cc-metric-collector/sinks/sinkManager.go

167 lines
3.9 KiB
Go

package sinks
import (
"encoding/json"
"os"
"sync"
cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
)
// Map of all available sinks
var AvailableSinks = map[string]Sink{
"influxdb": new(InfluxSink),
"stdout": new(StdoutSink),
"nats": new(NatsSink),
"http": new(HttpSink),
"ganglia": new(GangliaSink),
}
// Metric collector manager data structure
type sinkManager struct {
input chan lp.CCMetric // input channel
outputs []Sink // List of sinks to use
done chan bool // channel to finish / stop metric sink manager
wg *sync.WaitGroup // wait group for all goroutines in cc-metric-collector
config []sinkConfig // json encoded config for sink manager
}
// Sink manager access functions
type SinkManager interface {
Init(wg *sync.WaitGroup, sinkConfigFile string) error
AddInput(input chan lp.CCMetric)
AddOutput(config json.RawMessage) error
Start()
Close()
}
func (sm *sinkManager) Init(wg *sync.WaitGroup, sinkConfigFile string) error {
sm.input = nil
sm.outputs = make([]Sink, 0)
sm.done = make(chan bool)
sm.wg = wg
sm.config = make([]sinkConfig, 0)
// Read sink config file
if len(sinkConfigFile) > 0 {
configFile, err := os.Open(sinkConfigFile)
if err != nil {
cclog.ComponentError("SinkManager", err.Error())
return err
}
defer configFile.Close()
jsonParser := json.NewDecoder(configFile)
var rawConfigs []json.RawMessage
err = jsonParser.Decode(&rawConfigs)
if err != nil {
cclog.ComponentError("SinkManager", err.Error())
return err
}
for _, raw := range rawConfigs {
err = sm.AddOutput(raw)
if err != nil {
continue
}
}
}
return nil
}
func (sm *sinkManager) Start() {
batchcount := 20
sm.wg.Add(1)
go func() {
defer sm.wg.Done()
// Sink manager is done
done := func() {
for _, s := range sm.outputs {
s.Flush()
s.Close()
}
close(sm.done)
cclog.ComponentDebug("SinkManager", "DONE")
}
for {
select {
case <-sm.done:
done()
return
case p := <-sm.input:
// Send received metric to all outputs
cclog.ComponentDebug("SinkManager", "WRITE", p)
for _, s := range sm.outputs {
s.Write(p)
}
// Flush all outputs
if batchcount == 0 {
cclog.ComponentDebug("SinkManager", "FLUSH")
for _, s := range sm.outputs {
s.Flush()
}
batchcount = 20
}
batchcount--
}
}
}()
// Sink manager is started
cclog.ComponentDebug("SinkManager", "STARTED")
}
// AddInput adds the input channel to the sink manager
func (sm *sinkManager) AddInput(input chan lp.CCMetric) {
sm.input = input
}
func (sm *sinkManager) AddOutput(rawConfig json.RawMessage) error {
var err error
var config sinkConfig
if len(rawConfig) > 3 {
err = json.Unmarshal(rawConfig, &config)
if err != nil {
cclog.ComponentError("SinkManager", "SKIP", config.Type, "JSON config error:", err.Error())
return err
}
}
if _, found := AvailableSinks[config.Type]; !found {
cclog.ComponentError("SinkManager", "SKIP", config.Type, "unknown sink:", err.Error())
return err
}
s := AvailableSinks[config.Type]
err = s.Init(config)
if err != nil {
cclog.ComponentError("SinkManager", "SKIP", s.Name(), "initialization failed:", err.Error())
return err
}
sm.outputs = append(sm.outputs, s)
sm.config = append(sm.config, config)
cclog.ComponentDebug("SinkManager", "ADD SINK", s.Name())
return nil
}
// Close finishes / stops the sink manager
func (sm *sinkManager) Close() {
cclog.ComponentDebug("SinkManager", "CLOSE")
sm.done <- true
// wait for close of channel sm.done
<-sm.done
}
// New creates a new initialized sink manager
func New(wg *sync.WaitGroup, sinkConfigFile string) (SinkManager, error) {
sm := &sinkManager{}
err := sm.Init(wg, sinkConfigFile)
if err != nil {
return nil, err
}
return sm, err
}