//
// Bootstrp
//
func (s *Server) bootstrap() (err error) {
// Initialize server state
s.state = newServerState()
// Initialize repository service
s.repo, err = r.OpenRepository()
if err != nil {
return err
}
s.log = r.NewCommitLog(s.repo)
s.srvConfig = r.NewServerConfig(s.repo)
// Create and initialize new txn state.
s.txn = common.NewTxnState()
// initialize the current transaction id to the lastLoggedTxid. This
// is the txid that this node has seen so far. If this node becomes
// the leader, a new epoch will be used and new current txid will
// be generated. So no need to initialize the epoch at this point.
lastLoggedTxid, err := s.srvConfig.GetLastLoggedTxnId()
if err != nil {
return err
}
s.txn.InitCurrentTxnid(common.Txnid(lastLoggedTxid))
// Initialize various callback facility for leader election and
// voting protocol.
s.factory = message.NewConcreteMsgFactory()
s.handler = action.NewServerAction(s.repo, s.log, s.srvConfig, s, s.txn, s.factory, s)
s.skillch = make(chan bool, 1) // make it buffered to unblock sender
s.site = nil
// Need to start the peer listener before election. A follower may
// finish its election before a leader finishes its election. Therefore,
// a follower node can request a connection to the leader node before that
// node knows it is a leader. By starting the listener now, it allows the
// follower to establish the connection and let the leader handles this
// connection at a later time (when it is ready to be a leader).
s.listener, err = common.StartPeerListener(GetHostTCPAddr())
if err != nil {
return common.WrapError(common.SERVER_ERROR, "Fail to start PeerListener.", err)
}
// Start a request listener.
s.reqListener, err = StartRequestListener(GetHostRequestAddr(), s)
if err != nil {
return common.WrapError(common.SERVER_ERROR, "Fail to start RequestListener.", err)
}
return nil
}
//
// Retrieve entry from server config
//
func (r *ServerConfig) GetInt(key string) (uint64, error) {
k := createConfigKey(key)
data, err := r.repo.Get(SERVER_CONFIG, k)
if err != nil {
return 0, common.WrapError(common.SERVER_CONFIG_ERROR, "Key = "+key, err)
}
return strconv.ParseUint(string(data), 10, 64)
}
//
// Retrieve entry from server config
//
func (r *ServerConfig) GetStr(key string) (string, error) {
k := createConfigKey(key)
data, err := r.repo.Get(SERVER_CONFIG, k)
if err != nil {
return "", common.WrapError(common.SERVER_CONFIG_ERROR, "Key = "+key, err)
}
return string(data), nil
}
//
// Bootstrp
//
func (s *EmbeddedServer) bootstrap() (err error) {
defer func() {
r := recover()
if r != nil {
log.Current.Errorf("panic in EmbeddedServer.bootstrap() : %s\n", r)
log.Current.Errorf("%s", log.Current.StackTrace())
}
if err != nil || r != nil {
common.SafeRun("EmbeddedServer.bootstrap()",
func() {
s.cleanupState()
})
}
}()
// Initialize server state
s.state = newServerState()
// Create and initialize new txn state.
s.txn = common.NewTxnState()
// Initialize repository service
s.repo, err = r.OpenRepositoryWithName(s.repoName, s.quota)
if err != nil {
return err
}
// Initialize server config
s.srvConfig = r.NewServerConfig(s.repo)
// initialize the current transaction id to the lastLoggedTxid. This
// is the txid that this node has seen so far. If this node becomes
// the leader, a new epoch will be used and new current txid will
// be generated. So no need to initialize the epoch at this point.
lastLoggedTxid, err := s.srvConfig.GetLastLoggedTxnId()
if err != nil {
return err
}
s.txn.InitCurrentTxnid(common.Txnid(lastLoggedTxid))
// Initialize commit log
lastCommittedTxid, err := s.srvConfig.GetLastCommittedTxnId()
if err != nil {
return err
}
s.log, err = r.NewTransientCommitLog(s.repo, lastCommittedTxid)
if err != nil {
return err
}
// Initialize various callback facility for leader election and
// voting protocol.
s.factory = message.NewConcreteMsgFactory()
s.handler = action.NewServerActionWithNotifier(s.repo, s.log, s.srvConfig, s, s.notifier, s.txn, s.factory, s)
s.skillch = make(chan bool, 1) // make it buffered to unblock sender
// Need to start the peer listener before election. A follower may
// finish its election before a leader finishes its election. Therefore,
// a follower node can request a connection to the leader node before that
// node knows it is a leader. By starting the listener now, it allows the
// follower to establish the connection and let the leader handles this
// connection at a later time (when it is ready to be a leader).
s.listener, err = common.StartPeerListener(s.msgAddr)
if err != nil {
err = common.WrapError(common.SERVER_ERROR, "Fail to start PeerListener. err = %v", err)
return
}
return nil
}
