com.github.kagkarlsson.scheduler.boot.config.startup.AbstractSchedulerStarter Maven / Gradle / Ivy
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/*
* Copyright (C) Gustav Karlsson
*
* 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
*
*
http://www.apache.org/licenses/LICENSE-2.0
*
*
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.scheduler.boot.config.startup;
import com.github.kagkarlsson.scheduler.Scheduler;
import com.github.kagkarlsson.scheduler.SchedulerState;
import com.github.kagkarlsson.scheduler.boot.config.DbSchedulerStarter;
import java.util.Objects;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class AbstractSchedulerStarter implements DbSchedulerStarter {
private final Logger log = LoggerFactory.getLogger(this.getClass());
private final Scheduler scheduler;
protected AbstractSchedulerStarter(Scheduler scheduler) {
this.scheduler = Objects.requireNonNull(scheduler, "A scheduler must be provided");
}
@Override
public void doStart() {
SchedulerState state = scheduler.getSchedulerState();
if (state.isShuttingDown()) {
log.warn("Scheduler is shutting down - will not attempting to start");
return;
}
if (state.isStarted()) {
log.info("Scheduler already started - will not attempt to start again");
return;
}
log.info("Triggering scheduler start");
scheduler.start();
}
}