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From: Ryabtsev Vladimir <v.ryabtsev@pflb.ru>
To: JMeter Users List <user@jmeter.apache.org>
Subject: RE: Equivalent of bsh.shared in groovy
Thread-Topic: Equivalent of bsh.shared in groovy
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Date: Tue, 1 Apr 2014 06:43:28 +0000
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> HashMap isnt thread safe so you should prefer to use a ConcurrentHashMap
As I mentioned in first message, I needed analogue of bsh.shared. It's not =
thread safe too. In my case it doesn't matter because storage initialized j=
ust once (in setUp group) and used by other threads only for reading. It al=
so may store other thread safe object, for example AtomicInteger. But you r=
ight, in general ConcurrentHashMap would be better solution.

> Which is a very bad reason to not put something in a package
First of all it's just principle and not ultimate solution. Anyone can put =
it into package as deep as he wants.


-----Original Message-----
From: Deepak Shetty [mailto:shettyd@gmail.com]=20
Sent: Monday, March 31, 2014 8:01 PM
To: JMeter Users List
Subject: Re: Equivalent of bsh.shared in groovy

your alternative is essentially the same thing - However a HashMap isnt thr=
ead safe so you should prefer to use a ConcurrentHashMap (and prefer puttin=
g interfaces in your signature as opposed to classes) -
>We didn't put SharedHashMap into any package, so it's just ready for=20
>use
without any import statements.
Which is a very bad reason to not put something in a package (And there are=
 no good reasons)


On Mon, Mar 31, 2014 at 12:18 AM, Ryabtsev Vladimir <v.ryabtsev@pflb.ru>wro=
te:

> Thank you for your answer. I've thought out much simpler solution:
>
> import java.util.HashMap;
>
> public class SharedHashMap
> {
>         public static HashMap GetInstance()
>         {
>                 return instance;
>         }
>         static HashMap instance =3D new HashMap(); }
>
> This should be compiled, packaged into jar and put in lib directory.
> After that we can simply use in any groovy (or other language) script:
>
> HashMap sharedHashMap =3D SharedHashMap.GetInstance();=20
> sharedHashMap.put('myObject', myObject); //...
> MyObjectType myObject  =3D (MyObjectType)sharedHashMap.get('myObject');
>
> We didn't put SharedHashMap into any package, so it's just ready for=20
> use without any import statements.
> This is full analogue of bsh.shared namespace with all of its=20
> advantages and disadvantages (like necessity of thread synchronization=20
> in case of modifying objects).
>
>
> -----Original Message-----
> From: Deepak Shetty [mailto:shettyd@gmail.com]
> Sent: Friday, March 28, 2014 7:53 PM
> To: JMeter Users List
> Subject: Re: Equivalent of bsh.shared in groovy
>
> you can always use a java object that holds onto its state statically=20
> ...Similar example here
>
> http://theworkaholic.blogspot.com/2013/03/sharing-session-ids-across-t
> hreads.html- doesnt use groovy but its the same concept
>
>
> On Thu, Mar 27, 2014 at 11:04 PM, Ryabtsev Vladimir=20
> <v.ryabtsev@pflb.ru
> >wrote:
>
> > Sorry, of course I meant I want to pass Java Objects between threads.
> > More exactly, I want to initialize some objects in setup Thread=20
> > Group and get access to them from all thread in main thread group.
> > Thus, I can use vars.putObject() because it stores variable only for=20
> > those thread which put it.
> > How can I share some objects between different threads if I'm using=20
> > JSR223/groovy?
> >
> > -----
> > V
> >
> >
> > -----Original Message-----
> > From: Ryabtsev Vladimir [mailto:v.ryabtsev@pflb.ru]
> > Sent: Friday, March 28, 2014 9:04 AM
> > To: user@jmeter.apache.org
> > Subject: Equivalent of bsh.shared in groovy
> >
> > Hi,
> >
> > Is there any equivalent of bsh.shared namespace in JSR223/groovy?
> > Or the only way to save Java objects between calls is to use=20
> > vars.putObject()?
> >
> > Thanks,
> > V
> >
> > --------------------------------------------------------------------
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> > For additional commands, e-mail: user-help@jmeter.apache.org
> >
> >
>
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