mirror of
https://github.com/prometheus/alertmanager
synced 2024-12-24 15:12:37 +00:00
88 lines
1.8 KiB
Go
88 lines
1.8 KiB
Go
// 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 manager
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import (
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"fmt"
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"hash/fnv"
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"regexp"
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)
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type Filters []*Filter
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type Filter struct {
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Name *regexp.Regexp
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Value *regexp.Regexp
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NamePattern string
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ValuePattern string
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fingerprint uint64
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}
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func NewFilter(namePattern string, valuePattern string) *Filter {
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summer := fnv.New64a()
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fmt.Fprintf(summer, namePattern, valuePattern)
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return &Filter{
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Name: regexp.MustCompile("^" + namePattern + "$"),
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Value: regexp.MustCompile("^" + valuePattern + "$"),
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NamePattern: namePattern,
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ValuePattern: valuePattern,
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fingerprint: summer.Sum64(),
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}
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}
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func (f *Filter) Handles(l AlertLabelSet) bool {
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for k, v := range l {
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if f.Name.MatchString(k) && f.Value.MatchString(v) {
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return true
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}
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}
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return false
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}
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func (f Filters) Handles(l AlertLabelSet) bool {
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fCount := len(f)
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fMatch := 0
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for _, filter := range f {
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if filter.Handles(l) {
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fMatch++
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}
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}
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return fCount == fMatch
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}
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func (f Filters) Filter(l AlertLabelSets) AlertLabelSets {
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out := AlertLabelSets{}
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for _, labels := range l {
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if f.Handles(labels) {
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out = append(out, labels)
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}
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}
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return out
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}
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func (f Filters) fingerprint() uint64 {
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summer := fnv.New64a()
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for i, f := range f {
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fmt.Fprintln(summer, i, f.fingerprint)
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}
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return summer.Sum64()
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}
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