Long running process, show progress in UI

Question

I want to trigger a long running background process (coded as a service) from the ui. But I also want to show some progress of that task to the user.

How can I achieve this? (I want to not infringe on decoupling). Is there a best practice to solve it (combining design-patterns, eg. observer and command)?

The observer pattern on it's own is already a solution to this kind of problem. The Observee just has to inform observers everytime the progress changed. — Mare Infinitus, Jun 19 '12 at 08:01

score 3 · Answer 1 · answered Jun 19 '12 at 08:02

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Have look a JProgressBar and changes for progress could be invoked from Runnable#Thread or SwingWorker

answered Jun 19 '12 at 08:02

mKorbel

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score 3 · Answer 2 · edited May 23 '17 at 11:55

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Here is another example of a SwingWorker to do the heavy work, and to update a JProgressBar which is contained in the UI to show the progress to the user

edited May 23 '17 at 11:55

Community

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answered Jun 19 '12 at 08:20

Robin

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score 1 · Accepted Answer · answered Jun 19 '12 at 08:03

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Here is an example on how to use just the observer pattern to show progress in the UI. With JAVA sample code provided:

Using Observer Pattern to track progress while loading a page

answered Jun 19 '12 at 08:03

Mare Infinitus

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Long running process, show progress in UI

3 Answers3