80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"github.com/xiangli-cmu/go-raft"
|
|
"io"
|
|
"net/http"
|
|
)
|
|
|
|
type transHandler struct {
|
|
name string
|
|
client *http.Client
|
|
}
|
|
|
|
// Sends AppendEntries RPCs to a peer when the server is the leader.
|
|
func (t transHandler) SendAppendEntriesRequest(server *raft.Server, peer *raft.Peer, req *raft.AppendEntriesRequest) (*raft.AppendEntriesResponse, error) {
|
|
var aersp *raft.AppendEntriesResponse
|
|
var b bytes.Buffer
|
|
json.NewEncoder(&b).Encode(req)
|
|
|
|
debug("Send LogEntries to %s ", peer.Name())
|
|
|
|
resp, err := Post(&t, fmt.Sprintf("%s/log/append", peer.Name()), &b)
|
|
|
|
if resp != nil {
|
|
defer resp.Body.Close()
|
|
aersp = &raft.AppendEntriesResponse{}
|
|
if err = json.NewDecoder(resp.Body).Decode(&aersp); err == nil || err == io.EOF {
|
|
return aersp, nil
|
|
}
|
|
|
|
}
|
|
return aersp, fmt.Errorf("raftd: Unable to append entries: %v", err)
|
|
}
|
|
|
|
// Sends RequestVote RPCs to a peer when the server is the candidate.
|
|
func (t transHandler) SendVoteRequest(server *raft.Server, peer *raft.Peer, req *raft.RequestVoteRequest) (*raft.RequestVoteResponse, error) {
|
|
var rvrsp *raft.RequestVoteResponse
|
|
var b bytes.Buffer
|
|
json.NewEncoder(&b).Encode(req)
|
|
|
|
debug("Send Vote to %s", peer.Name())
|
|
|
|
resp, err := Post(&t, fmt.Sprintf("%s/vote", peer.Name()), &b)
|
|
|
|
if resp != nil {
|
|
defer resp.Body.Close()
|
|
rvrsp := &raft.RequestVoteResponse{}
|
|
if err = json.NewDecoder(resp.Body).Decode(&rvrsp); err == nil || err == io.EOF {
|
|
return rvrsp, nil
|
|
}
|
|
|
|
}
|
|
return rvrsp, fmt.Errorf("Unable to request vote: %v", err)
|
|
}
|
|
|
|
// Sends SnapshotRequest RPCs to a peer when the server is the candidate.
|
|
func (t transHandler) SendSnapshotRequest(server *raft.Server, peer *raft.Peer, req *raft.SnapshotRequest) (*raft.SnapshotResponse, error) {
|
|
var aersp *raft.SnapshotResponse
|
|
var b bytes.Buffer
|
|
json.NewEncoder(&b).Encode(req)
|
|
|
|
debug("Send Snapshot to %s [Last Term: %d, LastIndex %d]", peer.Name(),
|
|
req.LastTerm, req.LastIndex)
|
|
|
|
resp, err := Post(&t, fmt.Sprintf("%s/snapshot", peer.Name()), &b)
|
|
|
|
if resp != nil {
|
|
defer resp.Body.Close()
|
|
aersp = &raft.SnapshotResponse{}
|
|
if err = json.NewDecoder(resp.Body).Decode(&aersp); err == nil || err == io.EOF {
|
|
|
|
return aersp, nil
|
|
}
|
|
}
|
|
return aersp, fmt.Errorf("Unable to send snapshot: %v", err)
|
|
}
|