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model.go
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model.go
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package sqldb
import (
"context"
"database/sql"
"time"
"github.com/grupawp/tensorflow-deploy/app"
"github.com/grupawp/tensorflow-deploy/exterr"
"github.com/grupawp/tensorflow-deploy/metadata"
)
// Model ...
type Model struct {
connection *sql.DB
}
// Get gets single model metadata
func (m *Model) Get(ctx context.Context, parameters app.QueryParameters) (*app.ModelData, error) {
model := new(app.ModelData)
var statusID uint8
query, queryValues, err := buildExtendedSearchQueryAndValues("SELECT id, team, project, name, version, label, status, created, updated FROM model", "LIMIT 1", parameters)
if err != nil {
return nil, err
}
err = m.connection.QueryRowContext(ctx, query, queryValues...).Scan(&model.ID, &model.Team, &model.Project, &model.Name, &model.Version, &model.Label, &statusID, &model.Created, &model.Updated)
if err != nil {
if err == sql.ErrNoRows {
return nil, nil
}
return nil, exterr.WrapWithFrame(err)
}
model.Status, err = metadata.StatusToName(statusID)
if err != nil {
return nil, err
}
return model, nil
}
// Add inserts model metadata
func (m *Model) Add(ctx context.Context, model app.ModelData) (int64, error) {
status, err := metadata.StatusToID(model.Status)
if err != nil {
return metadata.InvalidID, err
}
timestamp := time.Now().Unix()
result, err := m.connection.ExecContext(ctx, "INSERT INTO model (team, project, name, version, label, status, created, updated) VALUES(?, ?, ?, ?, ?, ?, ?, ?)",
model.Team,
model.Project,
model.Name,
model.Version,
model.Label,
status,
timestamp,
timestamp)
if err != nil {
return metadata.InvalidID, exterr.WrapWithFrame(err)
}
id, err := result.LastInsertId()
if err != nil {
return metadata.InvalidID, exterr.WrapWithFrame(err)
}
return id, nil
}
// UpdateStatus updates model status
func (m *Model) UpdateStatus(ctx context.Context, id int64, status string) error {
statusID, err := metadata.StatusToID(status)
if err != nil {
return err
}
result, err := m.connection.ExecContext(ctx, "UPDATE model SET status = ?, updated = ? WHERE id = ? AND status != ?",
statusID,
time.Now().Unix(),
id,
statusID)
if err != nil {
return exterr.WrapWithFrame(err)
}
affected, err := result.RowsAffected()
if err != nil {
return exterr.WrapWithFrame(err)
} else if affected == 0 {
return errorUpdateModel
}
return nil
}
// Delete deletes model metadata
func (m *Model) Delete(ctx context.Context, id int64) error {
result, err := m.connection.ExecContext(ctx, "DELETE FROM model WHERE id = ?", id)
if err != nil {
return exterr.WrapWithFrame(err)
}
affected, err := result.RowsAffected()
if err != nil {
return exterr.WrapWithFrame(err)
} else if affected == 0 {
return errorDeleteModel
}
return nil
}
// NextVersion returns next available model version
func (m *Model) NextVersion(ctx context.Context, parameters app.QueryParameters) (int64, error) {
query, queryValues, err := buildExtendedSearchQueryAndValues("SELECT version FROM model", "ORDER BY version DESC LIMIT 1", parameters)
if err != nil {
return metadata.InvalidVersion, err
}
var version int64
err = m.connection.QueryRowContext(ctx, query, queryValues...).Scan(&version)
if err != nil {
if err == sql.ErrNoRows {
return metadata.StartVersion, nil
}
return metadata.InvalidVersion, exterr.WrapWithFrame(err)
}
return metadata.NextVersion(version)
}
// List lists models metadata
func (m *Model) List(ctx context.Context, parameters app.QueryParameters) ([]*app.ModelData, error) {
query, queryValues, err := buildSearchQueryAndValues("SELECT id, team, project, name, version, label, status, created, updated FROM model", parameters)
if err != nil {
return nil, err
}
models := make([]*app.ModelData, 0)
rows, err := m.connection.QueryContext(ctx, query, queryValues...)
if err != nil {
return nil, exterr.WrapWithFrame(err)
}
defer rows.Close()
for rows.Next() {
model := new(app.ModelData)
var statusID uint8
if err := rows.Scan(&model.ID, &model.Team, &model.Project, &model.Name, &model.Version, &model.Label, &statusID, &model.Created, &model.Updated); err != nil {
return nil, exterr.WrapWithFrame(err)
}
model.Status, err = metadata.StatusToName(statusID)
if err != nil {
return nil, err
}
models = append(models, model)
}
if rows.Err() != nil {
return nil, exterr.WrapWithFrame(err)
}
if len(models) == 0 {
return nil, nil
}
return models, nil
}
// ListUniqueTeamProject lists distinct keys (team, project)
func (m *Model) ListUniqueTeamProject(ctx context.Context) ([]*app.ServableID, error) {
servables := make([]*app.ServableID, 0)
rows, err := m.connection.QueryContext(ctx, "SELECT team, project FROM model GROUP BY team, project ORDER BY team, project")
if err != nil {
return nil, exterr.WrapWithFrame(err)
}
defer rows.Close()
for rows.Next() {
servable := new(app.ServableID)
if err := rows.Scan(&servable.Team, &servable.Project); err != nil {
return nil, exterr.WrapWithFrame(err)
}
servables = append(servables, servable)
}
if rows.Err() != nil {
return nil, exterr.WrapWithFrame(err)
}
if len(servables) == 0 {
return nil, nil
}
return servables, nil
}
// RemoveLabel removes model label from metadata for given ModelData
func (m *Model) RemoveLabel(ctx context.Context, model app.ModelData) error {
params := app.QueryParameters{"team": model.Team, "project": model.Project,
"name": model.Name, "label": model.Label}
currentLabeledModel, err := m.Get(ctx, params)
if err != nil {
return err
}
return m.Delete(ctx, currentLabeledModel.ID)
}
func (m *Model) ChangeLabel(ctx context.Context, model app.ModelData) error {
params := app.QueryParameters{"team": model.Team, "project": model.Project,
"name": model.Name, "label": model.Label}
currentLabeledModel, err := m.Get(ctx, params)
if err != nil {
return err
}
tx, err := m.connection.Begin()
if err != nil {
return exterr.WrapWithFrame(err)
}
if currentLabeledModel != nil {
result, err := tx.ExecContext(ctx, "DELETE FROM model WHERE id = ?", currentLabeledModel.ID)
if err != nil {
tx.Rollback()
return exterr.WrapWithFrame(err)
}
affected, err := result.RowsAffected()
if err != nil {
tx.Rollback()
return exterr.WrapWithFrame(err)
} else if affected == 0 {
tx.Rollback()
return errorUpdateModel
}
}
status, err := metadata.StatusToID(model.Status)
if err != nil {
tx.Rollback()
return err
}
timestamp := time.Now().Unix()
_, err = tx.ExecContext(ctx, "INSERT INTO model (team, project, name, version, label, status, created, updated) VALUES(?, ?, ?, ?, ?, ?, ?, ?)",
model.Team,
model.Project,
model.Name,
model.Version,
model.Label,
status,
timestamp,
timestamp)
if err != nil {
tx.Rollback()
return exterr.WrapWithFrame(err)
}
if err := tx.Commit(); err != nil {
return exterr.WrapWithFrame(err)
}
return nil
}
// IsStatusPending checks if status is set to pending
func (m *Model) IsStatusPending(ctx context.Context, servableID app.ServableID) (bool, error) {
return m.isStatusSet(ctx, servableID, metadata.StatusPending)
}
// isStatusSet checks if given status is set
func (m *Model) isStatusSet(ctx context.Context, servableID app.ServableID, status uint8) (bool, error) {
var statusID uint8
err := m.connection.QueryRowContext(ctx, "SELECT status FROM model WHERE team = ? AND project = ? AND name = ? AND status = ? LIMIT 1", servableID.Team, servableID.Project, servableID.Name, status).Scan(&statusID)
if err != nil {
if err == sql.ErrNoRows {
return false, nil
}
return false, exterr.WrapWithFrame(err)
}
return true, nil
}