CODEWITHSUNDEEP
grails
Henrik
Henrik

Reputation: 3777

Send feedback to the user for a long running operation in Grails?

I have a long running operation in my Grails application. My first solution is simply to perform the operation in the controller and let the user wait until the action is finished. This is not an acceptable solution, I want to show the user the progress of the action. The progress is simply text. The action can take from 10 seconds to roughly 30 minutes.

How can I show the progress to the user for my long running action?

Upvotes: 1

Views: 801

Answers (4)

Steve
Steve

Reputation: 1467

First you might want to try the Executor plugin so you can run the job in the background. This works quite well.

Then I guess you have 2 options. Have the browser poll the server via Ajax for an update (as Tim pointed out the JProgress plugin would do something like this for you) or get even more bleeding edge and consider HTML5 WebWorkers for a kind of server push approach. WebWorkers are not available in

Upvotes: 3

tim_yates
tim_yates

Reputation: 171184

The JProgress plugin might help, but I've never tried it out...

Upvotes: 0

34m0
34m0

Reputation: 5955

You will need something like a Task or Job domain class with a field percentageComplete. The controller will create and save the Task or Job and then spawn a new thread to execute it. Perhaps place the execution code in a service.

It will be up to your execution code to update the Task or Job's percentageComplete field as it completes its task. Then you can poll the job (via ajax) to see how the job is progressing.

Note: determining that percentage which is complete is very much to up to your specific code. You will probably have to just come up with a best guess based on the knowledge you have. Even for an operation where it is obvious how to determine percentage complete (like a file download), it is not certain (network issues, etc.)

Upvotes: 1

Similian
Similian

Reputation: 1

Can you determin the state of your progress? Let's say in percent? I would create the long operation as a quarz job (background) and query the state of job/ long running progress via ajax.

Upvotes: 0

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