/*
* Copyright 2002-2008 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.springframework.remoting.support;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.util.ClassUtils;
/**
* Generic support base class for remote accessor and exporters,
* providing common bean ClassLoader handling.
*
* @author Juergen Hoeller
* @since 2.5.2
*/
public abstract class RemotingSupport implements BeanClassLoaderAware {
/** Logger available to subclasses */
protected final Log logger = LogFactory.getLog(getClass());
private ClassLoader beanClassLoader = ClassUtils.getDefaultClassLoader();
public void setBeanClassLoader(ClassLoader classLoader) {
this.beanClassLoader = classLoader;
}
/**
* Return the ClassLoader that this accessor operates in,
* to be used for deserializing and for generating proxies.
*/
protected ClassLoader getBeanClassLoader() {
return this.beanClassLoader;
}
/**
* Override the thread context ClassLoader with the environment's bean ClassLoader
* if necessary, i.e. if the bean ClassLoader is not equivalent to the thread
* context ClassLoader already.
* @return the original thread context ClassLoader, or <code>null</code> if not overridden
*/
protected ClassLoader overrideThreadContextClassLoader() {
return ClassUtils.overrideThreadContextClassLoader(getBeanClassLoader());
}
/**
* Reset the original thread context ClassLoader if necessary.
* @param original the original thread context ClassLoader,
* or <code>null</code> if not overridden (and hence nothing to reset)
*/
protected void resetThreadContextClassLoader(ClassLoader original) {
if (original != null) {
Thread.currentThread().setContextClassLoader(original);
}
}
}
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