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ExponentialBackoffMain.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 static java.time.Duration.*;
import com.github.kagkarlsson.examples.helpers.Example;
import com.github.kagkarlsson.scheduler.Scheduler;
import com.github.kagkarlsson.scheduler.task.FailureHandler;
import com.github.kagkarlsson.scheduler.task.helper.OneTimeTask;
import com.github.kagkarlsson.scheduler.task.helper.Tasks;
import java.time.Instant;
import javax.sql.DataSource;
public class ExponentialBackoffMain extends Example {
public static void main(String[] args) {
new ExponentialBackoffMain().runWithDatasource();
}
@Override
public void run(DataSource dataSource) {
OneTimeTask<Void> failingTask =
Tasks.oneTime("exponential_backoff_task")
.onFailure(new FailureHandler.ExponentialBackoffFailureHandler<>(ofSeconds(1)))
.execute(
(taskInstance, executionContext) -> {
throw new RuntimeException("simulated task exception");
});
final Scheduler scheduler =
Scheduler.create(dataSource, failingTask)
.pollingInterval(ofSeconds(2))
.registerShutdownHook()
.build();
scheduler.schedule(failingTask.instance("1"), Instant.now());
scheduler.start();
}
}