Le 28/02/2012 07:05, Hemal Pandya a écrit :
I am trying to develop a development framework where we can introduce
a delay at arbitrary but simple join-points. This is intended for some
testing related to concurrency and such-like.
What I want to be able to do is, on different runs specify a method
before or after execution of which the thread should pause. For any
run, I don't expect the total pauses to be more then 10, if that many.
I can think of two ways to do this and would appreciate very much any
views on their pros and cons.
One approach is to define two abstract aspects, PauseBefore and
PauseAfter. In aop.xml concrete aspects are defined that extend one of
the two. The other approach is to have single Pause aspect that reads
an external file that lists the method names and before/after labels.
The biggest problem with the abstract aspect approach is writing the
aop.xml. The runs will likely be done by others with no experience
with AspectJ or even programming, and I will need to build some kind
of tool that creates the aop.xml file and packages it correctly in a jar.
With a single aspect I guess every method will have to be instrumented
, which will that be too much of an overhead? If that can be
compensated somehow, I can think of many advantages, such as changing
the configuration on the fly without restarting the process,
specifying the wait time.
There must be middle-road that is the best approach, but I am not able
to see it. Any advice?
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yes it is possible to package it, with the package java.util.jar in java SE
At work,I have done a AspectJ packager for LTW weaving for tracing in
logs files or exposing values as MBeans attributes.
The packager gui is java Swing. But what is not evident for beginner, in
abstract aspect, is to write a correct pointcut. In your case it is
certainly simple ( the full name of the method, giving a pattern may
help the users)
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