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cron.go
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cron.go
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package campaigns
import (
"context"
"fmt"
"time"
"github.com/gomodule/redigo/redis"
"github.com/jmoiron/sqlx"
"github.com/nyaruka/goflow/assets"
"github.com/nyaruka/librato"
"github.com/nyaruka/mailroom"
"github.com/nyaruka/mailroom/cron"
"github.com/nyaruka/mailroom/marker"
"github.com/nyaruka/mailroom/models"
"github.com/nyaruka/mailroom/queue"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
const (
campaignsLock = "campaign_event"
maxBatchSize = 100
)
func init() {
mailroom.AddInitFunction(StartCampaignCron)
}
// StartCampaignCron starts our cron job of firing expired campaign events
func StartCampaignCron(mr *mailroom.Mailroom) error {
cron.StartCron(mr.Quit, mr.RP, campaignsLock, time.Second*60,
func(lockName string, lockValue string) error {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute*5)
defer cancel()
return fireCampaignEvents(ctx, mr.DB, mr.RP, lockName, lockValue)
},
)
return nil
}
// fireCampaignEvents looks for all expired campaign event fires and queues them to be started
func fireCampaignEvents(ctx context.Context, db *sqlx.DB, rp *redis.Pool, lockName string, lockValue string) error {
log := logrus.WithField("comp", "campaign_events").WithField("lock", lockValue)
start := time.Now()
// find all events that need to be fired
ctx, cancel := context.WithTimeout(ctx, time.Minute*5)
defer cancel()
rows, err := db.QueryxContext(ctx, expiredEventsQuery)
if err != nil {
return errors.Wrapf(err, "error loading expired campaign events")
}
defer rows.Close()
rc := rp.Get()
defer rc.Close()
queued := 0
queueTask := func(task *eventFireTask) error {
if task.EventID == 0 {
return nil
}
fireIDs := task.FireIDs
for len(fireIDs) > 0 {
batchSize := maxBatchSize
if batchSize > len(fireIDs) {
batchSize = len(fireIDs)
}
task.FireIDs = fireIDs[:batchSize]
fireIDs = fireIDs[batchSize:]
err = queue.AddTask(rc, mailroom.BatchQueue, mailroom.FireCampaignEventType, int(task.OrgID), task, queue.DefaultPriority)
if err != nil {
return errors.Wrap(err, "error queuing task")
}
// mark each of these fires as queued
for _, id := range task.FireIDs {
err = marker.AddTask(rc, campaignsLock, fmt.Sprintf("%d", id))
if err != nil {
return errors.Wrap(err, "error marking event as queued")
}
}
log.WithField("task", fmt.Sprintf("%vvv", task)).WithField("fire_count", len(task.FireIDs)).Debug("added event fire task")
queued += len(task.FireIDs)
}
return nil
}
// while we have rows
task := &eventFireTask{}
for rows.Next() {
row := &eventFireRow{}
err := rows.StructScan(row)
if err != nil {
return errors.Wrapf(err, "error reading event fire row")
}
// check whether this event has already been queued to fire
taskID := fmt.Sprintf("%d", row.FireID)
dupe, err := marker.HasTask(rc, campaignsLock, taskID)
if err != nil {
return errors.Wrap(err, "error checking task lock")
}
// this has already been queued, move on
if dupe {
continue
}
// if this is the same event as our current task, add it there
if row.EventID == task.EventID {
task.FireIDs = append(task.FireIDs, row.FireID)
continue
}
// different task, queue up our current task
err = queueTask(task)
if err != nil {
return errors.Wrapf(err, "error queueing task")
}
// and create a new one based on this row
task = &eventFireTask{
FireIDs: []int64{row.FireID},
EventID: row.EventID,
EventUUID: row.EventUUID,
FlowUUID: row.FlowUUID,
CampaignUUID: row.CampaignUUID,
CampaignName: row.CampaignName,
OrgID: row.OrgID,
}
}
// queue our last task
err = queueTask(task)
if err != nil {
return errors.Wrapf(err, "error queueing task")
}
librato.Gauge("mr.campaign_event_cron_elapsed", float64(time.Since(start))/float64(time.Second))
librato.Gauge("mr.campaign_event_cron_count", float64(queued))
log.WithField("elapsed", time.Since(start)).WithField("queued", queued).Info("campaign event fire queuing complete")
return nil
}
type eventFireTask struct {
FireIDs []int64 `json:"fire_ids"`
EventID int64 `json:"event_id"`
EventUUID string `json:"event_uuid"`
FlowUUID assets.FlowUUID `json:"flow_uuid"`
CampaignUUID string `json:"campaign_uuid"`
CampaignName string `json:"campaign_name"`
OrgID models.OrgID `json:"org_id"`
}
type eventFireRow struct {
FireID int64 `db:"fire_id"`
EventID int64 `db:"event_id"`
EventUUID string `db:"event_uuid"`
FlowUUID assets.FlowUUID `db:"flow_uuid"`
CampaignUUID string `db:"campaign_uuid"`
CampaignName string `db:"campaign_name"`
OrgID models.OrgID `db:"org_id"`
}
const expiredEventsQuery = `
SELECT
ef.id as fire_id,
ef.event_id as event_id,
ce.uuid as event_uuid,
f.uuid as flow_uuid,
c.uuid as campaign_uuid,
c.name as campaign_name,
f.org_id as org_id
FROM
campaigns_eventfire ef,
campaigns_campaignevent ce,
campaigns_campaign c,
flows_flow f
WHERE
ef.fired IS NULL AND ef.scheduled <= NOW() AND
ce.id = ef.event_id AND
ce.is_active = TRUE AND
f.id = ce.flow_id AND f.flow_server_enabled = TRUE AND
ce.campaign_id = c.id
ORDER BY
DATE_TRUNC('minute', scheduled) ASC,
ef.event_id ASC
LIMIT
25000;
`