69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
package raft
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import (
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"code.google.com/p/goprotobuf/proto"
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"github.com/goraft/raft/protobuf"
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"io"
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"io/ioutil"
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)
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// The request sent to a server to vote for a candidate to become a leader.
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type RequestVoteRequest struct {
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peer *Peer
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Term uint64
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LastLogIndex uint64
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LastLogTerm uint64
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CandidateName string
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}
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// Creates a new RequestVote request.
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func newRequestVoteRequest(term uint64, candidateName string, lastLogIndex uint64, lastLogTerm uint64) *RequestVoteRequest {
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return &RequestVoteRequest{
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Term: term,
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LastLogIndex: lastLogIndex,
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LastLogTerm: lastLogTerm,
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CandidateName: candidateName,
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}
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}
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// Encodes the RequestVoteRequest to a buffer. Returns the number of bytes
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// written and any error that may have occurred.
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func (req *RequestVoteRequest) encode(w io.Writer) (int, error) {
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pb := &protobuf.ProtoRequestVoteRequest{
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Term: proto.Uint64(req.Term),
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LastLogIndex: proto.Uint64(req.LastLogIndex),
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LastLogTerm: proto.Uint64(req.LastLogTerm),
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CandidateName: proto.String(req.CandidateName),
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}
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p, err := proto.Marshal(pb)
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if err != nil {
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return -1, err
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}
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return w.Write(p)
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}
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// Decodes the RequestVoteRequest from a buffer. Returns the number of bytes read and
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// any error that occurs.
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func (req *RequestVoteRequest) decode(r io.Reader) (int, error) {
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data, err := ioutil.ReadAll(r)
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if err != nil {
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return -1, err
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}
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totalBytes := len(data)
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pb := &protobuf.ProtoRequestVoteRequest{}
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if err = proto.Unmarshal(data, pb); err != nil {
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return -1, err
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}
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req.Term = pb.GetTerm()
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req.LastLogIndex = pb.GetLastLogIndex()
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req.LastLogTerm = pb.GetLastLogTerm()
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req.CandidateName = pb.GetCandidateName()
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return totalBytes, nil
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}
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