Reputation: 1
Code:
public class ComputeScheduleExample {
/**
* Executes example.
*
* @param args Command line arguments, none required.
* @throws IgniteException If example execution failed.
*/
public static void main(String[] args) throws IgniteException {
try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
System.out.println();
System.out.println("Compute schedule example started.");
// Schedule output message every minute.
SchedulerFuture<?> fut = ignite.scheduler().scheduleLocal(
new Callable<Integer>() {
private int invocations;
@Override public Integer call() {
invocations++;
ignite.compute().broadcast(
new IgniteRunnable() {
@Override public void run() {
System.out.println();
System.out.println("Howdy! :)");
}
}
);
return invocations;
}
},
// Callable object broadcasts a phrase to all cluster nodes every minute
// three times with initial scheduling delay equal to five seconds.
// https://apacheignite.readme.io/docs/cron-based-scheduling#syntax-extension
"{5, 3} * * * * *" // Cron expression.
);
while (!fut.isDone())
System.out.println(">>> Invocation #: " + fut.get());
// In case the Cron expression is invalid, SchedulerFuture will be immediately completed with an error,
// that provides additional details.
fut.get();
System.out.println();
System.out.println(">>> Schedule future is done and has been unscheduled.");
System.out.println(">>> Check all nodes for hello message output.");
}
}
}
Dependencies:
<dependency>
<groupId>org.apache.ignite</groupId>
<artifactId>ignite-core</artifactId>
<version>2.12.0</version>
</dependency>
<dependency>
<groupId>org.apache.ignite</groupId>
<artifactId>ignite-schedule</artifactId>
<version>1.0.0</version>
<exclusions>
<exclusion>
<artifactId>ignite-core</artifactId>
<groupId>org.apache.ignite</groupId>
</exclusion>
</exclusions>
</dependency>
Upvotes: 0
Views: 296
Reputation: 885
The issue happens due to use of incompatible ignite-schedule
dependency version.
As was discussed here, ignite-schedule
is an optional LGPL dependency and it's not published to the apache maven repository.
As a workaround, you can build the module using the source code, which is available here.
Upvotes: 1