bilibili-backup/app/service/ops/log-agent/output/output.go
2019-04-22 02:59:20 +00:00

96 lines
2.2 KiB
Go

package output
import (
"fmt"
"context"
"go-common/app/service/ops/log-agent/event"
"go-common/library/log"
"github.com/BurntSushi/toml"
)
type configDecodeFunc = func(md toml.MetaData, primValue toml.Primitive) (c interface{}, err error)
type Output interface {
Run() (err error)
Stop()
InputChan() (chan *event.ProcessorEvent)
}
// Factory is used to register functions creating new Input instances.
type Factory = func(ctx context.Context, config interface{}) (Output, error)
var registry = make(map[string]Factory)
var runningOutput = make(map[string]Output)
func Register(name string, factory Factory) error {
log.Info("Registering output factory")
if name == "" {
return fmt.Errorf("Error registering output: name cannot be empty")
}
if factory == nil {
return fmt.Errorf("Error registering output '%v': factory cannot be empty", name)
}
if _, exists := registry[name]; exists {
return fmt.Errorf("Error registering output '%v': already registered", name)
}
registry[name] = factory
log.Info("Successfully registered output")
return nil
}
func OutputExists(name string) bool {
_, exists := registry[name]
return exists
}
func GetFactory(name string) (Factory, error) {
if _, exists := registry[name]; !exists {
return nil, fmt.Errorf("Error creating output. No such output type exist: '%v'", name)
}
return registry[name], nil
}
func GetOutputChan(name string) (chan *event.ProcessorEvent, error) {
if name == "" {
name = "lancer-ops-log"
}
if _, exists := runningOutput[name]; !exists {
return nil, fmt.Errorf("Error getting output chan. No such output chan exist: '%v'", name)
}
return runningOutput[name].InputChan(), nil
}
func OutputRunning(name string) bool {
_, exists := runningOutput[name]
return exists
}
func RegisterOutput(name string, o Output) (error) {
if name == "" {
return nil
}
if _, exists := runningOutput[name]; exists {
return fmt.Errorf("output %s already running", name)
}
runningOutput[name] = o
return nil
}
func ChanConnect(ctx context.Context, from <-chan *event.ProcessorEvent, to chan<- *event.ProcessorEvent) {
go func() {
for {
select {
case <-ctx.Done():
return
case e := <-from:
to <- e
}
}
}()
return
}