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SpawningOtherTasksMain.java
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SpawningOtherTasksMain.java
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/*
* Copyright (C) Gustav Karlsson
*
* <p>Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* <p>http://www.apache.org/licenses/LICENSE-2.0
*
* <p>Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.kagkarlsson.examples;
import com.github.kagkarlsson.examples.helpers.Example;
import com.github.kagkarlsson.scheduler.Scheduler;
import com.github.kagkarlsson.scheduler.SchedulerClient;
import com.github.kagkarlsson.scheduler.task.helper.OneTimeTask;
import com.github.kagkarlsson.scheduler.task.helper.RecurringTask;
import com.github.kagkarlsson.scheduler.task.helper.Tasks;
import com.github.kagkarlsson.scheduler.task.schedule.FixedDelay;
import java.time.Duration;
import java.time.Instant;
import javax.sql.DataSource;
public class SpawningOtherTasksMain extends Example {
public static void main(String[] args) {
new SpawningOtherTasksMain().runWithDatasource();
}
@Override
public void run(DataSource dataSource) {
final OneTimeTask<Integer> printer =
Tasks.oneTime("printer", Integer.class)
.execute(
(taskInstance, executionContext) -> {
System.out.println("Printer: " + taskInstance.getData());
});
final RecurringTask<Void> spawner =
Tasks.recurring("spawner", FixedDelay.ofSeconds(5))
.execute(
(taskInstance, executionContext) -> {
final SchedulerClient client = executionContext.getSchedulerClient();
final long id = System.currentTimeMillis();
System.out.println("Scheduling printer executions.");
for (int i = 0; i < 5; i++) {
client.schedule(printer.instance("print" + id + i, i), Instant.now());
}
});
final Scheduler scheduler =
Scheduler.create(dataSource, printer)
.pollingInterval(Duration.ofSeconds(1))
.startTasks(spawner)
.registerShutdownHook()
.build();
scheduler.start();
}
}