geirm 01/09/16 16:55:32 Added: src/java/org/apache/velocity/test ClassloaderChangeTest.java Log: (From Oahu airport :) Test to see if the Introspector dumps the class information cache when the classloader changes. It's pretty simple and rough, but works (and showed a bug in the Introspector :) Revision Changes Path 1.1 jakarta-velocity/src/java/org/apache/velocity/test/ClassloaderChangeTest.java Index: ClassloaderChangeTest.java =================================================================== package org.apache.velocity.test; /* * The Apache Software License, Version 1.1 * * Copyright (c) 2001 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, if * any, must include the following acknowlegement: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowlegement may appear in the software itself, * if and wherever such third-party acknowlegements normally appear. * * 4. The names "The Jakarta Project", "Velocity", and "Apache Software * Foundation" must not be used to endorse or promote products derived * from this software without prior written permission. For written * permission, please contact [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache" * nor may "Apache" appear in their names without prior written * permission of the Apache Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. */ import java.lang.ClassLoader; import java.io.File; import java.io.FileInputStream; import java.io.StringWriter; import org.apache.velocity.app.VelocityEngine; import org.apache.velocity.runtime.RuntimeServices; import org.apache.velocity.VelocityContext; import org.apache.velocity.runtime.log.LogSystem; import org.apache.velocity.util.introspection.Introspector; import junit.framework.TestCase; /** * Tests if we can hand Velocity an arbitrary class for logging. * * @author <a href="mailto:[EMAIL PROTECTED]";>Geir Magnusson Jr.</a> * @version $Id: ClassloaderChangeTest.java,v 1.1 2001/09/16 23:55:32 geirm Exp $ */ public class ClassloaderChangeTest extends TestCase implements LogSystem { private VelocityEngine ve = null; private boolean sawCacheDump = false; private static String OUTPUT = "Hello From Foo"; /** * Default constructor. */ public ClassloaderChangeTest() { super("ClassloaderChangeTest"); try { /* * use an alternative logger. Set it up here and pass it in. */ ve = new VelocityEngine(); ve.setProperty(VelocityEngine.RUNTIME_LOG_LOGSYSTEM, this ); ve.init(); } catch (Exception e) { System.err.println("Cannot setup ClassloaderChnageTest : " + e); System.exit(1); } } public void init( RuntimeServices rs ) { // do nothing with it } public static junit.framework.Test suite () { return new ClassloaderChangeTest(); } /** * Runs the test. */ public void runTest () { sawCacheDump = false; try { VelocityContext vc = new VelocityContext(); Object foo = null; /* * first, we need a classloader to make our foo object */ TestClassloader cl = new TestClassloader(); Class fooclass = cl.loadClass("Foo"); foo = fooclass.newInstance(); /* * put it into the context */ vc.put("foo", foo); /* * and render something that would use it * that will get it into the introspector cache */ StringWriter writer = new StringWriter(); ve.evaluate( vc, writer, "test", "$foo.doIt()"); /* * Check to make sure ok. note the obvious * dependency on the Foo class... */ if ( !writer.toString().equals( OUTPUT )) { fail("Output from doIt() incorrect"); } /* * and do it again :) */ cl = new TestClassloader(); fooclass = cl.loadClass("Foo"); foo = fooclass.newInstance(); vc.put("foo", foo); writer = new StringWriter(); ve.evaluate( vc, writer, "test", "$foo.doIt()"); if ( !writer.toString().equals( OUTPUT )) { fail("Output from doIt() incorrect"); } } catch( Exception ee ) { System.out.println("ClassloaderChangeTest : " + ee ); } if (!sawCacheDump) { fail("Didn't see introspector cache dump."); } } /** * method to catch Velocity log messages. When we * see the introspector dump message, then set the flag */ public void logVelocityMessage(int level, String message) { if (message.equals( Introspector.CACHEDUMP_MSG) ) { sawCacheDump = true; } } } /** * Simple (real simple...) classloader that depends * on a Foo.class being located in the classloader * directory under test */ class TestClassloader extends ClassLoader { private final static String testclass = "../test/classloader/Foo.class"; private Class fooClass = null; public TestClassloader() { try { File f = new File( testclass ); byte[] barr = new byte[ (int) f.length() ]; FileInputStream fis = new FileInputStream( f ); fis.read( barr ); fis.close(); fooClass = defineClass("Foo", barr, 0, barr.length); } catch( Exception e ) { System.out.println("TestClassloader : exception : " + e ); } } public Class findClass(String name) { return fooClass; } }
