org.apache.hadoop.hbase.util

Class ReflectionUtils

java.lang.Object

org.apache.hadoop.hbase.util.ReflectionUtils

@InterfaceAudience.Private
public class ReflectionUtils
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
private static long	previousLogTime
private static ThreadMXBean	threadBean

Constructor Summary

Constructors

Constructor and Description
ReflectionUtils()

Method Summary

Modifier and Type	Method and Description
static <T> Constructor<T>	findConstructor(Class<T> type, Object... paramTypes)
static ClassLoader	getClassLoader()
private static Class<?>[]	getParameterTypes(Object[] params)
private static String	getTaskName(long id, String name)
static <T> T	instantiate(String className, Constructor<T> ctor, Object... ctorArgs)
static <T> T	instantiateWithCustomCtor(String className, Class<?>[] ctorArgTypes, Object[] ctorArgs)
static Object	invokeMethod(Object obj, String methodName, Object... params) Get and invoke the target method from the given object with given parameters
static void	logThreadInfo(org.slf4j.Logger log, String title, long minInterval) Log the current thread stacks at INFO level.
static <T> T	newInstance(Class<T> type, Object... params)
static <T> T	newInstance(String className, Object... params)
(package private) static void	printThreadInfo(PrintStream stream, String title) Print all of the thread's information and stack traces.

Methods inherited from class java.lang.Object

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

Field Detail

previousLogTime

private static long previousLogTime

threadBean

private static final ThreadMXBean threadBean

Constructor Detail

ReflectionUtils

public ReflectionUtils()

Method Detail

instantiateWithCustomCtor

public static <T> T instantiateWithCustomCtor(String className,
                                              Class<?>[] ctorArgTypes,
                                              Object[] ctorArgs)

instantiate

public static <T> T instantiate(String className,
                                Constructor<T> ctor,
                                Object... ctorArgs)

newInstance

public static <T> T newInstance(String className,
                                Object... params)

getClassLoader

public static ClassLoader getClassLoader()

newInstance

public static <T> T newInstance(Class<T> type,
                                Object... params)

findConstructor

public static <T> Constructor<T> findConstructor(Class<T> type,
                                                 Object... paramTypes)

logThreadInfo

public static void logThreadInfo(org.slf4j.Logger log,
                                 String title,
                                 long minInterval)

Log the current thread stacks at INFO level.

Parameters:

log - the logger that logs the stack trace

title - a descriptive title for the call stacks

minInterval - the minimum time from the last

printThreadInfo

static void printThreadInfo(PrintStream stream,
                            String title)

Print all of the thread's information and stack traces.

Parameters:

stream - the stream to

title - a string title for the stack trace

getTaskName

private static String getTaskName(long id,
                                  String name)

invokeMethod

@NonNull
public static Object invokeMethod(Object obj,
                                           String methodName,
                                           Object... params)

Get and invoke the target method from the given object with given parameters

Parameters:

obj - the object to get and invoke method from

methodName - the name of the method to invoke

params - the parameters for the method to invoke

Returns:

the return value of the method invocation

getParameterTypes

private static Class<?>[] getParameterTypes(Object[] params)