MM-9728: Online migration for advanced permissions phase 2 (#8744)

* MM-9728: Online migration for advanced permissions phase 2

* Add unit tests for new store functions.

* Move migration specific code to own file.

* Add migration state function test.

* Style fixes.

* Add i18n strings.

* Fix mocks.

* Add TestMain to migrations package tests.

* Fix typo.

* Fix review comments.

* Fix up the "Check if migration is done" check to actually work.

6 files changed, 44 insertions, 0 deletions

diff --git a/jobs/interfaces/migrations_interface.go b/jobs/interfaces/migrations_interface.go
new file mode 100644
index 000000000..48dc9f579
--- /dev/null
+++ b/jobs/interfaces/migrations_interface.go
@@ -0,0 +1,11 @@
+// Copyright (c) 2018-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package interfaces
+
+import "github.com/mattermost/mattermost-server/model"
+
+type MigrationsJobInterface interface {
+	MakeWorker() model.Worker
+	MakeScheduler() model.Scheduler
+}
diff --git a/jobs/jobs.go b/jobs/jobs.go
index 850491403..ddbc4489b 100644
--- a/jobs/jobs.go
+++ b/jobs/jobs.go
@@ -106,6 +106,13 @@ func (srv *JobServer) SetJobCanceled(job *model.Job) *model.AppError {
 	return result.Err
 }
 
+func (srv *JobServer) UpdateInProgressJobData(job *model.Job) *model.AppError {
+	job.Status = model.JOB_STATUS_IN_PROGRESS
+	job.LastActivityAt = model.GetMillis()
+	result := <-srv.Store.Job().UpdateOptimistically(job, model.JOB_STATUS_IN_PROGRESS)
+	return result.Err
+}
+
 func (srv *JobServer) RequestCancellation(jobId string) *model.AppError {
 	if result := <-srv.Store.Job().UpdateStatusOptimistically(jobId, model.JOB_STATUS_PENDING, model.JOB_STATUS_CANCELED); result.Err != nil {
 		return result.Err
diff --git a/jobs/jobs_watcher.go b/jobs/jobs_watcher.go
index 07979442d..01d0a8d0f 100644
--- a/jobs/jobs_watcher.go
+++ b/jobs/jobs_watcher.go
@@ -107,6 +107,13 @@ func (watcher *Watcher) PollAndNotify() {
 					default:
 					}
 				}
+			} else if job.Type == model.JOB_TYPE_MIGRATIONS {
+				if watcher.workers.Migrations != nil {
+					select {
+					case watcher.workers.Migrations.JobChannel() <- *job:
+					default:
+					}
+				}
 			}
 		}
 	}
diff --git a/jobs/schedulers.go b/jobs/schedulers.go
index 2823036df..96aa2b635 100644
--- a/jobs/schedulers.go
+++ b/jobs/schedulers.go
@@ -50,6 +50,10 @@ func (srv *JobServer) InitSchedulers() *Schedulers {
 		schedulers.schedulers = append(schedulers.schedulers, ldapSyncInterface.MakeScheduler())
 	}
 
+	if migrationsInterface := srv.Migrations; migrationsInterface != nil {
+		schedulers.schedulers = append(schedulers.schedulers, migrationsInterface.MakeScheduler())
+	}
+
 	schedulers.nextRunTimes = make([]*time.Time, len(schedulers.schedulers))
 	return schedulers
 }
diff --git a/jobs/server.go b/jobs/server.go
index 01cf821dc..10ea9a46f 100644
--- a/jobs/server.go
+++ b/jobs/server.go
@@ -5,6 +5,7 @@ package jobs
 
 import (
 	ejobs "github.com/mattermost/mattermost-server/einterfaces/jobs"
+	tjobs "github.com/mattermost/mattermost-server/jobs/interfaces"
 	"github.com/mattermost/mattermost-server/model"
 	"github.com/mattermost/mattermost-server/store"
 )
@@ -34,6 +35,7 @@ type JobServer struct {
 	ElasticsearchAggregator ejobs.ElasticsearchAggregatorInterface
 	ElasticsearchIndexer    ejobs.ElasticsearchIndexerInterface
 	LdapSync                ejobs.LdapSyncInterface
+	Migrations              tjobs.MigrationsJobInterface
 }
 
 func NewJobServer(configService ConfigService, store store.Store) *JobServer {
diff --git a/jobs/workers.go b/jobs/workers.go
index 57a255013..67ab43241 100644
--- a/jobs/workers.go
+++ b/jobs/workers.go
@@ -20,6 +20,7 @@ type Workers struct {
 	ElasticsearchIndexing    model.Worker
 	ElasticsearchAggregation model.Worker
 	LdapSync                 model.Worker
+	Migrations               model.Worker
 
 	listenerId string
 }
@@ -50,6 +51,10 @@ func (srv *JobServer) InitWorkers() *Workers {
 		workers.LdapSync = ldapSyncInterface.MakeWorker()
 	}
 
+	if migrationsInterface := srv.Migrations; migrationsInterface != nil {
+		workers.Migrations = migrationsInterface.MakeWorker()
+	}
+
 	return workers
 }
 
@@ -77,6 +82,10 @@ func (workers *Workers) Start() *Workers {
 			go workers.LdapSync.Run()
 		}
 
+		if workers.Migrations != nil {
+			go workers.Migrations.Run()
+		}
+
 		go workers.Watcher.Start()
 	})
 
@@ -152,6 +161,10 @@ func (workers *Workers) Stop() *Workers {
 		workers.LdapSync.Stop()
 	}
 
+	if workers.Migrations != nil {
+		workers.Migrations.Stop()
+	}
+
 	mlog.Info("Stopped workers")
 
 	return workers