ReloadingClassLoaderTest.java

/**
 * Copyright 2010 Marko Lavikainen
 *
 * 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 net.contextfw.web.application.internal.classloading;

import static net.contextfw.web.application.configuration.Configuration.RELOADABLE_CLASSES;
import static net.contextfw.web.application.configuration.Configuration.VIEW_COMPONENT_ROOT_PACKAGE;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertTrue;

import java.util.Set;

import net.contextfw.web.application.configuration.Configuration;
import net.contextfw.web.application.development.DevelopmentModeListener;
import net.contextfw.web.application.internal.development.ClassLoaderProvider;
import net.contextfw.web.application.internal.development.DevelopmentToolsImpl;
import net.contextfw.web.application.internal.development.InternalDevelopmentTools;
import net.contextfw.web.application.internal.development.ReloadingClassLoader;
import net.contextfw.web.application.internal.development.ReloadingClassLoaderConf;

import org.apache.commons.lang.mutable.MutableBoolean;
import org.junit.Before;
import org.junit.Test;

public class ReloadingClassLoaderTest {

    private Configuration conf;
    
    @Before
    public void setup() {
        conf = Configuration.getDefaults()
                .add(VIEW_COMPONENT_ROOT_PACKAGE, "net.contextfw.views");
    }
    
    @Test
    public void Reloadable_Packages() {
        
        conf = conf
            .add(RELOADABLE_CLASSES.includedPackage("net.contextfw", false))
            .add(RELOADABLE_CLASSES.includedPackage("net.contextfw.web2", false))
            .add(RELOADABLE_CLASSES.includedPackage("net.contextfw", false))
            .add(RELOADABLE_CLASSES.includedPackage("net.contextfw.web"));

        ReloadingClassLoaderConf rConf = new ReloadingClassLoaderConf(conf);
        
        assertTrue(rConf.isInReloadablePackage("net.contextfw.Link"));
        assertTrue(rConf.isInReloadablePackage("net.contextfw.web.SomeClass"));
        assertTrue(rConf.isInReloadablePackage("net.contextfw.web2.SomeClass"));
        assertTrue(rConf.isInReloadablePackage("net.contextfw.web.sub.SomeClass"));
        assertTrue(rConf.isInReloadablePackage("net.contextfw.views.SomeClass"));
        assertTrue(rConf.isInReloadablePackage("net.contextfw.views.sub.SomeClass"));
        
        assertFalse(rConf.isInReloadablePackage("net.contextfw.a.Link"));
        assertFalse(rConf.isInReloadablePackage("net.contextfw.web2.sub.SomeClass"));
        assertFalse(rConf.isInReloadablePackage("net.contextfw.web2.sub.sab.SomeClass"));
        
        Set<String> names = rConf.getReloadablePackageNames();
        assertTrue(names.contains("net.contextfw.web"));
        assertTrue(names.contains("net.contextfw.views"));
    }
    
    @Test
    public void Excluded_Classes() {
        conf = conf
            .add(RELOADABLE_CLASSES.excludedClass(String.class))
            .add(RELOADABLE_CLASSES.excludedClass(ReloadingClassLoader.class));
        
        ReloadingClassLoaderConf rConf = new ReloadingClassLoaderConf(conf);
        Set<Class<?>> classes = rConf.getExcludedClasses();
        assertEquals(2, classes.size());
        assertTrue(classes.contains(String.class));
        assertTrue(classes.contains(ReloadingClassLoader.class));
    }
    
    @Test
    public void Load_Classes() throws ClassNotFoundException {
        
        conf = conf
            .add(RELOADABLE_CLASSES.includedPackage("net.contextfw.web.application.internal.classloading", false))
            .add(RELOADABLE_CLASSES.excludedClass(NonReloadable.class));

        InternalDevelopmentTools tools = new DevelopmentToolsImpl(conf);
        
        final MutableBoolean classesReloaded = new MutableBoolean(false);
        final MutableBoolean resourcesReloaded = new MutableBoolean(false);
        
        tools.addListener(new DevelopmentModeListener() {
            @Override
            public void resourcesReloaded() {
                resourcesReloaded.setValue(true);
            }
            @Override
            public void classesReloaded(ClassLoader classLoader) {
                classesReloaded.setValue(true);
            }
        });
        
        ClassLoader classLoader = tools.reloadClasses();
        tools.reloadResources();
        
        assertTrue(classesReloaded.booleanValue());
        assertTrue(resourcesReloaded.booleanValue());
        
        Class<?> reloadable = 
                classLoader.loadClass("net.contextfw.web.application.internal.classloading.Reloadable");
        
        Class<?> nonReloadable = 
                classLoader.loadClass("net.contextfw.web.application.internal.classloading.NonReloadable");
        
        assertEquals(NonReloadable.class, nonReloadable);
        assertNotSame(Reloadable.class, reloadable);
        
        assertEquals(String.class, classLoader.loadClass("java.lang.String"));
    }
    
    @Test(expected=ClassNotFoundException.class)
    public void Throw_Class_CastException() throws ClassNotFoundException {
        conf = conf
            .add(RELOADABLE_CLASSES.includedPackage("net.contextfw.web.application.internal.classloading", false))
            .add(RELOADABLE_CLASSES.excludedClass(NonReloadable.class));
        
        ClassLoaderProvider provider = new ClassLoaderProvider(
                new ReloadingClassLoaderConf(conf));
        
        ClassLoader classLoader = provider.reload();
        
        classLoader.loadClass("net.contextfw.web.application.internal.classloading.Reloadaple");
    }
}