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/*
* 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.tomcat;
public interface ContextBind {
/**
* Change the current thread context class loader to the web application class loader. If no web application class
* loader is defined, or if the current thread is already using the web application class loader then no change will
* be made. If the class loader is changed and a {@link org.apache.catalina.ThreadBindingListener} is configured
* then {@link org.apache.catalina.ThreadBindingListener#bind()} will be called after the change has been made.
*
* @param originalClassLoader The current class loader if known to save this method having to look it up
*
* @return If the class loader has been changed by the method it will return the thread context class loader in use
* when the method was called. If no change was made then this method returns null.
*/
ClassLoader bind(ClassLoader originalClassLoader);
/**
* Restore the current thread context class loader to the original class loader in used before
* {@link #bind(boolean, ClassLoader)} was called. If no original class loader is passed to this method then no
* change will be made. If the class loader is changed and a {@link org.apache.catalina.ThreadBindingListener} is
* configured then {@link org.apache.catalina.ThreadBindingListener#unbind()} will be called before the change is
* made.
*
* @param originalClassLoader The class loader to restore as the thread context class loader
*/
void unbind(ClassLoader originalClassLoader);
/**
* Change the current thread context class loader to the web application class loader. If no web application class
* loader is defined, or if the current thread is already using the web application class loader then no change will
* be made. If the class loader is changed and a {@link org.apache.catalina.ThreadBindingListener} is configured
* then {@link org.apache.catalina.ThreadBindingListener#bind()} will be called after the change has been made.
*
* @param usePrivilegedAction Unused
* @param originalClassLoader The current class loader if known to save this method having to look it up
*
* @return If the class loader has been changed by the method it will return the thread context class loader in use
* when the method was called. If no change was made then this method returns null.
*
* @deprecated Unused. Will be removed in Tomcat 12 onwards.
*/
@Deprecated
ClassLoader bind(boolean usePrivilegedAction, ClassLoader originalClassLoader);
/**
* Restore the current thread context class loader to the original class loader in used before
* {@link #bind(boolean, ClassLoader)} was called. If no original class loader is passed to this method then no
* change will be made. If the class loader is changed and a {@link org.apache.catalina.ThreadBindingListener} is
* configured then {@link org.apache.catalina.ThreadBindingListener#unbind()} will be called before the change is
* made.
*
* @param usePrivilegedAction Unused
* @param originalClassLoader The class loader to restore as the thread context class loader
*
* @deprecated Unused. Will be removed in Tomcat 12 onwards.
*/
@Deprecated
void unbind(boolean usePrivilegedAction, ClassLoader originalClassLoader);
}
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