mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
synced 2024-11-10 04:27:25 +01:00
92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
package receivers
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import (
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"encoding/json"
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"fmt"
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cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
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)
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// SampleReceiver configuration: receiver type, listen address, port
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type SampleReceiverConfig struct {
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Type string `json:"type"`
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Addr string `json:"address"`
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Port string `json:"port"`
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}
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type SampleReceiver struct {
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receiver
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config SampleReceiverConfig
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// Storage for static information
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meta map[string]string
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// Use in case of own go routine
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// done chan bool
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// wg sync.WaitGroup
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}
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// Implement functions required for Receiver interface
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// Start(), Close()
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// See: metricReceiver.go
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func (r *SampleReceiver) Start() {
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cclog.ComponentDebug(r.name, "START")
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// Start server process like http.ListenAndServe()
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// or use own go routine but always make sure it exits
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// as soon as it gets the signal of the r.done channel
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// r.wg.Add(1)
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// go func() {
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// for {
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// select {
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// case <-r.done:
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// r.wg.Done()
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// return
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// }
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// }
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// r.wg.Done()
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// }()
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}
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// Close receiver: close network connection, close files, close libraries, ...
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func (r *SampleReceiver) Close() {
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cclog.ComponentDebug(r.name, "CLOSE")
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// Close server like http.Shutdown()
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// in case of own go routine, send the signal and wait
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// r.done <- true
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// r.wg.Wait()
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}
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// New function to create a new instance of the receiver
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// Initialize the receiver by giving it a name and reading in the config JSON
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func NewSampleReceiver(name string, config json.RawMessage) (Receiver, error) {
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r := new(SampleReceiver)
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// Set name of SampleReceiver
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// The name should be chosen in such a way that different instances of SampleReceiver can be distinguished
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r.name = fmt.Sprintf("SampleReceiver(%s)", name)
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// Set static information
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r.meta = map[string]string{"source": r.name}
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// Set defaults in r.config
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// Allow overwriting these defaults by reading config JSON
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// Read the sample receiver specific JSON config
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if len(config) > 0 {
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err := json.Unmarshal(config, &r.config)
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if err != nil {
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cclog.ComponentError(r.name, "Error reading config:", err.Error())
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return nil, err
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}
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}
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// Check that all required fields in the configuration are set
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// Use 'if len(r.config.Option) > 0' for strings
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return r, nil
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}
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