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https://github.com/featurebasedb/featurebase.git
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be4f365eaf
Switch Serverless from using BoltDB to Postgres as metadata store. Previously, the controller stored all metadata to BoltDB. This implements SQLDB (currently Postgres flavored) as the backing store for metadata. This will allow us to have multiple instances of the controller running for HA, and to easily inspect and repair the contents of the metadata store. Unfortunately, it was not straightforward to keep the BoltDB implementation working alongside the SQL one, so it will be removed in a later patch. Once that's done, the SQL implementation should allow for a number of simplifications of the schemar and balancer interfaces. Database migration is built directly into the application by embedding the migration files and logic from the `soda` command line tool. When connecting to the RDBMS, the app will always attempt to create the necessary database and apply any outstanding migrations. Integration tests truncate all tables upon start, but *not* at the end, so the state of the database can be inspected after integration tests. Had to refactor some of the controller's background tasks to make sure they get properly shut down on controller exit.
92 lines
2.8 KiB
Go
92 lines
2.8 KiB
Go
package sqldb
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import (
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"fmt"
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"github.com/featurebasedb/featurebase/v3/dax"
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"github.com/featurebasedb/featurebase/v3/dax/controller/balancer"
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"github.com/featurebasedb/featurebase/v3/dax/models"
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"github.com/featurebasedb/featurebase/v3/logger"
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"github.com/pkg/errors"
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)
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func NewFreeJobService(log logger.Logger) balancer.FreeJobService {
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if log == nil {
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log = logger.NopLogger
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}
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return &freeJobService{
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log: log,
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}
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}
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type freeJobService struct {
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log logger.Logger
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}
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func (fj *freeJobService) CreateJobs(tx dax.Transaction, roleType dax.RoleType, qdbid dax.QualifiedDatabaseID, job ...dax.Job) error {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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jobs := make(models.Jobs, len(job))
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for i, j := range job {
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jobs[i] = models.Job{
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Name: j,
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Role: roleType,
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DatabaseID: qdbid.DatabaseID,
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}
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}
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err := dt.C.Create(jobs)
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return errors.Wrap(err, "creating jobs")
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}
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func (fj *freeJobService) DeleteJob(tx dax.Transaction, roleType dax.RoleType, qdbid dax.QualifiedDatabaseID, job dax.Job) error {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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err := dt.C.RawQuery("DELETE from jobs where role = ? and database_id = ? and name = ? and worker_id is NULL", roleType, qdbid.DatabaseID, job).Exec()
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return errors.Wrap(err, "deleting")
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}
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func (fj *freeJobService) DeleteJobsForTable(tx dax.Transaction, roleType dax.RoleType, qtid dax.QualifiedTableID) error {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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err := dt.C.RawQuery("DELETE from jobs where role = ? and database_id = ? and name LIKE ? and worker_id is NULL",
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roleType, qtid.DatabaseID, fmt.Sprintf("%s%%", qtid.Key())).Exec()
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return errors.Wrap(err, "deleting")
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}
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func (fj *freeJobService) ListJobs(tx dax.Transaction, roleType dax.RoleType, qdbid dax.QualifiedDatabaseID) (dax.Jobs, error) {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return nil, dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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jobs := make(models.Jobs, 0)
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err := dt.C.Where("role = ? and database_id = ? and worker_id is NULL", roleType, qdbid.DatabaseID).Order("name asc").All(&jobs)
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if err != nil {
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return nil, errors.Wrap(err, "querying for jobs")
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}
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djs := make(dax.Jobs, len(jobs))
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for i, job := range jobs {
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djs[i] = job.Name
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}
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return djs, nil
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}
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// MergeJobs - AFAICT this means "mark these jobs as free"
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func (fj *freeJobService) MergeJobs(tx dax.Transaction, roleType dax.RoleType, qdbid dax.QualifiedDatabaseID, jobs dax.Jobs) error {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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err := dt.C.RawQuery("UPDATE jobs SET worker_id = NULL WHERE role = ? and database_id = ?", roleType, qdbid.DatabaseID).Exec()
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return errors.Wrap(err, "marking jobs free")
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}
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