ClickHouse/programs/diagnostics/internal/outputs/registry.go

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2022-04-27 12:22:20 +00:00
package outputs
import (
"fmt"
"github.com/ClickHouse/clickhouse-diagnostics/internal/platform/config"
"github.com/ClickHouse/clickhouse-diagnostics/internal/platform/data"
"github.com/pkg/errors"
"github.com/rs/zerolog/log"
)
type Output interface {
Write(id string, bundles map[string]*data.DiagnosticBundle, config config.Configuration) (data.FrameErrors, error)
Configuration() config.Configuration
Description() string
// TODO: we will need to implement this for the convert function
//Read(config config.Configuration) (data.DiagnosticBundle, error)
}
// Register can be called from init() on an output in this package
// It will automatically be added to the Outputs map to be called externally
func Register(name string, output OutputFactory) {
// names must be unique
if _, ok := Outputs[name]; ok {
log.Error().Msgf("More than 1 output is trying to register under the name %s. Names must be unique.", name)
}
Outputs[name] = output
}
// OutputFactory lets us use a closure to get instances of the output struct
type OutputFactory func() (Output, error)
var Outputs = map[string]OutputFactory{}
func GetOutputNames() []string {
outputs := make([]string, len(Outputs))
i := 0
for k := range Outputs {
outputs[i] = k
i++
}
return outputs
}
func GetOutputByName(name string) (Output, error) {
if outputFactory, ok := Outputs[name]; ok {
//do something here
output, err := outputFactory()
if err != nil {
return nil, errors.Wrapf(err, "output %s could not be initialized", name)
}
return output, nil
}
return nil, fmt.Errorf("%s is not a valid output name", name)
}
func BuildConfigurationOptions() (map[string]config.Configuration, error) {
configurations := make(map[string]config.Configuration)
for name, collectorFactory := range Outputs {
output, err := collectorFactory()
if err != nil {
return nil, errors.Wrapf(err, "output %s could not be initialized", name)
}
configurations[name] = output.Configuration()
}
return configurations, nil
}