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migration.go
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migration.go
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package dbservices
import (
"fmt"
"github.com/jinzhu/gorm"
"github.com/orange-cloudfoundry/logs-service-broker/model"
"gopkg.in/gormigrate.v1"
)
var labelsMigrated = false
type Migration struct {
ID string
Migrate func(db *gorm.DB, config *model.Config) error
Rollback func(db *gorm.DB, config *model.Config) error
}
type Migrations struct {
Config *model.Config
Migrations []*Migration
}
func (m Migrations) ToGormMigrate() []*gormigrate.Migration {
finalMigrations := make([]*gormigrate.Migration, 0)
for _, migration := range m.Migrations {
finalMigrations = append(finalMigrations, &gormigrate.Migration{
ID: migration.ID,
Migrate: func(db *gorm.DB) error {
return migration.Migrate(db, m.Config)
},
Rollback: func(db *gorm.DB) error {
return migration.Rollback(db, m.Config)
},
})
}
return finalMigrations
}
func GormMigration() []*Migration {
return []*Migration{
{
ID: "init",
Migrate: func(db *gorm.DB, config *model.Config) error {
fmt.Println("toto")
err := db.AutoMigrate(&model.SourceLabel{}).Error
if err != nil {
return err
}
err = migrateLabels(db, config)
if err != nil {
return err
}
labelsMigrated = true
err = db.AutoMigrate(&model.LogMetadata{}, &model.InstanceParam{}, &model.Patterns{}, &model.Label{}).Error
if err != nil {
return err
}
return nil
},
Rollback: func(db *gorm.DB, config *model.Config) error {
return nil
},
},
{
ID: "migrate-labels",
Migrate: migrateLabels,
Rollback: func(db *gorm.DB, config *model.Config) error {
return nil
},
},
{
ID: "set-revision",
Migrate: func(db *gorm.DB, config *model.Config) error {
var instanceParams []model.InstanceParam
db.Where("revision IS NULL").Find(&instanceParams)
for _, instanceParam := range instanceParams {
db.Table("instance_params").
Where("instance_id = ?", instanceParam.InstanceID).
Update("revision", 0)
}
return nil
},
Rollback: func(db *gorm.DB, config *model.Config) error {
return nil
},
},
{
ID: "migrate-pm-instance",
Migrate: func(db *gorm.DB, config *model.Config) error {
return db.Exec("ALTER TABLE instance_params DROP PRIMARY KEY, ADD PRIMARY KEY(instance_id, revision)").Error
},
Rollback: func(db *gorm.DB, config *model.Config) error {
return nil
},
},
{
ID: "add-usetls-and-draintype",
Migrate: func(db *gorm.DB, config *model.Config) error {
err := db.AutoMigrate(&model.InstanceParam{}).Error
if err != nil {
return err
}
ists := make([]model.InstanceParam, 0)
db.Find(&ists)
for _, ist := range ists {
db.Table("instance_params").
Where("instance_id = ? and revision = ?", ist.InstanceID, ist.Revision).
Updates(map[string]interface{}{"use_tls": true, "drain_type": ""})
}
return nil
},
Rollback: func(db *gorm.DB, config *model.Config) error {
return nil
},
},
}
}
func migrateLabels(db *gorm.DB, config *model.Config) error {
if !db.HasTable(&model.Label{}) || labelsMigrated {
return nil
}
var labels []struct {
BindingID string
ID string
}
db.Table("labels").Where("binding_id IS NOT NULL AND binding_id != '' ").Find(&labels)
if len(labels) == 0 {
return nil
}
bindMap := make(map[string][]string)
for _, label := range labels {
if v, ok := bindMap[label.BindingID]; ok {
v = append(v, label.ID)
bindMap[label.BindingID] = v
continue
}
bindMap[label.BindingID] = []string{label.ID}
}
for bindingId, labelIds := range bindMap {
var logMeta model.LogMetadata
db.First(&logMeta, "binding_id = ?", bindingId)
if logMeta.BindingID == "" || logMeta.InstanceID == "" {
continue
}
for _, labelId := range labelIds {
db.Model(&model.Label{}).Where("id = ?", labelId).Update("instance_id", logMeta.InstanceID)
}
}
db.Model(&model.Label{}).DropColumn("binding_id")
db.Model(&model.Pattern{}).DropColumn("binding_id")
db.Delete(&model.Label{}, "instance_id IS NULL or instance_id = ''")
db.Delete(&model.Pattern{}, "instance_id IS NULL or instance_id = ''")
return nil
}