diff options
Diffstat (limited to 'sca-java-1.x/tags/1.5-RC0/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java')
-rw-r--r-- | sca-java-1.x/tags/1.5-RC0/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/sca-java-1.x/tags/1.5-RC0/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java b/sca-java-1.x/tags/1.5-RC0/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java deleted file mode 100644 index a95ab253ae..0000000000 --- a/sca-java-1.x/tags/1.5-RC0/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java +++ /dev/null @@ -1,170 +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.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.security.AccessController; -import java.security.PrivilegedAction; -import java.util.HashSet; -import java.util.Set; -import java.util.logging.Level; -import java.util.logging.Logger; - -/** - * 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 class ServiceDiscovery { - private static final Logger logger = Logger.getLogger(ServiceDiscovery.class.getName()); - - private final static ServiceDiscovery INSTANCE = new ServiceDiscovery(); - - private ServiceDiscoverer discoverer; - private Set<ClassLoader> registeredClassLoaders = new HashSet<ClassLoader>(); - - /** - * 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) { - discoverer = new ClassLoaderServiceDiscoverer(); - } - return discoverer; - } - - public void setServiceDiscoverer(ServiceDiscoverer sd) { - if (discoverer != null) { - throw new IllegalStateException("The ServiceDiscoverer cannot be reset"); - } - discoverer = sd; - } - - /** - * @deprecated - * Register a ClassLoader with this discovery mechanism. Tuscany extension - * ClassLoaders are registered here. - * - * @param classLoader - */ - @Deprecated - public synchronized void registerClassLoader(ClassLoader classLoader) { - registeredClassLoaders.add(classLoader); - } - - /** - * @deprecated - * Unregister a ClassLoader with this discovery mechanism. - * - * @param classLoader - */ - @Deprecated - public synchronized void unregisterClassLoader(ClassLoader classLoader) { - registeredClassLoaders.remove(classLoader); - } - - /** - * Get all service declarations for this name - * - * @param name - * @return set of service declarations - * @throws IOException - */ - public Set<ServiceDeclaration> getServiceDeclarations(String name) throws IOException { - Set<ServiceDeclaration> services = getServiceDiscoverer().discover(name, false); - return services; - } - - /** - * Get all service declarations for this interface - * - * @param serviceInterface - * @return set of service declarations - * @throws IOException - */ - public Set<ServiceDeclaration> getServiceDeclarations(Class<?> serviceInterface) throws IOException { - - return getServiceDeclarations(serviceInterface.getName()); - } - - /** - * Load one service implementation class for this interface - * - * @param serviceInterface - * @return service implementation class - * @throws IOException - * @throws ClassNotFoundException - */ - public Class<?> loadFirstServiceClass(final Class<?> serviceInterface) throws IOException, ClassNotFoundException { - // Try System property first - String className = AccessController.doPrivileged(new PrivilegedAction<String>() { - public String run() { - return System.getProperty(serviceInterface.getName()); - } - }); - if (className != null) { - try { - // Try the classloader for the service interface first - return Class.forName(className, false, serviceInterface.getClassLoader()); - } catch (ClassNotFoundException e) { - try { - // Try the thread context classloader - return Class.forName(className, false, Thread.currentThread().getContextClassLoader()); - } catch (ClassNotFoundException ex) { - logger.log(Level.WARNING, ex.getMessage(), ex); - } - } - } - Set<ServiceDeclaration> services = getServiceDiscoverer().discover(serviceInterface.getName(), true); - if (services.isEmpty()) { - return null; - } - return services.iterator().next().loadClass(); - } - - /** - * Create a new instance of a factory service class. - * - * @param serviceInterface - * @return service implementation class - * @throws SecurityException - * @throws NoSuchMethodException - * @throws InvocationTargetException - * @throws IllegalAccessException - */ - public Object newFactoryClassInstance(final Class<?> serviceInterface) throws SecurityException, NoSuchMethodException, InvocationTargetException, IllegalAccessException { - Method newInstanceMethod = serviceInterface.getMethod("newInstance"); - Object factory = newInstanceMethod.invoke(null); - return factory; - } - -} |