Reorganise to make cmd code more prominant

db/open.go

@@ -0,0 +1,40 @@
+// Copyright 2014 The Cayley Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package db
+
+import (
+	"github.com/barakmich/glog"
+
+	"github.com/google/cayley/config"
+	"github.com/google/cayley/graph"
+	"github.com/google/cayley/graph/leveldb"
+	"github.com/google/cayley/graph/memstore"
+	"github.com/google/cayley/graph/mongo"
+)
+
+func OpenTSFromConfig(cfg *config.CayleyConfig) graph.TripleStore {
+	glog.Infof("Opening database \"%s\" at %s", cfg.DatabaseType, cfg.DatabasePath)
+	switch cfg.DatabaseType {
+	case "mongo", "mongodb":
+		return mongo.NewMongoTripleStore(cfg.DatabasePath, cfg.DatabaseOptions)
+	case "leveldb":
+		return leveldb.NewDefaultLevelDBTripleStore(cfg.DatabasePath, cfg.DatabaseOptions)
+	case "mem":
+		ts := memstore.NewMemTripleStore()
+		CayleyLoad(ts, cfg, cfg.DatabasePath, true)
+		return ts
+	}
+	panic("Unsupported database backend " + cfg.DatabaseType)
+}