088e73a163
The functions are too small to justify a single file each. The repl file is left out as semantically unrelated.
80 lines
2 KiB
Go
80 lines
2 KiB
Go
// Copyright 2014 The Cayley Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package db
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import (
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"errors"
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"fmt"
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"io"
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"github.com/barakmich/glog"
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"github.com/google/cayley/config"
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"github.com/google/cayley/graph"
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"github.com/google/cayley/quad"
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)
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var ErrNotPersistent = errors.New("database type is not persistent")
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func Init(cfg *config.Config) error {
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if !graph.IsPersistent(cfg.DatabaseType) {
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return fmt.Errorf("ignoring unproductive database initialization request: %v", ErrNotPersistent)
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}
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return graph.InitTripleStore(cfg.DatabaseType, cfg.DatabasePath, cfg.DatabaseOptions)
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}
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func Open(cfg *config.Config) (graph.TripleStore, error) {
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glog.Infof("Opening database %q at %s", cfg.DatabaseType, cfg.DatabasePath)
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ts, err := graph.NewTripleStore(cfg.DatabaseType, cfg.DatabasePath, cfg.DatabaseOptions)
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if err != nil {
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return nil, err
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}
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return ts, nil
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}
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func Load(ts graph.TripleStore, cfg *config.Config, dec quad.Unmarshaler) error {
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bulker, canBulk := ts.(graph.BulkLoader)
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if canBulk {
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switch err := bulker.BulkLoad(dec); err {
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case nil:
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return nil
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case graph.ErrCannotBulkLoad:
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// Try individual loading.
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default:
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return err
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}
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}
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block := make([]quad.Quad, 0, cfg.LoadSize)
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for {
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t, err := dec.Unmarshal()
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if err != nil {
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if err == io.EOF {
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break
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}
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return err
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}
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block = append(block, t)
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if len(block) == cap(block) {
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ts.AddTripleSet(block)
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block = block[:0]
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}
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}
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ts.AddTripleSet(block)
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return nil
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}
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