e00577f265
previously we just used a Go builtin map this was not safe for concurrent read/write and upon upgrading to Go 1.6 we were notified of the problem fixes #349
86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed under the
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// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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package registry
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import (
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"fmt"
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"github.com/blevesearch/bleve/analysis"
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)
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func RegisterAnalyzer(name string, constructor AnalyzerConstructor) {
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_, exists := analyzers[name]
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if exists {
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panic(fmt.Errorf("attempted to register duplicate analyzer named '%s'", name))
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}
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analyzers[name] = constructor
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}
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type AnalyzerConstructor func(config map[string]interface{}, cache *Cache) (*analysis.Analyzer, error)
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type AnalyzerRegistry map[string]AnalyzerConstructor
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type AnalyzerCache struct {
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*ConcurrentCache
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}
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func NewAnalyzerCache() *AnalyzerCache {
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return &AnalyzerCache{
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NewConcurrentCache(),
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}
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}
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func AnalyzerBuild(name string, config map[string]interface{}, cache *Cache) (interface{}, error) {
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cons, registered := analyzers[name]
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if !registered {
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return nil, fmt.Errorf("no analyzer with name or type '%s' registered", name)
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}
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analyzer, err := cons(config, cache)
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if err != nil {
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return nil, fmt.Errorf("error building analyzer: %v", err)
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}
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return analyzer, nil
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}
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func (c *AnalyzerCache) AnalyzerNamed(name string, cache *Cache) (*analysis.Analyzer, error) {
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item, err := c.ItemNamed(name, cache, AnalyzerBuild)
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if err != nil {
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return nil, err
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}
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return item.(*analysis.Analyzer), nil
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}
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func (c *AnalyzerCache) DefineAnalyzer(name string, typ string, config map[string]interface{}, cache *Cache) (*analysis.Analyzer, error) {
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item, err := c.DefineItem(name, typ, config, cache, AnalyzerBuild)
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if err != nil {
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if err == ErrAlreadyDefined {
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return nil, fmt.Errorf("analyzer named '%s' already defined", name)
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} else {
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return nil, err
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}
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}
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return item.(*analysis.Analyzer), nil
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}
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func AnalyzerTypesAndInstances() ([]string, []string) {
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emptyConfig := map[string]interface{}{}
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emptyCache := NewCache()
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types := make([]string, 0)
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instances := make([]string, 0)
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for name, cons := range analyzers {
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_, err := cons(emptyConfig, emptyCache)
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if err == nil {
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instances = append(instances, name)
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} else {
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types = append(types, name)
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}
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}
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return types, instances
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}
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