org.eclipse.jetty.server.handler.HotSwapHandler Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.server.handler;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
/**
* A HandlerContainer
that allows a hot swap of a wrapped handler.
*
* @deprecated The Eclipse Jetty and Apache Felix Http Jetty packages are no longer supported.
*/
@Deprecated(since = "2021-05-27")
public class HotSwapHandler extends AbstractHandlerContainer {
private volatile Handler _handler;
/**
*/
public HotSwapHandler() {
}
/**
* @return Returns the handlers.
*/
public Handler getHandler() {
return _handler;
}
/**
* @return Returns the handlers.
*/
@Override
public Handler[] getHandlers() {
Handler handler = _handler;
if (handler == null)
return new Handler[0];
return new Handler[] { handler };
}
/**
* @param handler Set the {@link Handler} which should be wrapped.
*/
public void setHandler(Handler handler) {
try {
Server server = getServer();
if (handler != null)
handler.setServer(server);
updateBean(_handler, handler, true);
_handler = handler;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/*
* @see org.eclipse.thread.AbstractLifeCycle#doStart()
*/
@Override
protected void doStart() throws Exception {
super.doStart();
}
/*
* @see org.eclipse.thread.AbstractLifeCycle#doStop()
*/
@Override
protected void doStop() throws Exception {
super.doStop();
}
/*
* @see org.eclipse.jetty.server.server.EventHandler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
@Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
Handler handler = _handler;
if (handler != null && isStarted() && handler.isStarted()) {
handler.handle(target, baseRequest, request, response);
}
}
@Override
protected void expandChildren(List list, Class byClass) {
Handler handler = _handler;
if (handler != null)
expandHandler(handler, list, byClass);
}
@Override
public void destroy() {
if (!isStopped())
throw new IllegalStateException("!STOPPED");
Handler child = getHandler();
if (child != null) {
setHandler(null);
child.destroy();
}
super.destroy();
}
}