GAE: Know if a specific task is on the queue

Question

I have to know if a specific task, specific by parameters on the url, is on the queue or not ... should it's possible ?

I'm using Java !

Thanks :)

Answer 1

You can probably do this using Named Tasks.

For example, you could hash the task parameters and set the result as the name. Then if you try and insert a task with the same parameters twice the second insertion would fail.

As mentioned before there are race conditions here, you might want to consider if there is a design where having more than once copy of the same task in the queue at any one time is not going to cause problems.