Spring Framework example source code file (RequestContextListenerTests.java)

This example Spring Framework source code file (RequestContextListenerTests.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

interruptedexception, mockhttpservletrequest, mockhttpservletrequest, mockrunnable, mockrunnable, mockservletcontext, mockservletcontext, requestcontextlistener, requestcontextlistenertests, servlet, servletrequestevent, servletrequestevent, testcase, thread

The Spring Framework RequestContextListenerTests.java source code

/*
 * Copyright 2002-2007 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.web.context.request;

import javax.servlet.ServletRequestEvent;

import junit.framework.TestCase;

import org.springframework.core.task.MockRunnable;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockServletContext;

/**
 * @author Juergen Hoeller
 */
public class RequestContextListenerTests extends TestCase {

	public void testRequestContextListenerWithSameThread() {
		RequestContextListener listener = new RequestContextListener();
		MockServletContext context = new MockServletContext();
		MockHttpServletRequest request = new MockHttpServletRequest(context);
		request.setAttribute("test", "value");

		assertNull(RequestContextHolder.getRequestAttributes());
		listener.requestInitialized(new ServletRequestEvent(context, request));
		assertNotNull(RequestContextHolder.getRequestAttributes());
		assertEquals("value",
				RequestContextHolder.getRequestAttributes().getAttribute("test", RequestAttributes.SCOPE_REQUEST));
		MockRunnable runnable = new MockRunnable();
		RequestContextHolder.getRequestAttributes().registerDestructionCallback(
				"test", runnable, RequestAttributes.SCOPE_REQUEST);

		listener.requestDestroyed(new ServletRequestEvent(context, request));
		assertNull(RequestContextHolder.getRequestAttributes());
		assertTrue(runnable.wasExecuted());
	}

	public void testRequestContextListenerWithSameThreadAndAttributesGone() {
		RequestContextListener listener = new RequestContextListener();
		MockServletContext context = new MockServletContext();
		MockHttpServletRequest request = new MockHttpServletRequest(context);
		request.setAttribute("test", "value");

		assertNull(RequestContextHolder.getRequestAttributes());
		listener.requestInitialized(new ServletRequestEvent(context, request));
		assertNotNull(RequestContextHolder.getRequestAttributes());
		assertEquals("value",
				RequestContextHolder.getRequestAttributes().getAttribute("test", RequestAttributes.SCOPE_REQUEST));
		MockRunnable runnable = new MockRunnable();
		RequestContextHolder.getRequestAttributes().registerDestructionCallback(
				"test", runnable, RequestAttributes.SCOPE_REQUEST);

		request.clearAttributes();
		listener.requestDestroyed(new ServletRequestEvent(context, request));
		assertNull(RequestContextHolder.getRequestAttributes());
		assertTrue(runnable.wasExecuted());
	}

	public void testRequestContextListenerWithDifferentThread() {
		final RequestContextListener listener = new RequestContextListener();
		final MockServletContext context = new MockServletContext();
		final MockHttpServletRequest request = new MockHttpServletRequest(context);
		request.setAttribute("test", "value");

		assertNull(RequestContextHolder.getRequestAttributes());
		listener.requestInitialized(new ServletRequestEvent(context, request));
		assertNotNull(RequestContextHolder.getRequestAttributes());
		assertEquals("value",
				RequestContextHolder.getRequestAttributes().getAttribute("test", RequestAttributes.SCOPE_REQUEST));
		MockRunnable runnable = new MockRunnable();
		RequestContextHolder.getRequestAttributes().registerDestructionCallback(
				"test", runnable, RequestAttributes.SCOPE_REQUEST);

		// Execute requestDestroyed callback in different thread.
		Thread thread = new Thread() {
			public void run() {
				listener.requestDestroyed(new ServletRequestEvent(context, request));
			}
		};
		thread.start();
		try {
			thread.join();
		}
		catch (InterruptedException ex) {
		}
		// Still bound to original thread, but at least completed.
		assertNotNull(RequestContextHolder.getRequestAttributes());
		assertTrue(runnable.wasExecuted());

		// Check that a repeated execution in the same thread works and performs cleanup.
		listener.requestInitialized(new ServletRequestEvent(context, request));
		listener.requestDestroyed(new ServletRequestEvent(context, request));
		assertNull(RequestContextHolder.getRequestAttributes());
	}

}