82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
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package shim
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import (
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"errors"
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"fmt"
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"sync"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/agent"
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"github.com/influxdata/telegraf/models"
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"github.com/influxdata/telegraf/plugins/parsers/influx"
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"github.com/influxdata/telegraf/plugins/processors"
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)
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// AddProcessor adds the processor to the shim. Later calls to Run() will run this.
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func (s *Shim) AddProcessor(processor telegraf.Processor) error {
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models.SetLoggerOnPlugin(processor, s.Log())
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p := processors.NewStreamingProcessorFromProcessor(processor)
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return s.AddStreamingProcessor(p)
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}
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// AddStreamingProcessor adds the processor to the shim. Later calls to Run() will run this.
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func (s *Shim) AddStreamingProcessor(processor telegraf.StreamingProcessor) error {
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models.SetLoggerOnPlugin(processor, s.Log())
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if p, ok := processor.(telegraf.Initializer); ok {
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err := p.Init()
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if err != nil {
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return fmt.Errorf("failed to init input: %w", err)
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}
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}
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s.Processor = processor
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return nil
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}
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func (s *Shim) RunProcessor() error {
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acc := agent.NewAccumulator(s, s.metricCh)
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acc.SetPrecision(time.Nanosecond)
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err := s.Processor.Start(acc)
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if err != nil {
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return fmt.Errorf("failed to start processor: %w", err)
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}
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wg := sync.WaitGroup{}
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wg.Add(1)
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go func() {
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err := s.writeProcessedMetrics()
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if err != nil {
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s.log.Warn(err.Error())
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}
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wg.Done()
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}()
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parser := influx.NewStreamParser(s.stdin)
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for {
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m, err := parser.Next()
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if err != nil {
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if errors.Is(err, influx.EOF) {
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break // stream ended
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}
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var parseErr *influx.ParseError
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if errors.As(err, &parseErr) {
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fmt.Fprintf(s.stderr, "Failed to parse metric: %s\b", parseErr)
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continue
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}
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fmt.Fprintf(s.stderr, "Failure during reading stdin: %s\b", err)
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continue
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}
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if err = s.Processor.Add(m, acc); err != nil {
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fmt.Fprintf(s.stderr, "Failure during processing metric by processor: %v\b", err)
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}
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}
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close(s.metricCh)
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s.Processor.Stop()
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wg.Wait()
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return nil
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}
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