diff options
Diffstat (limited to 'tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility')
4 files changed, 0 insertions, 525 deletions
diff --git a/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java b/tags/java/sca/2.0-M3-RC4/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-RC4/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; - - } - -} diff --git a/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java b/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java deleted file mode 100644 index d7ac8b449f..0000000000 --- a/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java +++ /dev/null @@ -1,70 +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.net.URL; -import java.util.Map; - -/** - * Service declaration using J2SE Jar service provider spec Classes specified - * inside this declaration are loaded using the ClassLoader used to read the - * configuration file corresponding to this declaration. - * - * @version $Rev$ $Date$ - */ -public interface ServiceDeclaration { - /** - * Load a java class in the same context as the service definition - * @param className The class name - * @return The loaded class - * @throws ClassNotFoundException - */ - Class<?> loadClass(String className) throws ClassNotFoundException; - - /** - * Get the java class for the service impl - * @return The java class - */ - Class<?> loadClass() throws ClassNotFoundException; - - /** - * Get all attributes (name=value pairs) defined for the given entry - * @return All attributes keyed by name - */ - Map<String, String> getAttributes(); - - URL getLocation(); - - String getClassName(); - - URL getResource(String name); - - /** - * The service descriptor might be hashed - * @param obj Another object - * @return - */ - boolean equals(Object obj); - /** - * The service descriptor might be hashed - * @return - */ - int hashCode(); -} diff --git a/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.java b/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.java deleted file mode 100644 index 9b939e8228..0000000000 --- a/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.java +++ /dev/null @@ -1,49 +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.IOException; -import java.util.Collection; - -/** - * A SPI that allows different implementations of discovering service declarations - */ -public interface ServiceDiscoverer { - - /** - * Get all service declarations for this interface - * - * @param name - * @return set of service declarations - * @throws IOException - */ - public Collection<ServiceDeclaration> getServiceDeclarations(String name) throws IOException; - - /** - * Get first service declaration class for the given interface - * - * @param name - * @return service implementation class - * @throws IOException - * @throws ClassNotFoundException - */ - public ServiceDeclaration getServiceDeclaration(String name) throws IOException; - -} diff --git a/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java b/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java deleted file mode 100644 index a5048859f0..0000000000 --- a/tags/java/sca/2.0-M3-RC4/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java +++ /dev/null @@ -1,134 +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.IOException; -import java.util.ArrayList; -import java.util.Collection; -import java.util.Collections; -import java.util.Comparator; -import java.util.List; - -/** - * Service discovery for Tuscany based on J2SE Jar service provider spec. - * Services are described using configuration files in META-INF/services. - * Service description specifies a class name followed by optional properties. - * - * - * @version $Rev$ $Date$ - */ -public final class ServiceDiscovery implements ServiceDiscoverer { - private final static ServiceDiscovery INSTANCE = new ServiceDiscovery(); - - private ServiceDiscoverer discoverer; - - private ServiceDiscovery() { - super(); - } - /** - * Get an instance of Service discovery, one instance is created per - * ClassLoader that this class is loaded from - * - * @return - */ - public static ServiceDiscovery getInstance() { - return INSTANCE; - } - - public ServiceDiscoverer getServiceDiscoverer() { - if (discoverer != null) { - return discoverer; - } - try { - // FIXME: This is a hack to trigger the activation of the extensibility-equinox bundle in OSGi - Class.forName("org.apache.tuscany.sca.extensibility.equinox.EquinoxServiceDiscoverer"); - if (discoverer != null) { - return discoverer; - } - } catch (Throwable e) { - } - discoverer = new ContextClassLoaderServiceDiscoverer(); - return discoverer; - } - - public void setServiceDiscoverer(ServiceDiscoverer sd) { - if (discoverer != null) { - throw new IllegalStateException("The ServiceDiscoverer cannot be reset"); - } - discoverer = sd; - } - - public Collection<ServiceDeclaration> getServiceDeclarations(String name) throws IOException { - return getServiceDeclarations(name, false); - } - - public Collection<ServiceDeclaration> getServiceDeclarations(String name, boolean byRanking) throws IOException { - Collection<ServiceDeclaration> declarations = getServiceDiscoverer().getServiceDeclarations(name); - if (!byRanking) { - return declarations; - } - if (!declarations.isEmpty()) { - List<ServiceDeclaration> declarationList = new ArrayList<ServiceDeclaration>(declarations); - Collections.sort(declarationList, ServiceComparator.DESCENDING_ORDER); - return declarationList; - } else { - return Collections.emptyList(); - } - } - - /** - * Get the service declaration. If there are more than one services, the one with highest ranking will - * be returned. - */ - public ServiceDeclaration getServiceDeclaration(final String name) throws IOException { - // ServiceDeclaration service = getServiceDiscoverer().getFirstServiceDeclaration(name); - // return service; - Collection<ServiceDeclaration> declarations = getServiceDeclarations(name, true); - if (!declarations.isEmpty()) { - List<ServiceDeclaration> declarationList = new ArrayList<ServiceDeclaration>(declarations); - Collections.sort(declarationList, ServiceComparator.DESCENDING_ORDER); - return declarationList.get(0); - } else { - return null; - } - } - - /** - * Compare service declarations by ranking - */ - private static class ServiceComparator implements Comparator<ServiceDeclaration> { - private final static Comparator<ServiceDeclaration> DESCENDING_ORDER = new ServiceComparator(); - - public int compare(ServiceDeclaration o1, ServiceDeclaration o2) { - int rank1 = 0; - String r1 = o1.getAttributes().get("ranking"); - if (r1 != null) { - rank1 = Integer.parseInt(r1); - } - int rank2 = 0; - String r2 = o2.getAttributes().get("ranking"); - if (r2 != null) { - rank2 = Integer.parseInt(r2); - } - return rank2 - rank1; // descending - } - } - -} |