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package escalationmanager
import (
"context"
"database/sql"
"github.com/target/goalert/alert/alertlog"
"github.com/target/goalert/engine/processinglock"
"github.com/target/goalert/util"
)
// DB handles updating escalation policies.
type DB struct {
lock *processinglock.Lock
clearMaintExpiredSvc *sql.Stmt
cleanupNoSteps *sql.Stmt
lockStmt *sql.Stmt
updateOnCall *sql.Stmt
newPolicies *sql.Stmt
deletedSteps *sql.Stmt
normalEscalation *sql.Stmt
log *alertlog.Store
}
// Name returns the name of the module.
func (db *DB) Name() string { return "Engine.EscalationManager" }
// NewDB creates a new DB.
func NewDB(ctx context.Context, db *sql.DB, log *alertlog.Store) (*DB, error) {
lock, err := processinglock.NewLock(ctx, db, processinglock.Config{
Version: 4,
Type: processinglock.TypeEscalation,
})
if err != nil {
return nil, err
}
p := &util.Prepare{Ctx: ctx, DB: db}
return &DB{
log: log,
lock: lock,
lockStmt: p.P(`lock escalation_policy_steps in share mode`),
updateOnCall: p.P(`
with on_call as (
select
step.id step_id,
coalesce(act.user_id, part.user_id, sched.user_id) user_id
from escalation_policy_steps step
join escalation_policy_actions act on act.escalation_policy_step_id = step.id
left join rotation_state rState on rState.rotation_id = act.rotation_id
left join rotation_participants part on part.id = rState.rotation_participant_id
left join schedule_on_call_users sched on sched.schedule_id = act.schedule_id and sched.end_time isnull
where coalesce(act.user_id, part.user_id, sched.user_id) notnull
), ended as (
select
ep_step_id step_id,
user_id
from ep_step_on_call_users
where end_time isnull
except
select step_id, user_id
from on_call
), _end as (
update ep_step_on_call_users ep
set end_time = now()
from ended
where
ep.ep_step_id = ended.step_id and
ep.user_id = ended.user_id and
ep.end_time isnull
)
insert into ep_step_on_call_users (ep_step_id, user_id)
select step_id, user_id
from on_call
on conflict do nothing
returning ep_step_id, user_id
`),
clearMaintExpiredSvc: p.P(`
update services s
set maintenance_expires_at = null
where s.maintenance_expires_at <= now()
`),
cleanupNoSteps: p.P(`
delete from escalation_policy_state state
using escalation_policies pol
where
state.escalation_policy_step_id isnull and
pol.id = state.escalation_policy_id and
pol.step_count = 0
`),
newPolicies: p.P(`
with to_escalate as (
select alert_id, step.id ep_step_id, step.delay, step.escalation_policy_id, a.service_id
from escalation_policy_state state
join escalation_policy_steps step on
step.escalation_policy_id = state.escalation_policy_id and
step.step_number = 0
join alerts a on a.id = state.alert_id and (a.status = 'triggered' or state.force_escalation)
join services s on a.service_id = s.id and s.maintenance_expires_at isnull
where state.last_escalation isnull
for update skip locked
limit 1000
), _step_cycles as (
select esc.alert_id, on_call.user_id, esc.ep_step_id
from to_escalate esc
join ep_step_on_call_users on_call on
on_call.end_time isnull and
on_call.ep_step_id = esc.ep_step_id
), _cycles as (
insert into notification_policy_cycles (alert_id, user_id)
select alert_id, user_id from _step_cycles
), _step_channels as (
select
cast('alert_notification' as enum_outgoing_messages_type),
esc.alert_id,
esc.service_id,
esc.escalation_policy_id,
act.channel_id,
esc.ep_step_id
from to_escalate esc
join escalation_policy_actions act on
act.channel_id notnull and
act.escalation_policy_step_id = esc.ep_step_id
), _channels as (
insert into outgoing_messages (message_type, alert_id, service_id, escalation_policy_id, channel_id)
select
cast('alert_notification' as enum_outgoing_messages_type),
alert_id,
service_id,
escalation_policy_id,
channel_id
from _step_channels
), _update as (
update escalation_policy_state state
set
last_escalation = now(),
next_escalation = now() + (cast(esc.delay as text)||' minutes')::interval,
escalation_policy_step_id = esc.ep_step_id,
force_escalation = false
from
to_escalate esc
where
state.alert_id = esc.alert_id
)
select distinct esc.alert_id, step isnull and chan isnull
from to_escalate esc
left join _step_cycles step on step.alert_id = esc.alert_id
left join _step_channels chan on chan.alert_id = esc.alert_id
`),
deletedSteps: p.P(`
with to_escalate as (
select
alert_id,
step.id ep_step_id,
step.step_number,
step.delay,
state.escalation_policy_step_number >= ep.step_count repeated,
a.service_id,
step.escalation_policy_id
from escalation_policy_state state
join alerts a on a.id = state.alert_id and (a.status = 'triggered' or state.force_escalation)
join escalation_policies ep on ep.id = state.escalation_policy_id
join escalation_policy_steps step on
step.escalation_policy_id = state.escalation_policy_id and
step.step_number = CASE
WHEN state.escalation_policy_step_number >= ep.step_count THEN 0
ELSE state.escalation_policy_step_number
END
join services s on a.service_id = s.id and s.maintenance_expires_at isnull
where
state.last_escalation notnull and
escalation_policy_step_id isnull
for update skip locked
limit 100
), _step_cycles as (
select esc.alert_id, on_call.user_id, esc.ep_step_id
from to_escalate esc
join ep_step_on_call_users on_call on
on_call.end_time isnull and
on_call.ep_step_id = esc.ep_step_id
), _cycles as (
insert into notification_policy_cycles (alert_id, user_id)
select alert_id, user_id
from _step_cycles
), _step_channels as (
select
cast('alert_notification' as enum_outgoing_messages_type),
esc.alert_id,
esc.service_id,
esc.escalation_policy_id,
act.channel_id,
esc.ep_step_id
from to_escalate esc
join escalation_policy_actions act on
act.channel_id notnull and
act.escalation_policy_step_id = esc.ep_step_id
), _channels as (
insert into outgoing_messages (message_type, alert_id, service_id, escalation_policy_id, channel_id)
select
cast('alert_notification' as enum_outgoing_messages_type),
alert_id,
service_id,
escalation_policy_id,
channel_id
from _step_channels
), _update as (
update escalation_policy_state state
set
last_escalation = now(),
next_escalation = now() + (cast(esc.delay as text)||' minutes')::interval,
escalation_policy_step_number = esc.step_number,
escalation_policy_step_id = esc.ep_step_id,
force_escalation = false
from
to_escalate esc
where
state.alert_id = esc.alert_id
)
select distinct esc.alert_id, esc.repeated, esc.step_number, step isnull and chan isnull
from to_escalate esc
left join _step_cycles step on step.alert_id = esc.alert_id
left join _step_channels chan on chan.alert_id = esc.alert_id
`),
normalEscalation: p.P(`
with to_escalate as (
select
alert_id,
nextStep.id ep_step_id,
nextStep.delay,
nextStep.step_number,
force_escalation forced,
oldStep.delay old_delay,
oldStep.step_number + 1 >= ep.step_count repeated,
nextStep.escalation_policy_id,
a.service_id
from escalation_policy_state state
join alerts a on a.id = state.alert_id and (a.status = 'triggered' or state.force_escalation)
join escalation_policies ep on ep.id = state.escalation_policy_id
join escalation_policy_steps oldStep on oldStep.id = escalation_policy_step_id
join escalation_policy_steps nextStep on
nextStep.escalation_policy_id = state.escalation_policy_id and
nextStep.step_number = CASE
WHEN oldStep.step_number + 1 < ep.step_count THEN
oldStep.step_number + 1
WHEN force_escalation OR ep.repeat = -1 THEN 0
WHEN state.loop_count < ep.repeat THEN 0
ELSE -1
END
join services s on a.service_id = s.id and s.maintenance_expires_at isnull
where
state.last_escalation notnull and
escalation_policy_step_id notnull and
(next_escalation < now() or force_escalation)
order by next_escalation - now()
for update skip locked
limit 500
), _step_cycles as (
select esc.alert_id, on_call.user_id, esc.ep_step_id
from to_escalate esc
join ep_step_on_call_users on_call on
on_call.end_time isnull and
on_call.ep_step_id = esc.ep_step_id
), _cycles as (
insert into notification_policy_cycles (alert_id, user_id)
select alert_id, user_id
from _step_cycles
), _step_channels as (
select
cast('alert_notification' as enum_outgoing_messages_type),
esc.alert_id,
esc.service_id,
esc.escalation_policy_id,
act.channel_id,
esc.ep_step_id
from to_escalate esc
join escalation_policy_actions act on
act.channel_id notnull and
act.escalation_policy_step_id = esc.ep_step_id
), _channels as (
insert into outgoing_messages (message_type, alert_id, service_id, escalation_policy_id, channel_id)
select
cast('alert_notification' as enum_outgoing_messages_type),
alert_id,
service_id,
escalation_policy_id,
channel_id
from _step_channels
), _update as (
update escalation_policy_state state
set
last_escalation = now(),
next_escalation = now() + (cast(esc.delay as text)||' minutes')::interval,
escalation_policy_step_number = esc.step_number,
escalation_policy_step_id = esc.ep_step_id,
loop_count = CASE WHEN esc.repeated THEN loop_count + 1 ELSE loop_count END,
force_escalation = false
from
to_escalate esc
where
state.alert_id = esc.alert_id
)
select distinct esc.alert_id, esc.repeated, esc.step_number, esc.old_delay, esc.forced, step isnull and chan isnull
from to_escalate esc
left join _step_cycles step on step.alert_id = esc.alert_id
left join _step_channels chan on chan.alert_id = esc.alert_id
`),
}, p.Err
}
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