mirror of
https://github.com/prometheus/statsd_exporter.git
synced 2024-11-26 09:11:01 +00:00
48 lines
1.7 KiB
Go
48 lines
1.7 KiB
Go
// Copyright 2018 The Prometheus Authors
|
|
// 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 fsm
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
)
|
|
|
|
// DumpFSM accepts a io.writer and write the current FSM into dot file format.
|
|
func (f *FSM) DumpFSM(w io.Writer) {
|
|
idx := 0
|
|
states := make(map[int]*mappingState)
|
|
states[idx] = f.root
|
|
|
|
w.Write([]byte("digraph g {\n"))
|
|
w.Write([]byte("rankdir=LR\n")) // make it vertical
|
|
w.Write([]byte("node [ label=\"\",style=filled,fillcolor=white,shape=circle ]\n")) // remove label of node
|
|
|
|
for idx < len(states) {
|
|
for field, transition := range states[idx].transitions {
|
|
states[len(states)] = transition
|
|
w.Write([]byte(fmt.Sprintf("%d -> %d [label = \"%s\"];\n", idx, len(states)-1, field)))
|
|
if idx == 0 {
|
|
// color for metric types
|
|
w.Write([]byte(fmt.Sprintf("%d [color=\"#D6B656\",fillcolor=\"#FFF2CC\"];\n", len(states)-1)))
|
|
} else if transition.transitions == nil || len(transition.transitions) == 0 {
|
|
// color for end state
|
|
w.Write([]byte(fmt.Sprintf("%d [color=\"#82B366\",fillcolor=\"#D5E8D4\"];\n", len(states)-1)))
|
|
}
|
|
}
|
|
idx++
|
|
}
|
|
// color for start state
|
|
w.Write([]byte(fmt.Sprintf("0 [color=\"#a94442\",fillcolor=\"#f2dede\"];\n")))
|
|
w.Write([]byte("}"))
|
|
}
|