I have yet asked the question, and I made a try.
JDK 1.6 brings Sun Api to dynamically load java Agent
http://java.sun.com/javase/6/docs/technotes/guides/attach/index.html
I test it with aspectjweaver.jar ( in fact a custom myaspectjweaver.jar that
contains aspectjweaver.jar ) but I can't success a run.
Does-it possible to attach LTW agent, when an application is already
running?
Or the LTW agent *must* be loaded at starting?
I see that there is some thing similar with the Equinox/Aspects; project in
status incubator.
I load the Agent but the initialisation failed as shown with this traces:
E:\opt\perfStats\scripts>"C:\Program Files\Java\jdk1.6.0_11\bin\java"
-classpath ..\lib\myaspectjweaver.jar;"C:\Program
Files\Java\jdk1.6.0_11\lib\tools.jar";
;. attachapi.launcher.PerfStatsLaunch 4668
E:\opt\perfStats\lib\myaspectjweaver.jar
loading agent : E:\opt\perfStats\lib\myaspectjweaver.jar
Echec Attach
com.sun.tools.attach.AgentInitializationException: Agent JAR loaded but
agent failed to initialize
at
sun.tools.attach.HotSpotVirtualMachine.loadAgent(HotSpotVirtualMachine.java:
103)
at
attachapi.launcher.PerfStatsLaunch.attachPerfStats(PerfStatsLaunch.java:33)
at attachapi.launcher.PerfStatsLaunch.main(PerfStatsLaunch.java:69)
My MANIFEST.MF
Manifest-Version: 1.0
Name: org/aspectj/weaver/
Specification-Title: AspectJ Weaver Classes
Specification-Version: DEVELOPMENT
Specification-Vendor: aspectj.org
Implementation-Title: org.aspectj.weaver
Implementation-Version: DEVELOPMENT
Implementation-Vendor: aspectj.org
Premain-Class: org.aspectj.weaver.loadtime.Agent
Can-Redefine-Classes: true
Agent-Class: org.aspectj.weaver.loadtime.Agent
I added the Agent-Class line.
Cordialement / Best regards
Jean-Louis Pasturel
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