mirror of https://github.com/perkeep/perkeep.git
93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
/*
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Copyright 2013 The Camlistore AUTHORS
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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// Package stats contains an in-memory StatReceiver that only stores sizes
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// of received blobs but not their contents.
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package stats
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import (
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"io"
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"io/ioutil"
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"sort"
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"sync"
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"camlistore.org/pkg/blob"
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)
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// Receiver is a dummy blobserver.StatReceiver that doesn't
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// store anything; it just collects statistics.
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//
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// TODO: we have another copy of this same type in
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// camput/files.go. move them to a common place? well, the camput one
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// is probably going away at some point.
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type Receiver struct {
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sync.Mutex // guards Have
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Have map[blob.Ref]int64
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}
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func (sr *Receiver) NumBlobs() int {
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sr.Lock()
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defer sr.Unlock()
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return len(sr.Have)
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}
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// Sizes returns the sorted blob sizes.
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func (sr *Receiver) Sizes() []int {
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sr.Lock()
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defer sr.Unlock()
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sizes := make([]int, 0, len(sr.Have))
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for _, size := range sr.Have {
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sizes = append(sizes, int(size))
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}
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sort.Ints(sizes)
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return sizes
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}
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func (sr *Receiver) SumBlobSize() int64 {
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sr.Lock()
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defer sr.Unlock()
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var sum int64
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for _, v := range sr.Have {
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sum += v
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}
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return sum
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}
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func (sr *Receiver) ReceiveBlob(br blob.Ref, source io.Reader) (sb blob.SizedRef, err error) {
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n, err := io.Copy(ioutil.Discard, source)
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if err != nil {
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return
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}
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sr.Lock()
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defer sr.Unlock()
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if sr.Have == nil {
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sr.Have = make(map[blob.Ref]int64)
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}
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sr.Have[br] = n
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return blob.SizedRef{br, n}, nil
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}
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func (sr *Receiver) StatBlobs(dest chan<- blob.SizedRef, blobs []blob.Ref) error {
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sr.Lock()
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defer sr.Unlock()
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for _, br := range blobs {
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if size, ok := sr.Have[br]; ok {
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dest <- blob.SizedRef{br, size}
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}
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}
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return nil
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}
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