topic Re: Assign Value from tStatLogCatcher to a context variable in Talend Studio

Assign Value from tStatLogCatcher to a context variable

Anonymous — Thu, 27 Sep 2018 10:58:08 GMT

Hi,

I am trying to read some data from tStatLogCatcher like pid, system_pid and assign it to a context variable. My variable is context.pid and it is of String type. I have a job as shown in the picture below:

I run the job, but no value is printed. Am I doing something wrong? Is this a right way to assign value to a context variable?

Thank you in advance!

Re: Assign Value from tStatLogCatcher to a context variable

fdenis — Thu, 27 Sep 2018 11:12:24 GMT

context is like function parameter. you may use globalMap.put("pid") globalMap.get("pid")

Re: Assign Value from tStatLogCatcher to a context variable

Anonymous — Thu, 27 Sep 2018 11:41:20 GMT

Could you give me an example of how to retrieve pid by using "globalMap.put("pid")" and where?. I do not know how to do it.

Re: Assign Value from tStatLogCatcher to a context variable

fdenis — Thu, 27 Sep 2018 12:07:17 GMT

if tlog did not give you the information you need…
there is no universal method to get pid…
why did you need it?

Re: Assign Value from tStatLogCatcher to a context variable

Anonymous — Thu, 27 Sep 2018 13:28:17 GMT

What I need to do is to store pid in a variable and then use it in a stored procedure. I need pid because I want to store the processID of the current jobSession. So, i want to store it somewhere.

@fdenis wrote:
if tlog did not give you the information you need…
there is no universal method to get pid…
why did you need it?

Re: Assign Value from tStatLogCatcher to a context variable

fdenis — Thu, 27 Sep 2018 13:58:10 GMT

pid is an os level. if you run a task you can get the pid of the task.
to get pid from the process you have to ask your parent to guive your pid. how to ask pid depend on parent….

Re: Assign Value from tStatLogCatcher to a context variable

fdenis — Thu, 27 Sep 2018 14:39:44 GMT

Thanks to @Rall_2_0

If you add a tJava in a simple job with the following code....
System.out.println(pid);
System.out.println(fatherPid);
System.out.println(rootPid);

so you can retieve Pid using "pid" in a tmap output value.

Re: Assign Value from tStatLogCatcher to a context variable

fdenis — Mon, 01 Oct 2018 08:54:38 GMT

did you success on your task?

Re: Assign Value from tStatLogCatcher to a context variable

Anonymous — Mon, 01 Oct 2018 09:01:29 GMT

Yes, I assing in tJava component this value: context.pid = pid. This way I have been able to store pid in my context variable.

Re: Assign Value from tStatLogCatcher to a context variable

fdenis — Mon, 01 Oct 2018 09:04:08 GMT

great!, so can you tag as solved?
see you next time!