Ah ok.
So my service class needs to be designed as though acceptRequest can be called
on multiple threads?
I'll come back to you about second point!
________________________________
From: Sharon Lucas <luc...@us.ibm.com>
To: clayton neal <clayton_n...@yahoo.co.uk>
Cc: "staf-users@lists.sourceforge.net" <staf-users@lists.sourceforge.net>
Sent: Monday, 26 September 2011, 18:37
Subject: Re: [staf-users] STAF Design questions
Threads are not passed onto your service.
STAF handles thread management for all service requests (not just
those for your custom service) and is multi-threaded so acceptRequest will
be called on multiple threads.
Since STAF is an open-source project,
you can download / view all of its source code for more information.
To help debug your issue, please provide the output of running "jar
tf yourService.jar" and the line in your STAF.cfg file where you are
registering the service (or the SERVICE ADD request) and the exact error
you are getting from STAFProc output and from the JVM log file for your
service.
--------------------------------------------------------------
Sharon Lucas
IBM Austin, luc...@us.ibm.com
(512) 286-7313 or Tieline 363-7313
From:
clayton neal <clayton_n...@yahoo.co.uk>
To:
Sharon Lucas/Austin/IBM@IBMUS,
Cc:
"staf-users@lists.sourceforge.net"
<staf-users@lists.sourceforge.net>
Date:
09/26/2011 12:25 PM
Subject:
Re: [staf-users]
STAF Design questions
________________________________
Hiya,
Thanks for the reply.
For point 1 STAF has many threads to handle
requests (good), but how are these passed onto my service?
I mean if i develop a new service, and then fire 1000 requests to it per
minute, will STAF queue them
and call acceptRequest in my service on a single thread one at a time,
or will acceptRequest be called on multiple threads?
As I'm also new to Java I seem to be getting an error loading my service
I get a class not found exception when adding the service
The .jar file for the service contains two .class files in correct place
STAF-INF/classes directory
But when the service class entry point creates an instance of the second
class i get this error
Thanks,
Clayton
________________________________
From: Sharon Lucas <luc...@us.ibm.com>
To: clayton neal <clayton_n...@yahoo.co.uk>
Cc: "staf-users@lists.sourceforge.net" <staf-users@lists.sourceforge.net>
Sent: Monday, 26 September 2011, 17:46
Subject: Re: [staf-users] STAF Design questions
Hi Clayton,
Welcome to the STAF project. Here are answers to your questions:
1. If I were to write a new STAF service, how are requests to that service
managed? I guess there are placed on the handle queue, but does STAF
create many threads to handle them? Is there any control of threading to
handle large number of requests?
The service requests are not placed on a handle's queue. STAF provides
threading support to handle STAF service requests via its thread manager
which manages the thread pool. You can configure the number of threads
initially created to handle service requests via the INITIALTHREADS operational
parameter in the STAF.cfg file and you can specify the number of additional
threads which should be created when all existing threads are busy via
the THREADGROWTHDELTA operational parameter. See section "4.7
Operational parameters" in the STAF User's Guide at
http://staf.sourceforge.net/current/STAFUG.htm#HDROPPARMSfor more information
on these operational parameters.
2. What's the difference between a message and a request? A request
will call code in my service, but a message doesn't? Its just placed on
a queue?
A STAF service request is a request that is submitted to a STAF service
(e.g. a START request submitted to the PROCESS service, or a QUEUE request
submitted to the QUEUE service, etc). The QUEUE service is one of
the many STAF internal services. The QUEUE service lets you send
a message string via its QUEUE request to a STAF handle's queue.
3. Is there any control of handle queue sizes, request time-outs etc?
Yes. Section "4.7 Operational parameters"in the STAF User's Guide contains
more information about the STAF operational
parameters such as MAXQUEUESIZE, CONNECTRETRYDELAY, and CONNECTATTEMPTS
that can be set in the STAF.cfg file. For example, MAXQUEUESIZE specifies
the maximum size of the queue associated with each handle.
The MISC (Miscellaneous) service provides a LIST SETTINGS request that
lists the current operational settings for STAF and provides a SET request
that allows you to dynamically change some of the operational settings
including MAXQUEUESIZE. The MISC service also provides a LIST INTERFACES
request that allows you to list the interfaces (aka connection providers)
that are enabled and their configuration settings.
See section "4.3.2 STAFTCP Connection Provider" in the STAF User's
Guide contains more information about configuration options for the STAF
TCP interface such as CONNECTTIMEOUT.
The TCP connection provider's
ReadWriteTimeout is based on the CONNECTTIMEOUT value.
Each STAF service may have some settings used to configure the service.
These are talked about in section "8.0 Service reference"
in the STAF User's Guide for each individual service. Each service
may have parameters that can be specified when registering the service
(and possibly changed dynamically if the service provides a SET request
to do so) For example, the LOG service has a MAXRECORDSIZE parameter
that can be used to override the default maximum length of a logged message
in a log file.
--------------------------------------------------------------
Sharon Lucas
IBM Austin, luc...@us.ibm.com
(512) 286-7313 or Tieline 363-7313
From: clayton
neal <clayton_n...@yahoo.co.uk>
To: "staf-users@lists.sourceforge.net"
<staf-users@lists.sourceforge.net>,
Date: 09/24/2011
02:49 AM
Subject: [staf-users]
STAF Design questions
________________________________
Dear STAF,
I am looking to implement a software testing framework for my company,
and came accross STAF
It may save me some time to implement - and is im a .net person, a chance
to learn some Java
Before I settle on STAF as my wepon of choice in the automation war's,
I'd like to ask a few questions first.
The framework I need to implement has to handle quite large load, so my
questions would be:
1. If I were to write a new STAF service, how are requests to that service
managed?
I guess there are placed on the handle
queue, but does STAF create many threads to handle them?
Is there any control of threading to
handle large number of requests?
2. Whats the difference between a message and a request?
A request will call code in my service,
but a message doesnt? Its just placed on a queue
3. Is there any control of handle queue sizes, request time-outs etc?
I'm coming from a WCF background here, so if your familiar with that, 1
would relate to ConcurrencyMode
Thanks again,
Clayton
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