forked from juju/juju
/
manifold.go
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/
manifold.go
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// Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package metricworker
import (
"github.com/juju/errors"
"github.com/juju/worker/v3"
"github.com/juju/worker/v3/dependency"
"github.com/DavinZhang/juju/api/base"
"github.com/DavinZhang/juju/api/metricsmanager"
"github.com/DavinZhang/juju/cmd/jujud/agent/engine"
)
// Logger represents the methods used by the worker to log details.
type Logger interface {
Warningf(string, ...interface{})
}
// ManifoldConfig describes the resources used by metrics workers.
type ManifoldConfig struct {
APICallerName string
Logger Logger
}
// Manifold returns a Manifold that encapsulates various metrics workers.
func Manifold(config ManifoldConfig) dependency.Manifold {
return engine.APIManifold(
engine.APIManifoldConfig{
APICallerName: config.APICallerName,
},
config.start,
)
}
// start creates a runner for the metrics workers, given a base.APICaller.
func (c *ManifoldConfig) start(apiCaller base.APICaller) (worker.Worker, error) {
client, err := metricsmanager.NewClient(apiCaller)
if err != nil {
return nil, errors.Trace(err)
}
w, err := newMetricsManager(client, nil, c.Logger)
if err != nil {
return nil, errors.Trace(err)
}
return w, nil
}