Package org.jgroups.jmx

Class ReflectUtils

java.lang.Object

org.jgroups.jmx.ReflectUtils

public class ReflectUtils
extends Object

Methods to get/set attributes and invoke operations of a given instance.

Since:

5.2

Constructor Summary

Constructors

Constructor	Description
ReflectUtils()

Method Summary

Modifier and Type	Method	Description
static void	_handleAttrWrite(Object target, String attr_name, String attr_value)
protected static void	convert(Map<String,Map<String,Object>> in, Map<String,String> out)
static Map<String,Map<String,Object>>	dumpSelectedAttributes(Object target, List<String> attrs)	Reads all attributes and values of the given target (annotated with ManagedAttribute and filters them if a non-null list of attributes is given
static void	dumpStats(Object obj, Map<String,Object> map)
static void	handleAttributeAccess(Map<String,String> map, String attrs, Object target)	Handles an attribute read or write
static void	handleAttrWrite(Object target, String attr_name, String attr_value)
static Object	invoke(Method method, Object target, String[] args)
static void	invokeOperation(Map<String,String> map, String operation, Object target)	Invokes an operation and puts the return value into map
static String	listOperations(Class<?> clazz)	Prints all operations of clazz annotated with ManagedOperation
protected static String	methodToString(Method m)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ReflectUtils

public ReflectUtils()

Method Details

handleAttributeAccess

public static void handleAttributeAccess(Map<String,String> map,
 String attrs,
 Object target)

Handles an attribute read or write

dumpSelectedAttributes

public static Map<String,Map<String,Object>> dumpSelectedAttributes(Object target,
 List<String> attrs)

Reads all attributes and values of the given target (annotated with ManagedAttribute and filters them if a non-null list of attributes is given

Parameters:

target - The object to read the attributes from

attrs - A list of attributes to match against. Example:

bind

with match

bind_addr

,

bind_port

etc. If

null

, all attributes will be read.

Returns:

A map of attributes and values, keyed by the object's class

dumpStats

public static void dumpStats(Object obj,
 Map<String,Object> map)

listOperations

public static String listOperations(Class<?> clazz)

Prints all operations of clazz annotated with ManagedOperation

invokeOperation

public static void invokeOperation(Map<String,String> map,
 String operation,
 Object target)
                            throws Exception

Invokes an operation and puts the return value into map

Parameters:

map -

operation - Protocol.OperationName[args], e.g. STABLE.foo[arg1 arg2 arg3]

target - The target object on which to invoke the operation

Throws:

Exception

invoke

public static Object invoke(Method method,
 Object target,
 String[] args)
                     throws Exception

Throws:

Exception

convert

protected static void convert(Map<String,Map<String,Object>> in,
 Map<String,String> out)

handleAttrWrite

public static void handleAttrWrite(Object target,
 String attr_name,
 String attr_value)
                            throws Exception

Throws:

Exception

_handleAttrWrite

public static void _handleAttrWrite(Object target,
 String attr_name,
 String attr_value)

methodToString

protected static String methodToString(Method m)