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Java > Open Source Codes > org > codehaus > aspectwerkz > hook > JDWPStarter


1 /**************************************************************************************
2  * Copyright (c) Jonas BonŽr, Alexandre Vasseur. All rights reserved. *
3  * http://aspectwerkz.codehaus.org *
4  * ---------------------------------------------------------------------------------- *
5  * The software in this package is published under the terms of the LGPL license *
6  * a copy of which has been included with this distribution in the license.txt file. *
7  **************************************************************************************/
8 package org.codehaus.aspectwerkz.hook;
9
10 import java.util.ArrayList JavaDoc;
11 import java.util.Collections JavaDoc;
12 import java.util.Comparator JavaDoc;
13 import java.util.HashMap JavaDoc;
14 import java.util.Iterator JavaDoc;
15 import java.util.List JavaDoc;
16 import java.util.Map JavaDoc;
17 import java.util.StringTokenizer JavaDoc;
18
19 /**
20  * Starts a target process adding JDWP option to have a listening connector and be in suspend mode <p/>Target process is
21  * launched using <i>$JAVA_HOME/bin/java [opt] [main] </i> <br/>and [opt] is patched to use <i>-Xdebug
22  * -Xrunjdwp:transport=..,address=..,server=y,suspend=y </i> <br/>
23  *
24  * @author <a HREF="mailto:alex@gnilux.com">Alexandre Vasseur </a>
25  */
26 public class JDWPStarter extends AbstractStarter {
27     private String JavaDoc transport;
28
29     private String JavaDoc address;
30
31     public JDWPStarter(String JavaDoc opt, String JavaDoc main, String JavaDoc transport, String JavaDoc address) {
32         super(opt, main);
33         Map JavaDoc jdwpOpt = parseJdwp();
34         if (jdwpOpt.containsKey("transport")) {
35             this.transport = (String JavaDoc) jdwpOpt.get("transport");
36         } else {
37             this.transport = transport;
38             jdwpOpt.put("transport", this.transport);
39         }
40         if (jdwpOpt.containsKey("address")) {
41             this.address = (String JavaDoc) jdwpOpt.get("address");
42         } else {
43             this.address = address;
44             jdwpOpt.put("address", this.address);
45         }
46         patchOptions(jdwpOpt);
47     }
48
49     public String JavaDoc getTransport() {
50         return transport;
51     }
52
53     public String JavaDoc getAddress() {
54         return address;
55     }
56
57     /**
58      * Patch JDWP options if any to include necessary information Preserve JDWP options excepted server and suspend.
59      * <br/>If transport and address are already specified it uses them.
60      */
61     private void patchOptions(Map JavaDoc jdwpOpt) {
62         if (opt.indexOf("-Xdebug") < 0) {
63             opt = "-Xdebug " + opt;
64         }
65         jdwpOpt.put("server", "y");
66         jdwpOpt.put("suspend", "y");
67         StringBuffer JavaDoc jdwp = new StringBuffer JavaDoc("-Xrunjdwp:");
68         List JavaDoc keys = new ArrayList JavaDoc(jdwpOpt.keySet());
69
70         // JDWP options should start with transport=..,address=..
71 // or it fails strangely
72 //Collections.reverse(keys);
73 keys = jdwpOptionSort(keys);
74         for (Iterator JavaDoc i = keys.iterator(); i.hasNext();) {
75             String JavaDoc key = (String JavaDoc) i.next();
76             jdwp.append(key).append("=").append((String JavaDoc) jdwpOpt.get(key));
77             if (i.hasNext()) {
78                 jdwp.append(",");
79             }
80         }
81         if (opt.indexOf("-Xrunjdwp:") < 0) {
82             opt = jdwp + " " + opt;
83         } else {
84             int from = opt.indexOf("-Xrunjdwp:");
85             int to = Math.min(opt.length(), opt.indexOf(' ', from));
86             StringBuffer JavaDoc newOpt = new StringBuffer JavaDoc("");
87             if (from > 0) {
88                 newOpt.append(opt.substring(0, from));
89             }
90             newOpt.append(" ").append(jdwp);
91             if (to < opt.length()) {
92                 newOpt.append(" ").append(opt.substring(to, opt.length()));
93             }
94             opt = newOpt.toString();
95         }
96     }
97
98     /**
99      * return a Map(String=>String) of JDWP options
100      */
101     private Map JavaDoc parseJdwp() {
102         if (opt.indexOf("-Xrunjdwp:") < 0) {
103             return new HashMap JavaDoc();
104         }
105         String JavaDoc jdwp = opt.substring(
106                 opt.indexOf("-Xrunjdwp:") + "-Xrunjdwp:".length(), Math.min(
107                         opt.length(), opt
108                                       .indexOf(' ', opt.indexOf("-Xrunjdwp:"))
109                 )
110         );
111         HashMap JavaDoc jdwpOpt = new HashMap JavaDoc();
112         StringTokenizer JavaDoc stz = new StringTokenizer JavaDoc(jdwp, ",");
113         while (stz.hasMoreTokens()) {
114             String JavaDoc jdwpo = stz.nextToken();
115             if (jdwpo.indexOf('=') < 0) {
116                 System.err.println("WARN - unrecognized JDWP option: " + jdwpo);
117                 continue;
118             }
119             jdwpOpt.put(jdwpo.substring(0, jdwpo.indexOf('=')), jdwpo.substring(jdwpo.indexOf('=') + 1));
120         }
121         return jdwpOpt;
122     }
123
124     /**
125      * Sort list of String for "transport" to be in first position
126      */
127     private List JavaDoc jdwpOptionSort(List JavaDoc opt) {
128         Comparator JavaDoc c = new Comparator JavaDoc() {
129             public int compare(Object JavaDoc o1, Object JavaDoc o2) {
130                 if (o1 instanceof String JavaDoc && o2 instanceof String JavaDoc) {
131                     if ("transport".equals((String JavaDoc) o1)) {
132                         return -1000;
133                     }
134                     if ("transport".equals((String JavaDoc) o2)) {
135                         return 1000;
136                     }
137                     return 0;
138                 }
139                 return 0;
140             }
141         };
142         Collections.sort(opt, c);
143         return opt;
144     }
145 }
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