| career | drupal | java | mac | mysql | perl | scala | uml | unix  

Tomcat example source code file (

This example Tomcat source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

bean, classloader, classloader, container, container, javabean, loader, loader, string, string

The Tomcat source code

 * 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.catalina;

import java.beans.PropertyChangeListener;

 * A <b>Loader represents a Java ClassLoader implementation that can
 * be used by a Container to load class files (within a repository associated
 * with the Loader) that are designed to be reloaded upon request, as well as
 * a mechanism to detect whether changes have occurred in the underlying
 * repository.
 * <p>
 * In order for a <code>Loader implementation to successfully operate
 * with a <code>Context implementation that implements reloading, it
 * must obey the following constraints:
 * <ul>
 * <li>Must implement Lifecycle so that the Context can indicate
 *     that a new class loader is required.
 * <li>The start() method must unconditionally create a new
 *     <code>ClassLoader implementation.
 * <li>The stop() method must throw away its reference to the
 *     <code>ClassLoader previously utilized, so that the class loader,
 *     all classes loaded by it, and all objects of those classes, can be
 *     garbage collected.
 * <li>Must allow a call to stop() to be followed by a call to
 *     <code>start() on the same Loader instance.
 * <li>Based on a policy chosen by the implementation, must call the
 *     <code>Context.reload() method on the owning Context
 *     when a change to one or more of the class files loaded by this class
 *     loader is detected.
 * </ul>
 * @author Craig R. McClanahan
 * @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $

public interface Loader {

    // ------------------------------------------------------------- Properties

     * Execute a periodic task, such as reloading, etc. This method will be
     * invoked inside the classloading context of this container. Unexpected
     * throwables will be caught and logged.
    public void backgroundProcess();

     * Return the Java class loader to be used by this Container.
    public ClassLoader getClassLoader();

     * Return the Container with which this Loader has been associated.
    public Container getContainer();

     * Set the Container with which this Loader has been associated.
     * @param container The associated Container
    public void setContainer(Container container);

     * Return the "follow standard delegation model" flag used to configure
     * our ClassLoader.
    public boolean getDelegate();

     * Set the "follow standard delegation model" flag used to configure
     * our ClassLoader.
     * @param delegate The new flag
    public void setDelegate(boolean delegate);

     * Return descriptive information about this Loader implementation and
     * the corresponding version number, in the format
     * <code><description>/<version>.
    public String getInfo();

     * Return the reloadable flag for this Loader.
    public boolean getReloadable();

     * Set the reloadable flag for this Loader.
     * @param reloadable The new reloadable flag
    public void setReloadable(boolean reloadable);

    // --------------------------------------------------------- Public Methods

     * Add a property change listener to this component.
     * @param listener The listener to add
    public void addPropertyChangeListener(PropertyChangeListener listener);

     * Add a new repository to the set of repositories for this class loader.
     * @param repository Repository to be added
    public void addRepository(String repository);

     * Return the set of repositories defined for this class loader.
     * If none are defined, a zero-length array is returned.
    public String[] findRepositories();

     * Has the internal repository associated with this Loader been modified,
     * such that the loaded classes should be reloaded?
    public boolean modified();

     * Remove a property change listener from this component.
     * @param listener The listener to remove
    public void removePropertyChangeListener(PropertyChangeListener listener);


Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller


new blog posts


Copyright 1998-2021 Alvin Alexander,
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.