Source: silence.go in package github.com/prometheus/common/model

Copyright 2015 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 model

import (
	"encoding/json"
	"fmt"
	"regexp"
	"time"
)

Matcher describes a matches the value of a given label.

type Matcher struct {
	Name    LabelName `json:"name"`
	Value   string    `json:"value"`
	IsRegex bool      `json:"isRegex"`
}

func (m *Matcher) UnmarshalJSON(b []byte) error {
	type plain Matcher
	if err := json.Unmarshal(b, (*plain)(m)); err != nil {
		return err
	}

	if len(m.Name) == 0 {
		return fmt.Errorf("label name in matcher must not be empty")
	}
	if m.IsRegex {
		if _, err := regexp.Compile(m.Value); err != nil {
			return err
		}
	}
	return nil
}

Validate returns true iff all fields of the matcher have valid values.

func (m *Matcher) Validate() error {
	if !m.Name.IsValid() {
		return fmt.Errorf("invalid name %q", m.Name)
	}
	if m.IsRegex {
		if _, err := regexp.Compile(m.Value); err != nil {
			return fmt.Errorf("invalid regular expression %q", m.Value)
		}
	} else if !LabelValue(m.Value).IsValid() || len(m.Value) == 0 {
		return fmt.Errorf("invalid value %q", m.Value)
	}
	return nil
}

Silence defines the representation of a silence definition in the Prometheus eco-system.

type Silence struct {
	ID uint64 `json:"id,omitempty"`

	Matchers []*Matcher `json:"matchers"`

	StartsAt time.Time `json:"startsAt"`
	EndsAt   time.Time `json:"endsAt"`

	CreatedAt time.Time `json:"createdAt,omitempty"`
	CreatedBy string    `json:"createdBy"`
	Comment   string    `json:"comment,omitempty"`
}

Validate returns true iff all fields of the silence have valid values.

func (s *Silence) Validate() error {
	if len(s.Matchers) == 0 {
		return fmt.Errorf("at least one matcher required")
	}
	for _, m := range s.Matchers {
		if err := m.Validate(); err != nil {
			return fmt.Errorf("invalid matcher: %s", err)
		}
	}
	if s.StartsAt.IsZero() {
		return fmt.Errorf("start time missing")
	}
	if s.EndsAt.IsZero() {
		return fmt.Errorf("end time missing")
	}
	if s.EndsAt.Before(s.StartsAt) {
		return fmt.Errorf("start time must be before end time")
	}
	if s.CreatedBy == "" {
		return fmt.Errorf("creator information missing")
	}
	if s.Comment == "" {
		return fmt.Errorf("comment missing")
	}
	if s.CreatedAt.IsZero() {
		return fmt.Errorf("creation timestamp missing")
	}
	return nil