This commit is contained in:
Barak Michener 2014-07-24 17:59:39 -04:00
parent 929b4f539b
commit 9793096b9a
2 changed files with 19 additions and 18 deletions

View file

@ -27,13 +27,14 @@ import (
type Procedure byte
// The different types of actions a transaction can do.
const (
Add Procedure = iota
Delete
)
type Transaction struct {
Id int64
ID int64
Triple *Triple
Action Procedure
}
@ -44,7 +45,7 @@ type Replication interface {
AcquireNextIds(size int64) (start int64, end int64)
// Returns the highest current ID.
GetLastId() int64
GetLastID() int64
// Sends the transactions to the replicas.
Replicate([]*Transaction)

View file

@ -12,7 +12,7 @@
// See the License for the specific language governing permissions and
// limitations under the License.
package local
package replication
import (
"sync"
@ -20,38 +20,38 @@ import (
"github.com/google/cayley/graph"
)
type LocalReplication struct {
lastId int64
type Single struct {
lastID int64
ts graph.TripleStore
mut sync.Mutex
}
func NewLocalReplication(ts graph.TripleStore, opts graph.Options) (graph.Replication, error) {
rep := &LocalReplication{lastId: ts.Horizon(), ts: ts}
func NewSingleReplication(ts graph.TripleStore, opts graph.Options) (graph.Replication, error) {
rep := &Single{lastID: ts.Horizon(), ts: ts}
ts.SetReplication(rep)
return rep, nil
}
func (l *LocalReplication) AcquireNextIds(size int64) (start int64, end int64) {
l.mut.Lock()
defer l.mut.Unlock()
start = l.lastId + 1
end = l.lastId + size
l.lastId += size
func (s *Single) AcquireNextIds(size int64) (start int64, end int64) {
s.mut.Lock()
defer s.mut.Unlock()
start = s.lastID + 1
end = s.lastID + size
s.lastID += size
return
}
func (l *LocalReplication) GetLastId() int64 {
return l.lastId
func (s *Single) GetLastID() int64 {
return s.lastID
}
func (l *LocalReplication) Replicate([]*graph.Transaction) {
func (s *Single) Replicate([]*graph.Transaction) {
// Noop, single-machines don't replicate out anywhere.
}
func (l *LocalReplication) RequestTransactionRange(int64, int64) {
func (s *Single) RequestTransactionRange(int64, int64) {
// Single machines also can't catch up.
}
func init() {
graph.RegisterReplication("local", NewLocalReplication)
graph.RegisterReplication("local", NewSingleReplication)
}