// Manifold returns a collect-metrics manifold.
func Manifold(config ManifoldConfig) dependency.Manifold {
return dependency.Manifold{
Inputs: []string{
config.AgentName,
config.MetricSpoolName,
config.CharmDirName,
},
Start: func(getResource dependency.GetResourceFunc) (worker.Worker, error) {
collector, err := newCollect(config, getResource)
if err != nil {
return nil, err
}
return spool.NewPeriodicWorker(collector.Do, collector.period, worker.NewTimer, collector.stop), nil
},
}
}
// Manifold creates a metric sender manifold.
func Manifold(config ManifoldConfig) dependency.Manifold {
return dependency.Manifold{
Inputs: []string{
config.AgentName,
config.APICallerName,
config.MetricSpoolName,
},
Start: func(context dependency.Context) (worker.Worker, error) {
var apicaller base.APICaller
var factory spool.MetricFactory
err := context.Get(config.APICallerName, &apicaller)
if err != nil {
return nil, errors.Trace(err)
}
err = context.Get(config.MetricSpoolName, &factory)
if err != nil {
return nil, errors.Trace(err)
}
var agent agent.Agent
if err := context.Get(config.AgentName, &agent); err != nil {
return nil, err
}
agentConfig := agent.CurrentConfig()
tag := agentConfig.Tag()
unitTag, ok := tag.(names.UnitTag)
if !ok {
return nil, errors.Errorf("expected a unit tag, got %v", tag)
}
paths := uniter.NewWorkerPaths(agentConfig.DataDir(), unitTag, "metrics-send")
client := newMetricAdderClient(apicaller)
s, err := newSender(client, factory, paths.State.BaseDir, unitTag.String())
if err != nil {
return nil, errors.Trace(err)
}
return spool.NewPeriodicWorker(s.Do, period, worker.NewTimer, s.stop), nil
},
}
}