Question

I searched google but couldn’t find articles/tutorials on how to create a custom trigger. Any pointers/suggestions are helpful. The custom trigger should wait until the below two conditions are met and then trigger a job

1. Time is past 5 PM
2. A record with particular value (say a column value for row id 10 is changed to “START”) has arrived in a given table

Answer 1

Disclaimer: I haven’t used Quartz before, but looking at the javadoc Trigger looks hard enough to implement. Can’t you just run your job every minute or hour or whatever and put something like the following up the top:

if (!new org.joda.time.DateTime().getHourOfDay() >= 17 || !databaseRowIsInPlace()) {
    return;
}

// Do complicated work