mirror of
https://github.com/prometheus/prometheus.git
synced 2024-09-20 07:47:31 -07:00
106 lines
2.7 KiB
Go
106 lines
2.7 KiB
Go
// Copyright 2013 Prometheus Team
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package api
|
|
|
|
import (
|
|
"code.google.com/p/gorest"
|
|
"encoding/json"
|
|
"errors"
|
|
"github.com/prometheus/prometheus/rules"
|
|
"github.com/prometheus/prometheus/rules/ast"
|
|
"log"
|
|
"net/http"
|
|
"sort"
|
|
"time"
|
|
)
|
|
|
|
func (serv MetricsService) Query(expr string, formatJson string) (result string) {
|
|
exprNode, err := rules.LoadExprFromString(expr)
|
|
if err != nil {
|
|
return ast.ErrorToJSON(err)
|
|
}
|
|
|
|
timestamp := serv.time.Now()
|
|
|
|
rb := serv.ResponseBuilder()
|
|
var format ast.OutputFormat
|
|
if formatJson != "" {
|
|
format = ast.JSON
|
|
rb.SetContentType(gorest.Application_Json)
|
|
} else {
|
|
format = ast.TEXT
|
|
rb.SetContentType(gorest.Text_Plain)
|
|
}
|
|
|
|
return ast.EvalToString(exprNode, ×tamp, format)
|
|
}
|
|
|
|
func (serv MetricsService) QueryRange(expr string, end int64, duration int64, step int64) string {
|
|
exprNode, err := rules.LoadExprFromString(expr)
|
|
if err != nil {
|
|
return ast.ErrorToJSON(err)
|
|
}
|
|
if exprNode.Type() != ast.VECTOR {
|
|
return ast.ErrorToJSON(errors.New("Expression does not evaluate to vector type"))
|
|
}
|
|
rb := serv.ResponseBuilder()
|
|
rb.SetContentType(gorest.Application_Json)
|
|
|
|
if end == 0 {
|
|
end = serv.time.Now().Unix()
|
|
}
|
|
|
|
if step < 1 {
|
|
step = 1
|
|
}
|
|
|
|
if end-duration < 0 {
|
|
duration = end
|
|
}
|
|
|
|
// Align the start to step "tick" boundary.
|
|
end -= end % step
|
|
|
|
matrix, err := ast.EvalVectorRange(
|
|
exprNode.(ast.VectorNode),
|
|
time.Unix(end-duration, 0),
|
|
time.Unix(end, 0),
|
|
time.Duration(step)*time.Second)
|
|
if err != nil {
|
|
return ast.ErrorToJSON(err)
|
|
}
|
|
|
|
sort.Sort(matrix)
|
|
return ast.TypedValueToJSON(matrix, "matrix")
|
|
}
|
|
|
|
func (serv MetricsService) Metrics() string {
|
|
metricNames, err := serv.appState.Storage.GetAllValuesForLabel("name")
|
|
rb := serv.ResponseBuilder()
|
|
rb.SetContentType(gorest.Application_Json)
|
|
if err != nil {
|
|
log.Printf("Error loading metric names: %v", err)
|
|
rb.SetResponseCode(http.StatusInternalServerError)
|
|
return err.Error()
|
|
}
|
|
sort.Sort(metricNames)
|
|
resultBytes, err := json.Marshal(metricNames)
|
|
if err != nil {
|
|
log.Printf("Error marshalling metric names: %v", err)
|
|
rb.SetResponseCode(http.StatusInternalServerError)
|
|
return err.Error()
|
|
}
|
|
return string(resultBytes)
|
|
}
|