mirror of
https://github.com/prometheus/alertmanager
synced 2024-12-12 17:36:34 +00:00
538305bec9
Sync Makefile.common to latest which updates promu version and adds license check to default target. Add missing license headers. Signed-off-by: Paul Gier <pgier@redhat.com>
146 lines
3.1 KiB
Go
146 lines
3.1 KiB
Go
// Copyright 2018 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 store
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/prometheus/alertmanager/types"
|
|
"github.com/prometheus/common/model"
|
|
)
|
|
|
|
var (
|
|
// ErrNotFound is returned if a Store cannot find the Alert.
|
|
ErrNotFound = errors.New("alert not found")
|
|
)
|
|
|
|
// Alerts provides lock-coordinated to an in-memory map of alerts, keyed by
|
|
// their fingerprint. Resolved alerts are removed from the map based on
|
|
// gcInterval. An optional callback can be set which receives a slice of all
|
|
// resolved alerts that have been removed.
|
|
type Alerts struct {
|
|
gcInterval time.Duration
|
|
|
|
sync.Mutex
|
|
c map[model.Fingerprint]*types.Alert
|
|
cb func([]*types.Alert)
|
|
}
|
|
|
|
// NewAlerts returns a new Alerts struct.
|
|
func NewAlerts(gcInterval time.Duration) *Alerts {
|
|
if gcInterval == 0 {
|
|
gcInterval = time.Minute
|
|
}
|
|
|
|
a := &Alerts{
|
|
c: make(map[model.Fingerprint]*types.Alert),
|
|
cb: func(_ []*types.Alert) {},
|
|
gcInterval: gcInterval,
|
|
}
|
|
|
|
return a
|
|
}
|
|
|
|
// SetGCCallback sets a GC callback to be executed after each GC.
|
|
func (a *Alerts) SetGCCallback(cb func([]*types.Alert)) {
|
|
a.Lock()
|
|
defer a.Unlock()
|
|
|
|
a.cb = cb
|
|
}
|
|
|
|
// Run starts the GC loop.
|
|
func (a *Alerts) Run(ctx context.Context) {
|
|
go func(t *time.Ticker) {
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case <-t.C:
|
|
a.gc()
|
|
}
|
|
}
|
|
}(time.NewTicker(a.gcInterval))
|
|
}
|
|
|
|
func (a *Alerts) gc() {
|
|
a.Lock()
|
|
defer a.Unlock()
|
|
|
|
resolved := []*types.Alert{}
|
|
for fp, alert := range a.c {
|
|
if alert.Resolved() {
|
|
delete(a.c, fp)
|
|
resolved = append(resolved, alert)
|
|
}
|
|
}
|
|
a.cb(resolved)
|
|
}
|
|
|
|
// Get returns the Alert with the matching fingerprint, or an error if it is
|
|
// not found.
|
|
func (a *Alerts) Get(fp model.Fingerprint) (*types.Alert, error) {
|
|
a.Lock()
|
|
defer a.Unlock()
|
|
|
|
alert, prs := a.c[fp]
|
|
if !prs {
|
|
return nil, ErrNotFound
|
|
}
|
|
return alert, nil
|
|
}
|
|
|
|
// Set unconditionally sets the alert in memory.
|
|
func (a *Alerts) Set(alert *types.Alert) error {
|
|
a.Lock()
|
|
defer a.Unlock()
|
|
|
|
a.c[alert.Fingerprint()] = alert
|
|
return nil
|
|
}
|
|
|
|
// Delete removes the Alert with the matching fingerprint from the store.
|
|
func (a *Alerts) Delete(fp model.Fingerprint) error {
|
|
a.Lock()
|
|
defer a.Unlock()
|
|
|
|
delete(a.c, fp)
|
|
return nil
|
|
}
|
|
|
|
// List returns a buffered channel of Alerts currently held in memory.
|
|
func (a *Alerts) List() <-chan *types.Alert {
|
|
a.Lock()
|
|
defer a.Unlock()
|
|
|
|
c := make(chan *types.Alert, len(a.c))
|
|
for _, alert := range a.c {
|
|
c <- alert
|
|
}
|
|
close(c)
|
|
|
|
return c
|
|
}
|
|
|
|
// Count returns the number of items within the store.
|
|
func (a *Alerts) Count() int {
|
|
a.Lock()
|
|
defer a.Unlock()
|
|
|
|
return len(a.c)
|
|
}
|