diff options
Diffstat (limited to 'sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoverer.java')
| -rw-r--r-- | sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoverer.java | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoverer.java b/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoverer.java deleted file mode 100644 index a536684b2e..0000000000 --- a/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoverer.java +++ /dev/null @@ -1,359 +0,0 @@ -/* - * 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.extensibility.osgi; - -import java.io.BufferedReader; -import java.io.IOException; -import java.io.InputStream; -import java.io.InputStreamReader; -import java.net.URL; -import java.security.AccessController; -import java.security.PrivilegedAction; -import java.security.PrivilegedActionException; -import java.security.PrivilegedExceptionAction; -import java.security.SecureClassLoader; -import java.util.Collections; -import java.util.Enumeration; -import java.util.HashMap; -import java.util.HashSet; -import java.util.Map; -import java.util.Set; -import java.util.StringTokenizer; -import java.util.logging.Level; -import java.util.logging.Logger; - -import org.apache.tuscany.sca.extensibility.ServiceDeclaration; -import org.apache.tuscany.sca.extensibility.ServiceDiscoverer; -import org.osgi.framework.Bundle; -import org.osgi.framework.BundleContext; - -/** - * The ServiceDiscoverer that find META-INF/services/... in installed bundles - */ -public class OSGiServiceDiscoverer implements ServiceDiscoverer { - private static final Logger logger = Logger.getLogger(OSGiServiceDiscoverer.class.getName()); - private BundleContext context; - private ClassLoader classLoader; - - public OSGiServiceDiscoverer(BundleContext context) { - this.context = context; - this.classLoader = new ClassLoaderImpl(); - } - - /** - * This class loader provides resource access to META-INF/services/... which is used by - * many frameworks. OSGi Import-Package and DynmaicImport-Package headers do not support - * split packages. Another option is to use Require-Bundle header. We can collect the list - * of bundles and add them as required bundles to a special gateway bundle. - */ - public class ClassLoaderImpl extends SecureClassLoader { - - public ClassLoaderImpl() { - super(OSGiServiceDiscoverer.class.getClassLoader()); - } - - /** - * Open a back-door to expose the META-INF/services resources - */ - @Override - protected URL findResource(String name) { - int index = name.lastIndexOf('/'); - if (index == -1) { - return null; - } - String path = name.substring(0, index); - if (path.startsWith("/")) { - path = path.substring(1); - } - - if (!path.startsWith("META-INF/services")) { - return null; - } - - for (Bundle bundle : context.getBundles()) { - URL url = bundle.getEntry(name); - if (url != null) { - return url; - } - } - - return null; - } - - /** - * Open a back-door to expose the META-INF/services resources - */ - @Override - protected Enumeration<URL> findResources(String name) throws IOException { - int index = name.lastIndexOf('/'); - if (index == -1) { - return null; - } - String path = name.substring(0, index); - String file = name.substring(index + 1); - if (path.startsWith("/")) { - path = path.substring(1); - } - - if (!path.startsWith("META-INF/services")) { - return null; - } - - Set<URL> urlSet = new HashSet<URL>(); - - for (Bundle bundle : context.getBundles()) { - Enumeration<URL> urls = bundle.findEntries(path, file, false); - if (urls != null) { - urlSet.addAll(Collections.list(urls)); - } - } - return Collections.enumeration(urlSet); - } - - } - - public static class ServiceDeclarationImpl implements ServiceDeclaration { - private Bundle bundle; - private URL url; - private String className; - private Class<?> javaClass; - private Map<String, String> attributes; - - public ServiceDeclarationImpl(Bundle bundle, URL url, String className, Map<String, String> attributes) { - super(); - this.bundle = bundle; - this.url = url; - this.className = className; - this.attributes = attributes; - } - - public Map<String, String> getAttributes() { - return attributes; - } - - public String getClassName() { - return className; - } - - public Class<?> loadClass() throws ClassNotFoundException { - if (className == null) { - return null; - } - if (javaClass == null) { - javaClass = loadClass(className); - } - return javaClass; - } - - public Class<?> loadClass(String className) throws ClassNotFoundException { - try { - return bundle.loadClass(className); - } catch (ClassNotFoundException e) { - logger.severe(e.getMessage() + ": " + OSGiServiceDiscoverer.toString(bundle)); - throw e; - } - } - - public URL getLocation() { - return url; - } - - public URL getResource(final String name) { - return AccessController.doPrivileged(new PrivilegedAction<URL>() { - public URL run() { - return bundle.getResource(name); - } - }); - } - - @Override - public String toString() { - StringBuffer sb = new StringBuffer(); - sb.append("Bundle: ").append(OSGiServiceDiscoverer.toString(bundle)); - sb.append(" Resource: ").append(url); - sb.append(" Attributes: ").append(attributes); - return sb.toString(); - } - - } - - public static String toString(Bundle b) { - StringBuffer sb = new StringBuffer(); - sb.append(b.getBundleId()).append(" ").append(b.getSymbolicName()); - int s = b.getState(); - if ((s & Bundle.UNINSTALLED) != 0) { - sb.append(" UNINSTALLED"); - } - if ((s & Bundle.INSTALLED) != 0) { - sb.append(" INSTALLED"); - } - if ((s & Bundle.RESOLVED) != 0) { - sb.append(" RESOLVED"); - } - if ((s & Bundle.STARTING) != 0) { - sb.append(" STARTING"); - } - if ((s & Bundle.STOPPING) != 0) { - sb.append(" STOPPING"); - } - if ((s & Bundle.ACTIVE) != 0) { - sb.append(" ACTIVE"); - } - return sb.toString(); - - } - - /** - * Parse a service declaration in the form class;attr=value,attr=value and - * return a map of attributes - * - * @param declaration - * @return a map of attributes - */ - protected static Map<String, String> parseServiceDeclaration(String declaration) { - Map<String, String> attributes = new HashMap<String, String>(); - int index = declaration.indexOf(';'); - if (index != -1) { - attributes.put("class", declaration.substring(0, index).trim()); - declaration = declaration.substring(index); - } else { - int j = declaration.indexOf('='); - if (j == -1) { - attributes.put("class", declaration.trim()); - return attributes; - } else { - declaration = ";" + declaration; - } - } - StringTokenizer tokens = new StringTokenizer(declaration); - for (; tokens.hasMoreTokens();) { - String key = tokens.nextToken("=").substring(1).trim(); - if (key == null) - break; - String value = tokens.nextToken(",").substring(1).trim(); - if (value == null) - break; - attributes.put(key, value); - } - return attributes; - } - - public BundleContext getBundleContext() { - return context; - } - - /** - * This class loader can be set as the thread context class loader for non-OSGi code - * @return - */ - public ClassLoader getContextClassLoader() { - return classLoader; - } - - @SuppressWarnings("unchecked") - public Set<ServiceDeclaration> discover(String serviceName, boolean firstOnly) { - boolean debug = logger.isLoggable(Level.FINE); - Set<ServiceDeclaration> descriptors = new HashSet<ServiceDeclaration>(); - - serviceName = "META-INF/services/" + serviceName; - - // int index = serviceName.lastIndexOf('/'); - // String path = serviceName.substring(0, index); - // String file = serviceName.substring(index + 1); - - // long start = System.currentTimeMillis(); - try { - for (Bundle bundle : context.getBundles()) { - // Enumeration<URL> urls = bundle.findEntries(path, file, false); // This is expensive - final URL url = bundle.getEntry(serviceName); - if (url == null) { - continue; - } - - if (debug) { - logger.fine("Reading service provider file: " + url.toExternalForm()); - } - try { - // Allow privileged access to open URL stream. Add FilePermission to added to security - // policy file. - InputStream is; - try { - is = AccessController.doPrivileged(new PrivilegedExceptionAction<InputStream>() { - public InputStream run() throws IOException { - return url.openStream(); - } - }); - } catch (PrivilegedActionException e) { - throw (IOException)e.getException(); - } - BufferedReader reader = null; - try { - reader = new BufferedReader(new InputStreamReader(is)); - int count = 0; - while (true) { - String line = reader.readLine(); - if (line == null) - break; - line = line.trim(); - if (!line.startsWith("#") && !"".equals(line)) { - String reg = line.trim(); - if (debug) { - logger.fine("Registering service provider: " + reg); - } - - Map<String, String> attributes = parseServiceDeclaration(reg); - String className = attributes.get("class"); - if (className == null) { - // Add a unique class name to prevent equals() from returning true - className = "_class_" + count; - count++; - } - ServiceDeclarationImpl descriptor = - new ServiceDeclarationImpl(bundle, url, className, attributes); - descriptors.add(descriptor); - if (firstOnly) { - return descriptors; - } - } - } - } finally { - if (reader != null) { - try { - reader.close(); - } catch (IOException e) { - // Ignore - } - } - } - } catch (IOException e) { - logger.log(Level.SEVERE, e.getMessage(), e); - } - } - } finally { -// long end = System.currentTimeMillis(); -// if (true) { -// logger.info("Duration: " + (end - start) + " ms"); -// } - } - return descriptors; - - } - -} |