/
function.go
70 lines (62 loc) · 1.84 KB
/
function.go
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package alias
import (
"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 alias struct {
interfaces.FunctionBase
}
func GetOrder() interfaces.Order {
return interfaces.Any
}
func New(configFile string) []interfaces.FunctionMetadata {
res := make([]interfaces.FunctionMetadata, 0)
f := &alias{}
for _, n := range []string{"alias"} {
res = append(res, interfaces.FunctionMetadata{Name: n, F: f})
}
return res
}
func (f *alias) 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
}
alias, err := e.GetStringArg(1)
if err != nil {
return nil, err
}
var results []*types.MetricData
for _, a := range arg {
r := *a
r.Name = alias
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 *alias) Description() map[string]types.FunctionDescription {
return map[string]types.FunctionDescription{
"alias": {
Description: "Takes one metric or a wildcard seriesList and a string in quotes.\nPrints the string instead of the metric name in the legend.\n\n.. code-block:: none\n\n &target=alias(Sales.widgets.largeBlue,\"Large Blue Widgets\")",
Function: "alias(seriesList, newName)",
Group: "Alias",
Module: "graphite.render.functions",
Name: "alias",
Params: []types.FunctionParam{
{
Name: "seriesList",
Required: true,
Type: types.SeriesList,
},
{
Name: "newName",
Required: true,
Type: types.String,
},
},
},
}
}