Arve,
Here is the same example as shown in the Event Service User's Guide except
that all STAF commands are being submitted via the command line using the
STAF executable instead of being submitted via a Java program. The
following three machines will be used in this example:
- lucas.austin.ibm.com: Is the Event service machine (e.g. the machine
where the Event service is registered in its STAF.cfg file)
- staf6e.austin.ibm.com: Is a machine that registers to be notified when
an event with type "build" is generated by the Event service machine
- staf1e.austin.ibm.com: Is a machine that submits a request to the Event
service machine to generate an event with type "build"
1) Machine staf6e's MyTestHandle registers with the Event service machine
(lucas) to be notified for events with type "build":
So, first on staf6e, since this example is from the command line, I'll
create a static STAF handle to use for this test and set environment
variable STAF_STATIC_HANDLE to this handle so that the STAF requests that I
submit from this terminal will be submitted using this STAF handle (instead
of the STAF executable creating a new STAF handle each time it is called).
staf6e:~ root# STAF local HANDLE CREATE HANDLE Name MyTestHandle
Response
--------
736
staf6e:~ root# export STAF_STATIC_HANDLE=736
Then handle MyTestHandle on machine staf6e registers with the Event service
machine (lucas) to be notified for events with type "build". It will be
notified by handle name (which is the default), not by handle number.
staf6e:~ root# STAF lucas EVENT REGISTER TYPE build
Response
--------
To show the registration(s) for event type "build" on the Event service
machine (lucas), you can list the registrations as follows:
staf6e:~ root# STAF lucas EVENT LIST REGISTRATIONS TYPE build
Response
--------
Type Subtype Machine Notify By Notifiee
----- ------- -------------------------------- --------- ------------
build <None> ssl://staf6e.austin.ibm....@6550 Name MyTestHandle
2) Machine staf6e's MyTestHandle waits for a message with type
"STAF/Service/Event" to be sent to its queue:
The handle we created named MyTestHandleMachine on machine staf6e submits a
local request to wait indefinitely for a message with type
"STAF/Service/Event" to be sent to its queue. Note that every STAF handle
has a queue associated with it.
staf6e:~ root# STAF local QUEUE GET WAIT TYPE STAF/Service/Event
This request will not complete until it receives a message with TYPE
"STAF/Service/Event" on its queue (since I didn't specify a maximum wait
time for the WAIT option).
Note that you could submit this request after the event is generated
instead of before the event is generated. It doesn't matter.
3) Machine staf1e generates an event with type build and subtype win32 on
the Event service machine lucas:
Note that the event service machine (lucas) must give machine
staf1e.austin.ibm.com trust level 4 or greater as that's the trust level
that it requires to submit a GENERATE request to the Event service.
[r...@staf1e ~]# STAF lucas EVENT GENERATE TYPE build SUBTYPE win32
Response
--------
2
This triggers the Event service machine (lucas) to send a
"STAF/Service/Event" type message to MyTestHandle's queue on machine
staf6e.
4) The message arrives on MyTestHandle's queue on machine stat6e:
The "STAF local QUEUE GET WAIT TYPE STAF/Service/Event" request previously
submitted on machine staf6e completes when the message arrives on its
queue:
staf6e:~ root# STAF local QUEUE GET WAIT TYPE STAF/Service/Event
Response
--------
{
handle : 6
handleName : STAF/SERVICE/Event
machine : ssl://lucas.austin.ibm....@6550
message : {
eventID : 2
eventServiceName: Event
handle : 509
handleName : STAF/Client
machine : ssl://staf1e.austin.ibm....@6550
propertyMap : {}
subtype : win32
timestamp : 20101014-13:35:55
type : build
}
priority : 5
staf-map-class-name: STAF/Service/Queue/Entry
timestamp : 20101014-13:26:23
type : STAF/Service/Event
user : none://anonymous
}
--------------------------------------------------------------
Sharon Lucas
IBM Austin, luc...@us.ibm.com
(512) 286-7313 or Tieline 363-7313
From: Arve Knudsen <arve.knud...@gmail.com>
To: Sharon Lucas/Austin/i...@ibmus
Cc: staf-users@lists.sourceforge.net
Date: 10/14/2010 12:55 PM
Subject: Re: [staf-users] How do I receive an event from another
machine?
Hi Sharon
I've now looked at the example, although it really showcases event
propagation between two processes on the same machine rather than on two
different machines. It looks quite similar to what I've been trying to do
on the commandline however. Could you please provide a condensed
commandline example that I can try out for myself, and see that it actually
works?
Thanks!
Arve
On Thu, Oct 14, 2010 at 6:12 PM, Sharon Lucas <luc...@us.ibm.com> wrote:
The Event Service User's Guide at
http://staf.sourceforge.net/current/event.pdf provides a working example
in
section "Example 1: Using the Event Service Via Two Java Applications"
that
includes registering for events, generating events, and and receving
event
messages on a STAFHandle's queue. Does that provide what you're looking
for?
--------------------------------------------------------------
Sharon Lucas
IBM Austin, luc...@us.ibm.com
(512) 286-7313 or Tieline 363-7313
From: Arve Knudsen <arve.knud...@gmail.com>
To: staf-users@lists.sourceforge.net
Date: 10/14/2010 10:58 AM
Subject: [staf-users] How do I receive an event from another
machine?
Hello
Can someone please provide me with a working example of how machine A can
register for an event at machine B, and receive it etc.? I've tried and
tried and can't seem to figure out how to make it work.
Thanks!
Arve
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