Add samples for collectors, sinks and receivers

receivers/sampleReceiver.go

@@ -0,0 +1,77 @@
+package receivers
+
+import (
+	"encoding/json"
+	"fmt"
+
+	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
+)
+
+type SampleReceiverConfig struct {
+	Type string `json:"type"`
+	Addr string `json:"address"`
+	Port string `json:"port"`
+}
+
+type SampleReceiver struct {
+	receiver
+	config SampleReceiverConfig
+
+	// Storage for static information
+	meta map[string]string
+	// Use in case of own go routine
+	// done chan bool
+	// wg   sync.WaitGroup
+}
+
+func (r *SampleReceiver) Start() {
+	cclog.ComponentDebug(r.name, "START")
+
+	// Start server process like http.ListenAndServe()
+
+	// or use own go routine but always make sure it exits
+	// as soon as it gets the signal of the r.done channel
+	// r.wg.Add(1)
+	// go func() {
+	// 	for {
+	// 		select {
+	// 		case <-r.done:
+	// 			r.wg.Done()
+	// 			return
+	// 		}
+	// 	}
+	// 	r.wg.Done()
+	// }()
+}
+
+func (r *SampleReceiver) Close() {
+	cclog.ComponentDebug(r.name, "CLOSE")
+
+	// Close server like http.Shutdown()
+
+	// in case of own go routine, send the signal and wait
+	// r.done <- true
+	// r.wg.Wait()
+}
+
+func NewSampleReceiver(name string, config json.RawMessage) (Receiver, error) {
+	r := new(SampleReceiver)
+	r.name = fmt.Sprintf("HttpReceiver(%s)", name)
+
+	// Set static information
+	r.meta = map[string]string{"source": r.name}
+
+	// Read the sample receiver specific JSON config
+	if len(config) > 0 {
+		err := json.Unmarshal(config, &r.config)
+		if err != nil {
+			cclog.ComponentError(r.name, "Error reading config:", err.Error())
+			return nil, err
+		}
+	}
+
+	// Check that all required fields in the configuration are set
+	// Use 'if len(r.config.Option) > 0' for strings
+
+	return r, nil
+}