cvs commit: jakarta-tomcat-connectors/jk/java/org/apache/jk/common Shm14.java

[co...@apache.org]

costin      02/05/08 17:16:24

  Added:       jk/java/org/apache/jk/common Shm14.java
  Log:
  Started some work on the 1.4 based scoreboard.
  
  This will use NIO to support the memory mapped file without requiring JNI.
  
  If you remember, this was one of the reasons for using MsgAjp in each
  shmem slot - the scoreboard will be accessed from java and C, and there's no
  way to know how C structures are layed out.
  
  We still need to 'fix' the head - since it uses a C struct at this moment.
  
  Revision  Changes    Path
  1.1                  jakarta-tomcat-connectors/jk/java/org/apache/jk/common/Shm14.java
  
  Index: Shm14.java
  ===================================================================
  /*
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1999 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   * [Additional notices, if required by prior licensing conditions]
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   */
  
  package org.apache.jk.common;
  
  import java.io.*;
  import java.nio.*;
  import java.nio.channels.*;
  
  import java.net.*;
  import java.util.*;
  
  import org.apache.tomcat.util.buf.*;
  import org.apache.tomcat.util.http.*;
  
  import org.apache.tomcat.util.threads.*;
  
  import org.apache.jk.core.*;
  import org.apache.jk.apr.*;
  
  import org.apache.tomcat.util.IntrospectionUtils;
  
  /** Shm implementation using JDK1.4 nio.
   *
   *
   * @author Costin Manolache
   */
  public class Shm14 extends Shm {
      // Not ready yet.
  
      MappedByteBuffer bb;
  
      public void init() {
          try {
              RandomAccessFile f=new RandomAccessFile( file, "rw" );
              FileChannel fc=f.getChannel();
              
              bb=fc.map( FileChannel.MapMode.READ_WRITE, 0, f.length());
          } catch( IOException ex ) {
              ex.printStackTrace();
          }
      }
  
      public void dumpScoreboard(String file) {
          // We can only sync with our backing store.
          bb.force();
          // XXX we should copy the content to the file
      }
  
      public void resetScoreboard() throws IOException {
          // XXX Need to write the head
      }
  
  
      public  int invoke(Msg msg, MsgContext ep )
          throws IOException
      {
          System.err.println("ChannelShm14.invoke: "  + ep );
  
          // 
          
          return 0;
      }    
  
      public void initCli() {
      }
  
      public static void main( String args[] ) {
          try {
              Shm14 shm=new Shm14();
  
              if( args.length == 0 ||
                  ( "-?".equals(args[0]) ) ) {
                  shm.setHelp( true );
                  return;
              }
  
              IntrospectionUtils.processArgs( shm, args);
              shm.execute();
          } catch( Exception ex ) {
              ex.printStackTrace();
          }
      }
  
  }
  
  
  

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