diff options
Diffstat (limited to 'java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java')
| -rw-r--r-- | java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java b/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java deleted file mode 100644 index 31a3ae3b9c..0000000000 --- a/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java +++ /dev/null @@ -1,354 +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 static org.apache.tuscany.sca.extensibility.ServiceDeclarationParser.parseDeclaration; - -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.util.Collection; -import java.util.Enumeration; -import java.util.HashMap; -import java.util.HashSet; -import java.util.Map; -import java.util.Properties; -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.ServiceDiscoverer; -import org.osgi.framework.Bundle; -import org.osgi.framework.BundleContext; -import org.osgi.framework.BundleException; -import org.osgi.framework.Constants; -import org.osgi.framework.Version; - -/** - * 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; - - public EquinoxServiceDiscoverer(BundleContext context) { - this.context = context; - Bundle bundle = context.getBundle(); - this.version = getSCAVersion(bundle); - } - - private Version getSCAVersion(Bundle bundle) { - Version scaVersion = Version.emptyVersion; - String header = (String)bundle.getHeaders().get("SCA-Version"); - if (header == null) { - scaVersion = Version.parseVersion("1.1"); - } else { - header = header.trim(); - if (header.equals("")) { - header = "1.1"; - } - scaVersion = Version.parseVersion(header); - } - return scaVersion; - } - - 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)); - } - - } - - /** - * 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) { - 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; - } - if (bundle.getSymbolicName().startsWith("org.apache.tuscany.sca.")) { - Version scaVersion = getSCAVersion(bundle); - return scaVersion.compareTo(version) >= 0; - } - return true; - } - - 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); - serviceName = "META-INF/services/" + serviceName; - - Set<URL> visited = new HashSet<URL>(); - //System.out.println(">>>> getServiceDeclarations()"); - for (Bundle bundle : context.getBundles()) { - 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 " + toString(bundle)); - try { - bundle.start(); - } catch (BundleException e) { - logger.log(Level.SEVERE, e.getMessage(), e); - } - // urls = Collections.enumeration(Arrays.asList(entry)); - } - } - } catch (IOException e) { - logger.log(Level.SEVERE, 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 { - // 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(); - } - if (isPropertyFile) { - // Load as a property file - Properties props = new Properties(); - props.load(is); - is.close(); - for (Map.Entry<Object, Object> e : props.entrySet()) { - Map<String, String> attributes = new HashMap<String, String>(); - String key = (String)e.getKey(); - String value = (String)e.getValue(); - // Unfortunately, the xalan file only has the classname - if ("".equals(value)) { - value = key; - key = ""; - } - if (!"".equals(key)) { - attributes.put(key, value); - attributes.put("uri", key); - } - attributes.putAll(parseDeclaration(value)); - ServiceDeclarationImpl descriptor = new ServiceDeclarationImpl(bundle, url, value, attributes); - descriptors.add(descriptor); - } - continue; - } - 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 = parseDeclaration(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); - } - } - } finally { - if (reader != null) { - try { - reader.close(); - } catch (IOException e) { - // Ignore - } - } - } - } catch (IOException e) { - logger.log(Level.SEVERE, e.getMessage(), e); - } - } - } - return descriptors; - } - - public ClassLoader getContextClassLoader() { - // Get the bundle classloader for the extensibility bundle that has DynamicImport-Package * - return getClass().getClassLoader(); - } - -} |