63 lines
986 B
Go
63 lines
986 B
Go
// Package buffer provides a simple ring buffer
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package buffer
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import (
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"sync"
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"github.com/micro/go-micro/debug/store"
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)
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type Buffer struct {
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sync.RWMutex
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index map[string]int
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records []*store.Record
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}
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func (b *Buffer) Read(opts ...store.ReadOption) ([]*store.Record, error) {
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var options store.ReadOptions
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for _, o := range opts {
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o(&options)
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}
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b.RLock()
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defer b.RUnlock()
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if len(options.Id) > 0 {
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idx, ok := b.index[options.Id]
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if !ok || len(b.records) < idx {
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return nil, store.ErrNotFound
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}
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return []*store.Record{b.records[idx]}, nil
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}
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return b.records, nil
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}
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func (b *Buffer) Write(records []*store.Record) error {
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b.Lock()
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defer b.Unlock()
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if b.index == nil {
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b.index = make(map[string]int)
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}
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i := len(b.records)
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for _, r := range records {
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b.index[r.Id] = i
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i++
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b.records = append(b.records, r)
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}
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return nil
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}
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func (b *Buffer) String() string {
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return "buffer"
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}
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type Record struct {
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Id string
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Value interface{}
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}
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