//
   //  ========================================================================
   //  Copyright (c) 1995-2013 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;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.util.Enumeration;
  
  import javax.servlet.AsyncContext;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.eclipse.jetty.http.HttpGenerator;
  import org.eclipse.jetty.http.HttpURI;
  import org.eclipse.jetty.server.handler.HandlerWrapper;
  import org.eclipse.jetty.server.nio.SelectChannelConnector;
  import org.eclipse.jetty.util.Attributes;
  import org.eclipse.jetty.util.AttributesMap;
  import org.eclipse.jetty.util.LazyList;
  import org.eclipse.jetty.util.MultiException;
  import org.eclipse.jetty.util.TypeUtil;
  import org.eclipse.jetty.util.URIUtil;
  import org.eclipse.jetty.util.component.Container;
  import org.eclipse.jetty.util.component.Destroyable;
  import org.eclipse.jetty.util.component.LifeCycle;
  import org.eclipse.jetty.util.log.Log;
  import org.eclipse.jetty.util.log.Logger;
  import org.eclipse.jetty.util.thread.QueuedThreadPool;
  import org.eclipse.jetty.util.thread.ShutdownThread;
  import org.eclipse.jetty.util.thread.ThreadPool;
  
  /* ------------------------------------------------------------ */
  /** Jetty HTTP Servlet Server.
   * This class is the main class for the Jetty HTTP Servlet server.
   * It aggregates Connectors (HTTP request receivers) and request Handlers.
   * The server is itself a handler and a ThreadPool.  Connectors use the ThreadPool methods
   * to run jobs that will eventually call the handle method.
   *
   *  @org.apache.xbean.XBean  description="Creates an embedded Jetty web server"
   */
  public class Server extends HandlerWrapper implements Attributes
  {
      private static final Logger LOG = Log.getLogger(Server.class);
  
      private static final String __version;
      static
      {
          if (Server.class.getPackage()!=null &&
              "Eclipse.org - Jetty".equals(Server.class.getPackage().getImplementationVendor()) &&
               Server.class.getPackage().getImplementationVersion()!=null)
              __version=Server.class.getPackage().getImplementationVersion();
          else
              __version=System.getProperty("jetty.version","8.y.z-SNAPSHOT");
      }
  
      private final Container _container=new Container();
      private final AttributesMap _attributes = new AttributesMap();
      private ThreadPool _threadPool;
      private Connector[] _connectors;
      private SessionIdManager _sessionIdManager;
      private boolean _sendServerVersion = true; //send Server: header
      private boolean _sendDateHeader = false; //send Date: header
      private int _graceful=0;
      private boolean _stopAtShutdown;
      private boolean _dumpAfterStart=false;
      private boolean _dumpBeforeStop=false;
      private boolean _uncheckedPrintWriter=false;
  
  
      /* ------------------------------------------------------------ */
      public Server()
      {
          setServer(this);
      }
  
      /* ------------------------------------------------------------ */
      /** Convenience constructor
       * Creates server and a {@link SelectChannelConnector} at the passed port.
       */
      public Server(int port)
      {
          setServer(this);
 
         Connector connector=new SelectChannelConnector();
         connector.setPort(port);
         setConnectors(new Connector[]{connector});
     }
 
     /* ------------------------------------------------------------ */
     /** Convenience constructor
      * Creates server and a {@link SelectChannelConnector} at the passed address.
      */
     public Server(InetSocketAddress addr)
     {
         setServer(this);
 
         Connector connector=new SelectChannelConnector();
         connector.setHost(addr.getHostName());
         connector.setPort(addr.getPort());
         setConnectors(new Connector[]{connector});
     }
 
 
     /* ------------------------------------------------------------ */
     public static String getVersion()
     {
         return __version;
     }
 
     /* ------------------------------------------------------------ */
     /**
      * @return Returns the container.
      */
     public Container getContainer()
     {
         return _container;
     }
 
     /* ------------------------------------------------------------ */
     public boolean getStopAtShutdown()
     {
         return _stopAtShutdown;
     }
 
     /* ------------------------------------------------------------ */
     public void setStopAtShutdown(boolean stop)
     {
         //if we now want to stop
         if (stop)
         {
             //and we weren't stopping before
             if (!_stopAtShutdown)
             {  
                 //only register to stop if we're already started (otherwise we'll do it in doStart())
                 if (isStarted()) 
                     ShutdownThread.register(this);
             }
         }
         else
             ShutdownThread.deregister(this);
         
         _stopAtShutdown=stop;
     }
 
     /* ------------------------------------------------------------ */
     /**
      * @return Returns the connectors.
      */
     public Connector[] getConnectors()
     {
         return _connectors;
     }
 
     /* ------------------------------------------------------------ */
     public void addConnector(Connector connector)
     {
         setConnectors((Connector[])LazyList.addToArray(getConnectors(), connector, Connector.class));
     }
 
     /* ------------------------------------------------------------ */
     /**
      * Conveniance method which calls {@link #getConnectors()} and {@link #setConnectors(Connector[])} to
      * remove a connector.
      * @param connector The connector to remove.
      */
     public void removeConnector(Connector connector) {
         setConnectors((Connector[])LazyList.removeFromArray (getConnectors(), connector));
     }
 
     /* ------------------------------------------------------------ */
     /** Set the connectors for this server.
      * Each connector has this server set as it's ThreadPool and its Handler.
      * @param connectors The connectors to set.
      */
     public void setConnectors(Connector[] connectors)
     {
         if (connectors!=null)
         {
             for (int i=0;i<connectors.length;i++)
                 connectors[i].setServer(this);
         }
 
         _container.update(this, _connectors, connectors, "connector");
         _connectors = connectors;
     }
 
     /* ------------------------------------------------------------ */
     /**
      * @return Returns the threadPool.
      */
     public ThreadPool getThreadPool()
     {
         return _threadPool;
     }
 
     /* ------------------------------------------------------------ */
     /**
      * @param threadPool The threadPool to set.
      */
     public void setThreadPool(ThreadPool threadPool)
     {
         if (_threadPool!=null)
             removeBean(_threadPool);
         _container.update(this, _threadPool, threadPool, "threadpool",false);
         _threadPool = threadPool;
         if (_threadPool!=null)
             addBean(_threadPool);
     }
 
     /**
      * @return true if {@link #dumpStdErr()} is called after starting
      */
     public boolean isDumpAfterStart()
     {
         return _dumpAfterStart;
     }
 
     /**
      * @param dumpAfterStart true if {@link #dumpStdErr()} is called after starting
      */
     public void setDumpAfterStart(boolean dumpAfterStart)
     {
         _dumpAfterStart = dumpAfterStart;
     }
 
     /**
      * @return true if {@link #dumpStdErr()} is called before stopping
      */
     public boolean isDumpBeforeStop()
     {
         return _dumpBeforeStop;
     }
 
     /**
      * @param dumpBeforeStop true if {@link #dumpStdErr()} is called before stopping
      */
     public void setDumpBeforeStop(boolean dumpBeforeStop)
     {
         _dumpBeforeStop = dumpBeforeStop;
     }
 
 
 
     /* ------------------------------------------------------------ */
     @Override
     protected void doStart() throws Exception
     {
         if (getStopAtShutdown())
         {
             ShutdownThread.register(this);    
         }
         
         ShutdownMonitor.getInstance().start(); // initialize
 
         LOG.info("jetty-"+__version);
         HttpGenerator.setServerVersion(__version);
         
         MultiException mex=new MultiException();
 
         if (_threadPool==null)
             setThreadPool(new QueuedThreadPool());
 
         try
         {
             super.doStart();
         }
         catch(Throwable e)
         {
             mex.add(e);
         }
 
         if (_connectors!=null && mex.size()==0)
         {
             for (int i=0;i<_connectors.length;i++)
             {
                 try{_connectors[i].start();}
                 catch(Throwable e)
                 {
                     mex.add(e);
                 }
             }
         }
 
         if (isDumpAfterStart())
             dumpStdErr();
 
         mex.ifExceptionThrow();
     }
 
     /* ------------------------------------------------------------ */
     @Override
     protected void doStop() throws Exception
     {
         if (isDumpBeforeStop())
             dumpStdErr();
 
         MultiException mex=new MultiException();
 
         if (_graceful>0)
         {
             if (_connectors!=null)
             {
                 for (int i=_connectors.length;i-->0;)
                 {
                     LOG.info("Graceful shutdown {}",_connectors[i]);
                     try{_connectors[i].close();}catch(Throwable e){mex.add(e);}
                 }
             }
 
             Handler[] contexts = getChildHandlersByClass(Graceful.class);
             for (int c=0;c<contexts.length;c++)
             {
                 Graceful context=(Graceful)contexts[c];
                 LOG.info("Graceful shutdown {}",context);
                 context.setShutdown(true);
             }
             Thread.sleep(_graceful);
         }
 
         if (_connectors!=null)
         {
             for (int i=_connectors.length;i-->0;)
                 try{_connectors[i].stop();}catch(Throwable e){mex.add(e);}
         }
 
         try {super.doStop(); } catch(Throwable e) { mex.add(e);}
 
         mex.ifExceptionThrow();
 
         if (getStopAtShutdown())
             ShutdownThread.deregister(this);
     }
 
     /* ------------------------------------------------------------ */
     /* Handle a request from a connection.
      * Called to handle a request on the connection when either the header has been received,
      * or after the entire request has been received (for short requests of known length), or
      * on the dispatch of an async request.
      */
     public void handle(AbstractHttpConnection connection) throws IOException, ServletException
     {
         final String target=connection.getRequest().getPathInfo();
         final Request request=connection.getRequest();
         final Response response=connection.getResponse();
 
         if (LOG.isDebugEnabled())
         {
             LOG.debug("REQUEST "+target+" on "+connection);
             handle(target, request, request, response);
             LOG.debug("RESPONSE "+target+"  "+connection.getResponse().getStatus()+" handled="+request.isHandled());
         }
         else
             handle(target, request, request, response);
     }
 
     /* ------------------------------------------------------------ */
     /* Handle a request from a connection.
      * Called to handle a request on the connection when either the header has been received,
      * or after the entire request has been received (for short requests of known length), or
      * on the dispatch of an async request.
      */
     public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException
     {
         final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
         final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
 
         final Request baseRequest=connection.getRequest();
         final String path=state.getPath();
 
         if (path!=null)
         {
             // this is a dispatch with a path
             final String contextPath=state.getServletContext().getContextPath();
             HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath,path));
             baseRequest.setUri(uri);
             baseRequest.setRequestURI(null);
             baseRequest.setPathInfo(baseRequest.getRequestURI());
             if (uri.getQuery()!=null)
                 baseRequest.mergeQueryString(uri.getQuery()); //we have to assume dispatch path and query are UTF8
         }
 
         final String target=baseRequest.getPathInfo();
         final HttpServletRequest request=(HttpServletRequest)async.getRequest();
         final HttpServletResponse response=(HttpServletResponse)async.getResponse();
 
         if (LOG.isDebugEnabled())
         {
             LOG.debug("REQUEST "+target+" on "+connection);
             handle(target, baseRequest, request, response);
             LOG.debug("RESPONSE "+target+"  "+connection.getResponse().getStatus());
         }
         else
             handle(target, baseRequest, request, response);
 
     }
 
 
     /* ------------------------------------------------------------ */
     public void join() throws InterruptedException
     {
         getThreadPool().join();
     }
 
     /* ------------------------------------------------------------ */
     /* ------------------------------------------------------------ */
     /**
      * @return Returns the sessionIdManager.
      */
     public SessionIdManager getSessionIdManager()
     {
         return _sessionIdManager;
     }
 
     /* ------------------------------------------------------------ */
     /* ------------------------------------------------------------ */
     /**
      * @param sessionIdManager The sessionIdManager to set.
      */
     public void setSessionIdManager(SessionIdManager sessionIdManager)
     {
         if (_sessionIdManager!=null)
             removeBean(_sessionIdManager);
         _container.update(this, _sessionIdManager, sessionIdManager, "sessionIdManager",false);
         _sessionIdManager = sessionIdManager;
         if (_sessionIdManager!=null)
             addBean(_sessionIdManager);
     }
 
     /* ------------------------------------------------------------ */
     public void setSendServerVersion (boolean sendServerVersion)
     {
         _sendServerVersion = sendServerVersion;
     }
 
     /* ------------------------------------------------------------ */
     public boolean getSendServerVersion()
     {
         return _sendServerVersion;
     }
 
     /* ------------------------------------------------------------ */
     /**
      * @param sendDateHeader
      */
     public void setSendDateHeader(boolean sendDateHeader)
     {
         _sendDateHeader = sendDateHeader;
     }
 
     /* ------------------------------------------------------------ */
     public boolean getSendDateHeader()
     {
         return _sendDateHeader;
     }
 
     /* ------------------------------------------------------------ */
     /** 
      */
     @Deprecated
     public int getMaxCookieVersion()
     {
         return 1;
     }
 
     /* ------------------------------------------------------------ */
     /** 
      */
     @Deprecated
     public void setMaxCookieVersion(int maxCookieVersion)
     {
     }
 
     /* ------------------------------------------------------------ */
     /**
      * Add a LifeCycle object to be started/stopped
      * along with the Server.
      * @deprecated Use {@link #addBean(Object)}
      * @param c
      */
     @Deprecated
     public void addLifeCycle (LifeCycle c)
     {
         addBean(c);
     }
 
     /* ------------------------------------------------------------ */
     /**
      * Add an associated bean.
      * The bean will be added to the servers {@link Container}
      * and if it is a {@link LifeCycle} instance, it will be
      * started/stopped along with the Server. Any beans that are also
      * {@link Destroyable}, will be destroyed with the server.
      * @param o the bean object to add
      */
     @Override
     public boolean addBean(Object o)
     {
         if (super.addBean(o))
         {
             _container.addBean(o);
             return true;
         }
         return false;
     }
 
     /**
      * Remove a LifeCycle object to be started/stopped
      * along with the Server
      * @deprecated Use {@link #removeBean(Object)}
      */
     @Deprecated
     public void removeLifeCycle (LifeCycle c)
     {
         removeBean(c);
     }
 
     /* ------------------------------------------------------------ */
     /**
      * Remove an associated bean.
      */
     @Override
     public boolean removeBean (Object o)
     {
         if (super.removeBean(o))
         {
             _container.removeBean(o);
             return true;
         }
         return false;
     }
 
     /* ------------------------------------------------------------ */
     /*
      * @see org.eclipse.util.AttributesMap#clearAttributes()
      */
     public void clearAttributes()
     {
         _attributes.clearAttributes();
     }
 
     /* ------------------------------------------------------------ */
     /*
      * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
      */
     public Object getAttribute(String name)
     {
         return _attributes.getAttribute(name);
     }
 
     /* ------------------------------------------------------------ */
     /*
      * @see org.eclipse.util.AttributesMap#getAttributeNames()
      */
     public Enumeration getAttributeNames()
     {
         return AttributesMap.getAttributeNamesCopy(_attributes);
     }
 
     /* ------------------------------------------------------------ */
     /*
      * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
      */
     public void removeAttribute(String name)
     {
         _attributes.removeAttribute(name);
     }
 
     /* ------------------------------------------------------------ */
     /*
      * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
      */
     public void setAttribute(String name, Object attribute)
     {
         _attributes.setAttribute(name, attribute);
     }
 
     /* ------------------------------------------------------------ */
     /**
      * @return the graceful
      */
     public int getGracefulShutdown()
     {
         return _graceful;
     }
 
     /* ------------------------------------------------------------ */
     /**
      * Set graceful shutdown timeout.  If set, the internal <code>doStop()</code> method will not immediately stop the
      * server. Instead, all {@link Connector}s will be closed so that new connections will not be accepted
      * and all handlers that implement {@link Graceful} will be put into the shutdown mode so that no new requests
      * will be accepted, but existing requests can complete.  The server will then wait the configured timeout
      * before stopping.
      * @param timeoutMS the milliseconds to wait for existing request to complete before stopping the server.
      *
      */
     public void setGracefulShutdown(int timeoutMS)
     {
         _graceful=timeoutMS;
     }
 
     /* ------------------------------------------------------------ */
     @Override
     public String toString()
     {
         return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
     }
 
     /* ------------------------------------------------------------ */
     @Override
     public void dump(Appendable out,String indent) throws IOException
     {
         dumpThis(out);
         dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),TypeUtil.asList(_connectors));
     }
 
 
     /* ------------------------------------------------------------ */
     public boolean isUncheckedPrintWriter()
     {
         return _uncheckedPrintWriter;
     }
 
     /* ------------------------------------------------------------ */
     public void setUncheckedPrintWriter(boolean unchecked)
     {
         _uncheckedPrintWriter=unchecked;
     }
 
 
     /* ------------------------------------------------------------ */
     /* A handler that can be gracefully shutdown.
      * Called by doStop if a {@link #setGracefulShutdown} period is set.
      * TODO move this somewhere better
      */
     public interface Graceful extends Handler
     {
         public void setShutdown(boolean shutdown);
     }
 
     /* ------------------------------------------------------------ */
     public static void main(String...args) throws Exception
     {
         System.err.println(getVersion());
     }
 }