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371 lines
10 KiB
371 lines
10 KiB
// Copyright 2013 Prometheus Team
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ast
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import (
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"encoding/json"
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"fmt"
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"sort"
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"strings"
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clientmodel "github.com/prometheus/client_golang/model"
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"github.com/prometheus/prometheus/stats"
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"github.com/prometheus/prometheus/storage/metric"
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"github.com/prometheus/prometheus/utility"
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)
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// OutputFormat is an enum for the possible output formats.
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type OutputFormat int
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// Possible output formats.
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const (
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TEXT OutputFormat = iota
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JSON
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)
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func (opType BinOpType) String() string {
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opTypeMap := map[BinOpType]string{
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ADD: "+",
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SUB: "-",
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MUL: "*",
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DIV: "/",
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MOD: "%",
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GT: ">",
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LT: "<",
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EQ: "==",
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NE: "!=",
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GE: ">=",
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LE: "<=",
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AND: "AND",
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OR: "OR",
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}
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return opTypeMap[opType]
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}
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func (aggrType AggrType) String() string {
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aggrTypeMap := map[AggrType]string{
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SUM: "SUM",
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AVG: "AVG",
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MIN: "MIN",
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MAX: "MAX",
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COUNT: "COUNT",
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}
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return aggrTypeMap[aggrType]
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}
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func (exprType ExprType) String() string {
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exprTypeMap := map[ExprType]string{
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SCALAR: "scalar",
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VECTOR: "vector",
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MATRIX: "matrix",
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STRING: "string",
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}
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return exprTypeMap[exprType]
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}
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func (vector Vector) String() string {
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metricStrings := make([]string, 0, len(vector))
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for _, sample := range vector {
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metricStrings = append(metricStrings,
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fmt.Sprintf("%s => %v @[%v]",
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sample.Metric,
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sample.Value, sample.Timestamp))
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}
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return strings.Join(metricStrings, "\n")
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}
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func (matrix Matrix) String() string {
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metricStrings := make([]string, 0, len(matrix))
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for _, sampleSet := range matrix {
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metricName, ok := sampleSet.Metric[clientmodel.MetricNameLabel]
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if !ok {
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panic("Tried to print matrix without metric name")
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}
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labelStrings := make([]string, 0, len(sampleSet.Metric)-1)
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for label, value := range sampleSet.Metric {
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if label != clientmodel.MetricNameLabel {
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labelStrings = append(labelStrings, fmt.Sprintf("%s=%q", label, value))
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}
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}
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sort.Strings(labelStrings)
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valueStrings := make([]string, 0, len(sampleSet.Values))
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for _, value := range sampleSet.Values {
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valueStrings = append(valueStrings,
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fmt.Sprintf("\n%v @[%v]", value.Value, value.Timestamp))
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}
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metricStrings = append(metricStrings,
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fmt.Sprintf("%s{%s} => %s",
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metricName,
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strings.Join(labelStrings, ", "),
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strings.Join(valueStrings, ", ")))
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}
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sort.Strings(metricStrings)
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return strings.Join(metricStrings, "\n")
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}
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// ErrorToJSON converts the given error into JSON.
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func ErrorToJSON(err error) string {
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errorStruct := struct {
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Type string
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Value string
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}{
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Type: "error",
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Value: err.Error(),
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}
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errorJSON, err := json.MarshalIndent(errorStruct, "", "\t")
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if err != nil {
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return ""
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}
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return string(errorJSON)
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}
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// TypedValueToJSON converts the given data of type 'scalar',
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// 'vector', or 'matrix' into its JSON representation.
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func TypedValueToJSON(data interface{}, typeStr string) string {
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dataStruct := struct {
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Type string
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Value interface{}
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}{
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Type: typeStr,
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Value: data,
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}
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dataJSON, err := json.MarshalIndent(dataStruct, "", "\t")
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if err != nil {
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return ErrorToJSON(err)
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}
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return string(dataJSON)
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}
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// EvalToString evaluates the given node into a string of the given format.
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func EvalToString(node Node, timestamp clientmodel.Timestamp, format OutputFormat, storage metric.PreloadingPersistence, queryStats *stats.TimerGroup) string {
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viewTimer := queryStats.GetTimer(stats.TotalViewBuildingTime).Start()
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viewAdapter, err := viewAdapterForInstantQuery(node, timestamp, storage, queryStats)
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viewTimer.Stop()
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if err != nil {
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panic(err)
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}
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evalTimer := queryStats.GetTimer(stats.InnerEvalTime).Start()
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switch node.Type() {
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case SCALAR:
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scalar := node.(ScalarNode).Eval(timestamp, viewAdapter)
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evalTimer.Stop()
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switch format {
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case TEXT:
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return fmt.Sprintf("scalar: %v @[%v]", scalar, timestamp)
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case JSON:
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return TypedValueToJSON(scalar, "scalar")
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}
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case VECTOR:
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vector := node.(VectorNode).Eval(timestamp, viewAdapter)
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evalTimer.Stop()
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switch format {
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case TEXT:
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return vector.String()
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case JSON:
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return TypedValueToJSON(vector, "vector")
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}
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case MATRIX:
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matrix := node.(MatrixNode).Eval(timestamp, viewAdapter)
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evalTimer.Stop()
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switch format {
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case TEXT:
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return matrix.String()
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case JSON:
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return TypedValueToJSON(matrix, "matrix")
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}
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case STRING:
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str := node.(StringNode).Eval(timestamp, viewAdapter)
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evalTimer.Stop()
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switch format {
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case TEXT:
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return str
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case JSON:
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return TypedValueToJSON(str, "string")
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}
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}
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panic("Switch didn't cover all node types")
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}
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// NodeTreeToDotGraph returns a DOT representation of the scalar
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// literal.
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func (node *ScalarLiteral) NodeTreeToDotGraph() string {
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return fmt.Sprintf("%#p[label=\"%v\"];\n", node, node.value)
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}
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func functionArgsToDotGraph(node Node, args []Node) string {
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graph := ""
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for _, arg := range args {
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graph += fmt.Sprintf("%#p -> %#p;\n", node, arg)
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}
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for _, arg := range args {
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graph += arg.NodeTreeToDotGraph()
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}
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return graph
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}
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// NodeTreeToDotGraph returns a DOT representation of the function
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// call.
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func (node *ScalarFunctionCall) NodeTreeToDotGraph() string {
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graph := fmt.Sprintf("%#p[label=\"%s\"];\n", node, node.function.name)
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graph += functionArgsToDotGraph(node, node.args)
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return graph
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}
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// NodeTreeToDotGraph returns a DOT representation of the expression.
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func (node *ScalarArithExpr) NodeTreeToDotGraph() string {
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graph := fmt.Sprintf(`
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%#p[label="%s"];
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%#p -> %#p;
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%#p -> %#p;
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%s
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%s
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}`, node, node.opType, node, node.lhs, node, node.rhs, node.lhs.NodeTreeToDotGraph(), node.rhs.NodeTreeToDotGraph())
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return graph
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}
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// NodeTreeToDotGraph returns a DOT representation of the vector selector.
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func (node *VectorSelector) NodeTreeToDotGraph() string {
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return fmt.Sprintf("%#p[label=\"%s\"];\n", node, node)
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}
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// NodeTreeToDotGraph returns a DOT representation of the function
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// call.
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func (node *VectorFunctionCall) NodeTreeToDotGraph() string {
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graph := fmt.Sprintf("%#p[label=\"%s\"];\n", node, node.function.name)
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graph += functionArgsToDotGraph(node, node.args)
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return graph
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}
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// NodeTreeToDotGraph returns a DOT representation of the vector
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// aggregation.
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func (node *VectorAggregation) NodeTreeToDotGraph() string {
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groupByStrings := make([]string, 0, len(node.groupBy))
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for _, label := range node.groupBy {
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groupByStrings = append(groupByStrings, string(label))
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}
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graph := fmt.Sprintf("%#p[label=\"%s BY (%s)\"]\n",
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node,
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node.aggrType,
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strings.Join(groupByStrings, ", "))
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graph += fmt.Sprintf("%#p -> %#p;\n", node, node.vector)
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graph += node.vector.NodeTreeToDotGraph()
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return graph
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}
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// NodeTreeToDotGraph returns a DOT representation of the expression.
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func (node *VectorArithExpr) NodeTreeToDotGraph() string {
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graph := fmt.Sprintf(`
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%#p[label="%s"];
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%#p -> %#p;
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%#p -> %#p;
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%s
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%s
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`, node, node.opType, node, node.lhs, node, node.rhs, node.lhs.NodeTreeToDotGraph(), node.rhs.NodeTreeToDotGraph())
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return graph
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}
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// NodeTreeToDotGraph returns a DOT representation of the matrix
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// selector.
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func (node *MatrixSelector) NodeTreeToDotGraph() string {
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return fmt.Sprintf("%#p[label=\"%s\"];\n", node, node)
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}
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// NodeTreeToDotGraph returns a DOT representation of the string
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// literal.
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func (node *StringLiteral) NodeTreeToDotGraph() string {
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return fmt.Sprintf("%#p[label=\"'%q'\"];\n", node, node.str)
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}
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// NodeTreeToDotGraph returns a DOT representation of the function
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// call.
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func (node *StringFunctionCall) NodeTreeToDotGraph() string {
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graph := fmt.Sprintf("%#p[label=\"%s\"];\n", node, node.function.name)
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graph += functionArgsToDotGraph(node, node.args)
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return graph
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}
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func (nodes Nodes) String() string {
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nodeStrings := make([]string, 0, len(nodes))
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for _, node := range nodes {
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nodeStrings = append(nodeStrings, node.String())
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}
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return strings.Join(nodeStrings, ", ")
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}
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func (node *ScalarLiteral) String() string {
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return fmt.Sprint(node.value)
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}
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func (node *ScalarFunctionCall) String() string {
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return fmt.Sprintf("%s(%s)", node.function.name, node.args)
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}
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func (node *ScalarArithExpr) String() string {
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return fmt.Sprintf("(%s %s %s)", node.lhs, node.opType, node.rhs)
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}
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func (node *VectorSelector) String() string {
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labelStrings := make([]string, 0, len(node.labelMatchers)-1)
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var metricName clientmodel.LabelValue
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for _, matcher := range node.labelMatchers {
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if matcher.Name != clientmodel.MetricNameLabel {
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labelStrings = append(labelStrings, fmt.Sprintf("%s%s%q", matcher.Name, matcher.Type, matcher.Value))
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} else {
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metricName = matcher.Value
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}
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}
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switch len(labelStrings) {
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case 0:
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return string(metricName)
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default:
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sort.Strings(labelStrings)
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return fmt.Sprintf("%s{%s}", metricName, strings.Join(labelStrings, ","))
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}
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}
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func (node *VectorFunctionCall) String() string {
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return fmt.Sprintf("%s(%s)", node.function.name, node.args)
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}
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func (node *VectorAggregation) String() string {
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aggrString := fmt.Sprintf("%s(%s)", node.aggrType, node.vector)
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if len(node.groupBy) > 0 {
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return fmt.Sprintf("%s BY (%s)", aggrString, node.groupBy)
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}
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return aggrString
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}
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func (node *VectorArithExpr) String() string {
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return fmt.Sprintf("(%s %s %s)", node.lhs, node.opType, node.rhs)
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}
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func (node *MatrixSelector) String() string {
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vectorString := (&VectorSelector{labelMatchers: node.labelMatchers}).String()
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intervalString := fmt.Sprintf("[%s]", utility.DurationToString(node.interval))
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return vectorString + intervalString
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}
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func (node *StringLiteral) String() string {
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return fmt.Sprintf("%q", node.str)
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}
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func (node *StringFunctionCall) String() string {
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return fmt.Sprintf("%s(%s)", node.function.name, node.args)
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}
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