github.com/wallyworld/juju@v0.0.0-20161013125918-6cf1bc9d917a/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  
    11  	"github.com/juju/juju/api/metricsmanager"
    12  	"github.com/juju/juju/worker"
    13  )
    14  
    15  var cleanupLogger = loggo.GetLogger("juju.worker.metricworker.cleanup")
    16  
    17  const cleanupPeriod = time.Hour
    18  
    19  // NewCleanup creates a new periodic worker that calls the CleanupOldMetrics api.
    20  func newCleanup(client metricsmanager.MetricsManagerClient, notify chan string) worker.Worker {
    21  	f := func(stopCh <-chan struct{}) error {
    22  		err := client.CleanupOldMetrics()
    23  		if err != nil {
    24  			cleanupLogger.Warningf("failed to cleanup %v - will retry later", err)
    25  			return nil
    26  		}
    27  		select {
    28  		case notify <- "cleanupCalled":
    29  		default:
    30  		}
    31  		return nil
    32  	}
    33  	return worker.NewPeriodicWorker(f, cleanupPeriod, worker.NewTimer)
    34  }