/
configs.go
66 lines (50 loc) · 1.85 KB
/
configs.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package configunmarshaler // import "go.opentelemetry.io/collector/otelcol/internal/configunmarshaler"
import (
"fmt"
"golang.org/x/exp/maps"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/confmap"
)
type Configs[F component.Factory] struct {
cfgs map[component.ID]component.Config
factories map[component.Type]F
}
func NewConfigs[F component.Factory](factories map[component.Type]F) *Configs[F] {
return &Configs[F]{factories: factories}
}
func (c *Configs[F]) Unmarshal(conf *confmap.Conf) error {
rawCfgs := make(map[component.ID]map[string]any)
if err := conf.Unmarshal(&rawCfgs); err != nil {
return err
}
// Prepare resulting map.
c.cfgs = make(map[component.ID]component.Config)
// Iterate over raw configs and create a config for each.
for id, value := range rawCfgs {
// Find factory based on component kind and type that we read from config source.
factory, ok := c.factories[id.Type()]
if !ok {
return errorUnknownType(id, maps.Keys(c.factories))
}
// Create the default config for this component.
cfg := factory.CreateDefaultConfig()
// Now that the default config struct is created we can Unmarshal into it,
// and it will apply user-defined config on top of the default.
if err := component.UnmarshalConfig(confmap.NewFromStringMap(value), cfg); err != nil {
return errorUnmarshalError(id, err)
}
c.cfgs[id] = cfg
}
return nil
}
func (c *Configs[F]) Configs() map[component.ID]component.Config {
return c.cfgs
}
func errorUnknownType(id component.ID, factories []component.Type) error {
return fmt.Errorf("unknown type: %q for id: %q (valid values: %v)", id.Type(), id, factories)
}
func errorUnmarshalError(id component.ID, err error) error {
return fmt.Errorf("error reading configuration for %q: %w", id, err)
}