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* beginning of raft implementation * raft improvements * remove unnecessary deps * adding raft implementation to graph * finish raft implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| package database | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| apipb "github.com/graphikDB/graphik/gen/grpc/go" | ||
| "github.com/graphikDB/graphik/logger" | ||
| "github.com/graphikDB/graphik/raft/fsm" | ||
| "github.com/hashicorp/raft" | ||
| "github.com/pkg/errors" | ||
| "go.etcd.io/bbolt" | ||
| "google.golang.org/grpc/codes" | ||
| "google.golang.org/grpc/status" | ||
| "google.golang.org/protobuf/proto" | ||
| "google.golang.org/protobuf/types/known/timestamppb" | ||
| "io" | ||
| "time" | ||
| ) | ||
|
|
||
| func (g *Graph) fsm() *fsm.FSM { | ||
| return &fsm.FSM{ | ||
| ApplyFunc: func(log *raft.Log) interface{} { | ||
| var cmd = &apipb.RaftCommand{} | ||
| if err := proto.Unmarshal(log.Data, cmd); err != nil { | ||
| return err | ||
| } | ||
| ctx := g.methodToContext(context.Background(), cmd.Method) | ||
| ctx, usr, err := g.userToContext(ctx, cmd.User.GetAttributes().AsMap()) | ||
| if err != nil { | ||
| return errors.Wrap(err, "raft: userToContext") | ||
| } | ||
| cmd.User = usr | ||
| ctx, cancel := context.WithTimeout(ctx, 5*time.Second) | ||
| defer cancel() | ||
| if msg := cmd.GetSendMessage(); msg != nil { | ||
| if err := g.machine.PubSub().Publish(msg.Channel, &apipb.Message{ | ||
| Channel: msg.Channel, | ||
| Data: msg.Data, | ||
| User: cmd.User.GetRef(), | ||
| Timestamp: timestamppb.Now(), | ||
| Method: g.getMethod(ctx), | ||
| }); err != nil { | ||
| return status.Error(codes.Internal, err.Error()) | ||
| } | ||
| } | ||
| if err := g.db.Batch(func(tx *bbolt.Tx) error { | ||
| if cmd.GetSetAuthorizers() != nil { | ||
| for _, a := range cmd.GetSetAuthorizers().GetAuthorizers() { | ||
| _, err := g.setAuthorizer(ctx, tx, a) | ||
| if err != nil { | ||
| return errors.Wrap(err, "raft: setAuthorizer") | ||
| } | ||
| } | ||
| if err := g.cacheAuthorizers(); err != nil { | ||
| return errors.Wrap(err, "raft: cacheAuthorizers") | ||
| } | ||
| } | ||
| if cmd.GetSetTypeValidators() != nil { | ||
| for _, a := range cmd.GetSetTypeValidators().GetValidators() { | ||
| _, err := g.setTypedValidator(ctx, tx, a) | ||
| if err != nil { | ||
| return errors.Wrap(err, "raft: setTypedValidator") | ||
| } | ||
| } | ||
| if err := g.cacheTypeValidators(); err != nil { | ||
| return errors.Wrap(err, "raft: cacheTypeValidators") | ||
| } | ||
| } | ||
| if cmd.SetIndexes != nil { | ||
| for _, a := range cmd.GetSetIndexes().GetIndexes() { | ||
| _, err := g.setIndex(ctx, tx, a) | ||
| if err != nil { | ||
| return errors.Wrap(err, "raft: setIndex") | ||
| } | ||
| } | ||
| if err := g.cacheIndexes(); err != nil { | ||
| return errors.Wrap(err, "raft: cacheIndexes") | ||
| } | ||
| } | ||
| if len(cmd.SetDocs) > 0 { | ||
| docs, err := g.setDocs(ctx, tx, cmd.SetDocs...) | ||
| if err != nil { | ||
| return errors.Wrap(err, "raft: setDocs") | ||
| } | ||
| cmd.SetDocs = docs.GetDocs() | ||
| } | ||
| if len(cmd.GetSetConnections()) > 0 { | ||
| connections, err := g.setConnections(ctx, tx, cmd.GetSetConnections()...) | ||
| if err != nil { | ||
| return errors.Wrap(err, "raft: setConnections") | ||
| } | ||
| cmd.SetConnections = connections.GetConnections() | ||
| } | ||
| if len(cmd.DelConnections) > 0 { | ||
| for _, r := range cmd.DelConnections { | ||
| err := g.delConnection(ctx, tx, r) | ||
| if err != nil { | ||
| return errors.Wrap(err, "raft: delConnection") | ||
| } | ||
| } | ||
| } | ||
| if len(cmd.DelDocs) > 0 { | ||
| for _, r := range cmd.DelDocs { | ||
| err := g.delDoc(ctx, tx, r) | ||
| if err != nil { | ||
| return errors.Wrap(err, "raft: delDoc") | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| }); err != nil { | ||
| return err | ||
| } | ||
| return cmd | ||
| }, | ||
| SnapshotFunc: func() (*fsm.Snapshot, error) { | ||
| logger.Info("raft: snapshot unimplemented") | ||
| return nil, fmt.Errorf("raft: snapshot unimplemented") | ||
| }, | ||
| RestoreFunc: func(closer io.ReadCloser) error { | ||
| logger.Info("raft: restore unimplemented") | ||
| return fmt.Errorf("raft: restore unimplemented") | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| func (g *Graph) applyCommand(rft *apipb.RaftCommand) (*apipb.RaftCommand, error) { | ||
| bits, err := proto.Marshal(rft) | ||
| i, err := g.raft.Apply(bits) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return i.(*apipb.RaftCommand), nil | ||
| } |
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