MBeanServerContextValueTag


1   /**
2    *
3    * Copyright 2003-2004 The Apache Software Foundation
4    *
5    *  Licensed under the Apache License, Version 2.0 (the "License");
6    *  you may not use this file except in compliance with the License.
7    *  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   *  Unless required by applicable law or agreed to in writing, software
12   *  distributed under the License is distributed on an "AS IS" BASIS,
13   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   *  See the License for the specific language governing permissions and
15   *  limitations under the License.
16   */
17  
18  package org.apache.geronimo.console.web.taglib;
19  
20  import java.io.IOException  ;
21  import javax.management.MBeanServer  ;
22  import javax.servlet.jsp.JspWriter  ;
23  
24  /**
25   * This tag presents the contents of an attribute from the MBeanServerContext
26   * tag to the screen.  The attribute type is defined with the "type" parameter
27   * in the attribute tag.
28   *
29   */
30  public final class MBeanServerContextValueTag extends MBeanServerContextSupport {
31      private String   type = "";
32      private MBeanServerContextTag ctx;
33      private MBeanServer   server;
34  
35      public int doStartTag() {
36          ctx = getMBeanServerContext();
37          server = ctx.getMBeanServer();
38          JspWriter   out = pageContext.getOut();
39  
40          try {
41              if (server != null) {
42                  String   output = getContextValue(getType());
43                  out.print(output);
44              }
45          } catch (IOException   e) {
46              e.printStackTrace();
47          }
48          return EVAL_BODY_INCLUDE;
49      }
50  
51      public int doEndTag() {
52          return EVAL_PAGE;
53      }
54  
55      public String   getType() {
56          return type;
57      }
58  
59      public void setType(String   type) {
60          this.type = type;
61      }
62  
63      private String   getContextValue(String   type) {
64          if (type.equals("ObjectNameFilter")) {
65              return ctx.getObjectNameFilter();
66          }
67          return "error, attribute [" + type + "] not recognized";
68      }
69  }
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