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package fuzzy
import (
"fmt"
"log"
"path/filepath"
"time"
"github.com/hashicorp/raft"
rdb "github.com/hashicorp/raft-boltdb"
)
type raftNode struct {
transport *transport
store *rdb.BoltStore
raft *raft.Raft
log *log.Logger
fsm *fuzzyFSM
name string
dir string
}
func newRaftNode(logger *log.Logger, tc *transports, h TransportHooks, nodes []string, name string) (*raftNode, error) {
datadir, err := resolveDirectory(fmt.Sprintf("data/%v", name), true)
if err != nil {
return nil, err
}
logger.Printf("[INFO] Creating new raft Node with data in dir %v", datadir)
ss, err := raft.NewFileSnapshotStoreWithLogger(datadir, 5, logger)
if err != nil {
return nil, fmt.Errorf("Unable to initialize snapshots %v\n", err.Error())
}
transport := tc.AddNode(name, h)
config := raft.DefaultConfig()
config.SnapshotThreshold = 1409600
config.SnapshotInterval = time.Hour
config.Logger = logger
config.ShutdownOnRemove = false
config.LocalID = raft.ServerID(name)
store, err := rdb.NewBoltStore(filepath.Join(datadir, "store.bolt"))
if err != nil {
return nil, fmt.Errorf("Unable to initialize log %v\n", err.Error())
}
if len(nodes) > 0 {
c := make([]raft.Server, 0, len(nodes))
for _, n := range nodes {
c = append(c, raft.Server{Suffrage: raft.Voter, ID: raft.ServerID(n), Address: raft.ServerAddress(n)})
}
configuration := raft.Configuration{c}
if err := raft.BootstrapCluster(config, store, store, ss, transport, configuration); err != nil {
return nil, err
}
}
fsm := &fuzzyFSM{}
raft, err := raft.NewRaft(config, fsm, store, store, ss, transport)
if err != nil {
return nil, err
}
n := raftNode{
transport: transport,
store: store,
raft: raft,
fsm: fsm,
log: logger,
name: name,
dir: datadir,
}
return &n, nil
}
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