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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.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.Hashtable;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
/**
* Implementation of an OSGi Runtime using Knopflerfish.
*
* @version $Rev$ $Date$
*/
public class KnopflerfishRuntime extends OSGiRuntime {
private static BundleContext bundleContext;
private static KnopflerfishRuntime instance;
private static Class<?> frameworkClass;
private static Object framework;
public static OSGiRuntime getInstance() throws Exception {
if (instance == null) {
frameworkClass = KnopflerfishRuntime.class.getClassLoader().loadClass("org.knopflerfish.framework.Framework");
KnopflerfishRuntime runtime = new KnopflerfishRuntime();
instance = runtime;
}
return instance;
}
// FIXME: Knopflerfish does not expose the methods used for configuration as public methods
// It may be worth using the private methods in org.knopflerfish.framework.Main for
// configuring using reflection if security policies allow it.
// For now, a simple configuration routine reads sca.xargs from the directory in
// the classpath which contains framework.jar. The entries in init.xargs starting with
// -install are assumed to be single-line entries with full bundle location.
//
@Override
protected BundleContext startRuntime(boolean tuscanyRunningInOSGiContainer) throws Exception {
if (bundleContext != null)
return bundleContext;
System.setProperty("org.knopflerfish.framework.bundlestorage", "memory");
Constructor frameworkConstructor = frameworkClass.getConstructor(Object.class);
framework = frameworkConstructor.newInstance(new KnopflerfishRuntime());
Method launchMethod = frameworkClass.getMethod("launch", long.class);
launchMethod.invoke(framework, 0);
Method getContextMethod = frameworkClass.getMethod("getSystemBundleContext");
bundleContext = (BundleContext)getContextMethod.invoke(framework);
System.setProperty("com.gatespace.bundle.cm.store", "knopflerfish.store");
File xargsFile = null;
String classpath = System.getProperty("java.class.path");
String[] classpathEntries = classpath.split(System.getProperty("path.separator"));
for (int i = 0; i < classpathEntries.length; i++) {
if (classpathEntries[i].endsWith("framework.jar")) {
String path = classpathEntries[i].substring(0, classpathEntries[i].length() - "framework.jar".length());
path = path + "sca.xargs";
xargsFile = new File(path);
if (!xargsFile.exists())
xargsFile = null;
break;
}
}
if (xargsFile != null) {
BufferedReader reader = new BufferedReader(new FileReader(xargsFile));
String line;
Hashtable<String, Bundle> bundles = new Hashtable<String, Bundle>();
while ((line = reader.readLine()) != null) {
line = line.trim();
if (line.startsWith("-install")) {
try {
String bundleLocation = line.substring("-install".length()).trim();
Bundle bundle = bundleContext.installBundle(bundleLocation);
bundles.put(bundleLocation, bundle);
} catch (BundleException e) {
e.printStackTrace();
}
}
if (line.startsWith("-start")) {
try {
String bundleLocation = line.substring("-start".length()).trim();
Bundle bundle = bundles.get(bundleLocation);
bundle.start();
} catch (BundleException e) {
e.printStackTrace();
}
}
}
}
return bundleContext;
}
@Override
public BundleContext getBundleContext() {
return bundleContext;
}
@Override
protected void setBundleContext(BundleContext bundleContext) {
super.setBundleContext(bundleContext);
KnopflerfishRuntime.bundleContext = bundleContext;
}
@Override
public void shutdown() throws Exception {
if (bundleContext == null)
return;
bundleContext = null;
instance = null;
if (framework != null) {
Method shutdownMethod = frameworkClass.getMethod("shutdown");
try {
shutdownMethod.invoke(framework);
} catch (Exception e) {
// Ignore errors
}
framework = null;
}
super.shutdown();
}
@Override
public boolean supportsBundleFragments() {
return true;
}
}
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