src/java/org/apache/turbine/services/pull/ApplicationTool.java

package org.apache.turbine.services.pull;

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/**
 * Tools that go into the Toolbox should implement this interface.
 *
 * @author <a href="mailto:jvanzyl@periapt.com">Jason van Zyl</a>
 * @version $Id$
 */
public interface ApplicationTool
{
    /**
     * Initialize the application tool. The data parameter holds a different
     * type depending on how the tool is being instantiated:
     * <ul>
     * <li>For global tools data will be null</li>
     * <li>For request tools data will be of type RunData</li>
     * <li>For session and authorized tools data will be of type User</li>
     * </ul>
     * <p>
     * It is possible that session scope tools will be initialized with a null
     * <code>User</code> object.  This happens when the first request on a
     * session happens to the be login action.
     * <p>
     * If your session tool depends on having a <code>User</code> object, you
     * should look at implementing the {@link RunDataApplicationTool} interface
     * instead.
     *
     * @param data initialization data
     */
    void init(Object data);

    /**
     * Refresh the application tool. This is
     * necessary for development work where you
     * probably want the tool to refresh itself
     * if it is using configuration information
     * that is typically cached after initialization
     */
    void refresh();
}