// Creates a new log entry associated with a log.
func newLogEntry(log *Log, event *ev, index uint64, term uint64, command Command) (*LogEntry, error) {
var buf bytes.Buffer
var commandName string
if command != nil {
commandName = command.CommandName()
if encoder, ok := command.(CommandEncoder); ok {
if err := encoder.Encode(&buf); err != nil {
return nil, err
}
} else {
if err := json.NewEncoder(&buf).Encode(command); err != nil {
return nil, err
}
}
}
pb := &protobuf.LogEntry{
Index: proto.Uint64(index),
Term: proto.Uint64(term),
CommandName: proto.String(commandName),
Command: buf.Bytes(),
}
e := &LogEntry{
pb: pb,
log: log,
event: event,
}
return e, nil
}
// Encodes the SnapshotRecoveryRequest to a buffer. Returns the number of bytes
// written and any error that may have occurred.
func (req *SnapshotRecoveryRequest) Encode(w io.Writer) (int, error) {
protoPeers := make([]*protobuf.SnapshotRecoveryRequest_Peer, len(req.Peers))
for i, peer := range req.Peers {
protoPeers[i] = &protobuf.SnapshotRecoveryRequest_Peer{
Name: proto.String(peer.Name),
ConnectionString: proto.String(peer.ConnectionString),
}
}
pb := &protobuf.SnapshotRecoveryRequest{
LeaderName: proto.String(req.LeaderName),
LastIndex: proto.Uint64(req.LastIndex),
LastTerm: proto.Uint64(req.LastTerm),
Peers: protoPeers,
State: req.State,
}
p, err := proto.Marshal(pb)
if err != nil {
return -1, err
}
return w.Write(p)
}
// Creates a new AppendEntries response.
func newAppendEntriesResponse(term uint64, success bool, index uint64, commitIndex uint64) *AppendEntriesResponse {
pb := &protobuf.AppendEntriesResponse{
Term: proto.Uint64(term),
Index: proto.Uint64(index),
Success: proto.Bool(success),
CommitIndex: proto.Uint64(commitIndex),
}
return &AppendEntriesResponse{
pb: pb,
}
}
// Encodes the SnapshotRequest to a buffer. Returns the number of bytes
// written and any error that may have occurred.
func (req *SnapshotRequest) Encode(w io.Writer) (int, error) {
pb := &protobuf.SnapshotRequest{
LeaderName: proto.String(req.LeaderName),
LastIndex: proto.Uint64(req.LastIndex),
LastTerm: proto.Uint64(req.LastTerm),
}
p, err := proto.Marshal(pb)
if err != nil {
return -1, err
}
return w.Write(p)
}
// Encode writes the response to a writer.
// Returns the number of bytes written and any error that occurs.
func (req *SnapshotRecoveryResponse) Encode(w io.Writer) (int, error) {
pb := &protobuf.SnapshotRecoveryResponse{
Term: proto.Uint64(req.Term),
Success: proto.Bool(req.Success),
CommitIndex: proto.Uint64(req.CommitIndex),
}
p, err := proto.Marshal(pb)
if err != nil {
return -1, err
}
return w.Write(p)
}
// Encodes the RequestVoteRequest to a buffer. Returns the number of bytes
// written and any error that may have occurred.
func (req *RequestVoteRequest) Encode(w io.Writer) (int, error) {
pb := &protobuf.RequestVoteRequest{
Term: proto.Uint64(req.Term),
LastLogIndex: proto.Uint64(req.LastLogIndex),
LastLogTerm: proto.Uint64(req.LastLogTerm),
CandidateName: proto.String(req.CandidateName),
}
p, err := proto.Marshal(pb)
if err != nil {
return -1, err
}
return w.Write(p)
}
// Encodes the AppendEntriesRequest to a buffer. Returns the number of bytes
// written and any error that may have occurred.
func (req *AppendEntriesRequest) Encode(w io.Writer) (int, error) {
pb := &protobuf.AppendEntriesRequest{
Term: proto.Uint64(req.Term),
PrevLogIndex: proto.Uint64(req.PrevLogIndex),
PrevLogTerm: proto.Uint64(req.PrevLogTerm),
CommitIndex: proto.Uint64(req.CommitIndex),
LeaderName: proto.String(req.LeaderName),
Entries: req.Entries,
}
p, err := proto.Marshal(pb)
if err != nil {
return -1, err
}
return w.Write(p)
}
// Encodes the RequestVoteResponse to a buffer. Returns the number of bytes
// written and any error that may have occurred.
func (resp *RequestVoteResponse) Encode(w io.Writer) (int, error) {
pb := &protobuf.RequestVoteResponse{
Term: proto.Uint64(resp.Term),
VoteGranted: proto.Bool(resp.VoteGranted),
}
p, err := proto.Marshal(pb)
if err != nil {
return -1, err
}
return w.Write(p)
}
