Set up multiple conns in config

config/config.go

@@ -3,17 +3,21 @@ package config
 import (
 	"strings"
 
+	"git.defalsify.org/vise.git/logging"
 	"git.grassecon.net/grassrootseconomics/visedriver/env"
+	"git.grassecon.net/grassrootseconomics/visedriver/storage"
 )
 
 var (
+	logg = logging.NewVanilla().WithDomain("visedriver-config")
 	defaultLanguage		   = "eng"
 	languages []string
-)
-
-var (
-	DbConn		string
 	DefaultLanguage	    string
+	dbConn	string
+	dbConnMissing	bool
+	stateDbConn	string
+	resourceDbConn	string
+	userDbConn	string
 	Languages	[]string
 )
 
@@ -35,13 +39,64 @@ func setLanguage() error {
 	return nil
 }
 
-
-
 func setConn() error {
-	DbConn = env.GetEnv("DB_CONN", "")
+	dbConn = env.GetEnv("DB_CONN", "?")
+	stateDbConn = env.GetEnv("DB_CONN_STATE", dbConn)
+	resourceDbConn = env.GetEnv("DB_CONN_RESOURCE", dbConn)
+	userDbConn = env.GetEnv("DB_CONN_USER", dbConn)
 	return nil
 }
 
+func ApplyConn(connStr *string, stateConnStr *string, resourceConnStr *string, userConnStr *string) {
+	if connStr != nil {
+		dbConn = *connStr
+	}
+	if stateConnStr != nil {
+		stateDbConn = *stateConnStr
+	}
+	if resourceConnStr != nil {
+		resourceDbConn = *resourceConnStr
+	}
+	if userConnStr != nil {
+		userDbConn = *userConnStr
+	}
+
+	if dbConn == "?" {
+		logg.Warnf("no db connection found, using memdb for everything")
+		dbConn = ""
+	}
+
+	if stateDbConn == "?" {
+		stateDbConn = dbConn
+	}
+	if resourceDbConn == "?" {
+		resourceDbConn = dbConn
+	}
+	if userDbConn == "?" {
+		userDbConn = dbConn
+	}
+}
+
+func GetConns() (storage.Conns, error) {
+	o := storage.NewConns()
+	c, err := storage.ToConnData(stateDbConn)
+	if err != nil {
+		return o, err
+	}
+	o.Set(c, storage.STORETYPE_STATE)
+	c, err = storage.ToConnData(resourceDbConn)
+	if err != nil {
+		return o, err
+	}
+	o.Set(c, storage.STORETYPE_RESOURCE)
+	c, err = storage.ToConnData(userDbConn)
+	if err != nil {
+		return o, err
+	}
+	o.Set(c, storage.STORETYPE_USER)
+	return o, nil
+}
+
 // LoadConfig initializes the configuration values after environment variables are loaded.
 func LoadConfig() error {
 	err := setConn()

storage/conn.go

@@ -0,0 +1,73 @@
+package storage
+
+import (
+	"fmt"
+	"net/url"
+)
+
+const (
+	DBTYPE_NONE = iota
+	DBTYPE_MEM
+	DBTYPE_FS
+	DBTYPE_GDBM
+	DBTYPE_POSTGRES
+)
+
+const (
+	STORETYPE_STATE = iota
+	STORETYPE_RESOURCE
+	STORETYPE_USER
+	_STORETYPE_MAX
+)
+
+type Conns map[int8]ConnData
+
+func NewConns() Conns {
+	c := make(Conns)
+	return c
+}
+
+func (c Conns) Set(conn ConnData, typ int8) {
+	if typ < 0 || typ >= _STORETYPE_MAX {
+		panic(fmt.Errorf("invalid store type: %d", typ))
+	}
+	c[typ] = conn
+}
+
+func (c Conns) Have(conn *ConnData) int8 {
+	for i := range(_STORETYPE_MAX) {
+		ii := int8(i)
+		v, ok := c[ii]
+		if !ok {
+			continue
+		}
+		if v.String() == conn.String() {
+			return ii
+		}
+	}
+	return -1
+}
+
+type ConnData struct {
+	typ int
+	str string
+	domain string
+}
+
+func (cd *ConnData) DbType() int {
+	return cd.typ
+}
+
+func (cd *ConnData) String() string {
+	return cd.str
+}
+
+func (cd *ConnData) Domain() string {
+	return cd.domain
+}
+
+func (cd *ConnData) Path() string {
+	v, _ := url.Parse(cd.str)
+	v.RawQuery = ""
+	return v.String()
+}

storage/db/gdbm/gdbm.go

@@ -141,3 +141,7 @@ func(tdb *ThreadGdbmDb) Start(ctx context.Context) error {
 func(tdb *ThreadGdbmDb) Stop(ctx context.Context) error {
 	return tdb.db.Stop(ctx)
 }
+
+func(tdb *ThreadGdbmDb) Connection() string {
+	return tdb.db.Connection()
+}

storage/parse.go

@@ -7,38 +7,6 @@ import (
 	"path/filepath"
 )
 
-const (
-	DBTYPE_NONE = iota
-	DBTYPE_MEM
-	DBTYPE_FS
-	DBTYPE_GDBM
-	DBTYPE_POSTGRES
-)
-
-type ConnData struct {
-	typ int
-	str string
-	domain string
-}
-
-func (cd *ConnData) DbType() int {
-	return cd.typ
-}
-
-func (cd *ConnData) String() string {
-	return cd.str
-}
-
-func (cd *ConnData) Domain() string {
-	return cd.domain
-}
-
-func (cd *ConnData) Path() string {
-	v, _ := url.Parse(cd.str)
-	v.RawQuery = ""
-	return v.String()
-}
-
 func probePostgres(s string) (string, string, bool) {
 	domain := "public"
 	v, err := url.Parse(s)

storage/storage_service.go

@@ -2,6 +2,7 @@ package storage
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"os"
 	"path"
@@ -29,53 +30,77 @@ type StorageService interface {
 
 // TODO: Support individual backend for each store (conndata)
 type MenuStorageService struct {
-	conn ConnData
-	resourceDir   string
+	conns Conns
 	poResource    resource.Resource
-	resourceStore db.Db
-	stateStore    db.Db
-	userDataStore db.Db
+	store map[int8]db.Db
 }
 
-func NewMenuStorageService(conn ConnData, resourceDir string) *MenuStorageService {
+func NewMenuStorageService(conn Conns) *MenuStorageService {
 	return &MenuStorageService{
-		conn: conn,
-		resourceDir: resourceDir,
+		conns: conn,
+		store: make(map[int8]db.Db),
 	}
 }
 
-func (ms *MenuStorageService) WithResourceDir(resourceDir string) *MenuStorageService {
-	ms.resourceDir = resourceDir
+func (ms *MenuStorageService) WithDb(store db.Db, typ int8) *MenuStorageService {
+	var err error
+	if ms.store[typ] != nil {
+		panic(fmt.Errorf("db already set for typ: %d", typ))
+	}
+	ms.store[typ] = store
+	ms.conns[typ], err = ToConnData(store.Connection())
+	if err != nil {
+		panic(err)
+	}
 	return ms
 }
 
-// TODO: allow fsdb, memdb
-func (ms *MenuStorageService) getOrCreateDb(ctx context.Context, existingDb db.Db, section string, typ string) (db.Db, error) {
-	var newDb db.Db
+func (ms *MenuStorageService) checkDb(ctx context.Context,typ int8) db.Db {
+	store := ms.store[typ]
+	if store != nil {
+		return store
+	}
+	connData := ms.conns[typ]
+	v := ms.conns.Have(&connData)
+	if v == -1 {
+		return nil
+	}
+	src := ms.store[v]
+	if src == nil {
+		return nil
+	}
+	ms.store[typ] = ms.store[v]
+	logg.InfoCtxf(ctx, "found existing db", "typ", typ, "srctyp", v, "store", ms.store[typ], "srcstore", ms.store[v])
+	return ms.store[typ]
+}
+
+func (ms *MenuStorageService) getOrCreateDb(ctx context.Context, section string, typ int8) (db.Db, error) {
 	var err error
 
-	if existingDb != nil {
-		return existingDb, nil
+	newDb := ms.checkDb(ctx, typ)
+	if newDb != nil {
+		return newDb, nil
 	}
 
-	connStr := ms.conn.String()
-	dbTyp := ms.conn.DbType()
+	connData := ms.conns[typ]
+	connStr := connData.String()
+	dbTyp := connData.DbType()
 	if dbTyp == DBTYPE_POSTGRES {
 		// TODO: move to vise
-		err = ensureSchemaExists(ctx, ms.conn)
+		err = ensureSchemaExists(ctx, connData)
 		if err != nil {
 			return nil, err
 		}
-		newDb = postgres.NewPgDb().WithSchema(ms.conn.Domain())
+		newDb = postgres.NewPgDb().WithSchema(connData.Domain())
 	} else if dbTyp == DBTYPE_GDBM {
-		err = ms.ensureDbDir()
+		err = ms.ensureDbDir(connStr)
 		if err != nil {
 			return nil, err
 		}
 		connStr = path.Join(connStr, section)
 		newDb = gdbmstorage.NewThreadGdbmDb()
 	} else if dbTyp == DBTYPE_FS {
-		err = ms.ensureDbDir()
+		err = ms.ensureDbDir(connStr)
 		if err != nil {
 			return nil, err
 		}
@@ -83,13 +108,14 @@ func (ms *MenuStorageService) getOrCreateDb(ctx context.Context, existingDb db.D
 	} else if dbTyp == DBTYPE_MEM {
 		logg.WarnCtxf(ctx, "using volatile storage (memdb)")
 	} else {
-		return nil, fmt.Errorf("unsupported connection string: '%s'\n", ms.conn.String())
+		return nil, fmt.Errorf("unsupported connection string: '%s'\n", connData.String())
 	}
-	logg.DebugCtxf(ctx, "connecting to db", "conn", connStr, "conndata", ms.conn, "typ", typ)
+	logg.DebugCtxf(ctx, "connecting to db", "conn", connData, "typ", typ)
 	err = newDb.Connect(ctx, connStr)
 	if err != nil {
 		return nil, err
 	}
+	ms.store[typ] = newDb
 
 	return newDb, nil
 }
@@ -145,26 +171,15 @@ func (ms *MenuStorageService) GetPersister(ctx context.Context) (*persist.Persis
 }
 
 func (ms *MenuStorageService) GetUserdataDb(ctx context.Context) (db.Db, error) {
-	if ms.userDataStore != nil {
-		return ms.userDataStore, nil
-	}
-
-	userDataStore, err := ms.getOrCreateDb(ctx, ms.userDataStore, "userdata.gdbm", "userdata")
-	if err != nil {
-		return nil, err
-	}
-
-	ms.userDataStore = userDataStore
-	return ms.userDataStore, nil
+	return ms.getOrCreateDb(ctx, "userdata.gdbm", STORETYPE_USER)
 }
 
 func (ms *MenuStorageService) GetResource(ctx context.Context) (resource.Resource, error) {
-	ms.resourceStore = fsdb.NewFsDb()
-	err := ms.resourceStore.Connect(ctx, ms.resourceDir)
+	store, err := ms.getOrCreateDb(ctx, "resource.gdbm", STORETYPE_RESOURCE)
 	if err != nil {
 		return nil, err
 	}
-	rfs := resource.NewDbResource(ms.resourceStore)
+	rfs := resource.NewDbResource(store)
 	if ms.poResource != nil {
 		logg.InfoCtxf(ctx, "using poresource for menu and template")
 		rfs.WithMenuGetter(ms.poResource.GetMenu)
@@ -174,34 +189,34 @@ func (ms *MenuStorageService) GetResource(ctx context.Context) (resource.Resourc
 }
 
 func (ms *MenuStorageService) GetStateStore(ctx context.Context) (db.Db, error) {
-	if ms.stateStore != nil {
-		return ms.stateStore, nil
-	}
-
-	stateStore, err := ms.getOrCreateDb(ctx, ms.stateStore, "state.gdbm", "state")
-	if err != nil {
-		return nil, err
-	}
-
-	ms.stateStore = stateStore
-	return ms.stateStore, nil
+	return ms.getOrCreateDb(ctx, "state.gdbm", STORETYPE_STATE)
 }
 
-func (ms *MenuStorageService) ensureDbDir() error {
-	err := os.MkdirAll(ms.conn.String(), 0700)
+func (ms *MenuStorageService) ensureDbDir(path string) error {
+	err := os.MkdirAll(path, 0700)
 	if err != nil {
-		return fmt.Errorf("state dir create exited with error: %v\n", err)
+		return fmt.Errorf("store dir create exited with error: %v\n", err)
 	}
 	return nil
 }
 
 // TODO: how to handle persister here?
 func (ms *MenuStorageService) Close(ctx context.Context) error {
-	errA := ms.stateStore.Close(ctx)
-	errB := ms.userDataStore.Close(ctx)
-	errC := ms.resourceStore.Close(ctx)
-	if errA != nil || errB != nil || errC != nil {
-		return fmt.Errorf("%v %v %v", errA, errB, errC)
+	var errs []error
+	var haveErr bool
+	for i := range(_STORETYPE_MAX) {
+		err := ms.store[int8(i)].Close(ctx)
+		if err != nil {
+			haveErr = true
+		}
+		errs = append(errs, err) 
+	}
+	if haveErr {
+		errStr := ""
+		for i, err := range(errs) {
+			errStr += fmt.Sprintf("(%d: %v)", i, err)
+		}
+		return errors.New(errStr)
 	}
 	return nil
 }

storage/storage_service_test.go

@@ -0,0 +1,113 @@
+package storage
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	fsdb "git.defalsify.org/vise.git/db/fs"
+)
+
+func TestMenuStorageServiceOneSet(t *testing.T) {
+	d, err := os.MkdirTemp("", "visedriver-menustorageservice")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(d)
+	conns := NewConns()
+	connData, err := ToConnData(d)
+	if err != nil {
+		t.Fatal(err)
+	}
+	conns.Set(STORETYPE_STATE, connData)
+
+	ctx := context.Background()
+	ms := NewMenuStorageService(conns)
+	_, err = ms.GetStateStore(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = ms.GetResource(ctx)
+	if err == nil {
+		t.Fatalf("expected error getting resource")
+	}
+	_, err = ms.GetUserdataDb(ctx)
+	if err == nil {
+		t.Fatalf("expected error getting userdata")
+	}
+}
+
+func TestMenuStorageServiceExplicit(t *testing.T) {
+	d, err := os.MkdirTemp("", "visedriver-menustorageservice")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(d)
+	conns := NewConns()
+	connData, err := ToConnData(d)
+	if err != nil {
+		t.Fatal(err)
+	}
+	conns.Set(STORETYPE_STATE, connData)
+
+	ctx := context.Background()
+	d, err = os.MkdirTemp("", "visedriver-menustorageservice")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(d)
+	store := fsdb.NewFsDb()
+	err = store.Connect(ctx, d)
+	if err != nil {
+		t.Fatal(err)
+	}
+	
+	ms := NewMenuStorageService(conns)
+	ms = ms.WithDb(store, STORETYPE_RESOURCE)
+	_, err = ms.GetStateStore(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = ms.GetResource(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = ms.GetUserdataDb(ctx)
+	if err == nil {
+		t.Fatalf("expected error getting userdata")
+	}
+
+}
+
+func TestMenuStorageServiceReuse(t *testing.T) {
+	d, err := os.MkdirTemp("", "visedriver-menustorageservice")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(d)
+	conns := NewConns()
+	connData, err := ToConnData(d)
+	if err != nil {
+		t.Fatal(err)
+	}
+	conns.Set(STORETYPE_STATE, connData)
+	conns.Set(STORETYPE_USER, connData)
+
+	ctx := context.Background()
+	ms := NewMenuStorageService(conns)
+	stateStore, err := ms.GetStateStore(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = ms.GetResource(ctx)
+	if err == nil {
+		t.Fatalf("expected error getting resource")
+	}
+	userStore, err := ms.GetUserdataDb(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if userStore != stateStore {
+		t.Fatalf("expected same store, but they are %p and %p", userStore, stateStore)
+	}
+}