InvokeCommandpublic class InvokeCommand extends MBeanServerCommand | Invoke an operation on an MBean. |
| Fields Summary |
|---|
| public static final int | QUERY_FIRST | | public static final int | QUERY_ALL | | private int | type | | private String | query | | private String | opName | | private List | opArgs |
| Constructors Summary |
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public InvokeCommand() // probably not more than 5 args
super("invoke", "Invoke an operation on an MBean");
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| Methods Summary |
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| public void | displayHelp()
PrintWriter out = context.getWriter();
out.println(desc);
out.println();
out.println("usage: " + name + " [options] <query> <operation> (<arg>)*");
out.println();
out.println("options:");
out.println(" -q, --query-type[=<type>] Treat object name as a query");
out.println(" -- Stop processing options");
out.println();
out.println("query type:");
out.println(" f[irst] Only invoke on the first matching name [default]");
out.println(" a[ll] Invoke on all matching names");
| | public void | execute(java.lang.String[] args)
processArguments(args);
if (query == null)
throw new CommandException("Missing MBean query");
if (opName == null)
throw new CommandException("Missing operation name");
log.debug("operation arguments: " + opArgs);
// get the list of object names to work with
ObjectName[] names = queryMBeans(query);
if (type == QUERY_FIRST)
{
names = new ObjectName[]{names[0]};
}
for (int i = 0; i < names.length; i++)
{
invoke(names[i]);
}
| | private void | invoke(javax.management.ObjectName name)
log.debug("Invoke " + name);
MBeanServerConnection server = getMBeanServer();
// get mbean info for this mbean
MBeanInfo info = server.getMBeanInfo(name);
// does it even have an operation of this name?
MBeanOperationInfo[] ops = info.getOperations();
MBeanOp inputOp = new MBeanOp(opName, opArgs.size());
MBeanOp matchOp = null;
ArrayList opList = new ArrayList();
for (int i = 0; i < ops.length; i++)
{
MBeanOperationInfo opInfo = ops[i];
MBeanOp op = new MBeanOp(opInfo.getName(), opInfo.getSignature());
if (inputOp.equals(op) == true)
{
matchOp = op;
break;
}
opList.add(op);
}
if (matchOp == null)
{
// If there was not explicit match on type, look for a match on arg count
OpCountComparator comparator = new OpCountComparator();
Collections.sort(opList, comparator);
int match = Collections.binarySearch(opList, inputOp, comparator);
if (match >= 0)
{
// Validate that the match op equates to the input op
matchOp = (MBeanOp) opList.get(match);
match = comparator.compare(matchOp, inputOp);
if (match != 0)
{
throw new CommandException("MBean has no such operation named '" +
opName + "' with signature compatible with: " + opArgs);
}
}
else
{
throw new CommandException("MBean has no such operation named '" +
opName + "' with signature compatible with: " + opArgs);
}
}
// convert parameters with PropertyEditor
int count = matchOp.getArgCount();
Object[] params = new Object[count];
for (int i = 0; i < count; i++)
{
String argType = matchOp.getArgType(i);
PropertyEditor editor = PropertyEditors.getEditor(argType);
editor.setAsText((String) opArgs.get(i));
params[i] = editor.getValue();
}
log.debug("Using params: " + Strings.join(params, ","));
// invoke the operation
Object result = server.invoke(name, opName, params, matchOp.getSignature());
log.debug("Raw result: " + result);
if (!context.isQuiet())
{
// Translate the result to text
String resultText = null;
if (result != null)
{
PropertyEditor editor = PropertyEditors.getEditor(result.getClass());
editor.setValue(result);
resultText = editor.getAsText();
log.debug("Converted result: " + resultText);
}
else
{
resultText = "'null'";
}
// render results to out
PrintWriter out = context.getWriter();
out.println(resultText);
out.flush();
}
| | private void | processArguments(java.lang.String[] args)
log.debug("processing arguments: " + Strings.join(args, ","));
if (args.length == 0)
{
throw new CommandException("Command requires arguments");
}
String sopts = "-:q:";
LongOpt[] lopts =
{
new LongOpt("query-type", LongOpt.OPTIONAL_ARGUMENT, null, 'q"),
};
Getopt getopt = new Getopt(null, args, sopts, lopts);
getopt.setOpterr(false);
int code;
int argidx = 0;
while ((code = getopt.getopt()) != -1)
{
switch (code)
{
case ':":
throw new CommandException
("Option requires an argument: " + args[getopt.getOptind() - 1]);
case '?":
throw new CommandException
("Invalid (or ambiguous) option: " + args[getopt.getOptind() - 1]);
// non-option arguments
case 1:
{
String arg = getopt.getOptarg();
switch (argidx++)
{
case 0:
query = arg;
log.debug("query: " + query);
break;
case 1:
opName = arg;
log.debug("operation name: " + opName);
break;
default:
opArgs.add(arg);
break;
}
break;
}
// Set the query type
case 'q":
{
String arg = getopt.getOptarg();
//
// jason: need a uniqueness mapper, like getopt uses for options...
//
if (arg.equals("f") || arg.equals("first"))
{
type = QUERY_FIRST;
}
else if (arg.equals("a") || arg.equals("all"))
{
type = QUERY_ALL;
}
else
{
throw new CommandException("Invalid query type: " + arg);
}
log.debug("Query type: " + type);
break;
}
}
}
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