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JVM - schedule.cron()

Sets the cron expressions that determines when the schedule triggers and a callback to be triggered.

import io.nitric.Nitric;
import io.nitric.faas.v0.Frequency;

public class Application {
  public static void main(String[] args) {
    // Create a schedule that runs at 1:00am on the 1st of every month
    Nitric.INSTANCE.schedule("send-reminder").cron("0 1 1 * *", (ctx) -> {
      // add code to run here
      return ctx;
    });

    Nitric.run();
  }
}

Parameters

Name
expression
Required
Required
Type
String
Description
The expression that sets when the schedule will be triggered. This value should be a standard 5 value Unix cron expression, e.g., '0 1 1 * *'.
Name
middleware
Required
Required
Type
EventMiddleware or List<EventMiddleware>
Description
One or more callback functions to use as the handler which will run on the defined frequency.

Examples

Create a Schedule

import io.nitric.Nitric;
import io.nitric.faas.v0.Frequency;

public class Application {
  public static void main(String[] args) {
    // every 15 minutes
    Nitric.INSTANCE.schedule("check for updates").cron("0/15 * * * *", (ctx) -> {
      System.out.println("checking for updates");
      return ctx;
    });

    // at 1:00am on the 1st of every month
    Nitric.INSTANCE.schedule("delete stale data").cron("0 1 1 * *", (ctx) -> {
      System.out.println("clearing data");
      return ctx;
    });

    Nitric.run();
  }
}