Re: [Grinder-development] Initialization of object once per thread

[Philip A. <ph...@ma...>]

Hi Darren,

This really belongs on grinder-use - grinder-development is for the
development of the grinder and has fewer subscribers.

Anyway, its hard to say exactly because I don't know what CreateAppPerf
does. The full stack trace from the output log would help.

The difference between code executed at the top level and that executed
from TestRunner.__init__() or __call__() is that the former is not
executed in a worker thread, so can't itself call instrumented code. I
suspect that's the problem. You could try moving the
"createAppTest.record(createAppPerf.createApp)" line to
TestRunner.__init__(). Calling record multiple times for the same Test
and target is essentially a no-op.

- Phil



On 15/04/15 16:28, Darren Ball wrote:
> This is exactly what I am getting along with the script, any insight
> as to why the object is not available inside of the __call__ method
> would be great.
>
>
> 2015-04-15 15:25:14,768 INFO  i-ccfd793a-1 thread-0: starting, will do
> 1 run
> 2015-04-15 15:25:14,768 INFO  i-ccfd793a-1 : start time is
> 1429111514767 ms since Epoch
> 2015-04-15 15:25:14,851 ERROR i-ccfd793a-1 thread-0 [ run-0 ]: aborted
> run - Java exception calling TestRunner
> net.grinder.scriptengine.jython.JythonScriptExecutionException: Java
> exception calling TestRunner
> createAppPerf.createApp(1,100)
> File "/home/grinder/./i-ccfd793a-file-store/current/createapp.py",
> line 13, in __call__
> java.lang.NullPointerException: null
>
> The script:
>
> from net.grinder.script import Test
> from net.grinder.script.Grinder import grinder
> from com.myapp.api.controllers.perf.app import CreateAppPerf
>
> createAppTest = Test(1, "Create APP 1 Table 100 Fields")
> createAppPerf = CreateAppPerf()
> createAppPerf.initialize()
> createAppTest.record(createAppPerf.createApp)
>
>
> class TestRunner:
>     def __call__(self):
>         createAppPerf.createApp(1,100)
>
>
> On Wed, Apr 15, 2015 at 11:05 AM, Darren Ball <bal...@gm...
> <mailto:bal...@gm...>> wrote:
>
>     Hi All,
>
>     I recently found the following example online:
>
>         If you want one instance for all worker threads in a process,
>         call it
>         from the top level of your script.
>
>
>         from mypackage import MyTest
>
>         myTest = MyTest()
>         myTest.init()
>
>         class TestRunner:
>         def __call__(self):
>         # use myTest
>
>     I have this exact code with onle the MyTest object being the
>     differentiator, and in the call I get a null pointer exception.
>
>
>     from net.grinder.script import Test
>     from net.grinder.script.Grinder import grinder
>     from com.myapp.api.controllers.perf.app import CreateAppPerf
>
>     createAppPerf = CreateAppPerf()
>     createAppPerf.initialize()
>
>     createAppTest = Test(1, "Create APP 1 Table 100 Fields")
>     createAppTest.record(createAppPerf.createApp)
>
>     class TestRunner:
>         def __call__(self):
>             createAppPerf.createApp(1,100)
>
>
>
>     Moving the createAppPerf.initialize() to the __init__ method
>     works, but this is not what I would like.  I would to initialize
>     only once.
>
>     Any suggestions as how to do this so that createAppPerf is not
>     null in __call__?
>
>
>     Thanks,
>     Darren
>