diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0-Beta4-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSMessageProcessorUtil.java')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta4-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSMessageProcessorUtil.java | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta4-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSMessageProcessorUtil.java b/sca-java-2.x/tags/2.0-Beta4-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSMessageProcessorUtil.java new file mode 100644 index 0000000000..e96f273d4a --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta4-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSMessageProcessorUtil.java @@ -0,0 +1,127 @@ +/* + * 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.binding.jms.provider; + +import java.lang.reflect.Constructor; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.security.PrivilegedExceptionAction; +import java.security.PrivilegedActionException; + +import org.apache.tuscany.sca.binding.jms.JMSBinding; +import org.apache.tuscany.sca.binding.jms.JMSBindingException; +import org.apache.tuscany.sca.core.ExtensionPointRegistry; +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; + +/** + * Utility methods to load JMS message processors. + * + * @version $Rev$ $Date$ + */ +public class JMSMessageProcessorUtil { + + /** + * Used to create instances of the JMSResourceFactory and RequestMessageProcessor and ResponseMessageProcessor from + * string based class name provided in the configuration + * + * @param cl ClassLoader + * @param className the string based class name to load and instantiate + * @return the new object + */ + private static Object instantiate(ClassLoader cl, final String className, final JMSBinding binding) { + Object instance; + if (cl == null) { + cl = cl = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() { + public ClassLoader run() { + return binding.getClass().getClassLoader(); + } + }); + } + + try { + Class<?> clazz; + + try { + clazz = cl.loadClass(className); + } catch (ClassNotFoundException e) { + try{ + clazz = AccessController.doPrivileged(new PrivilegedExceptionAction<Class>() { + public Class run() throws ClassNotFoundException{ + return binding.getClass().getClassLoader().loadClass(className); + } + }); + } catch (PrivilegedActionException ex) { + throw (ClassNotFoundException) ex.getException(); + } + + } + + Constructor<?> constructor = clazz.getDeclaredConstructor(new Class[] {JMSBinding.class}); + instance = constructor.newInstance(binding); + + } catch (Throwable e) { + throw new JMSBindingException("Exception instantiating OperationAndDataBinding class", e); + } + + return instance; + } + +// public static JMSMessageProcessor getRequestMessageProcessor(JMSBinding binding) { +// return (JMSMessageProcessor)instantiate(null, binding.getRequestMessageProcessorName(), binding); +// } +// +// public static JMSMessageProcessor getResponseMessageProcessor(JMSBinding binding) { +// return (JMSMessageProcessor)instantiate(null, binding.getResponseMessageProcessorName(), binding); +// } +// + private static Object instantiate(ClassLoader cl, String className, JMSBinding binding, ExtensionPointRegistry registry) { + try { + for (ServiceDeclaration sd : registry.getServiceDiscovery().getServiceDeclarations(JMSMessageProcessor.class)) { + if (className.equals(sd.getClassName())) { + final Class<?> clazz = sd.loadClass(); + Constructor<?> constructor; + try { + constructor = AccessController.doPrivileged(new PrivilegedExceptionAction<Constructor<?>>() { + public Constructor<?> run() throws NoSuchMethodException{ + return clazz.getDeclaredConstructor(new Class[] {JMSBinding.class, ExtensionPointRegistry.class}); + } + }); + } catch (PrivilegedActionException ex) { + throw (NoSuchMethodException) ex.getException(); + } + return constructor.newInstance(binding, registry); + } + + } + throw new JMSBindingException("Class not found: " + className); + } catch (Throwable e) { + throw new JMSBindingException("Exception instantiating OperationAndDataBinding class", e); + } + } + + public static JMSMessageProcessor getRequestMessageProcessor(ExtensionPointRegistry registry, JMSBinding binding) { + return (JMSMessageProcessor)instantiate(null, binding.getRequestMessageProcessorName(), binding, registry); + } + + public static JMSMessageProcessor getResponseMessageProcessor(ExtensionPointRegistry registry, JMSBinding binding) { + return (JMSMessageProcessor)instantiate(null, binding.getResponseMessageProcessorName(), binding, registry); + } + +} |