protected Result describeMbean(
@Nonnull MBeanServerConnection mbeanServer, @Nonnull ObjectName objectName)
throws IntrospectionException, ReflectionException, InstanceNotFoundException, IOException {
MBeanInfo mbeanInfo = mbeanServer.getMBeanInfo(objectName);
StringWriter sw = new StringWriter();
PrintWriter out = new PrintWriter(sw);
out.println("# MBEAN");
out.println(objectName.toString());
out.println();
out.println("## OPERATIONS");
List<MBeanOperationInfo> operations = Arrays.asList(mbeanInfo.getOperations());
Collections.sort(
operations,
new Comparator<MBeanOperationInfo>() {
@Override
public int compare(MBeanOperationInfo o1, MBeanOperationInfo o2) {
return o1.getName().compareTo(o1.getName());
}
});
for (MBeanOperationInfo opInfo : operations) {
out.print("* " + opInfo.getName() + "(");
MBeanParameterInfo[] signature = opInfo.getSignature();
for (int i = 0; i < signature.length; i++) {
MBeanParameterInfo paramInfo = signature[i];
out.print(paramInfo.getType() + " " + paramInfo.getName());
if (i < signature.length - 1) {
out.print(", ");
}
}
out.print("):" + opInfo.getReturnType() /* + " - " + opInfo.getDescription() */);
out.println();
}
out.println();
out.println("## ATTRIBUTES");
List<MBeanAttributeInfo> attributes = Arrays.asList(mbeanInfo.getAttributes());
Collections.sort(
attributes,
new Comparator<MBeanAttributeInfo>() {
@Override
public int compare(MBeanAttributeInfo o1, MBeanAttributeInfo o2) {
return o1.getName().compareTo(o2.getName());
}
});
for (MBeanAttributeInfo attrInfo : attributes) {
out.println(
"* "
+ attrInfo.getName()
+ ": "
+ attrInfo.getType()
+ " - "
+ (attrInfo.isReadable() ? "r" : "")
+ (attrInfo.isWritable() ? "w" : "") /* + " - " +
attrInfo.getDescription() */);
}
String description = sw.getBuffer().toString();
return new Result(objectName, description, description);
}
/**
* Description of the specified attribute name.
*
* @param attr - the attribute
* @return String the description
*/
protected String describeAttribute(MBeanAttributeInfo attr) {
StringBuilder buf = new StringBuilder();
buf.append("(");
if (attr.isReadable()) {
buf.append("r");
}
if (attr.isWritable()) {
buf.append("w");
}
buf.append(") ").append(attr.getType()).append(" ").append(attr.getName());
return buf.toString();
}
/**
* @param mbeanServer
* @param objectName
* @param attributeName
* @param attributeValue if <code>null</code>, this is a read access.
* @return if this is a read access, the returned value (may be null); if it is a write access,
* return <code>void.class</code>.
* @throws IOException
* @throws JMException
*/
public Result invokeAttribute(
@Nonnull MBeanServerConnection mbeanServer,
@Nonnull ObjectName objectName,
@Nonnull String attributeName,
@Nullable String attributeValue)
throws IOException, JMException {
MBeanInfo mbeanInfo = mbeanServer.getMBeanInfo(objectName);
MBeanAttributeInfo attributeInfo = null;
for (MBeanAttributeInfo mai : mbeanInfo.getAttributes()) {
if (mai.getName().equals(attributeName)) {
attributeInfo = mai;
break;
}
}
if (attributeInfo == null) {
throw new IllegalArgumentException(
"No attribute '"
+ attributeName
+ "' found on '"
+ objectName
+ "'. Existing attributes: "
+ Arrays.asList(mbeanInfo.getAttributes()));
}
String description;
Object resultValue;
if (attributeValue == null) {
if (attributeInfo.isReadable()) {
Object attribute = mbeanServer.getAttribute(objectName, attributeName);
logger.info("get attribute value {}:{}:{}", objectName, attributeName, attribute);
resultValue = attribute;
description =
"Get attribute value " + objectName + ":" + attributeName + ": " + resultValue;
} else {
throw new IllegalArgumentException(
"Attribute '"
+ attributeName
+ "' is not readable on '"
+ objectName
+ "': "
+ attributeInfo);
}
} else {
if (attributeInfo.isWritable()) {
Object value = convertValue(attributeValue, attributeInfo.getType());
mbeanServer.setAttribute(objectName, new Attribute(attributeName, value));
logger.info("set attribute value {}:{}:{}", objectName, attributeName, value);
description = "Set attribute value " + objectName + ":" + attributeName + ": " + value;
resultValue = void.class;
} else {
throw new IllegalArgumentException(
"Attribute '"
+ attributeName
+ "' is not writable on '"
+ objectName
+ "': "
+ attributeInfo);
}
}
return new Result(objectName, resultValue, description);
}
