github.com/niedbalski/juju@v0.0.0-20190215020005-8ff100488e47/worker/metricworker/cleanup.go (about)

     1  // Copyright 2014 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package metricworker
     5  
     6  import (
     7  	"time"
     8  
     9  	"github.com/juju/loggo"
    10  	"gopkg.in/juju/worker.v1"
    11  
    12  	"github.com/juju/juju/api/metricsmanager"
    13  	jworker "github.com/juju/juju/worker"
    14  )
    15  
    16  var cleanupLogger = loggo.GetLogger("juju.worker.metricworker.cleanup")
    17  
    18  const cleanupPeriod = time.Hour
    19  
    20  // NewCleanup creates a new periodic worker that calls the CleanupOldMetrics api.
    21  func newCleanup(client metricsmanager.MetricsManagerClient, notify chan string) worker.Worker {
    22  	f := func(stopCh <-chan struct{}) error {
    23  		err := client.CleanupOldMetrics()
    24  		if err != nil {
    25  			cleanupLogger.Warningf("failed to cleanup %v - will retry later", err)
    26  			return nil
    27  		}
    28  		select {
    29  		case notify <- "cleanupCalled":
    30  		default:
    31  		}
    32  		return nil
    33  	}
    34  	return jworker.NewPeriodicWorker(f, cleanupPeriod, jworker.NewTimer)
    35  }