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Diffstat (limited to 'tags/java/sca/2.0-M3-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java')
-rw-r--r--tags/java/sca/2.0-M3-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java272
1 files changed, 0 insertions, 272 deletions
diff --git a/tags/java/sca/2.0-M3-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java b/tags/java/sca/2.0-M3-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java
deleted file mode 100644
index 13f967c053..0000000000
--- a/tags/java/sca/2.0-M3-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java
+++ /dev/null
@@ -1,272 +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;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.lang.ref.WeakReference;
-import java.net.URL;
-import java.net.URLConnection;
-import java.security.AccessController;
-import java.security.PrivilegedAction;
-import java.security.PrivilegedActionException;
-import java.security.PrivilegedExceptionAction;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
-import java.util.StringTokenizer;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-/**
- * A ServiceDiscoverer that find META-INF/services/... using the Context ClassLoader.
- *
- * @version $Rev$ $Date$
- */
-public class ContextClassLoaderServiceDiscoverer implements ServiceDiscoverer {
- private static final Logger logger = Logger.getLogger(ContextClassLoaderServiceDiscoverer.class.getName());
-
- public class ServiceDeclarationImpl implements ServiceDeclaration {
- private URL url;
- private String className;
- private Class<?> javaClass;
- private Map<String, String> attributes;
-
- public ServiceDeclarationImpl(URL url, String className, Map<String, String> attributes) {
- super();
- this.url = url;
- this.className = className;
- this.attributes = attributes;
- }
-
- public Map<String, String> getAttributes() {
- return attributes;
- }
-
- public String getClassName() {
- return className;
- }
-
- public URL getLocation() {
- return url;
- }
-
- 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 Class.forName(className, false, classLoaderReference.get());
- }
-
- @Override
- public String toString() {
- StringBuffer sb = new StringBuffer();
- sb.append("ClassLoader: ").append(classLoaderReference.get());
- sb.append(" Attributes: ").append(attributes);
- return sb.toString();
- }
-
- public URL getResource(final String name) {
- return AccessController.doPrivileged(new PrivilegedAction<URL>() {
- public URL run() {
- return classLoaderReference.get().getResource(name);
- }
- });
- }
-
- }
-
- private WeakReference<ClassLoader> classLoaderReference;
-
- public ContextClassLoaderServiceDiscoverer() {
- ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
- this.classLoaderReference = new WeakReference<ClassLoader>(classLoader);
- }
-
- private List<URL> getResources(final String name) throws IOException {
- try {
- return AccessController.doPrivileged(new PrivilegedExceptionAction<List<URL>>() {
- public List<URL> run() throws IOException {
- List<URL> urls = Collections.list(classLoaderReference.get().getResources(name));
- return urls;
- }
- });
- } catch (PrivilegedActionException e) {
- throw (IOException)e.getException();
- }
- }
-
- /**
- * 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
- */
- private 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 ServiceDeclaration getServiceDeclaration(String name) throws IOException {
- Collection<ServiceDeclaration> declarations = getServiceDeclarations(name);
- if (declarations.isEmpty()) {
- return null;
- } else {
- return declarations.iterator().next();
- }
- }
-
- public Collection<ServiceDeclaration> getServiceDeclarations(String serviceName) {
- 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);
- String name = "META-INF/services/" + serviceName;
- boolean debug = logger.isLoggable(Level.FINE);
- try {
- for (final URL url : getResources(name)) {
- if (debug) {
- logger.fine("Reading service provider file: " + url.toExternalForm());
- }
-
- // 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 {
- URLConnection connection = url.openConnection();
- // TUSCANY-2539
- // Don't cache connections by default to stop Tuscany locking contribution jar files
- // done here as this is one of the first places we open a stream and the only way to
- // set the default is to set it on an instance of URLConnection
- connection.setDefaultUseCaches(false);
- connection.setUseCaches(false);
- 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.put("class", value);
- ServiceDeclarationImpl descriptor = new ServiceDeclarationImpl(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 = 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(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;
-
- }
-
-}
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