73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
// Copyright 2018 PingCAP, Inc.
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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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package store
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import (
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"net/url"
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"strings"
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"github.com/pingcap/errors"
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"github.com/pingcap/tidb/kv"
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"github.com/pingcap/tidb/util"
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log "github.com/sirupsen/logrus"
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)
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var stores = make(map[string]kv.Driver)
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// Register registers a kv storage with unique name and its associated Driver.
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func Register(name string, driver kv.Driver) error {
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name = strings.ToLower(name)
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if _, ok := stores[name]; ok {
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return errors.Errorf("%s is already registered", name)
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}
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stores[name] = driver
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return nil
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}
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// New creates a kv Storage with path.
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//
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// The path must be a URL format 'engine://path?params' like the one for
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// session.Open() but with the dbname cut off.
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// Examples:
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// goleveldb://relative/path
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// boltdb:///absolute/path
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//
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// The engine should be registered before creating storage.
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func New(path string) (kv.Storage, error) {
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return newStoreWithRetry(path, util.DefaultMaxRetries)
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}
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func newStoreWithRetry(path string, maxRetries int) (kv.Storage, error) {
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storeURL, err := url.Parse(path)
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if err != nil {
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return nil, errors.Trace(err)
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}
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name := strings.ToLower(storeURL.Scheme)
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d, ok := stores[name]
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if !ok {
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return nil, errors.Errorf("invalid uri format, storage %s is not registered", name)
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}
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var s kv.Storage
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err = util.RunWithRetry(maxRetries, util.RetryInterval, func() (bool, error) {
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log.Infof("new store")
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s, err = d.Open(path)
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return kv.IsRetryableError(err), err
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})
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return s, errors.Trace(err)
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}
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