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output.go
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output.go
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package shim
import (
"bufio"
"fmt"
"github.com/circonus-labs/circonus-unified-agent/cua"
"github.com/circonus-labs/circonus-unified-agent/plugins/parsers"
)
// AddOutput adds the input to the shim. Later calls to Run() will run this.
func (s *Shim) AddOutput(output cua.Output) error {
setLoggerOnPlugin(output, s.Log())
if p, ok := output.(cua.Initializer); ok {
err := p.Init()
if err != nil {
return fmt.Errorf("failed to init input: %w", err)
}
}
s.Output = output
return nil
}
func (s *Shim) RunOutput() error {
parser, err := parsers.NewInfluxParser()
if err != nil {
return fmt.Errorf("Failed to create new parser: %w", err)
}
err = s.Output.Connect()
if err != nil {
return fmt.Errorf("failed to start processor: %w", err)
}
defer s.Output.Close()
var m cua.Metric
scanner := bufio.NewScanner(s.stdin)
for scanner.Scan() {
m, err = parser.ParseLine(scanner.Text())
if err != nil {
fmt.Fprintf(s.stderr, "Failed to parse metric: %s\n", err)
continue
}
if err = s.Output.Write([]cua.Metric{m}); err != nil {
fmt.Fprintf(s.stderr, "Failed to write metric: %s\n", err)
}
}
return nil
}