// StartInstancePush initiates a data instance push. After some number of Send
// calls, the EndInstancePush must be called.
func (p *PushSession) StartInstancePush(d dvid.Data) error {
dmsg := DataTxInit{
Session: p.s.ID(),
DataName: d.DataName(),
TypeName: d.TypeName(),
InstanceID: d.InstanceID(),
}
if _, err := p.s.Call()(StartDataMsg, dmsg); err != nil {
return fmt.Errorf("couldn't send data instance %q start: %v\n", d.DataName(), err)
}
return nil
}
// DeleteDataInstance removes a data instance across all versions and tiers of storage.
func DeleteDataInstance(data dvid.Data) error {
if !manager.setup {
return fmt.Errorf("Can't delete data instance %q before storage manager is initialized", data.DataName())
}
// Determine all database tiers that are distinct.
dbs := []OrderedKeyValueDB{manager.mutable}
if manager.mutable != manager.immutable {
dbs = append(dbs, manager.immutable)
}
// For each storage tier, remove all key-values with the given instance id.
dvid.Infof("Starting delete of instance %d: name %q, type %s\n", data.InstanceID(), data.DataName(), data.TypeName())
ctx := NewDataContext(data, 0)
for _, db := range dbs {
if err := db.DeleteAll(ctx, true); err != nil {
return err
}
}
return nil
}
// DeleteDataInstance removes a data instance.
func DeleteDataInstance(data dvid.Data) error {
if !manager.setup {
return fmt.Errorf("Can't delete data instance %q before storage manager is initialized", data.DataName())
}
// Get the store for the data instance.
store, err := data.BackendStore()
if err != nil {
return err
}
db, ok := store.(OrderedKeyValueDB)
if !ok {
return fmt.Errorf("store assigned to data %q is not an ordered kv db with ability to delete all", data.DataName())
}
dvid.Infof("Starting delete of instance %d: name %q, type %s\n", data.InstanceID(), data.DataName(), data.TypeName())
ctx := NewDataContext(data, 0)
if err := db.DeleteAll(ctx, true); err != nil {
return err
}
return nil
}
