Some questions

[khourafi]

Hi everybody,
I am new in SpringBatch and I have read some docs about it. I understood a few things about it and I have a few questions.Here are my questions:

1- Is there a possibility of storing data somewhere if an error occurs while processing a step? (here I mean the data loaded from a Database for example not the step context data). If it's possible how can we configure or program that?

2-If we want to launch a batch via our command line manually, is it possible to specify parameters in order to make our batch proceed between date1 and date2 for example?
i
3-What are the parameters that we can give to a step execution ?

4- I tried something and it didn't work
<batch:job id="myjob">
<batch:step id="stepA" next="stepB" />
<batch:step id="stepB" next="stepA" />
</batch:job>

I would like to know why this job doesn't work like this : stepA --> stepB-->stepA--stepB .......

Actually it executes stepA then stepB and ends . I would like to know why?

Thanks for any help.

PS: besides SpringBatch official site and the reference guide I would be thankful if anyone gives me any other relevant links, tutorials, examples or whatever that can help me in my work with SpringBatch.

[Chris Schaefer]

1) sure, you can do whatever custom logging you want, heres a possible example from the docs: http://static.springsource.org/sprin...ingAndFailures

2) if your using CommandLineJobRunner you pass the job name and params -- possibly pass in your dates as params to that job that way

3) not sure i follow this but you should be able to use standard spring injection to set things into tasklets / custom reader/writers/etc

4) id guess because step A is marked as complete and allow-start-if-complete isn't true

you can find a number of examples in the spring batch distro

[isma3ilovich]

Hi Mr. Chris,
do you have any example of passing dates as params ?

[Chris Schaefer]

from the documentation:

bash$ java CommandLineJobRunner endOfDayJob.xml endOfDay schedule.date(date)=2008/01/01

[khourafi]

Thank you Chris,

For the first 3 questions, it's OK, but for the last one, what you seggested, namely allow-start-if-complete sat at true, works as follows: stepA, StepA, stepA indefinetly and it's not what I want. But thank you anyway for your help. If anybody has more information , please share it.

[Chris Schaefer]

this config:

  <job id="testJob">
    <step id="logMessage" next="logNextMessage">
      <tasklet ref="logMessageTasklet" allow-start-if-complete="true"/>
    </step>
    <step id="logNextMessage" next="logMessage">
      <tasklet ref="logMessageTasklet" allow-start-if-complete="true"/>
    </step>
  </job>

for me, using batch 2.1.0.RELEASE results in:

logMessage -> logNextMessage -> logMessage -> logNextMessage in an endless loop

that seems like what you want, no?

if so, you will get warnings about duplicate steps, see for more info: https://jira.springsource.org/browse/BATCH-1434

[khourafi]

Thank you chris,
that's what I want, Iwill try it and let you know

[khourafi]

Hi Chris,

Your suggestion is working. Thank you.