alt.jiapi.agent

Class DefaultAdvice

java.lang.Object

alt.jiapi.util.HotSpotAdvice

alt.jiapi.agent.DefaultAdvice

public class DefaultAdvice
extends HotSpotAdvice

Constructor Summary

Constructors

Constructor and Description
DefaultAdvice()

Method Summary

Modifier and Type	Method and Description
void	advice() Each extending class must provide advice() method.

Methods inherited from class alt.jiapi.util.HotSpotAdvice

doHotSpot, getHotSpotName

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultAdvice

public DefaultAdvice()

Method Detail

advice

public void advice()

Description copied from class: HotSpotAdvice

Each extending class must provide advice() method. Body of this method is copied into instrumented class.

The exact location, where method body gets copied into, depends how developer writes the method body.

A call to doHotSpot() in method body, is a tagging method call indicating that current hotspot should be executed.

For example, of we have a method foo()...

 public void foo() {
    bar.doSomeThing();
 }
 

...and HotSpotAdvisor.advice():

 public void advice() {
    long l1 = System.currentTimeMillis();
    doHotSpot();
    long l2 = System.currentTimeMillis();
    System.out.println("It took " + (l2-l1) + " ms");
 }
 

...then it would result in instrumented foo() method like

 public void foo() {
    long l1 = System.currentTimeMillis();
    bar.doSomething();
    long l2 = System.currentTimeMillis();
    System.out.println("It took " + (l2-l1) + " ms");
 }

 If a developer does not call doHotSpot() method in
 implementation of advice() method, corresponding hotspot
 gets replaced from instrumented class.

Specified by:

advice in class HotSpotAdvice

See Also:

HotSpotAdvice.doHotSpot()