+++ /dev/null
-/*
- * Copyright 2005-2010 the original author or authors.
- *
- * Licensed 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.wamblee.test.jndi;
-
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.lang.reflect.Proxy;
-
-import javax.naming.InitialContext;
-import javax.naming.NamingException;
-
-/**
- * Proxy factory that can provide contextual references to objects retrieved
- * from JNDI.
- *
- * NOTE: This class is probably better suited as a production class, not a test support class.
- * It needs to find a new home in a Java EE production utilities library.
- *
- * @param T
- * Interface to proxy.
- * @author Erik Brakkee
- *
- */
-public class JndiProxyFactory<T> {
- /**
- * Exception thrown in case an object cannot be retrieved from JNDI.
- *
- * @author Erik Brakkee
- */
- public static class JndiWiringException extends RuntimeException {
- public JndiWiringException(String aMsg, Throwable aCause) {
- super(aMsg, aCause);
- }
-
- public JndiWiringException(String aMsg) {
- super(aMsg);
- }
- }
-
- /**
- * Invocation handler that does a lookup in JNDI and invokes the method on the
- * object it found.
- *
- * @author Erik Brakkee
- */
- private class JndiInvocationHandler implements InvocationHandler {
-
- @Override
- /**
- * @throws JndiWiringException in case the object could not be retrieved from JNDI.
- */
- public Object invoke(Object aProxy, Method aMethod, Object[] aArgs)
- throws Throwable {
- Object svcObj = null;
- try {
- InitialContext ctx = new InitialContext();
- svcObj = ctx.lookup(jndi);
- } catch (NamingException e) {
- throw new JndiWiringException(
- "Error looking up object in JNDI at '" + jndi + "'", e);
- }
- if (svcObj == null) {
- throw new JndiWiringException("Object at '" + jndi +
- "' is null");
- }
- if (!clazz.isInstance(svcObj)) {
- throw new JndiWiringException("Object in JNDI tree at '" +
- jndi + "' not of type " + clazz.getName() +
- " but of type " + svcObj.getClass().getName());
- }
- T svc = (T) svcObj;
- try {
- return aMethod.invoke(svc, aArgs);
- } catch (InvocationTargetException e) {
- throw e.getCause();
- }
- }
- }
-
- private String jndi;
- private Class clazz;
-
- /**
- * Constructs the factory.
- *
- * @param aClass
- * Interface class of the service to proxy.
- * @param aJndi JNDI name of the object to lookup.
- *
- */
- public JndiProxyFactory(Class<T> aClass, String aJndi) {
- if (!aClass.isInterface()) {
- throw new IllegalArgumentException("Class " + aClass.getName() +
- " is not an interface");
- }
- clazz = aClass;
- jndi = aJndi;
- }
-
- /**
- * Gets the proxy that delegates to the thread-specific instance set by
- * {@link #set(Object)}
- *
- * When at runtime the proxy cannot find lookup the object in JNDI, it
- * throws {@link JndiWiringException}.
- *
- * @return Proxy.
- */
- public T getProxy() {
- InvocationHandler handler = new JndiInvocationHandler();
- Class proxyClass = Proxy.getProxyClass(clazz.getClassLoader(),
- new Class[] { clazz });
- T proxy;
- try {
- proxy = (T) proxyClass.getConstructor(
- new Class[] { InvocationHandler.class }).newInstance(
- new Object[] { handler });
- return proxy;
- } catch (Exception e) {
- throw new RuntimeException("Could not create proxy for " +
- clazz.getName(), e);
- }
- }
-}
git://wamblee.org / utils / blobdiff