github.com/axw/juju@v0.0.0-20161005053422-4bd6544d08d4/worker/metricworker/sender.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 senderLogger = loggo.GetLogger("juju.worker.metricworker.sender")
    16  
    17  const senderPeriod = 5 * time.Minute
    18  
    19  // NewSender creates a new periodic worker that sends metrics
    20  // to a collection service.
    21  func newSender(client metricsmanager.MetricsManagerClient, notify chan string) worker.Worker {
    22  	f := func(stopCh <-chan struct{}) error {
    23  		err := client.SendMetrics()
    24  		if err != nil {
    25  			senderLogger.Warningf("failed to send metrics %v - will retry later", err)
    26  			return nil
    27  		}
    28  		select {
    29  		case notify <- "senderCalled":
    30  		default:
    31  		}
    32  		return nil
    33  	}
    34  	return worker.NewPeriodicWorker(f, senderPeriod, worker.NewTimer)
    35  }