/
function.go
99 lines (87 loc) · 2.62 KB
/
function.go
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package legendValue
import (
"fmt"
"github.com/go-graphite/carbonapi/expr/helper"
"github.com/go-graphite/carbonapi/expr/interfaces"
"github.com/go-graphite/carbonapi/expr/types"
"github.com/go-graphite/carbonapi/pkg/parser"
)
type legendValue struct {
interfaces.FunctionBase
}
func GetOrder() interfaces.Order {
return interfaces.Any
}
func New(configFile string) []interfaces.FunctionMetadata {
res := make([]interfaces.FunctionMetadata, 0)
f := &legendValue{}
functions := []string{"legendValue"}
for _, n := range functions {
res = append(res, interfaces.FunctionMetadata{Name: n, F: f})
}
return res
}
// legendValue(seriesList, newName)
func (f *legendValue) Do(e parser.Expr, from, until int32, values map[parser.MetricRequest][]*types.MetricData) ([]*types.MetricData, error) {
arg, err := helper.GetSeriesArg(e.Args()[0], from, until, values)
if err != nil {
return nil, err
}
methods := make([]string, len(e.Args())-1)
for i := 1; i < len(e.Args()); i++ {
method, err := e.GetStringArg(i)
if err != nil {
return nil, err
}
methods[i-1] = method
}
var results []*types.MetricData
for _, a := range arg {
r := *a
for _, method := range methods {
summary := helper.SummarizeValues(method, a.Values)
r.Name = fmt.Sprintf("%s (%s: %f)", r.Name, method, summary)
}
results = append(results, &r)
}
return results, nil
}
// Description is auto-generated description, based on output of https://github.com/graphite-project/graphite-web
func (f *legendValue) Description() map[string]types.FunctionDescription {
return map[string]types.FunctionDescription{
"legendValue": {
Description: "Takes one metric or a wildcard seriesList and a string in quotes.\nAppends a value to the metric name in the legend. Currently one or several of: `last`, `avg`,\n`total`, `min`, `max`.\nThe last argument can be `si` (default) or `binary`, in that case values will be formatted in the\ncorresponding system.\n\n.. code-block:: none\n\n &target=legendValue(Sales.widgets.largeBlue, 'avg', 'max', 'si')",
Function: "legendValue(seriesList, *valueTypes)",
Group: "Alias",
Module: "graphite.render.functions",
Name: "legendValue",
Params: []types.FunctionParam{
{
Name: "seriesList",
Required: true,
Type: types.SeriesList,
},
{
Multiple: true,
Name: "valuesTypes",
Options: []string{
"average",
"count",
"diff",
"last",
"max",
"median",
"min",
"multiply",
"range",
"stddev",
"sum",
"si",
"binary",
},
Type: types.String,
},
},
},
}
}