telegraf/plugins/serializers/registry.go

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package serializers
import (
"fmt"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/plugins/serializers/graphite"
"github.com/influxdata/telegraf/plugins/serializers/influx"
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"github.com/influxdata/telegraf/plugins/serializers/json"
)
// SerializerOutput is an interface for output plugins that are able to
// serialize telegraf metrics into arbitrary data formats.
type SerializerOutput interface {
// SetSerializer sets the serializer function for the interface.
SetSerializer(serializer Serializer)
}
// Serializer is an interface defining functions that a serializer plugin must
// satisfy.
type Serializer interface {
// Serialize takes a single telegraf metric and turns it into a byte buffer.
// separate metrics should be separated by a newline, and there should be
// a newline at the end of the buffer.
Serialize(metric telegraf.Metric) ([]byte, error)
// SerializeBatch takes an array of telegraf metric and serializes it into
// a byte buffer. This method is not required to be suitable for use with
// line oriented framing.
SerializeBatch(metrics []telegraf.Metric) ([]byte, error)
}
// Config is a struct that covers the data types needed for all serializer types,
// and can be used to instantiate _any_ of the serializers.
type Config struct {
// Dataformat can be one of: influx, graphite, or json
DataFormat string
// Support tags in graphite protocol
GraphiteTagSupport bool
// Maximum line length in bytes; influx format only
InfluxMaxLineBytes int
// Sort field keys, set to true only when debugging as it less performant
// than unsorted fields; influx format only
InfluxSortFields bool
// Support unsigned integer output; influx format only
InfluxUintSupport bool
// Prefix to add to all measurements, only supports Graphite
Prefix string
// Template for converting telegraf metrics into Graphite
// only supports Graphite
Template string
// Timestamp units to use for JSON formatted output
TimestampUnits time.Duration
}
// NewSerializer a Serializer interface based on the given config.
func NewSerializer(config *Config) (Serializer, error) {
var err error
var serializer Serializer
switch config.DataFormat {
case "influx":
serializer, err = NewInfluxSerializerConfig(config)
case "graphite":
serializer, err = NewGraphiteSerializer(config.Prefix, config.Template, config.GraphiteTagSupport)
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case "json":
serializer, err = NewJsonSerializer(config.TimestampUnits)
default:
err = fmt.Errorf("Invalid data format: %s", config.DataFormat)
}
return serializer, err
}
func NewJsonSerializer(timestampUnits time.Duration) (Serializer, error) {
return json.NewSerializer(timestampUnits)
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}
func NewInfluxSerializerConfig(config *Config) (Serializer, error) {
var sort influx.FieldSortOrder
if config.InfluxSortFields {
sort = influx.SortFields
}
var typeSupport influx.FieldTypeSupport
if config.InfluxUintSupport {
typeSupport = typeSupport + influx.UintSupport
}
s := influx.NewSerializer()
s.SetMaxLineBytes(config.InfluxMaxLineBytes)
s.SetFieldSortOrder(sort)
s.SetFieldTypeSupport(typeSupport)
return s, nil
}
func NewInfluxSerializer() (Serializer, error) {
return influx.NewSerializer(), nil
}
func NewGraphiteSerializer(prefix, template string, tag_support bool) (Serializer, error) {
return &graphite.GraphiteSerializer{
Prefix: prefix,
Template: template,
TagSupport: tag_support,
}, nil
}