/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.loader;
import com.caucho.util.L10N;
import java.lang.reflect.Method;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Waits for the start and stop events.
*/
public class StartListener implements EnvironmentListener {
private static final L10N L = new L10N(StartListener.class);
private static final Logger log
= Logger.getLogger(StartListener.class.getName());
private Object _resource;
/**
* Creates the new start listener.
*
* @param resource the resource which needs start/stop
*/
public StartListener(Object resource)
{
_resource = resource;
}
/**
* Configuration callback
*/
public void environmentConfigure(EnvironmentClassLoader loader)
{
}
/**
* Bind callback
*/
public void environmentBind(EnvironmentClassLoader loader)
{
}
/**
* Handles the case where a class loader is activated.
*/
public void environmentStart(EnvironmentClassLoader loader)
{
Method start = getStartMethod(_resource.getClass());
if (start == null)
return;
try {
start.invoke(_resource);
} catch (Throwable e) {
log.log(Level.WARNING, e.toString(), e);
}
}
/**
* Handles the case where a class loader is dropped.
*/
public void environmentStop(EnvironmentClassLoader loader)
{
Method stop = getStopMethod(_resource.getClass());
if (stop == null)
return;
try {
stop.invoke(_resource);
} catch (Throwable e) {
log.log(Level.WARNING, e.toString(), e);
}
}
public static Method getStartMethod(Class cl)
{
try {
return cl.getMethod("start", new Class[0]);
} catch (Throwable e) {
}
return null;
}
public static Method getStopMethod(Class cl)
{
try {
return cl.getMethod("stop", new Class[0]);
} catch (Throwable e) {
}
return null;
}
}