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1
22 package org.jboss.console.twiddle.command;
23
24 import java.io.PrintWriter  ;
25 import java.util.List ;
26 import java.util.ArrayList ;
27 import java.util.Iterator ;
28
29 import javax.management.ObjectName ;
30 import javax.management.MBeanServerConnection ;
31 import javax.management.Attribute ;
32 import javax.management.AttributeList ;
33 import javax.management.MBeanInfo ;
34 import javax.management.MBeanAttributeInfo ;
35
36 import gnu.getopt.Getopt;
37 import gnu.getopt.LongOpt;
38
39 import org.jboss.util.Strings;
40
41
48 public class GetCommand
49 extends MBeanServerCommand
50 {
51 private ObjectName objectName;
52
53 private List attributeNames = new ArrayList (5);
54
55 private boolean prefix = true;
56
57 public GetCommand()
58 {
59 super("get", "Get the values of one or more MBean attributes");
60 }
61
62 public void displayHelp()
63 {
64 PrintWriter out = context.getWriter();
65
66 out.println(desc);
67 out.println();
68 out.println("usage: " + name + " [options] <name> [<attr>+]");
69 out.println(" If no attribute names are given all readable attributes are retrieved");
70 out.println("options:");
71 out.println(" --noprefix Do not display attribute name prefixes");
72 out.println(" -- Stop processing options");
73
74 out.flush();
75 }
76
77 private boolean processArguments(final String [] args)
78 throws CommandException
79 {
80 log.debug("processing arguments: " + Strings.join(args, ","));
81
82 if (args.length == 0)
83 {
84 throw new CommandException("Command requires arguments");
85 }
86
87 String sopts = "-:";
88 LongOpt[] lopts =
89 {
90 new LongOpt("noprefix", LongOpt.NO_ARGUMENT, null, 0x1000),
91 };
92
93 Getopt getopt = new Getopt(null, args, sopts, lopts);
94 getopt.setOpterr(false);
95
96 int code;
97 int argidx = 0;
98
99 while ((code = getopt.getopt()) != -1)
100 {
101 switch (code)
102 {
103 case ':':
104 throw new CommandException
105 ("Option requires an argument: " + args[getopt.getOptind() - 1]);
106
107 case '?':
108 throw new CommandException
109 ("Invalid (or ambiguous) option: " + args[getopt.getOptind() - 1]);
110
111 case 0x1000:
112 prefix = false;
113 break;
114
115 case 1:
117 {
118 String arg = getopt.getOptarg();
119
120 switch (argidx++)
121 {
122 case 0:
123 objectName = createObjectName(arg);
124 log.debug("mbean name: " + objectName);
125 break;
126
127 default:
128 log.debug("adding attribute name: " + arg);
129 attributeNames.add(arg);
130 break;
131 }
132 break;
133 }
134 }
135 }
136
137 return true;
138 }
139
140 public void execute(String [] args) throws Exception
141 {
142 processArguments(args);
143
144 if (objectName == null)
145 throw new CommandException("Missing object name");
146
147 log.debug("attribute names: " + attributeNames);
148
149 MBeanServerConnection server = getMBeanServer();
150 if (attributeNames.size() == 0)
151 {
152 attributeNames.clear();
154 MBeanInfo info = server.getMBeanInfo(objectName);
155 MBeanAttributeInfo [] attrInfos = info.getAttributes();
156 for (int a = 0; a < attrInfos.length; a++)
157 {
158 MBeanAttributeInfo attrInfo = attrInfos[a];
159 if (attrInfo.isReadable())
160 attributeNames.add(attrInfo.getName());
161 }
162 }
163
164 String [] names = new String [attributeNames.size()];
165 attributeNames.toArray(names);
166 log.debug("as string[]: " + Strings.join(names, ","));
167
168 AttributeList attrList = server.getAttributes(objectName, names);
169 log.debug("attribute list: " + attrList);
170
171 if (attrList.size() == 0)
172 {
173 throw new CommandException("No matching attributes");
174 }
175 else if (attrList.size() != names.length)
176 {
177 log.warn("Not all specified attributes were found");
178 }
179
180 PrintWriter out = context.getWriter();
181
182 Iterator iter = attrList.iterator();
183 while (iter.hasNext())
184 {
185 Attribute attr = (Attribute ) iter.next();
186 if (prefix)
187 {
188 out.print(attr.getName());
189 out.print("=");
190 }
191 out.println(attr.getValue());
192 }
193 }
194 }
195 |
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