CODEWITHSUNDEEP
playframeworkplayframework-1.x
Ronald Randon
Ronald Randon

Reputation: 1191

What is the use of jobs other than bootstrap jobs and scheduled jobs?

I know that jobs are useful to run a method in the start of the application (Bootstrap Job) and to run a method in a periodic interval of method (Scheduled Job).

But is there any other use of Jobs?

I mean, if I want to update the data in a database. In that case, do I want to write the code as a Job? If so, why are we doing that?

Please guide me on this.

I am using Play 1.2.5.

Thanks in advance.

Upvotes: 0

Views: 130

Answers (1)

ristes
ristes

Reputation: 86

There are several uses of the jobs in play. They are well explained in the official documentation. I'll summarize the documentation with example usages.

  • Bootstrapping Jobs
    • Initializing the application state, such as initial database data insert, loading Spring context etc.
  • Scheduled Jobs
    • Scheduled periodical tasks, such as batch db processing, report generation, daily reports etc.
  • Long running tasks (Triggering task jobs)
    • If you have a long running task, and you don't want to block the request i.e. you want to return response, even though the task is not finish, then this is appropriate case for using jobs.
      • In this cases, the jobs are most commonly combined with reverse ajax (Comet), in order to track the status of the job (good example is given here).
      • Other example is data importing with progress status. In this case, you should use class for persisting the progress status.
  • Shutdown Jobs
    • An example here is persisting the cache data, or other in-memory data, releasing some used resources etc.

In a regular database insert, I don't recommend using Job, since you should implement complicated techniques in order to obtain the result. As I mentioned earlier, if this task is very slow and you want to return the response faster, you can use a Job. Also, when you don't want to return the status of the database action (which is bad practice), and want to return the response faster, you can use Job. However, take care that the jobs are asynchronous and you must resolve the possible concurrency issues.

There are many more usages of the Jobs in Play (and in general) and it is impossible to cover them all, but I hope that this response will help you.

Upvotes: 2

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