Spring Framework example source code file (ThrowsAdviceInterceptorTests.java)

This example Spring Framework source code file (ThrowsAdviceInterceptorTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

exception, iecho, methodinvocation, methodinvocation, mockcontrol, mythrowshandler, mythrowshandler, object, reflection, rmi, servlet, servletexception, throwable, throwable, throwsadviceinterceptor, throwsadviceinterceptor, transaction, transactionrolledbackexception

The Spring Framework ThrowsAdviceInterceptorTests.java source code

/*
 * Copyright 2002-2005 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.springframework.aop.framework.adapter;

import java.lang.reflect.Method;
import java.rmi.RemoteException;

import javax.servlet.ServletException;
import javax.transaction.TransactionRolledbackException;

import junit.framework.TestCase;
import org.aopalliance.intercept.MethodInvocation;
import org.easymock.MockControl;

import org.springframework.aop.ThrowsAdvice;
import org.springframework.aop.framework.MethodCounter;

/**
 * @author Rod Johnson
 */
public class ThrowsAdviceInterceptorTests extends TestCase {

	public void testNoHandlerMethods() {
		Object o = new Object();
		try {
			new ThrowsAdviceInterceptor(o);
			fail("Should require one handler method at least");
		}
		catch (IllegalArgumentException ex) {
			// Ok
		}
	}
	
	public void testNotInvoked() throws Throwable {
		MyThrowsHandler th = new MyThrowsHandler();
		ThrowsAdviceInterceptor ti = new ThrowsAdviceInterceptor(th);
		Object ret = new Object();
		MockControl mc = MockControl.createControl(MethodInvocation.class);
		MethodInvocation mi = (MethodInvocation) mc.getMock();
		mi.proceed();
		mc.setReturnValue(ret, 1);
		mc.replay();
		assertEquals(ret, ti.invoke(mi));
		assertEquals(0, th.getCalls());
		mc.verify();
	}
	
	public void testNoHandlerMethodForThrowable() throws Throwable {
		MyThrowsHandler th = new MyThrowsHandler();
		ThrowsAdviceInterceptor ti = new ThrowsAdviceInterceptor(th);
		assertEquals(2, ti.getHandlerMethodCount());
		Exception ex = new Exception();
		MockControl mc = MockControl.createControl(MethodInvocation.class);
		MethodInvocation mi = (MethodInvocation) mc.getMock();
		mi.proceed();
		mc.setThrowable(ex);
		mc.replay();
		try {
			ti.invoke(mi);
			fail();
		}
		catch (Exception caught) {
			assertEquals(ex, caught);
		}
		assertEquals(0, th.getCalls());
		mc.verify();
	}
	
	public void testCorrectHandlerUsed() throws Throwable {
		MyThrowsHandler th = new MyThrowsHandler();
		ThrowsAdviceInterceptor ti = new ThrowsAdviceInterceptor(th);
		ServletException ex = new ServletException();
		MockControl mc = MockControl.createControl(MethodInvocation.class);
		MethodInvocation mi = (MethodInvocation) mc.getMock();
		mi.getMethod();
		mc.setReturnValue(Object.class.getMethod("hashCode", (Class[]) null), 1);
		mi.getArguments();
		mc.setReturnValue(null);
		mi.getThis();
		mc.setReturnValue(new Object());
		mi.proceed();
		mc.setThrowable(ex);
		mc.replay();
		try {
			ti.invoke(mi);
			fail();
		}
		catch (Exception caught) {
			assertEquals(ex, caught);
		}
		assertEquals(1, th.getCalls());
		assertEquals(1, th.getCalls("servletException"));
		mc.verify();
	}
	
	public void testCorrectHandlerUsedForSubclass() throws Throwable {
		MyThrowsHandler th = new MyThrowsHandler();
		ThrowsAdviceInterceptor ti = new ThrowsAdviceInterceptor(th);
		// Extends RemoteException
		TransactionRolledbackException ex = new TransactionRolledbackException();
		MockControl mc = MockControl.createControl(MethodInvocation.class);
		MethodInvocation mi = (MethodInvocation) mc.getMock();
		mi.proceed();
		mc.setThrowable(ex);
		mc.replay();
		try {
			ti.invoke(mi);
			fail();
		}
		catch (Exception caught) {
			assertEquals(ex, caught);
		}
		assertEquals(1, th.getCalls());
		assertEquals(1, th.getCalls("remoteException"));
		mc.verify();
	}
	
	public void testHandlerMethodThrowsException() throws Throwable {
		final Throwable t = new Throwable();
		MyThrowsHandler th = new MyThrowsHandler() {
			public void afterThrowing(RemoteException ex) throws Throwable {
				super.afterThrowing(ex);
				throw t;
			}
		};
		ThrowsAdviceInterceptor ti = new ThrowsAdviceInterceptor(th);
		// Extends RemoteException
		TransactionRolledbackException ex = new TransactionRolledbackException();
		MockControl mc = MockControl.createControl(MethodInvocation.class);
		MethodInvocation mi = (MethodInvocation) mc.getMock();
		mi.proceed();
		mc.setThrowable(ex);
		mc.replay();
		try {
			ti.invoke(mi);
			fail();
		}
		catch (Throwable caught) {
			assertEquals(t, caught);
		}
		assertEquals(1, th.getCalls());
		assertEquals(1, th.getCalls("remoteException"));
		mc.verify();
	}
	
	public static class MyThrowsHandler extends MethodCounter implements ThrowsAdvice {
		// Full method signature
		 public void afterThrowing(Method m, Object[] args, Object target, ServletException ex) {
		 	count("servletException");
		 }
		public void afterThrowing(RemoteException ex) throws Throwable {
			count("remoteException");
		 }
		
		/** Not valid, wrong number of arguments */
		public void afterThrowing(Method m, Exception ex) throws Throwable {
			throw new UnsupportedOperationException("Shouldn't be called");
		 }
	}
	
	public interface IEcho {
		int echoException(int i, Throwable t) throws Throwable;
		int getA();
		void setA(int a);
	}
	
	public static class Echo implements IEcho {
		private int a;
		
		public int echoException(int i, Throwable t) throws Throwable {
			if (t != null)
				throw t;
			return i;
		}
		public void setA(int a) {
			this.a = a;
		}
		public int getA() {
			return a;
		}
	}

}