| // |
| // ======================================================================== |
| // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // 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.concurrent.CountDownLatch; |
| |
| 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; |
| import org.eclipse.jetty.util.LazyList; |
| import org.eclipse.jetty.util.MultiException; |
| |
| /* ------------------------------------------------------------ */ |
| /** A collection of handlers. |
| * <p> |
| * The default implementations calls all handlers in list order, |
| * regardless of the response status or exceptions. Derived implementation |
| * may alter the order or the conditions of calling the contained |
| * handlers. |
| * <p> |
| * |
| * @org.apache.xbean.XBean |
| */ |
| public class HandlerCollection extends AbstractHandlerContainer |
| { |
| private final boolean _mutableWhenRunning; |
| private volatile Handler[] _handlers; |
| private boolean _parallelStart=false; |
| |
| /* ------------------------------------------------------------ */ |
| public HandlerCollection() |
| { |
| _mutableWhenRunning=false; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public HandlerCollection(boolean mutableWhenRunning) |
| { |
| _mutableWhenRunning=mutableWhenRunning; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @return Returns the handlers. |
| */ |
| public Handler[] getHandlers() |
| { |
| return _handlers; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * |
| * @param handlers The handlers to set. |
| */ |
| public void setHandlers(Handler[] handlers) |
| { |
| if (!_mutableWhenRunning && isStarted()) |
| throw new IllegalStateException(STARTED); |
| |
| Handler [] old_handlers = _handlers==null?null:_handlers.clone(); |
| _handlers = handlers; |
| |
| Server server = getServer(); |
| MultiException mex = new MultiException(); |
| for (int i=0;handlers!=null && i<handlers.length;i++) |
| { |
| if (handlers[i].getServer()!=server) |
| handlers[i].setServer(server); |
| } |
| |
| if (getServer()!=null) |
| getServer().getContainer().update(this, old_handlers, handlers, "handler"); |
| |
| // stop old handlers |
| for (int i=0;old_handlers!=null && i<old_handlers.length;i++) |
| { |
| if (old_handlers[i]!=null) |
| { |
| try |
| { |
| if (old_handlers[i].isStarted()) |
| old_handlers[i].stop(); |
| } |
| catch (Throwable e) |
| { |
| mex.add(e); |
| } |
| } |
| } |
| |
| mex.ifExceptionThrowRuntime(); |
| } |
| |
| |
| |
| /* ------------------------------------------------------------ */ |
| /** Get the parrallelStart. |
| * @return true if the contained handlers are started in parallel. |
| */ |
| public boolean isParallelStart() |
| { |
| return _parallelStart; |
| } |
| |
| |
| |
| /* ------------------------------------------------------------ */ |
| /** Set the parallelStart. |
| * @param parallelStart If true, contained handlers are started in parallel. |
| */ |
| public void setParallelStart(boolean parallelStart) |
| { |
| this._parallelStart = parallelStart; |
| } |
| |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @see Handler#handle(String, Request, HttpServletRequest, HttpServletResponse) |
| */ |
| public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) |
| throws IOException, ServletException |
| { |
| if (_handlers!=null && isStarted()) |
| { |
| MultiException mex=null; |
| |
| for (int i=0;i<_handlers.length;i++) |
| { |
| try |
| { |
| _handlers[i].handle(target,baseRequest, request, response); |
| } |
| catch(IOException e) |
| { |
| throw e; |
| } |
| catch(RuntimeException e) |
| { |
| throw e; |
| } |
| catch(Exception e) |
| { |
| if (mex==null) |
| mex=new MultiException(); |
| mex.add(e); |
| } |
| } |
| if (mex!=null) |
| { |
| if (mex.size()==1) |
| throw new ServletException(mex.getThrowable(0)); |
| else |
| throw new ServletException(mex); |
| } |
| |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /* |
| * @see org.eclipse.jetty.server.server.handler.AbstractHandler#doStart() |
| */ |
| @Override |
| protected void doStart() throws Exception |
| { |
| final MultiException mex=new MultiException(); |
| if (_handlers!=null) |
| { |
| if (_parallelStart) |
| { |
| final CountDownLatch latch = new CountDownLatch(_handlers.length); |
| final ClassLoader loader = Thread.currentThread().getContextClassLoader(); |
| for (int i=0;i<_handlers.length;i++) |
| { |
| final int h=i; |
| getServer().getThreadPool().dispatch( |
| new Runnable() |
| { |
| public void run() |
| { |
| ClassLoader orig = Thread.currentThread().getContextClassLoader(); |
| try |
| { |
| Thread.currentThread().setContextClassLoader(loader); |
| _handlers[h].start(); |
| } |
| catch(Throwable e) |
| { |
| mex.add(e); |
| } |
| finally |
| { |
| Thread.currentThread().setContextClassLoader(orig); |
| latch.countDown(); |
| } |
| } |
| } |
| ); |
| } |
| latch.await(); |
| } |
| else |
| { |
| for (int i=0;i<_handlers.length;i++) |
| { |
| try{_handlers[i].start();} |
| catch(Throwable e){mex.add(e);} |
| } |
| } |
| } |
| super.doStart(); |
| mex.ifExceptionThrow(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /* |
| * @see org.eclipse.jetty.server.server.handler.AbstractHandler#doStop() |
| */ |
| @Override |
| protected void doStop() throws Exception |
| { |
| MultiException mex=new MultiException(); |
| try { super.doStop(); } catch(Throwable e){mex.add(e);} |
| if (_handlers!=null) |
| { |
| for (int i=_handlers.length;i-->0;) |
| try{_handlers[i].stop();}catch(Throwable e){mex.add(e);} |
| } |
| mex.ifExceptionThrow(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public void setServer(Server server) |
| { |
| if (isStarted()) |
| throw new IllegalStateException(STARTED); |
| |
| Server old_server=getServer(); |
| |
| super.setServer(server); |
| |
| Handler[] h=getHandlers(); |
| for (int i=0;h!=null && i<h.length;i++) |
| h[i].setServer(server); |
| |
| if (server!=null && server!=old_server) |
| server.getContainer().update(this, null,_handlers, "handler"); |
| |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /* Add a handler. |
| * This implementation adds the passed handler to the end of the existing collection of handlers. |
| * @see org.eclipse.jetty.server.server.HandlerContainer#addHandler(org.eclipse.jetty.server.server.Handler) |
| */ |
| public void addHandler(Handler handler) |
| { |
| setHandlers((Handler[])LazyList.addToArray(getHandlers(), handler, Handler.class)); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void removeHandler(Handler handler) |
| { |
| Handler[] handlers = getHandlers(); |
| |
| if (handlers!=null && handlers.length>0 ) |
| setHandlers((Handler[])LazyList.removeFromArray(handlers, handler)); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| protected Object expandChildren(Object list, Class byClass) |
| { |
| Handler[] handlers = getHandlers(); |
| for (int i=0;handlers!=null && i<handlers.length;i++) |
| list=expandHandler(handlers[i], list, byClass); |
| return list; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public void destroy() |
| { |
| if (!isStopped()) |
| throw new IllegalStateException("!STOPPED"); |
| Handler[] children=getChildHandlers(); |
| setHandlers(null); |
| for (Handler child: children) |
| child.destroy(); |
| super.destroy(); |
| } |
| } |