Coverage report

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org.apache.commons.jelly.tags.core.ThreadTag$1
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 1  
 /*
 2  
  * Copyright 2002,2004 The Apache Software Foundation.
 3  
  *
 4  
  * Licensed under the Apache License, Version 2.0 (the "License");
 5  
  * you may not use this file except in compliance with the License.
 6  
  * You may obtain a copy of the License at
 7  
  *
 8  
  *      http://www.apache.org/licenses/LICENSE-2.0
 9  
  *
 10  
  * Unless required by applicable law or agreed to in writing, software
 11  
  * distributed under the License is distributed on an "AS IS" BASIS,
 12  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13  
  * See the License for the specific language governing permissions and
 14  
  * limitations under the License.
 15  
  */
 16  
 package org.apache.commons.jelly.tags.core;
 17  
 
 18  
 import java.io.FileOutputStream;
 19  
 import java.io.IOException;
 20  
 import java.io.UnsupportedEncodingException;
 21  
 
 22  
 import org.apache.commons.jelly.JellyContext;
 23  
 import org.apache.commons.jelly.JellyTagException;
 24  
 import org.apache.commons.jelly.TagSupport;
 25  
 import org.apache.commons.jelly.XMLOutput;
 26  
 import org.apache.commons.logging.Log;
 27  
 import org.apache.commons.logging.LogFactory;
 28  
 
 29  
 /** A tag that spawns the contained script in a separate thread
 30  
   *
 31  
   * @author <a href="mailto:vinayc@apache.org">Vinay Chandran</a>
 32  
   */
 33  
 public class ThreadTag extends TagSupport  {
 34  
     /** Thread Name */
 35  
     private String name = null;
 36  
     /** the destination of output */
 37  
     private XMLOutput xmlOutput;
 38  
     /** Should we close the underlying output */
 39  
     private boolean closeOutput;
 40  
     /** The Log to which logging calls will be made. */
 41  
     private static final Log log = LogFactory.getLog(ThreadTag.class);
 42  
 
 43  
     public ThreadTag() {
 44  
     }
 45  
 
 46  
     // Tag interface
 47  
     //-------------------------------------------------------------------------
 48  
     public void doTag(final XMLOutput output) throws JellyTagException {
 49  
         if ( xmlOutput == null ) {
 50  
             // lets default to system.out
 51  
             try {
 52  
                 xmlOutput = XMLOutput.createXMLOutput( System.out );
 53  
             } catch (UnsupportedEncodingException e) {
 54  
                 throw new JellyTagException(e);
 55  
             }
 56  
         }
 57  
 
 58  
         // lets create a child context
 59  
         final JellyContext newContext = context.newJellyContext();
 60  
 
 61  
         Thread thread = new Thread(
 62  
             new Runnable() {
 63  0
                 public void run() {
 64  
                     try {
 65  0
                         getBody().run(newContext, xmlOutput);
 66  0
                         if (closeOutput) {
 67  0
                             xmlOutput.close();
 68  0
                         }
 69  
                         else {
 70  0
                             xmlOutput.flush();
 71  
                         }
 72  
                     }
 73  0
                     catch (Exception e) {
 74  0
                         if (log.isErrorEnabled()) log.error("error running thread tag", e);
 75  0
                     }
 76  0
                 }
 77  
             }
 78  
         );
 79  
         if ( name != null ) {
 80  
             thread.setName( name );
 81  
         }
 82  
         thread.start();
 83  
     }
 84  
 
 85  
     /**
 86  
      * Sets the name of the thread.
 87  
      * @param name The name to set
 88  
      */
 89  
     public void setName(String name) {
 90  
         this.name = name;
 91  
     }
 92  
 
 93  
     /**
 94  
      * Sets the destination of output
 95  
      */
 96  
     public void setXmlOutput(XMLOutput xmlOutput) {
 97  
         this.closeOutput = false;
 98  
         this.xmlOutput = xmlOutput;
 99  
     }
 100  
 
 101  
     /**
 102  
      * Set the file which is generated from the output
 103  
      * @param name The output file name
 104  
      */
 105  
     public void setFile(String name) throws IOException {
 106  
         this.closeOutput = true;
 107  
         setXmlOutput( XMLOutput.createXMLOutput(new FileOutputStream(name)) );
 108  
     }
 109  
 }

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