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From jstrac...@apache.org
Subject cvs commit: jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/core ThreadTag.java CoreTagLibrary.java
Date Wed, 26 Jun 2002 09:14:31 GMT
jstrachan    2002/06/26 02:14:31

  Modified:    jelly/src/java/org/apache/commons/jelly/tags/core
                        CoreTagLibrary.java
  Added:       jelly/src/java/org/apache/commons/jelly/tags/core
                        ThreadTag.java
  Log:
  Added Vinay's <thread> tag which supports evaluating a block of Jelly script asynchronously
in another thread.
  
  Revision  Changes    Path
  1.12      +6 -5      jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/core/CoreTagLibrary.java
  
  Index: CoreTagLibrary.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/core/CoreTagLibrary.java,v
  retrieving revision 1.11
  retrieving revision 1.12
  diff -u -r1.11 -r1.12
  --- CoreTagLibrary.java	13 Jun 2002 08:16:47 -0000	1.11
  +++ CoreTagLibrary.java	26 Jun 2002 09:14:31 -0000	1.12
  @@ -99,6 +99,7 @@
           registerTag("expr", ExprTag.class);
           registerTag("new", NewTag.class);
           registerTag("whitespace", WhitespaceTag.class);
  +        registerTag("thread", ThreadTag.class);
       }
       
   }
  
  
  
  1.1                  jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/core/ThreadTag.java
  
  Index: ThreadTag.java
  ===================================================================
  /*
   * 
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1999-2002 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", "Commons", 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/>.
   */
  package org.apache.commons.jelly.tags.core;
  
  import java.io.FileOutputStream;
  import java.io.FileWriter;
  import java.io.IOException;
  
  import org.apache.commons.jelly.MissingAttributeException;
  import org.apache.commons.jelly.TagSupport;
  import org.apache.commons.jelly.XMLOutput;
  
  /** A tag that spwans the contained script in a separate thread
    *
    * @author <a href="mailto:vinayc@apache.org">Vinay Chandran</a>
    */
  public class ThreadTag extends TagSupport 
  {
      /** Thread Name */
      private String name = null;
      /** the destination of output */
      private XMLOutput xmlOutput;
      
  
      public ThreadTag()
      {
      }
  
      // Tag interface
      //------------------------------------------------------------------------- 
      public void doTag(final XMLOutput output) throws Exception {
          if ( xmlOutput == null ) {
              throw new MissingAttributeException("xmlOutput");
          }
          
          Thread thread = new Thread(
              new Runnable() {
                  public void run() {
                      try {
                          invokeBody(xmlOutput);
                          xmlOutput.close();
                      }
                      catch (Exception e) {
                          e.printStackTrace();
                      }
                  }
              }
          );
          if ( name != null ) {
              thread.setName( name );
          }
          thread.start();
      }
      
      /**
       * Sets the name of the thread.
       * @param name The name to set
       */
      public void setName(String name) {
          this.name = name;
      }
  
      /**
       * Sets the destination of output
       */
      public void setXmlOutput(XMLOutput xmlOutput) {
          this.xmlOutput = xmlOutput;
      }
      
      /**
       * Set the file which is generated from the output
       * @param name The output file name
       */
      public void setFile(String name) throws IOException {
          setXmlOutput( XMLOutput.createXMLOutput(new FileOutputStream(name)) );
      }
  }
  
  
  

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