2 // ========================================================================
3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
19 package org.eclipse.jetty.server.handler;
21 import java.io.IOException;
22 import java.util.List;
24 import javax.servlet.ServletException;
25 import javax.servlet.http.HttpServletRequest;
26 import javax.servlet.http.HttpServletResponse;
28 import org.eclipse.jetty.server.Handler;
29 import org.eclipse.jetty.server.Request;
30 import org.eclipse.jetty.server.Server;
31 import org.eclipse.jetty.util.ArrayUtil;
32 import org.eclipse.jetty.util.MultiException;
33 import org.eclipse.jetty.util.annotation.ManagedAttribute;
34 import org.eclipse.jetty.util.annotation.ManagedObject;
36 /* ------------------------------------------------------------ */
37 /** A collection of handlers.
39 * The default implementations calls all handlers in list order,
40 * regardless of the response status or exceptions. Derived implementation
41 * may alter the order or the conditions of calling the contained
46 @ManagedObject("Handler of multiple handlers")
47 public class HandlerCollection extends AbstractHandlerContainer
49 private final boolean _mutableWhenRunning;
50 private volatile Handler[] _handlers;
52 /* ------------------------------------------------------------ */
53 public HandlerCollection()
55 _mutableWhenRunning=false;
58 /* ------------------------------------------------------------ */
59 public HandlerCollection(boolean mutableWhenRunning)
61 _mutableWhenRunning=mutableWhenRunning;
64 /* ------------------------------------------------------------ */
66 * @return Returns the handlers.
69 @ManagedAttribute(value="Wrapped handlers", readonly=true)
70 public Handler[] getHandlers()
75 /* ------------------------------------------------------------ */
77 * @param handlers The handlers to set.
79 public void setHandlers(Handler[] handlers)
81 if (!_mutableWhenRunning && isStarted())
82 throw new IllegalStateException(STARTED);
85 for (Handler handler:handlers)
86 if (handler.getServer()!=getServer())
87 handler.setServer(getServer());
88 Handler[] old=_handlers;;
90 updateBeans(old, handlers);
93 /* ------------------------------------------------------------ */
95 * @see Handler#handle(String, Request, HttpServletRequest, HttpServletResponse)
98 public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response)
99 throws IOException, ServletException
101 if (_handlers!=null && isStarted())
103 MultiException mex=null;
105 for (int i=0;i<_handlers.length;i++)
109 _handlers[i].handle(target,baseRequest, request, response);
115 catch(RuntimeException e)
122 mex=new MultiException();
129 throw new ServletException(mex.getThrowable(0));
131 throw new ServletException(mex);
137 /* ------------------------------------------------------------ */
139 public void setServer(Server server)
141 super.setServer(server);
142 Handler[] handlers=getHandlers();
144 for (Handler h : handlers)
148 /* ------------------------------------------------------------ */
150 * This implementation adds the passed handler to the end of the existing collection of handlers.
151 * @see org.eclipse.jetty.server.server.HandlerContainer#addHandler(org.eclipse.jetty.server.server.Handler)
153 public void addHandler(Handler handler)
155 setHandlers(ArrayUtil.addToArray(getHandlers(), handler, Handler.class));
158 /* ------------------------------------------------------------ */
159 public void removeHandler(Handler handler)
161 Handler[] handlers = getHandlers();
163 if (handlers!=null && handlers.length>0 )
164 setHandlers(ArrayUtil.removeFromArray(handlers, handler));
167 /* ------------------------------------------------------------ */
169 protected void expandChildren(List<Handler> list, Class<?> byClass)
171 if (getHandlers()!=null)
172 for (Handler h:getHandlers())
173 expandHandler(h, list, byClass);
176 /* ------------------------------------------------------------ */
178 public void destroy()
181 throw new IllegalStateException("!STOPPED");
182 Handler[] children=getChildHandlers();
184 for (Handler child: children)