db/db.go

@@ -341,24 +341,10 @@ func interruptRequested(interrupted <-chan struct{}) bool {
 func IterCF(db *grocksdb.DB, opts *IterOptions) <-chan *prefixes.PrefixRowKV {
 	ch := make(chan *prefixes.PrefixRowKV)
 
-	// iterKey := fmt.Sprintf("%p", opts)
+	// Check if we've been told to shutdown in between getting created and getting here
-	if opts.DB != nil {
+	if opts.Grp != nil && interruptRequested(opts.Grp.Ch()) {
-		// opts.DB.ItMut.Lock()
+		opts.Grp.Done()
-		// // There is a tiny chance that we were wating on the above lock while shutdown was
+		return ch
-		// // being called and by the time we get it the db has already notified all active
-		// // iterators to shutdown. In this case we go to the else branch.
-		// if !opts.DB.ShutdownCalled {
-		// 	opts.DB.OpenIterators[iterKey] = []chan struct{}{opts.DoneChan, opts.ShutdownChan}
-		// 	opts.DB.ItMut.Unlock()
-		// } else {
-		// 	opts.DB.ItMut.Unlock()
-		// 	return ch
-		// }
-		if opts.DB.ShutdownCalled && opts.Grp != nil {
-			// opts.Grp.DoneNamed(iterKey)
-			opts.Grp.Done()
-			return ch
-		}
 	}
 
 	ro := grocksdb.NewDefaultReadOptions()
@@ -376,13 +362,9 @@ func IterCF(db *grocksdb.DB, opts *IterOptions) <-chan *prefixes.PrefixRowKV {
 			it.Close()
 			close(ch)
 			ro.Destroy()
-			if opts.DB != nil && opts.Grp != nil {
+			if opts.Grp != nil {
 				// opts.Grp.DoneNamed(iterKey)
 				opts.Grp.Done()
-				// opts.DoneChan <- struct{}{}
-				// opts.DB.ItMut.Lock()
-				// delete(opts.DB.OpenIterators, iterKey)
-				// opts.DB.ItMut.Unlock()
 			}
 		}()
 

db/iteroptions.go

@@ -24,9 +24,7 @@ type IterOptions struct {
 	RawKey       bool
 	RawValue     bool
 	Grp          *stop.Group
-	// ShutdownChan chan struct{}
+	// DB           *ReadOnlyDBColumnFamily
-	// DoneChan     chan struct{}
-	DB         *ReadOnlyDBColumnFamily
 	CfHandle   *grocksdb.ColumnFamilyHandle
 	It         *grocksdb.Iterator
 	Serializer *prefixes.SerializationAPI
@@ -46,9 +44,7 @@ func NewIterateOptions() *IterOptions {
 		RawKey:       false,
 		RawValue:     false,
 		Grp:          nil,
-		// ShutdownChan: make(chan struct{}, 1),
+		// DB:           nil,
-		// DoneChan:     make(chan struct{}, 1),
-		DB:         nil,
 		CfHandle:   nil,
 		It:         nil,
 		Serializer: prefixes.ProductionAPI,
@@ -111,9 +107,6 @@ func (o *IterOptions) WithRawValue(rawValue bool) *IterOptions {
 }
 
 func (o *IterOptions) WithDB(db *ReadOnlyDBColumnFamily) *IterOptions {
-	o.DB = db
-	// o.Grp = stop.NewDebug(db.Grp)
-	// iterKey := fmt.Sprintf("%p", o)
 	// o.Grp.AddNamed(1, iterKey)
 	o.Grp = stop.New(db.Grp)
 	o.Grp.Add(1)

server/jsonrpc_blockchain_test.go

@@ -189,6 +189,7 @@ func TestHeaders(t *testing.T) {
 }
 
 func TestHeadersSubscribe(t *testing.T) {
+	args := MakeDefaultTestArgs()
 	secondaryPath := "asdf"
 	db, toDefer, err := db.GetProdDB(regTestDBPath, secondaryPath)
 	defer toDefer()
@@ -197,7 +198,7 @@ func TestHeadersSubscribe(t *testing.T) {
 		return
 	}
 
-	sm := newSessionManager(db, &chaincfg.RegressionNetParams, DefaultMaxSessions, DefaultSessionTimeout)
+	sm := newSessionManager(db, args, &chaincfg.RegressionNetParams, DefaultMaxSessions, DefaultSessionTimeout)
 	sm.start()
 	defer sm.stop()
 
@@ -367,6 +368,7 @@ func TestListUnspent(t *testing.T) {
 }
 
 func TestAddressSubscribe(t *testing.T) {
+	args := MakeDefaultTestArgs()
 	secondaryPath := "asdf"
 	db, toDefer, err := db.GetProdDB(regTestDBPath, secondaryPath)
 	defer toDefer()
@@ -375,7 +377,7 @@ func TestAddressSubscribe(t *testing.T) {
 		return
 	}
 
-	sm := newSessionManager(db, &chaincfg.RegressionNetParams, DefaultMaxSessions, DefaultSessionTimeout)
+	sm := newSessionManager(db, args, &chaincfg.RegressionNetParams, DefaultMaxSessions, DefaultSessionTimeout)
 	sm.start()
 	defer sm.stop()
 

server/jsonrpc_server.go

@@ -4,6 +4,10 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
+type ServerService struct {
+	Args *Args
+}
+
 type ServerFeatureService struct {
 	Args *Args
 }
@@ -26,7 +30,7 @@ type ServerFeaturesRes struct {
 }
 
 // Features is the json rpc endpoint for 'server.features'.
-func (t *ServerFeatureService) Features(req *ServerFeaturesReq, res **ServerFeaturesRes) error {
+func (t *ServerService) Features(req *ServerFeaturesReq, res **ServerFeaturesRes) error {
 	log.Println("Features")
 
 	features := &ServerFeaturesRes{
@@ -57,7 +61,7 @@ type ServerBannerReq struct{}
 type ServerBannerRes string
 
 // Banner is the json rpc endpoint for 'server.banner'.
-func (t *ServerBannerService) Banner(req *ServerBannerReq, res **ServerBannerRes) error {
+func (t *ServerService) Banner(req *ServerBannerReq, res **ServerBannerRes) error {
 	log.Println("Banner")
 
 	*res = (*ServerBannerRes)(t.Args.Banner)
@@ -76,7 +80,7 @@ type ServerVersionRes string
 // Banner is the json rpc endpoint for 'server.version'.
 // FIXME: This should return a struct with the version and the protocol version.
 // <<-- that comment was written by github, scary shit because it's true
-func (t *ServerVersionService) Version(req *ServerVersionReq, res **ServerVersionRes) error {
+func (t *ServerService) Version(req *ServerVersionReq, res **ServerVersionRes) error {
 	log.Println("Version")
 
 	*res = (*ServerVersionRes)(&t.Args.ServerVersion)

server/jsonrpc_service.go

@@ -122,26 +122,32 @@ fail1:
 		}
 
 		// Register "server.{features,banner,version}" handlers.
-		serverFeatureSvc := &ServerFeatureService{s.Args}
+		serverSvc := &ServerService{s.Args}
-		err = s1.RegisterTCPService(serverFeatureSvc, "server_features")
+		err = s1.RegisterTCPService(serverSvc, "server")
 		if err != nil {
 			log.Errorf("RegisterTCPService: %v\n", err)
 			goto fail2
 		}
+		// serverFeatureSvc := &ServerFeatureService{s.Args}
+		// err = s1.RegisterTCPService(serverFeatureSvc, "server_features")
+		// if err != nil {
+		// 	log.Errorf("RegisterTCPService: %v\n", err)
+		// 	goto fail2
+		// }
 
-		serverBannerSvc := &ServerBannerService{s.Args}
+		// serverBannerSvc := &ServerBannerService{s.Args}
-		err = s1.RegisterTCPService(serverBannerSvc, "server_banner")
+		// err = s1.RegisterTCPService(serverBannerSvc, "server_banner")
-		if err != nil {
+		// if err != nil {
-			log.Errorf("RegisterTCPService: %v\n", err)
+		// 	log.Errorf("RegisterTCPService: %v\n", err)
-			goto fail2
+		// 	goto fail2
-		}
+		// }
 
-		serverVersionSvc := &ServerVersionService{s.Args}
+		// serverVersionSvc := &ServerVersionService{s.Args}
-		err = s1.RegisterTCPService(serverVersionSvc, "server_version")
+		// err = s1.RegisterTCPService(serverVersionSvc, "server_version")
-		if err != nil {
+		// if err != nil {
-			log.Errorf("RegisterTCPService: %v\n", err)
+		// 	log.Errorf("RegisterTCPService: %v\n", err)
-			goto fail2
+		// 	goto fail2
-		}
+		// }
 
 		r := gorilla_mux.NewRouter()
 		r.Handle("/rpc", s1)

server/server.go

@@ -274,7 +274,7 @@ func MakeHubServer(grp *stop.Group, args *Args) *Server {
 		if err != nil {
 			logrus.Warning(err)
 		}
-		myDB.Grp = stop.NewDebug(grp)
+		myDB.Grp = stop.New(grp)
 	}
 
 	// Determine which chain to use based on db and cli values
@@ -340,7 +340,7 @@ func MakeHubServer(grp *stop.Group, args *Args) *Server {
 		HeightSubsMut:    sync.RWMutex{},
 		NotifierChan:     make(chan interface{}),
 		Grp:              grp,
-		sessionManager:   newSessionManager(myDB, &chain, args.MaxSessions, args.SessionTimeout),
+		sessionManager:   newSessionManager(myDB, args, &chain, args.MaxSessions, args.SessionTimeout),
 	}
 
 	// Start up our background services

server/session.go

@@ -121,6 +121,7 @@ type sessionManager struct {
 	sessionTimeout time.Duration
 	manageTicker   *time.Ticker
 	db             *db.ReadOnlyDBColumnFamily
+	args           *Args
 	chain          *chaincfg.Params
 	// headerSubs are sessions subscribed via 'blockchain.headers.subscribe'
 	headerSubs sessionMap
@@ -128,13 +129,14 @@ type sessionManager struct {
 	hashXSubs map[[HASHX_LEN]byte]sessionMap
 }
 
-func newSessionManager(db *db.ReadOnlyDBColumnFamily, chain *chaincfg.Params, sessionsMax, sessionTimeout int) *sessionManager {
+func newSessionManager(db *db.ReadOnlyDBColumnFamily, args *Args, chain *chaincfg.Params, sessionsMax, sessionTimeout int) *sessionManager {
 	return &sessionManager{
 		sessions:       make(sessionMap),
 		sessionsMax:    sessionsMax,
 		sessionTimeout: time.Duration(sessionTimeout) * time.Second,
 		manageTicker:   time.NewTicker(time.Duration(max(5, sessionTimeout/20)) * time.Second),
 		db:             db,
+		args:           args,
 		chain:          chain,
 		headerSubs:     make(sessionMap),
 		hashXSubs:      make(map[[HASHX_LEN]byte]sessionMap),
@@ -190,9 +192,16 @@ func (sm *sessionManager) addSession(conn net.Conn) *session {
 	// each request and update subscriptions.
 	s1 := rpc.NewServer()
 
+	// Register "server.{features,banner,version}" handlers.
+	serverSvc := &ServerService{sm.args}
+	err := s1.RegisterName("server", serverSvc)
+	if err != nil {
+		log.Errorf("RegisterTCPService: %v\n", err)
+	}
+
 	// Register "blockchain.claimtrie.*"" handlers.
 	claimtrieSvc := &ClaimtrieService{sm.db}
-	err := s1.RegisterName("blockchain.claimtrie", claimtrieSvc)
+	err = s1.RegisterName("blockchain.claimtrie", claimtrieSvc)
 	if err != nil {
 		log.Errorf("RegisterService: %v\n", err)
 	}