Golang registry.KVStoreConstructorByName函數代碼示例

func newIndex(path string, mapping *IndexMapping) (*indexImpl, error) {
	// first validate the mapping
	err := mapping.validate()
	if err != nil {
		return nil, err
	}

	if path == "" {
		return newMemIndex(mapping)
	}

	rv := indexImpl{
		path: path,
		m:    mapping,
		meta: newIndexMeta(Config.DefaultKVStore),
	}
	storeConstructor := registry.KVStoreConstructorByName(rv.meta.Storage)
	if storeConstructor == nil {
		return nil, ErrorUnknownStorageType
	}
	// at this point there hope we can be successful, so save index meta
	err = rv.meta.Save(path)
	if err != nil {
		return nil, err
	}
	storeConfig := map[string]interface{}{
		"path":              indexStorePath(path),
		"create_if_missing": true,
		"error_if_exists":   true,
	}

	// now open the store
	rv.s, err = storeConstructor(storeConfig)
	if err != nil {
		return nil, err
	}

	// open open the index
	rv.i = upside_down.NewUpsideDownCouch(rv.s)
	err = rv.i.Open()
	if err != nil {
		return nil, err
	}

	// now persist the mapping
	mappingBytes, err := json.Marshal(mapping)
	if err != nil {
		return nil, err
	}
	err = rv.i.SetInternal(mappingInternalKey, mappingBytes)
	if err != nil {
		return nil, err
	}

	// mark the index as open
	rv.mutex.Lock()
	defer rv.mutex.Unlock()
	rv.open = true
	return &rv, nil
}

func NewBlevePIndexImpl(indexType, indexParams, path string,
	restart func()) (cbgt.PIndexImpl, cbgt.Dest, error) {
	bleveParams := NewBleveParams()
	if len(indexParams) > 0 {
		err := json.Unmarshal([]byte(indexParams), bleveParams)
		if err != nil {
			return nil, nil, fmt.Errorf("bleve: parse params, err: %v", err)
		}
	}

	kvStoreName, ok := bleveParams.Store["kvStoreName"].(string)
	if !ok || kvStoreName == "" {
		kvStoreName = bleve.Config.DefaultKVStore
	}

	kvConfig := map[string]interface{}{
		"create_if_missing": true,
		"error_if_exists":   true,
	}
	for k, v := range bleveParams.Store {
		kvConfig[k] = v
	}

	// Always use the "metrics" wrapper KVStore if it's available and
	// also not already configured.
	_, exists := kvConfig["kvStoreName_actual"]
	if !exists &&
		kvStoreName != "metrics" &&
		bleveRegistry.KVStoreConstructorByName("metrics") != nil {
		kvConfig["kvStoreName_actual"] = kvStoreName
		kvStoreName = "metrics"
	}

	bleveIndexType, ok := bleveParams.Store["indexType"].(string)
	if !ok || bleveIndexType == "" {
		bleveIndexType = bleve.Config.DefaultIndexType
	}

	bindex, err := bleve.NewUsing(path, &bleveParams.Mapping,
		bleveIndexType, kvStoreName, kvConfig)
	if err != nil {
		return nil, nil, fmt.Errorf("bleve: new index, path: %s,"+
			" kvStoreName: %s, kvConfig: %#v, err: %s",
			path, kvStoreName, kvConfig, err)
	}

	pathMeta := path + string(os.PathSeparator) + "PINDEX_BLEVE_META"
	err = ioutil.WriteFile(pathMeta, []byte(indexParams), 0600)
	if err != nil {
		return nil, nil, err
	}

	return bindex, &cbgt.DestForwarder{
		DestProvider: NewBleveDest(path, bindex, restart),
	}, nil
}

func initLowerLevelStore(
	config map[string]interface{},
	lowerLevelStoreName string,
	lowerLevelStoreConfig map[string]interface{},
	lowerLevelMaxBatchSize uint64,
	options moss.CollectionOptions,
) (moss.Snapshot, moss.LowerLevelUpdate, store.KVStore, error) {
	if lowerLevelStoreConfig == nil {
		lowerLevelStoreConfig = map[string]interface{}{}
	}

	for k, v := range config {
		_, exists := lowerLevelStoreConfig[k]
		if !exists {
			lowerLevelStoreConfig[k] = v
		}
	}

	if lowerLevelStoreName == "mossStore" {
		return InitMossStore(lowerLevelStoreConfig, options)
	}

	constructor := registry.KVStoreConstructorByName(lowerLevelStoreName)
	if constructor == nil {
		return nil, nil, nil, fmt.Errorf("moss store, initLowerLevelStore,"+
			" could not find lower level store: %s", lowerLevelStoreName)
	}

	kvStore, err := constructor(options.MergeOperator, lowerLevelStoreConfig)
	if err != nil {
		return nil, nil, nil, err
	}

	llStore := &llStore{
		refs:     0,
		config:   config,
		llConfig: lowerLevelStoreConfig,
		kvStore:  kvStore,
		logf:     options.Log,
	}

	llUpdate := func(ssHigher moss.Snapshot) (ssLower moss.Snapshot, err error) {
		return llStore.update(ssHigher, lowerLevelMaxBatchSize)
	}

	llSnapshot, err := llUpdate(nil)
	if err != nil {
		_ = kvStore.Close()
		return nil, nil, nil, err
	}

	return llSnapshot, llUpdate, kvStore, nil // llStore.refs is now 1.
}

func newMemIndex(indexType string, mapping *IndexMapping) (*indexImpl, error) {
	rv := indexImpl{
		path:  "",
		m:     mapping,
		meta:  newIndexMeta(indexType, "mem", nil),
		stats: &IndexStat{},
	}

	storeConstructor := registry.KVStoreConstructorByName(rv.meta.Storage)
	if storeConstructor == nil {
		return nil, ErrorUnknownStorageType
	}
	// now open the store
	var err error
	rv.s, err = storeConstructor(nil)
	if err != nil {
		return nil, err
	}

	// open the index
	indexTypeConstructor := registry.IndexTypeConstructorByName(rv.meta.IndexType)
	if indexTypeConstructor == nil {
		return nil, ErrorUnknownIndexType
	}

	rv.i, err = indexTypeConstructor(rv.s, Config.analysisQueue)
	if err != nil {
		return nil, err
	}
	err = rv.i.Open()
	if err != nil {
		return nil, err
	}
	rv.stats.indexStat = rv.i.Stats()

	// now persist the mapping
	mappingBytes, err := json.Marshal(mapping)
	if err != nil {
		return nil, err
	}
	err = rv.i.SetInternal(mappingInternalKey, mappingBytes)
	if err != nil {
		return nil, err
	}

	// mark the index as open
	rv.mutex.Lock()
	defer rv.mutex.Unlock()
	rv.open = true
	return &rv, nil
}

func New(mo store.MergeOperator, config map[string]interface{}) (store.KVStore, error) {
	name, ok := config["kvStoreName_actual"].(string)
	if !ok || name == "" {
		return nil, fmt.Errorf("preload: missing kvStoreName_actual,"+
			" config: %#v", config)
	}

	if name == Name {
		return nil, fmt.Errorf("preload: circular kvStoreName_actual")
	}

	ctr := registry.KVStoreConstructorByName(name)
	if ctr == nil {
		return nil, fmt.Errorf("preload: no kv store constructor,"+
			" kvStoreName_actual: %s", name)
	}

	kvs, err := ctr(mo, config)
	if err != nil {
		return nil, err
	}

	rv := &Store{
		o: kvs,
	}

	if preloadPath, ok := config["preloadpath"].(string); ok {
		f, err := os.Open(preloadPath)
		if err != nil {
			return nil, err
		}
		gzr, err := gzip.NewReader(f)
		if err != nil {
			return nil, err
		}
		err = Import(rv, gzr, 1024)
		if err != nil {
			return nil, err
		}
		err = gzr.Close()
		if err != nil {
			return nil, err
		}
		err = f.Close()
		if err != nil {
			return nil, err
		}
	}

	return rv, nil
}

func New(mo store.MergeOperator, config map[string]interface{}) (store.KVStore, error) {

	name, ok := config["kvStoreName_actual"].(string)
	if !ok || name == "" {
		return nil, fmt.Errorf("metrics: missing kvStoreName_actual,"+
			" config: %#v", config)
	}

	if name == Name {
		return nil, fmt.Errorf("metrics: circular kvStoreName_actual")
	}

	ctr := registry.KVStoreConstructorByName(name)
	if ctr == nil {
		return nil, fmt.Errorf("metrics: no kv store constructor,"+
			" kvStoreName_actual: %s", name)
	}

	kvs, err := ctr(mo, config)
	if err != nil {
		return nil, err
	}

	rv := &Store{
		o: kvs,

		timerReaderGet:            metrics.NewTimer(),
		timerReaderMultiGet:       metrics.NewTimer(),
		timerReaderPrefixIterator: metrics.NewTimer(),
		timerReaderRangeIterator:  metrics.NewTimer(),
		timerWriterExecuteBatch:   metrics.NewTimer(),
		timerIteratorSeek:         metrics.NewTimer(),
		timerIteratorNext:         metrics.NewTimer(),
		timerBatchMerge:           metrics.NewTimer(),

		errors: list.New(),
	}

	rv.s = &stats{s: rv}

	return rv, nil
}

func newMemIndex(mapping *IndexMapping) (*indexImpl, error) {
	rv := indexImpl{
		path: "",
		m:    mapping,
		meta: newIndexMeta("mem"),
	}

	storeConstructor := registry.KVStoreConstructorByName(rv.meta.Storage)
	if storeConstructor == nil {
		return nil, ErrorUnknownStorageType
	}
	// now open the store
	var err error
	rv.s, err = storeConstructor(nil)
	if err != nil {
		return nil, err
	}

	// open open the index
	rv.i = upside_down.NewUpsideDownCouch(rv.s)
	err = rv.i.Open()
	if err != nil {
		return nil, err
	}

	// now persist the mapping
	mappingBytes, err := json.Marshal(mapping)
	if err != nil {
		return nil, err
	}
	err = rv.i.SetInternal(mappingInternalKey, mappingBytes)
	if err != nil {
		return nil, err
	}

	// mark the index as open
	rv.mutex.Lock()
	defer rv.mutex.Unlock()
	rv.open = true
	return &rv, nil
}

func StoreConstructor(config map[string]interface{}) (store.KVStore, error) {
	name, ok := config["kvStoreName_actual"].(string)
	if !ok || name == "" {
		return nil, fmt.Errorf("metrics: missing kvStoreName_actual,"+
			" config: %#v", config)
	}

	if name == Name {
		return nil, fmt.Errorf("metrics: circular kvStoreName_actual")
	}

	ctr := registry.KVStoreConstructorByName(name)
	if ctr == nil {
		return nil, fmt.Errorf("metrics: no kv store constructor,"+
			" kvStoreName_actual: %s", name)
	}

	kvs, err := ctr(config)
	if err != nil {
		return nil, err
	}

	return NewBleveMetricsStore(kvs), nil
}

func newIndexUsing(path string, mapping *IndexMapping, indexType string, kvstore string, kvconfig map[string]interface{}) (*indexImpl, error) {
	// first validate the mapping
	err := mapping.validate()
	if err != nil {
		return nil, err
	}

	if path == "" {
		return newMemIndex(indexType, mapping)
	}

	if kvconfig == nil {
		kvconfig = map[string]interface{}{}
	}

	rv := indexImpl{
		path:  path,
		m:     mapping,
		meta:  newIndexMeta(indexType, kvstore, kvconfig),
		stats: &IndexStat{},
	}
	storeConstructor := registry.KVStoreConstructorByName(rv.meta.Storage)
	if storeConstructor == nil {
		return nil, ErrorUnknownStorageType
	}
	// at this point there is hope that we can be successful, so save index meta
	err = rv.meta.Save(path)
	if err != nil {
		return nil, err
	}
	kvconfig["create_if_missing"] = true
	kvconfig["error_if_exists"] = true
	kvconfig["path"] = indexStorePath(path)

	// now create the store
	rv.s, err = storeConstructor(kvconfig)
	if err != nil {
		return nil, err
	}

	// open the index
	indexTypeConstructor := registry.IndexTypeConstructorByName(rv.meta.IndexType)
	if indexTypeConstructor == nil {
		return nil, ErrorUnknownIndexType
	}

	rv.i, err = indexTypeConstructor(rv.s, Config.analysisQueue)
	if err != nil {
		return nil, err
	}
	err = rv.i.Open()
	if err != nil {
		return nil, err
	}
	rv.stats.indexStat = rv.i.Stats()

	// now persist the mapping
	mappingBytes, err := json.Marshal(mapping)
	if err != nil {
		return nil, err
	}
	err = rv.i.SetInternal(mappingInternalKey, mappingBytes)
	if err != nil {
		return nil, err
	}

	// mark the index as open
	rv.mutex.Lock()
	defer rv.mutex.Unlock()
	rv.open = true
	return &rv, nil
}

func openIndexUsing(path string, runtimeConfig map[string]interface{}) (rv *indexImpl, err error) {

	rv = &indexImpl{
		path:  path,
		stats: &IndexStat{},
	}

	rv.meta, err = openIndexMeta(path)
	if err != nil {
		return nil, err
	}

	storeConstructor := registry.KVStoreConstructorByName(rv.meta.Storage)
	if storeConstructor == nil {
		return nil, ErrorUnknownStorageType
	}

	storeConfig := rv.meta.Config
	if storeConfig == nil {
		storeConfig = map[string]interface{}{}
	}

	storeConfig["path"] = indexStorePath(path)
	storeConfig["create_if_missing"] = false
	storeConfig["error_if_exists"] = false
	for rck, rcv := range runtimeConfig {
		storeConfig[rck] = rcv
	}

	// now open the store
	rv.s, err = storeConstructor(storeConfig)
	if err != nil {
		return nil, err
	}

	// open the index
	indexTypeConstructor := registry.IndexTypeConstructorByName(rv.meta.IndexType)
	if indexTypeConstructor == nil {
		return nil, ErrorUnknownIndexType
	}

	rv.i, err = indexTypeConstructor(rv.s, Config.analysisQueue)
	if err != nil {
		return nil, err
	}
	err = rv.i.Open()
	if err != nil {
		return nil, err
	}
	rv.stats.indexStat = rv.i.Stats()

	// now load the mapping
	indexReader, err := rv.i.Reader()
	if err != nil {
		return nil, err
	}
	defer func() {
		if cerr := indexReader.Close(); cerr != nil && err == nil {
			err = cerr
		}
	}()

	mappingBytes, err := indexReader.GetInternal(mappingInternalKey)
	if err != nil {
		return nil, err
	}

	var im IndexMapping
	err = json.Unmarshal(mappingBytes, &im)
	if err != nil {
		return nil, err
	}

	// mark the index as open
	rv.mutex.Lock()
	defer rv.mutex.Unlock()
	rv.open = true

	// validate the mapping
	err = im.validate()
	if err != nil {
		// note even if the mapping is invalid
		// we still return an open usable index
		return rv, err
	}

	rv.m = &im
	return rv, err
}

func (f *Firestorm) Open() (err error) {

	// open the kv store
	storeConstructor := registry.KVStoreConstructorByName(f.storeName)
	if storeConstructor == nil {
		err = index.ErrorUnknownStorageType
		return
	}

	// now open the store
	f.store, err = storeConstructor(&mergeOperator, f.storeConfig)
	if err != nil {
		return
	}

	// start a reader
	var kvreader store.KVReader
	kvreader, err = f.store.Reader()
	if err != nil {
		return
	}

	// assert correct version, and find out if this is new index
	var newIndex bool
	newIndex, err = f.checkVersion(kvreader)
	if err != nil {
		return
	}

	if !newIndex {
		// process existing index before opening
		err = f.warmup(kvreader)
		if err != nil {
			return
		}
	}

	err = kvreader.Close()
	if err != nil {
		return
	}

	if newIndex {
		// prepare a new index
		err = f.bootstrap()
		if err != nil {
			return
		}
	}

	// start the garbage collector
	f.garbageCollector.Start()

	// start the lookuper
	f.lookuper.Start()

	// start the dict updater
	f.dictUpdater.Start()

	return
}

func openIndex(path string) (*indexImpl, error) {

	rv := indexImpl{
		path: path,
	}
	var err error
	rv.meta, err = openIndexMeta(path)
	if err != nil {
		return nil, err
	}

	storeConstructor := registry.KVStoreConstructorByName(rv.meta.Storage)
	if storeConstructor == nil {
		return nil, ErrorUnknownStorageType
	}

	storeConfig := map[string]interface{}{
		"path":              indexStorePath(path),
		"create_if_missing": false,
		"error_if_exists":   false,
	}

	// now open the store
	rv.s, err = storeConstructor(storeConfig)
	if err != nil {
		return nil, err
	}

	// open open the index
	rv.i = upside_down.NewUpsideDownCouch(rv.s)
	err = rv.i.Open()
	if err != nil {
		return nil, err
	}

	// now load the mapping
	indexReader := rv.i.Reader()
	defer indexReader.Close()
	mappingBytes, err := indexReader.GetInternal(mappingInternalKey)
	if err != nil {
		return nil, err
	}

	var im IndexMapping
	err = json.Unmarshal(mappingBytes, &im)
	if err != nil {
		return nil, err
	}

	// mark the index as open
	rv.mutex.Lock()
	defer rv.mutex.Unlock()
	rv.open = true

	// validate the mapping
	err = im.validate()
	if err != nil {
		// note even if the mapping is invalid
		// we still return an open usable index
		return &rv, err
	}

	rv.m = &im
	return &rv, nil
}

func (udc *SmolderingCouch) Open() (err error) {
	//acquire the write mutex for the duratin of Open()
	udc.writeMutex.Lock()
	defer udc.writeMutex.Unlock()

	// open the kv store
	storeConstructor := registry.KVStoreConstructorByName(udc.storeName)
	if storeConstructor == nil {
		err = index.ErrorUnknownStorageType
		return
	}

	// now open the store
	udc.store, err = storeConstructor(&mergeOperator, udc.storeConfig)
	if err != nil {
		return
	}

	udc.cf = cuckoofilter.NewDefaultCuckooFilter()

	// start a reader to look at the index
	var kvreader store.KVReader
	kvreader, err = udc.store.Reader()
	if err != nil {
		return
	}

	var value []byte
	value, err = kvreader.Get(VersionKey)
	if err != nil {
		_ = kvreader.Close()
		return
	}

	if value != nil {
		err = udc.loadSchema(kvreader)
		if err != nil {
			_ = kvreader.Close()
			return
		}

		// set doc count
		udc.m.Lock()
		udc.docCount, udc.maxInternalDocID, err = udc.countDocs(kvreader)
		udc.m.Unlock()

		err = kvreader.Close()
	} else {
		// new index, close the reader and open writer to init
		err = kvreader.Close()
		if err != nil {
			return
		}

		var kvwriter store.KVWriter
		kvwriter, err = udc.store.Writer()
		if err != nil {
			return
		}
		defer func() {
			if cerr := kvwriter.Close(); err == nil && cerr != nil {
				err = cerr
			}
		}()

		// init the index
		err = udc.init(kvwriter)
	}

	return
}