Use new sink instances to allow multiple of same sink type

sinks/gangliaSink.go

@@ -33,9 +33,9 @@ type GangliaSink struct {
 	config         GangliaSinkConfig
 }
 
-func (s *GangliaSink) Init(config json.RawMessage) error {
+func (s *GangliaSink) Init(name string, config json.RawMessage) error {
 	var err error = nil
-	s.name = "GangliaSink"
+	s.name = fmt.Sprintf("GangliaSink(%s)", name)
 	s.config.AddTagsAsDesc = false
 	s.config.AddGangliaGroup = false
 	if len(config) > 0 {
@@ -168,4 +168,8 @@ func (s *GangliaSink) Flush() error {
 func (s *GangliaSink) Close() {
 }
 
-func NewGangliaSink()
+func NewGangliaSink(name string, config json.RawMessage) (Sink, error) {
+	s := new(GangliaSink)
+	s.Init(name, config)
+	return s, nil
+}

sinks/httpSink.go

@@ -38,9 +38,9 @@ type HttpSink struct {
 	flushDelay      time.Duration
 }
 
-func (s *HttpSink) Init(config json.RawMessage) error {
+func (s *HttpSink) Init(name string, config json.RawMessage) error {
 	// Set default values
-	s.name = "HttpSink"
+	s.name = fmt.Sprintf("HttpSink(%s)", name)
 	s.config.MaxIdleConns = 10
 	s.config.IdleConnTimeout = "5s"
 	s.config.Timeout = "5s"
@@ -169,3 +169,9 @@ func (s *HttpSink) Close() {
 	}
 	s.client.CloseIdleConnections()
 }
+
+func NewHttpSink(name string, config json.RawMessage) (Sink, error) {
+	s := new(HttpSink)
+	s.Init(name, config)
+	return s, nil
+}

sinks/influxAsyncSink.go

@@ -68,8 +68,8 @@ func (s *InfluxAsyncSink) connect() error {
 	return nil
 }
 
-func (s *InfluxAsyncSink) Init(config json.RawMessage) error {
-	s.name = "InfluxSink"
+func (s *InfluxAsyncSink) Init(name string, config json.RawMessage) error {
+	s.name = fmt.Sprintf("InfluxSink(%s)", name)
 
 	// Set default for maximum number of points sent to server in single request.
 	s.config.BatchSize = 100
@@ -118,3 +118,9 @@ func (s *InfluxAsyncSink) Close() {
 	s.writeApi.Flush()
 	s.client.Close()
 }
+
+func NewInfluxAsyncSink(name string, config json.RawMessage) (Sink, error) {
+	s := new(InfluxAsyncSink)
+	s.Init(name, config)
+	return s, nil
+}

sinks/influxSink.go

@@ -57,8 +57,8 @@ func (s *InfluxSink) connect() error {
 	return nil
 }
 
-func (s *InfluxSink) Init(config json.RawMessage) error {
-	s.name = "InfluxSink"
+func (s *InfluxSink) Init(name string, config json.RawMessage) error {
+	s.name = fmt.Sprintf("InfluxSink(%s)", name)
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &s.config)
 		if err != nil {
@@ -94,3 +94,9 @@ func (s *InfluxSink) Close() {
 	cclog.ComponentDebug(s.name, "Closing InfluxDB connection")
 	s.client.Close()
 }
+
+func NewInfluxSink(name string, config json.RawMessage) (Sink, error) {
+	s := new(InfluxSink)
+	s.Init(name, config)
+	return s, nil
+}

sinks/libgangliaSink.go

@@ -109,9 +109,9 @@ type LibgangliaSink struct {
 	cstrCache      map[string]*C.char
 }
 
-func (s *LibgangliaSink) Init(config json.RawMessage) error {
+func (s *LibgangliaSink) Init(name string, config json.RawMessage) error {
 	var err error = nil
-	s.name = "LibgangliaSink"
+	s.name = fmt.Sprintf("LibgangliaSink(%s)", name)
 	//s.config.AddTagsAsDesc = false
 	s.config.AddGangliaGroup = false
 	s.config.AddTypeToName = false
@@ -316,3 +316,9 @@ func (s *LibgangliaSink) Close() {
 		C.free(unsafe.Pointer(cstr))
 	}
 }
+
+func NewLibgangliaSink(name string, config json.RawMessage) (Sink, error) {
+	s := new(LibgangliaSink)
+	s.Init(name, config)
+	return s, nil
+}

sinks/metricSink.go

@@ -17,7 +17,7 @@ type sink struct {
 }
 
 type Sink interface {
-	Init(config json.RawMessage) error
+	Init(name string, config json.RawMessage) error
 	Write(point lp.CCMetric) error
 	Flush() error
 	Close()

sinks/natsSink.go

@@ -53,8 +53,8 @@ func (s *NatsSink) connect() error {
 	return nil
 }
 
-func (s *NatsSink) Init(config json.RawMessage) error {
-	s.name = "NatsSink"
+func (s *NatsSink) Init(name string, config json.RawMessage) error {
+	s.name = fmt.Sprintf("NatsSink(%s)", name)
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &s.config)
 		if err != nil {
@@ -105,3 +105,9 @@ func (s *NatsSink) Close() {
 		s.client.Close()
 	}
 }
+
+func NewNatsSink(name string, config json.RawMessage) (Sink, error) {
+	s := new(NatsSink)
+	s.Init(name, config)
+	return s, nil
+}

sinks/sinkManager.go

@@ -13,14 +13,14 @@ import (
 const SINK_MAX_FORWARD = 50
 
 // 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),
-	"influxasync": new(InfluxAsyncSink),
-	"libganglia":  new(LibgangliaSink),
+var AvailableSinks = map[string]func(name string, config json.RawMessage) (Sink, error){
+	"ganglia":     NewGangliaSink,
+	"libganglia":  NewLibgangliaSink,
+	"stdout":      NewStdoutSink,
+	"nats":        NewNatsSink,
+	"influxdb":    NewInfluxSink,
+	"influxasync": NewInfluxAsyncSink,
+	"http":        NewHttpSink,
 }
 
 // Metric collector manager data structure
@@ -149,8 +149,7 @@ func (sm *sinkManager) AddOutput(name string, rawConfig json.RawMessage) error {
 		cclog.ComponentError("SinkManager", "SKIP", name, "unknown sink:", sinkConfig.Type)
 		return err
 	}
-	s := AvailableSinks[sinkConfig.Type]
-	err = s.Init(rawConfig)
+	s, err := AvailableSinks[sinkConfig.Type](name, rawConfig)
 	if err != nil {
 		cclog.ComponentError("SinkManager", "SKIP", s.Name(), "initialization failed:", err.Error())
 		return err

sinks/stdoutSink.go

@@ -19,8 +19,8 @@ type StdoutSink struct {
 	}
 }
 
-func (s *StdoutSink) Init(config json.RawMessage) error {
-	s.name = "StdoutSink"
+func (s *StdoutSink) Init(name string, config json.RawMessage) error {
+	s.name = fmt.Sprintf("StdoutSink(%s)", name)
 	if len(config) > 0 {
 		err := json.Unmarshal(config, &s.config)
 		if err != nil {
@@ -65,3 +65,9 @@ func (s *StdoutSink) Close() {
 		s.output.Close()
 	}
 }
+
+func NewStdoutSink(name string, config json.RawMessage) (Sink, error) {
+	s := new(StdoutSink)
+	s.Init(name, config)
+	return s, nil
+}