Package org.eclipse.persistence.tools.profiler

Class FetchGroupMonitor

java.lang.Object

org.eclipse.persistence.tools.profiler.FetchGroupMonitor

public class FetchGroupMonitor
extends Object

Purpose: Provide a very simple low overhead means for measuring fetch group field usage. This can be useful for performance analysis in a complex system. This monitor is enabled through the System property "org.eclipse.persistence.fetchgroupmonitor=true". It dumps the attribute used for a class every time a new attribute is accessed.

Author:

James Sutherland

Field Summary

Fields

Modifier and Type	Field	Description
static Hashtable<Class<?>,Set<String>>	fetchedAttributes
static Boolean	shouldMonitor

Constructor Summary

Constructors

Constructor	Description
FetchGroupMonitor()

Method Summary

Modifier and Type	Method	Description
static void	recordFetchedAttribute(Class<?> domainClass, String attributeName)
static boolean	shouldMonitor()

Methods inherited from class java.lang.Object

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

Field Details

fetchedAttributes

public static Hashtable<Class<?>,Set<String>> fetchedAttributes

shouldMonitor

public static Boolean shouldMonitor

Constructor Details

FetchGroupMonitor

public FetchGroupMonitor()

Method Details

shouldMonitor

public static boolean shouldMonitor()

recordFetchedAttribute

public static void recordFetchedAttribute(Class<?> domainClass,
 String attributeName)