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Diffstat (limited to 'sca-java-2.x/tags/2.0-Beta2-RC1/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java')
-rw-r--r--sca-java-2.x/tags/2.0-Beta2-RC1/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java337
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diff --git a/sca-java-2.x/tags/2.0-Beta2-RC1/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java b/sca-java-2.x/tags/2.0-Beta2-RC1/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java
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index 122729a2a4..0000000000
--- a/sca-java-2.x/tags/2.0-Beta2-RC1/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java
+++ /dev/null
@@ -1,337 +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.equinox;
-
-import java.io.IOException;
-import java.net.URL;
-import java.security.AccessController;
-import java.security.PrivilegedAction;
-import java.util.Collection;
-import java.util.Enumeration;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
-import org.apache.tuscany.sca.extensibility.ServiceDeclarationParser;
-import org.apache.tuscany.sca.extensibility.ServiceDiscoverer;
-import org.osgi.framework.Bundle;
-import org.osgi.framework.BundleContext;
-import org.osgi.framework.BundleEvent;
-import org.osgi.framework.BundleException;
-import org.osgi.framework.Constants;
-import org.osgi.framework.Version;
-import org.osgi.util.tracker.BundleTracker;
-
-/**
- * A ServiceDiscoverer that find META-INF/services/... in installed bundles
- *
- * @version $Rev$ $Date$
- */
-public class EquinoxServiceDiscoverer implements ServiceDiscoverer {
- private static final Logger logger = Logger.getLogger(EquinoxServiceDiscoverer.class.getName());
-
- private BundleContext context;
- private Version version;
- private BundleTracker bundleTracker;
-
- public EquinoxServiceDiscoverer(BundleContext context) {
- this.context = context;
- Bundle bundle = context.getBundle();
- this.version = getSCAVersion(bundle);
- if (this.version.equals(Version.emptyVersion)) {
- this.version = Version.parseVersion("1.1");
- }
- bundleTracker = new ActiveBundleTracker(context);
- bundleTracker.open();
- }
-
- public void stop() {
- bundleTracker.close();
- }
-
- private Version getSCAVersion(Bundle bundle) {
- String header = (String)bundle.getHeaders().get("SCA-Version");
- return Version.parseVersion(header);
- }
-
- public static class ActiveBundleTracker extends BundleTracker {
-
- /**
- * @param context
- * @param stateMask
- * @param customizer
- */
- public ActiveBundleTracker(BundleContext context) {
- super(context, Bundle.RESOLVED | Bundle.ACTIVE | Bundle.STARTING, null);
- }
-
- @Override
- public Object addingBundle(Bundle bundle, BundleEvent event) {
- if (event != null && event.getType() == BundleEvent.STOPPED) {
- return null;
- }
- return super.addingBundle(bundle, event);
- }
-
- }
-
- 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 {
- return bundle.loadClass(className);
- }
-
- 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(EquinoxServiceDiscoverer.toString(bundle));
- sb.append(" Resource: ").append(url);
- sb.append(" Attributes: ").append(attributes);
- return sb.toString();
- }
-
- public Bundle getBundle() {
- return bundle;
- }
-
- public boolean isAssignableTo(Class<?> serviceType) {
- try {
- loadClass();
- } catch (ClassNotFoundException e) {
- // Ignore
- }
- return (javaClass != null && serviceType.isAssignableFrom(javaClass));
- }
-
- @Override
- public Enumeration<URL> getResources(final String name) throws IOException {
- return (Enumeration<URL>) bundle.getResources(name);
- }
-
- }
-
- /**
- * Empty static method to trigger the activation of this bundle.
- */
- public static void init() {
- }
-
- private 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();
-
- }
-
- public ServiceDeclaration getServiceDeclaration(String name) throws IOException {
- Collection<ServiceDeclaration> declarations = getServiceDeclarations(name);
- if (declarations.isEmpty()) {
- return null;
- } else {
- return declarations.iterator().next();
- }
- }
-
- private boolean isProviderBundle(Bundle bundle, boolean isTuscanyService) {
- if (bundle.getBundleId() == 0 || bundle.getSymbolicName().startsWith("1.x-osgi-bundle")
- || bundle.getHeaders().get(Constants.FRAGMENT_HOST) != null) {
- // Skip system bundle as it has access to the application classloader
- // Skip the 1.x runtime bundle as this has 1.x services in it
- // For testing running 1.x and 2.x in same VM.
- // Don't know what final form will be yet.
- // Skip bundle fragments too
- return false;
- }
- // FIXME: [rfeng] What bundles should be searched? ACTIVE and STARTING?
- if ((bundle.getState() & Bundle.UNINSTALLED) != 0) {
- return false;
- }
- if (isTuscanyService) {
- Version scaVersion = getSCAVersion(bundle);
- return scaVersion.compareTo(version) == 0;
- }
- return true;
- }
-
- protected Collection<Bundle> getBundles(boolean isTuscanyService) {
- // return bundles.keySet();
- Set<Bundle> set = new HashSet<Bundle>();
- for (Bundle b : context.getBundles()) {
- if (isProviderBundle(b, isTuscanyService)) {
- set.add(b);
- }
- /*
- else {
- if (b.getBundleId() != 0 && isTuscanyService) {
- logger.warning("Bundle is skipped for service discovery: " + toString(b));
- }
- }
- */
- }
- return set;
- }
-
- public Collection<ServiceDeclaration> getServiceDeclarations(String serviceName) throws IOException {
- boolean debug = logger.isLoggable(Level.FINE);
- Collection<ServiceDeclaration> descriptors = new HashSet<ServiceDeclaration>();
-
- // http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/xpath/XPathFactory.html
- boolean isPropertyFile = "javax.xml.xpath.XPathFactory".equals(serviceName);
- boolean isTuscanyService = serviceName.startsWith("org.apache.tuscany.sca.");
-
- if (serviceName.startsWith("/")) {
- // If the service name starts with /, treat it as the entry name
- serviceName = serviceName.substring(1);
- } else {
- // Use JDK SPI pattern
- serviceName = "META-INF/services/" + serviceName;
- }
-
- Set<URL> visited = new HashSet<URL>();
- //System.out.println(">>>> getServiceDeclarations()");
- for (Bundle bundle : getBundles(isTuscanyService)) {
- // if (!isProviderBundle(bundle)) {
- // continue;
- // }
- Enumeration<URL> urls = null;
- try {
- // Use getResources to find resources on the classpath of the bundle
- // Please note there are cases that getResources will return null even
- // the bundle containing such entries:
- // 1. There is a match on Import-Package or DynamicImport-Package, and another
- // bundle exports the resource package, there is a possiblity that it doesn't
- // find the containing entry
- // 2. The bundle cannot be resolved, then getResources will return null
- urls = bundle.getResources(serviceName);
- if (urls == null) {
- URL entry = bundle.getEntry(serviceName);
- if (entry != null) {
- logger.warning("Unresolved resource " + serviceName + " found in bundle: " + toString(bundle));
- try {
- bundle.start();
- } catch (BundleException e) {
- logger.log(Level.SEVERE, "Bundle: " + bundle.getSymbolicName() + " - " + e.getMessage(), e);
- }
- // urls = Collections.enumeration(Arrays.asList(entry));
- }
- }
- } catch (IOException e) {
- logger.log(Level.SEVERE, "Bundle: " + bundle.getSymbolicName() + " - " + e.getMessage(), e);
- }
- if (urls == null) {
- continue;
- }
- while (urls.hasMoreElements()) {
- final URL url = urls.nextElement();
-
- if (!visited.add(url)) {
- // The URL has already been processed
- continue;
- }
-
- if (debug) {
- logger.fine("Reading service provider file: " + url.toExternalForm());
- }
- try {
- for (Map<String, String> attributes : ServiceDeclarationParser.load(url, isPropertyFile)) {
- String className = attributes.get("class");
- ServiceDeclarationImpl descriptor =
- new ServiceDeclarationImpl(bundle, url, className, attributes);
- descriptors.add(descriptor);
- }
- } catch (IOException e) {
- logger.log(Level.SEVERE, "Bundle: " + bundle.getSymbolicName() + " - " + e.getMessage(), e);
- }
- }
- }
- return descriptors;
- }
-
- public ClassLoader getContextClassLoader() {
- // Get the bundle classloader for the extensibility bundle that has DynamicImport-Package *
- return getClass().getClassLoader();
- }
-
-}
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