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Re: Event Lisner I Presume - Triggering Code
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Re: Event Lisner I Presume - Triggering Code


  • Subject: Re: Event Lisner I Presume - Triggering Code
  • From: Jonathan Rochkind <email@hidden>
  • Date: Tue, 17 Feb 2004 11:48:40 -0600

I believe you can use a java.util.Timer.

There used to be an NSTimer, but I think that disappeared with 5.0, since you could use a standard java.util.Timer instead.

Of course, if you are setting the timer for a far distant time, like seems to be indicated in your example code (days? weeks?), then if your application instance is restarted before that time, you'll lose the timer. So you'll need a more complicated scheme involving external storage of the date and associated information.

Perhaps you could both set a timer, and store the date in a database somewhere. When the timer fires, it removes the entry from the db. When the app starts up, it creates timers for anything that is in the database.

Or maybe even better, I'd just make an entirely seperate application for sending the notifications. Your primary application(s) store info in the database about notifications needed (and remove entries from the db when account setup has occured, and notification isn't needed). The seperate notifying application uses a Timer to check the database periodically (once a day? Once an hour? Once every ten minutes?) for notificatoins needed, and then sends them (and removes the entries from the db). Of course, this notification stuff doesn't need to occur in a seperate application, you could have it as part of the primary application(s) too theoretically, but it seems somehow safer and simpler just to put it in it's own application (sharing frameworks with the other application(s) of course, in order to have access to the model for the db and any other common code needed).

Basically, there are a variety of ways you could do it, but java.util.Timer should be useful.

--Jonathan

At 5:18 PM +0000 2/17/04, Jonathan Fleming wrote:
I want to trigger a piece of code to run at a determined time, say from code such as in this NSLog.out.appendln:

NSLog.out.appendln(" registration creationDate is: " + creationDate + "\r" +
" account must be setup by: " + timeLapse + "\r" +
" Date/Time now is: " + now + ".\r" +
" 1st email reminder date: " + timeLapseR1 +" " + now.equals(timeLapseR1) + ".\r" +
" 2nd email reminder date: " + timeLapseR2 +" " + now.equals(timeLapseR2)+"\r");


When timeLapseR1 equals it's stated time the email sender will do it's thing and all will be well...
again when the time reaches that for timeLapseR2 the same thing happens another email is sent and we're happy.


How do I do that from application.java... trigger code to run at a determined time.
I can use the after() method but that then means the code is triggered everytime an app instance is restarted... I just don't know what to use to do what is needed.


Offers of help greatly respected
Jonathan :^)

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 >Event Lisner I Presume - Triggering Code (From: "Jonathan Fleming" <email@hidden>)

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