleContext.getBundles();
for (Bundle bundle : installedBundles) {
try {
if (bundle.getEntry("/").getHost().equals(bundleURL.getHost()))
return bundle;
} catch (Exception e) {
// Ignore exception
}
}
}
return null;
}
return null;
}
public Bundle findBundle(String bundleLocation) {
if (bundleContext != null) {
Bundle[] installedBundles = bundleContext.getBundles();
for (Bundle bundle : installedBundles) {
if (bundle.getLocation().equals(bundleLocation))
return bundle;
}
}
return null;
}
public Bundle installBundle(String bundleLocation, InputStream inputStream) {
try {
if (bundleContext != null) {
Bundle bundle = findBundle(bundleLocation);
if (bundle != null)
return bundle;
if (inputStream == null)
bundle = bundleContext.installBundle(bundleLocation);
else
bundle = bundleContext.installBundle(bundleLocation, inputStream);
if (bundle != null && packageAdmin != null)
packageAdmin.refreshPackages(null);
return bundle;
}
} catch (BundleException e) {
}
return null;
}
/**
* Stops the OSGi instance.
*
* @throws Exception Failed to shutdown the OSGi instance.
*/
public static synchronized void stop() throws Exception {
if (instance != null && !instance.tuscanyRunningInOSGiContainer) {
instance.shutdown();
instance = null;
}
}
}
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