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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.commons.fileupload.servlet;
import  javax.servlet.ServletContext;
import  javax.servlet.ServletContextListener;
import  javax.servlet.ServletContextEvent;
import  org.apache.commons.io.FileCleaningTracker;

A servlet context listener, which ensures that the FileCleaningTracker's reaper thread is terminated, when the web application is destroyed.

Version:
$Id: FileCleanerCleanup.java 1564788 2014-02-05 14:36:41Z markt $
public class FileCleanerCleanup implements ServletContextListener {

    
Attribute name, which is used for storing an instance of FileCleaningTracker in the web application.
    public static final String FILE_CLEANING_TRACKER_ATTRIBUTE
        = FileCleanerCleanup.class.getName() + ".FileCleaningTracker";

    
Returns the instance of FileCleaningTracker, which is associated with the given ServletContext.

Parameters:
pServletContext The servlet context to query
Returns:
The contexts tracker
    public static FileCleaningTracker
            getFileCleaningTracker(ServletContext pServletContext) {
        return (FileCleaningTracker)
            pServletContext.getAttribute();
    }

    
Sets the instance of FileCleaningTracker, which is associated with the given ServletContext.

Parameters:
pServletContext The servlet context to modify
pTracker The tracker to set
    public static void setFileCleaningTracker(ServletContext pServletContext,
            FileCleaningTracker pTracker) {
        pServletContext.setAttribute(pTracker);
    }

    
Called when the web application is initialized. Does nothing.

Parameters:
sce The servlet context, used for calling setFileCleaningTracker(ServletContext, FileCleaningTracker).
    public void contextInitialized(ServletContextEvent sce) {
        setFileCleaningTracker(sce.getServletContext(),
                new FileCleaningTracker());
    }

    
Called when the web application is being destroyed. Calls FileCleaningTracker.exitWhenFinished().

Parameters:
sce The servlet context, used for calling getFileCleaningTracker(ServletContext).
    public void contextDestroyed(ServletContextEvent sce) {
        getFileCleaningTracker(sce.getServletContext()).exitWhenFinished();
    }
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