/*
* Copyright 2007-2010 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.impalaframework.osgi.test;
import java.io.Serializable;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.impalaframework.exception.InvalidStateException;
import org.impalaframework.module.ModuleDefinitionSource;
import org.impalaframework.module.RootModuleDefinition;
import org.impalaframework.util.ObjectUtils;
import org.impalaframework.util.serialize.ClassLoaderAwareSerializationStreamFactory;
import org.impalaframework.util.serialize.SerializationHelper;
import org.impalaframework.util.serialize.SerializationStreamFactory;
import org.osgi.framework.BundleContext;
import org.springframework.osgi.util.BundleDelegatingClassLoader;
/**
* Implementation of {@link ModuleDefinitionSource} which is designed to run
* within an OSGi container. Supports an {@link #inject(Object)} method which is
* designed to be called from <i>outside</i> an OSGi container, through which a
* {@link RootModuleDefinition} can be supplied. It will then use Java
* Serialization to marshal the {@link RootModuleDefinition} such that it is
* usable within OSGi.
*
* @author Phil Zoio
*/
public class InjectableModuleDefinitionSource implements ModuleDefinitionSource {
private static Log logger = LogFactory.getLog(InjectableModuleDefinitionSource.class);
private RootModuleDefinition rootModuleDefinition;
private BundleContext bundleContext;
public InjectableModuleDefinitionSource(BundleContext bundleContext) {
super();
this.bundleContext = bundleContext;
}
public void inject(Object o) {
if (o == null) {
return;
}
if (logger.isDebugEnabled()) {
logger.debug("Capturing root module definition from " + o);
}
if (!(o instanceof Serializable)) {
throw new InvalidStateException("Attempting to inject non-serializable module definition class '" + o.getClass().getName() + "'");
}
final Object clone = clone(o);
try {
rootModuleDefinition = ObjectUtils.cast(clone, RootModuleDefinition.class);
} catch (ClassCastException e) {
logger.error("Error converting to root module definition object " + o + " with class loader " + o.getClass().getClassLoader());
throw e;
}
if (logger.isInfoEnabled()) {
logger.info("Captured root module definition " + rootModuleDefinition);
}
}
Object clone(Object o) {
final BundleDelegatingClassLoader classLoader = BundleDelegatingClassLoader.createBundleClassLoaderFor(bundleContext.getBundle());
final SerializationStreamFactory streamFactory = newStreamFactory(classLoader);
SerializationHelper helper = new SerializationHelper(streamFactory);
final Object clone = helper.clone((Serializable) o);
return clone;
}
SerializationStreamFactory newStreamFactory(ClassLoader classLoader) {
return new ClassLoaderAwareSerializationStreamFactory(classLoader);
}
public RootModuleDefinition getModuleDefinition() {
return rootModuleDefinition;
}
}