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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  
17  package org.apache.commons.jelly.tags.threads;
18  
19  import org.apache.commons.jelly.JellyTagException;
20  import org.apache.commons.jelly.TagSupport;
21  import org.apache.commons.jelly.XMLOutput;
22  
23  /***
24   * Creates a mutex object and stores it in a variable
25   *
26   * @author <a href="mailto:jason@jhorman.org">Jason Horman</a>
27   */
28  
29  public class MutexTag extends TagSupport {
30      /*** The variable name of the mutex */
31      private String var = null;
32  
33      /*** Create and set the mutex */
34      public void doTag(XMLOutput output) throws JellyTagException {
35          if (var == null) {
36              throw new JellyTagException("mutexes require a var attribute");
37          }
38  
39          context.setVariable(var, this);
40      }
41  
42      /***
43       * Sets the variable name to export
44       * @param var The variable name
45       */
46      public void setVar(String var) {
47          this.var = var;
48      }
49  }