/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.geronimo.naming.reference;
import java.util.List;
import java.util.Set;
import java.util.Collections;
import javax.naming.NamingException;
import javax.naming.NameNotFoundException;
import org.apache.geronimo.kernel.Kernel;
import org.apache.geronimo.kernel.GBeanNotFoundException;
import org.apache.geronimo.kernel.repository.Artifact;
import org.apache.geronimo.kernel.config.Configuration;
import org.apache.geronimo.kernel.config.ConfigurationManager;
import org.apache.geronimo.kernel.config.ConfigurationUtil;
import org.apache.geronimo.gbean.AbstractName;
import org.apache.geronimo.gbean.AbstractNameQuery;
/**
* @version $Rev: 720842 $ $Date: 2008-11-26 21:18:49 +0800 (Wed, 26 Nov 2008) $
*/
public abstract class AbstractEntryFactory<T, S> implements EntryFactory<T> {
private static final long serialVersionUID = 7642216668523441421L;
private final Artifact[] configId;
private final Set<AbstractNameQuery> abstractNameQueries;
private final Class<S> gbeanClass;
protected AbstractEntryFactory(Artifact[] configId, AbstractNameQuery abstractNameQuery, Class<S> gbeanClass) {
this(configId, Collections.singleton(abstractNameQuery), gbeanClass);
}
protected AbstractEntryFactory(Artifact[] configId, Set<AbstractNameQuery> abstractNameQueries, Class<S> gbeanClass) {
if (configId == null || configId.length == 0) {
throw new NullPointerException("No configId");
}
this.configId = configId;
this.abstractNameQueries = abstractNameQueries;
this.gbeanClass = gbeanClass;
}
protected S getGBean(Kernel kernel) throws NamingException {
AbstractName target;
try {
target = resolveTargetName(kernel);
} catch (GBeanNotFoundException e) {
throw (NameNotFoundException) new NameNotFoundException("Could not resolve name query: " + abstractNameQueries).initCause(e);
}
Object proxy;
try {
proxy = kernel.getGBean(target);
} catch (Exception e) {
throw (IllegalStateException) new IllegalStateException("Could not get proxy").initCause(e);
}
if (proxy == null) {
throw new IllegalStateException("Proxy not returned. Target " + target + " not started");
}
checkClass(proxy, gbeanClass);
return (S)proxy;
}
protected void checkClass(Object proxy, Class clazz) {
if (!clazz.isAssignableFrom(proxy.getClass())) {
Class proxyClass = proxy.getClass();
Class[] interfaces = proxyClass.getInterfaces();
StringBuffer message = new StringBuffer();
boolean namesMatch = false;
for (Class anInterface : interfaces) {
if (clazz.getName().equals(anInterface.getName())) {
namesMatch = true;
message.append("Proxy implements correct interface: ").append(clazz.getName()).append(", but classloaders differ\n");
message.append("lookup interface classloader: ").append(clazz.getClassLoader().toString()).append("\n");
message.append("target interface classloader: ").append(anInterface.getClassLoader().toString()).append("\n");
message.append("target proxy classloader: ").append(proxy.getClass().getClassLoader());
break;
}
}
if (!namesMatch) {
message.append("Proxy does not implement an interface named: ").append(clazz.getName());
}
throw new ClassCastException(message.toString());
}
}
public Configuration getConfiguration(Kernel kernel) {
ConfigurationManager configurationManager = ConfigurationUtil.getConfigurationManager(kernel);
Configuration configuration = configurationManager.getConfiguration(configId[0]);
if (configuration == null) {
throw new IllegalStateException("No configuration found for id: " + configId[0]);
}
next: for (int i = 1; i < configId.length; i++) {
List<Configuration> children = configuration.getChildren();
for (Configuration child: children) {
if (child.getId().equals(configId[i])) {
configuration = child;
break next;
}
}
throw new IllegalStateException("No configuration found for id: " + configId[i]);
}
return configuration;
}
public AbstractName resolveTargetName(Kernel kernel) throws GBeanNotFoundException {
Configuration configuration = getConfiguration(kernel);
try {
return configuration.findGBean(abstractNameQueries);
} catch (GBeanNotFoundException e) {
Set results = kernel.listGBeans(abstractNameQueries);
if (results.size() == 1) {
return (AbstractName) results.iterator().next();
}
throw new GBeanNotFoundException("Name query " + abstractNameQueries + " not satisfied in kernel, matches: " + results, e);
}
}
}