// Open opens a Cayley database, creating it if necessary and return its handle
func Open(dbType, dbPath string) error {
if store != nil {
log.Errorf("could not open database at %s : a database is already opened", dbPath)
return ErrCantOpen
}
var err error
// Try to create database if necessary
if dbType == "bolt" || dbType == "leveldb" {
if _, err := os.Stat(dbPath); os.IsNotExist(err) {
// No, initialize it if possible
log.Infof("database at %s does not exist yet, creating it", dbPath)
if err = graph.InitQuadStore(dbType, dbPath, nil); err != nil {
log.Errorf("could not create database at %s : %s", dbPath, err)
return ErrCantOpen
}
}
} else if dbType == "sql" {
graph.InitQuadStore(dbType, dbPath, nil)
}
store, err = cayley.NewGraph(dbType, dbPath, nil)
if err != nil {
log.Errorf("could not open database at %s : %s", dbPath, err)
return ErrCantOpen
}
return nil
}
func Init(cfg *config.Config) error {
if !graph.IsPersistent(cfg.DatabaseType) {
return fmt.Errorf("ignoring unproductive database initialization request: %v", ErrNotPersistent)
}
return graph.InitQuadStore(cfg.DatabaseType, cfg.DatabasePath, cfg.DatabaseOptions)
}
// Open opens a Cayley database, creating it if necessary and return its handle
func Open(config *config.DatabaseConfig) error {
if store != nil {
log.Errorf("could not open database at %s : a database is already opened", config.Path)
return ErrCantOpen
}
if config.Type != "memstore" && config.Path == "" {
log.Errorf("could not open database : no path provided.")
return ErrCantOpen
}
var err error
options := make(graph.Options)
switch config.Type {
case "bolt", "leveldb":
if _, err := os.Stat(config.Path); os.IsNotExist(err) {
log.Infof("database at %s does not exist yet, creating it", config.Path)
err = graph.InitQuadStore(config.Type, config.Path, options)
if err != nil && err != graph.ErrDatabaseExists {
log.Errorf("could not create database at %s : %s", config.Path, err)
return ErrCantOpen
}
}
case "sql":
// Replaces the PostgreSQL's slow COUNT query with a fast estimator.
// Ref: https://wiki.postgresql.org/wiki/Count_estimate
options["use_estimates"] = true
err := graph.InitQuadStore(config.Type, config.Path, options)
if err != nil && err != graph.ErrDatabaseExists {
log.Errorf("could not create database at %s : %s", config.Path, err)
return ErrCantOpen
}
}
store, err = cayley.NewGraph(config.Type, config.Path, options)
if err != nil {
log.Errorf("could not open database at %s : %s", config.Path, err)
return ErrCantOpen
}
return nil
}
func New(path string) Db {
db := Db{location: path}
graph.InitQuadStore("bolt", path, nil)
store, err := cayley.NewGraph("bolt", path, nil)
db.Store = *store
if err != nil {
log.Fatalln(err)
}
return db
}
func GetStorage() (s *Storage, err error) {
if storage == nil {
graph.InitQuadStore("bolt", BoltPath, nil)
var handle *cayley.Handle
handle, err = cayley.NewGraph("bolt", BoltPath, nil)
s = &Storage{handle}
storage = s
} else {
s = storage
}
return s, err
}
// Open opens a Cayley database, creating it if necessary and return its handle
func Open(dbType, dbPath string) error {
if store != nil {
log.Errorf("could not open database at %s : a database is already opened", dbPath)
return ErrCantOpen
}
var err error
options := make(graph.Options)
switch dbType {
case "bolt", "leveldb":
if _, err := os.Stat(dbPath); os.IsNotExist(err) {
log.Infof("database at %s does not exist yet, creating it", dbPath)
err = graph.InitQuadStore(dbType, dbPath, options)
if err != nil {
log.Errorf("could not create database at %s : %s", dbPath, err)
return ErrCantOpen
}
}
case "sql":
// Replaces the PostgreSQL's slow COUNT query with a fast estimator.
// See:
// Ref: https://wiki.postgresql.org/wiki/Count_estimate
options["use_estimates"] = true
graph.InitQuadStore(dbType, dbPath, options)
}
store, err = cayley.NewGraph(dbType, dbPath, options)
if err != nil {
log.Errorf("could not open database at %s : %s", dbPath, err)
return ErrCantOpen
}
return nil
}
func main() {
path := "/tmp/pc"
graph.InitQuadStore("bolt", path, nil)
m := martini.Classic()
unescapeFuncMap := template.FuncMap{"unescape": unescape}
m.Use(session.Middleware)
m.Use(render.Renderer(render.Options{
Directory: "templates", // Specify what path to load the templates from.
Layout: "layout", // Specify a layout template. Layouts can call {{ yield }} to render the current template.
Extensions: []string{".tmpl", ".html"}, // Specify extensions to load for templates.
Funcs: []template.FuncMap{unescapeFuncMap}, // Specify helper function maps for templates to access.
Charset: "UTF-8", // Sets encoding for json and html content-types. Default is "UTF-8".
IndentJSON: true, // Output human readable JSON
}))
storage, err := models.GetStorage()
if err != nil {
log.Fatalln(err)
}
server, err := server.NewServer(storage)
if err != nil {
log.Fatalln(err)
}
user := models.NewUser("admin")
user.Iteration()
staticOptions := martini.StaticOptions{Prefix: "assets"}
m.Use(martini.Static("assets", staticOptions))
m.Get("/", routes.IndexHandler)
m.Get("/login", routes.GetLoginHandler)
m.Get("/logout", routes.LogoutHandler)
m.Post("/login", routes.PostLoginHandler)
m.Get("/view:id", routes.ViewHandler)
m.Post("/gethtml", routes.GetHtmlHandler)
m.Get("/socket.io/", func(w http.ResponseWriter, rnd render.Render, r *http.Request, s *session.Session) {
server.SetSession(s)
server.ServeHTTP(w, r)
})
m.Run()
}
func open() {
path := "./db"
// Initialize the database
graph.InitQuadStore("bolt", path, nil)
// Open and use the database
store, err := cayley.NewGraph("bolt", path, nil)
if err != nil {
log.Fatalln(err)
}
p := cayley.StartPath(store, "").Out("type").Is("Person")
it := p.BuildIterator()
for cayley.RawNext(it) {
log.Println(store.NameOf(it.Result()))
}
}
func initDb() (*graph.NodeGraph, error) {
var handle *cayley.Handle
var err error
if !debug {
dbPath := filepath.Join(env.EnvPath(env.DbPath), "db.dat")
if !env.Exists(dbPath) {
if err = cgraph.InitQuadStore("bolt", dbPath, nil); err != nil {
return nil, err
}
}
if handle, err = cayley.NewGraph("bolt", dbPath, nil); err != nil {
return nil, err
}
} else {
if handle, err = cayley.NewMemoryGraph(); err != nil {
return nil, err
}
}
return graph.NewGraph(handle)
}
func open() {
path := "./db"
// Initialize the database
graph.InitQuadStore("bolt", path, nil)
// Open and use the database
store, err := cayley.NewGraph("bolt", path, nil)
if err != nil {
log.Fatalln(err)
}
store.AddQuad(cayley.Quad("person:sophie", "type", "Person", ""))
store.AddQuad(cayley.Quad("person:sophie", "name", "Sophie Grégoire", ""))
store.AddQuad(cayley.Quad("person:sophie", "born", "1974", ""))
store.AddQuad(cayley.Quad("person:sophie", "lives in", "country:canada", ""))
store.AddQuad(cayley.Quad("person:justin", "type", "Person", ""))
store.AddQuad(cayley.Quad("person:justin", "name", "Justin Trudeau", ""))
store.AddQuad(cayley.Quad("person:justin", "born", "1972", ""))
store.AddQuad(cayley.Quad("person:justin", "in love with", "person:sophie", ""))
}
func TestInit() (*graph.NodeGraph, string) {
if dir, err := ioutil.TempDir(os.TempDir(), ".olympus"); err != nil {
panic(err)
} else {
os.Setenv("OLYMPUS_HOME", dir)
if err = env.InitializeEnvironment(); err != nil {
panic(err)
}
dbPath := filepath.Join(env.EnvPath(env.DbPath), "db.dat")
if !env.Exists(dbPath) {
cgraph.InitQuadStore("bolt", dbPath, nil)
if handle, err := cayley.NewGraph("bolt", dbPath, nil); err != nil {
panic(err)
} else if ng, err := graph.NewGraph(handle); err != nil {
panic(err)
} else {
return ng, dir
}
} else {
return nil, ""
}
}
}
