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checkin.go
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/
checkin.go
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// Statup
// Copyright (C) 2018. Hunter Long and the project contributors
// Written by Hunter Long <info@socialeck.com> and the project contributors
//
// https://github.com/hunterlong/statup
//
// The licenses for most software and other practical works are designed
// to take away your freedom to share and change the works. By contrast,
// the GNU General Public License is intended to guarantee your freedom to
// share and change all versions of a program--to make sure it remains free
// software for all its users.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package core
import (
"fmt"
"github.com/ararog/timeago"
"github.com/hunterlong/statup/types"
"github.com/hunterlong/statup/utils"
"time"
)
type Checkin struct {
*types.Checkin
}
type CheckinHit struct {
*types.CheckinHit
}
// Routine for checking if the last Checkin was within its interval
func (c *Checkin) Routine() {
if c.Last() == nil {
return
}
reCheck := c.Period()
CheckinLoop:
for {
select {
case <-c.Running:
utils.Log(1, fmt.Sprintf("Stopping checkin routine: %v", c.Name))
break CheckinLoop
case <-time.After(reCheck):
utils.Log(1, fmt.Sprintf("Checkin %v is expected at %v, checking every %v", c.Name, utils.FormatDuration(c.Expected()), utils.FormatDuration(c.Period())))
if c.Expected().Seconds() <= 0 {
issue := fmt.Sprintf("Checkin %v is failing, no request since %v", c.Name, c.Last().CreatedAt)
utils.Log(3, issue)
c.Service()
c.CreateFailure()
}
reCheck = c.Period()
}
continue
}
}
// String will return a Checkin API string
func (c *Checkin) String() string {
return c.ApiKey
}
// ReturnCheckin converts *types.Checking to *core.Checkin
func ReturnCheckin(c *types.Checkin) *Checkin {
return &Checkin{Checkin: c}
}
// ReturnCheckinHit converts *types.checkinHit to *core.checkinHit
func ReturnCheckinHit(c *types.CheckinHit) *CheckinHit {
return &CheckinHit{CheckinHit: c}
}
func (c *Checkin) Service() *Service {
service := SelectService(c.ServiceId)
return service
}
func (c *Checkin) CreateFailure() (int64, error) {
service := c.Service()
fail := &types.Failure{
Issue: fmt.Sprintf("Checkin %v was not reported %v ago, it expects a request every %v", c.Name, utils.FormatDuration(c.Expected()), utils.FormatDuration(c.Period())),
Method: "checkin",
MethodId: c.Id,
Service: service.Id,
PingTime: c.Expected().Seconds() * 0.001,
}
row := failuresDB().Create(&fail)
return fail.Id, row.Error
}
// AllCheckins returns all checkin in system
func AllCheckins() []*Checkin {
var checkins []*Checkin
checkinDB().Find(&checkins)
return checkins
}
// SelectCheckin will find a Checkin based on the API supplied
func SelectCheckin(api string) *Checkin {
var checkin Checkin
checkinDB().Where("api_key = ?", api).First(&checkin)
return &checkin
}
// SelectCheckin will find a Checkin based on the API supplied
func SelectCheckinId(id int64) *Checkin {
var checkin Checkin
checkinDB().Where("id = ?", id).First(&checkin)
return &checkin
}
// Period will return the duration of the Checkin interval
func (c *Checkin) Period() time.Duration {
duration, _ := time.ParseDuration(fmt.Sprintf("%vs", c.Interval))
return duration
}
// Grace will return the duration of the Checkin Grace Period (after service hasn't responded, wait a bit for a response)
func (c *Checkin) Grace() time.Duration {
duration, _ := time.ParseDuration(fmt.Sprintf("%vs", c.GracePeriod))
return duration
}
// Expected returns the duration of when the serviec should receive a Checkin
func (c *Checkin) Expected() time.Duration {
last := c.Last().CreatedAt
now := time.Now()
lastDir := now.Sub(last)
sub := time.Duration(c.Period() - lastDir)
return sub
}
// Last returns the last checkinHit for a Checkin
func (c *Checkin) Last() *CheckinHit {
var hit CheckinHit
checkinHitsDB().Where("checkin = ?", c.Id).Last(&hit)
return &hit
}
func (c *Checkin) Link() string {
return fmt.Sprintf("%v/checkin/%v", CoreApp.Domain, c.ApiKey)
}
// AllHits returns all of the CheckinHits for a given Checkin
func (c *Checkin) AllHits() []*types.CheckinHit {
var checkins []*types.CheckinHit
checkinHitsDB().Where("checkin = ?", c.Id).Order("id DESC").Find(&checkins)
return checkins
}
// Hits returns all of the CheckinHits for a given Checkin
func (c *Checkin) AllFailures() []*types.Failure {
var failures []*types.Failure
col := failuresDB().Where("checkin = ?", c.Id).Where("method = 'checkin'").Order("id desc")
col.Find(&failures)
return failures
}
// Create will create a new Checkin
func (c *Checkin) Delete() error {
c.Close()
row := checkinDB().Delete(&c)
return row.Error
}
// Create will create a new Checkin
func (c *Checkin) Create() (int64, error) {
c.ApiKey = utils.RandomString(7)
row := checkinDB().Create(&c)
c.Start()
go c.Routine()
if row.Error != nil {
utils.Log(2, row.Error)
return 0, row.Error
}
return c.Id, row.Error
}
// Update will update a Checkin
func (c *Checkin) Update() (int64, error) {
row := checkinDB().Update(&c)
if row.Error != nil {
utils.Log(2, row.Error)
return 0, row.Error
}
return c.Id, row.Error
}
// Create will create a new successful checkinHit
func (c *CheckinHit) Create() (int64, error) {
if c.CreatedAt.IsZero() {
c.CreatedAt = time.Now()
}
row := checkinHitsDB().Create(&c)
if row.Error != nil {
utils.Log(2, row.Error)
return 0, row.Error
}
return c.Id, row.Error
}
// Ago returns the duration of time between now and the last successful checkinHit
func (c *CheckinHit) Ago() string {
got, _ := timeago.TimeAgoWithTime(time.Now(), c.CreatedAt)
return got
}
// RecheckCheckinFailure will check if a Service Checkin has been reported yet
func (c *Checkin) RecheckCheckinFailure(guard chan struct{}) {
between := time.Now().Sub(time.Now()).Seconds()
if between > float64(c.Interval) {
fmt.Println("rechecking every 15 seconds!")
time.Sleep(15 * time.Second)
guard <- struct{}{}
c.RecheckCheckinFailure(guard)
} else {
fmt.Println("i recovered!!")
}
<-guard
}