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// Copyright (c) 2015 Couchbase, Inc.
//
// 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 index
import (
"reflect"
"github.com/blevesearch/bleve/analysis"
"github.com/blevesearch/bleve/document"
"github.com/blevesearch/bleve/size"
)
var reflectStaticSizeAnalysisResult int
func init() {
var ar AnalysisResult
reflectStaticSizeAnalysisResult = int(reflect.TypeOf(ar).Size())
}
type IndexRow interface {
KeySize() int
KeyTo([]byte) (int, error)
Key() []byte
ValueSize() int
ValueTo([]byte) (int, error)
Value() []byte
}
type AnalysisResult struct {
DocID string
Rows []IndexRow
// scorch
Document *document.Document
Analyzed []analysis.TokenFrequencies
Length []int
}
func (a *AnalysisResult) Size() int {
rv := reflectStaticSizeAnalysisResult
for _, analyzedI := range a.Analyzed {
rv += analyzedI.Size()
}
rv += len(a.Length) * size.SizeOfInt
return rv
}
type AnalysisWork struct {
i Index
d *document.Document
rc chan *AnalysisResult
}
func NewAnalysisWork(i Index, d *document.Document, rc chan *AnalysisResult) *AnalysisWork {
return &AnalysisWork{
i: i,
d: d,
rc: rc,
}
}
type AnalysisQueue struct {
queue chan *AnalysisWork
done chan struct{}
}
func (q *AnalysisQueue) Queue(work *AnalysisWork) {
q.queue <- work
}
func (q *AnalysisQueue) Close() {
close(q.done)
}
func NewAnalysisQueue(numWorkers int) *AnalysisQueue {
rv := AnalysisQueue{
queue: make(chan *AnalysisWork),
done: make(chan struct{}),
}
for i := 0; i < numWorkers; i++ {
go AnalysisWorker(rv)
}
return &rv
}
func AnalysisWorker(q AnalysisQueue) {
// read work off the queue
for {
select {
case <-q.done:
return
case w := <-q.queue:
r := w.i.Analyze(w.d)
w.rc <- r
}
}
}
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