com.hubspot.singularity.scheduler.SingularitySchedulerPoller Maven / Gradle / Ivy

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package com.hubspot.singularity.scheduler;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;

import javax.inject.Singleton;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.name.Named;
import com.hubspot.mesos.JavaUtils;
import com.hubspot.singularity.config.SingularityConfiguration;
import com.hubspot.singularity.mesos.SingularityMesosModule;

@Singleton
public class SingularitySchedulerPoller extends SingularityLeaderOnlyPoller {

  private static final Logger LOG = LoggerFactory.getLogger(SingularitySchedulerPoller.class);

  private final SingularityScheduler scheduler;
  private final Provider stateCacheProvider;

  @Inject
  SingularitySchedulerPoller(Provider stateCacheProvider, SingularityScheduler scheduler,
      SingularityConfiguration configuration, @Named(SingularityMesosModule.SCHEDULER_LOCK_NAME) final Lock lock) {
    super(configuration.getCheckSchedulerEverySeconds(), TimeUnit.SECONDS, lock);

    this.stateCacheProvider = stateCacheProvider;
    this.scheduler = scheduler;
  }

  @Override
  public void runActionOnPoll() {
    final long start = System.currentTimeMillis();

    final SingularitySchedulerStateCache stateCache = stateCacheProvider.get();

    scheduler.checkForDecomissions(stateCache);
    scheduler.drainPendingQueue(stateCache);

    LOG.debug("Processed decomissions and pending queue in {}", JavaUtils.duration(start));
  }

}