/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.runtime.module.artifact.classloader;
import static java.sql.DriverManager.deregisterDriver;
import static java.sql.DriverManager.getDrivers;
import static java.sql.DriverManager.registerDriver;
import static java.util.Collections.list;
import static java.util.Locale.getDefault;
import static org.hamcrest.CoreMatchers.hasItem;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.nullValue;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.mock;
import static org.mule.runtime.module.artifact.classloader.ParentFirstLookupStrategy.PARENT_FIRST;
import org.mule.module.artifact.classloader.DefaultResourceReleaser;
import org.mule.runtime.module.artifact.descriptor.ArtifactDescriptor;
import org.mule.tck.junit4.AbstractMuleTestCase;
import org.mule.tck.size.SmallTest;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.net.URL;
import java.sql.Driver;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import org.junit.Test;
@SmallTest
public class ResourceReleaserTestCase extends AbstractMuleTestCase {
public static final String TEST_RESOURCE_RELEASER_CLASS_LOCATION =
"/org/mule/runtime/module/artifact/classloader/TestResourceReleaser.class";
@Test
public void createdByCorrectArtifactClassLoader() throws Exception {
ensureResourceReleaserIsCreatedByCorrectClassLoader(new TestArtifactClassLoader(new TestArtifactClassLoader(Thread
.currentThread().getContextClassLoader())));
}
@Test
public void createdByCorrectParentArtifactClassLoader() throws Exception {
ensureResourceReleaserIsCreatedByCorrectClassLoader(new TestArtifactClassLoader(Thread.currentThread()
.getContextClassLoader()));
}
@Test
public void notDeregisterJdbcDriversDifferentClassLoaders() throws Exception {
Driver jdbcDriver = mock(Driver.class);
TestArtifactClassLoader classLoader =
new TestArtifactClassLoader(new TestArtifactClassLoader(Thread.currentThread().getContextClassLoader()));
try {
registerDriver(jdbcDriver);
assertThat(list(getDrivers()), hasItem(jdbcDriver));
classLoader.dispose();
assertThat(list(getDrivers()), hasItem(jdbcDriver));
} finally {
deregisterDriver(jdbcDriver);
classLoader.close();
}
}
@Test
public void deregisterJdbcDriversSameClassLoaders() throws Exception {
Driver jdbcDriver = mock(Driver.class);
registerDriver(jdbcDriver);
assertThat(list(getDrivers()), hasItem(jdbcDriver));
new DefaultResourceReleaser().release();
assertThat(list(getDrivers()), not(hasItem(jdbcDriver)));
}
private void ensureResourceReleaserIsCreatedByCorrectClassLoader(MuleArtifactClassLoader classLoader) throws Exception {
assertThat(classLoader.getClass().getClassLoader(), is(Thread.currentThread().getContextClassLoader()));
classLoader.setResourceReleaserClassLocation(TEST_RESOURCE_RELEASER_CLASS_LOCATION);
classLoader.dispose();
// We must call the getClassLoader method from TestResourceReleaser dynamically in order to not load the
// class by the current class loader, if not a java.lang.LinkageError is raised.
ResourceReleaser resourceReleaserInstance = ((KeepResourceReleaserInstance) classLoader).getResourceReleaserInstance();
Method getClassLoaderMethod = resourceReleaserInstance.getClass().getMethod("getClassLoader");
ClassLoader resourceReleaserInstanceClassLoader = (ClassLoader) getClassLoaderMethod.invoke(resourceReleaserInstance);
assertThat(resourceReleaserInstanceClassLoader, is((ClassLoader) classLoader));
}
@Test
public void cleanUpResourcesBundleFromDisposedClassLoader() throws Exception {
TestArtifactClassLoader classLoader = new TestArtifactClassLoader(
new TestArtifactClassLoader(Thread.currentThread()
.getContextClassLoader()));
String resourceReleaserClassLocation = "/".concat(DefaultResourceReleaser.class.getName().replace(".", "/")).concat(".class");
classLoader.setResourceReleaserClassLocation(resourceReleaserClassLocation);
Field cacheListField = ResourceBundle.class.getDeclaredField("cacheList");
cacheListField.setAccessible(true);
((Map) cacheListField.get(null)).clear();
try {
ResourceBundle.getBundle("aBundle", getDefault(), classLoader);
fail("Found a bundle that is not supposed to present for this test");
} catch (MissingResourceException e) {
// Expected
}
classLoader.dispose();
Map actualCacheList = (Map) cacheListField.get(null);
assertThat(actualCacheList.size(), equalTo(0));
Field nonExistentBundleField = ResourceBundle.class.getDeclaredField("NONEXISTENT_BUNDLE");
nonExistentBundleField.setAccessible(true);
ResourceBundle nonExistentBundle = (ResourceBundle) nonExistentBundleField.get(null);
Field cacheKeyField = ResourceBundle.class.getDeclaredField("cacheKey");
cacheKeyField.setAccessible(true);
assertThat(cacheKeyField.get(nonExistentBundle), is(nullValue()));
}
private interface KeepResourceReleaserInstance {
ResourceReleaser getResourceReleaserInstance();
}
private static class TestArtifactClassLoader extends MuleArtifactClassLoader implements KeepResourceReleaserInstance {
private ResourceReleaser resourceReleaserInstance;
public TestArtifactClassLoader(ClassLoader parentCl) {
super("testId", new ArtifactDescriptor("test"), new URL[0], parentCl, new ClassLoaderLookupPolicy() {
@Override
public LookupStrategy getClassLookupStrategy(String className) {
return PARENT_FIRST;
}
@Override
public LookupStrategy getPackageLookupStrategy(String packageName) {
return null;
}
@Override
public ClassLoaderLookupPolicy extend(Map<String, LookupStrategy> lookupStrategies) {
return null;
}
});
}
@Override
protected ResourceReleaser createResourceReleaserInstance() {
resourceReleaserInstance = super.createResourceReleaserInstance();
return resourceReleaserInstance;
}
@Override
public ResourceReleaser getResourceReleaserInstance() {
return resourceReleaserInstance;
}
}
}