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261111e728
The items will be saved per target batch and will be committed to the queue store when the batch is full Also, periodically commit the batched items to the queue store based on configured commit_timeout; default is 30s; Bonus: compress queue store multi writes
141 lines
2.9 KiB
Go
141 lines
2.9 KiB
Go
// Copyright (c) 2023 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package store
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import (
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"context"
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"errors"
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"sync"
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"time"
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)
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// ErrBatchFull indicates that the batch is full
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var ErrBatchFull = errors.New("batch is full")
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const defaultCommitTimeout = 30 * time.Second
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// Batch represents an ordered batch
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type Batch[I any] struct {
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items []I
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limit uint32
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store Store[I]
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quitCh chan struct{}
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sync.Mutex
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}
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// BatchConfig represents the batch config
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type BatchConfig[I any] struct {
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Limit uint32
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Store Store[I]
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CommitTimeout time.Duration
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Log logger
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}
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// Add adds the item to the batch
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func (b *Batch[I]) Add(item I) error {
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b.Lock()
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defer b.Unlock()
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if b.isFull() {
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if b.store == nil {
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return ErrBatchFull
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}
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// commit batch to store
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if err := b.commit(); err != nil {
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return err
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}
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}
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b.items = append(b.items, item)
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return nil
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}
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// Len returns the no of items in the batch
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func (b *Batch[_]) Len() int {
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b.Lock()
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defer b.Unlock()
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return len(b.items)
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}
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func (b *Batch[_]) isFull() bool {
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return len(b.items) >= int(b.limit)
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}
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func (b *Batch[I]) commit() error {
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switch len(b.items) {
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case 0:
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return nil
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case 1:
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_, err := b.store.Put(b.items[0])
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return err
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default:
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}
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if _, err := b.store.PutMultiple(b.items); err != nil {
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return err
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}
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b.items = make([]I, 0, b.limit)
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return nil
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}
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// Close commits the pending items and quits the goroutines
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func (b *Batch[I]) Close() error {
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defer func() {
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close(b.quitCh)
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}()
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b.Lock()
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defer b.Unlock()
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return b.commit()
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}
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// NewBatch creates a new batch
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func NewBatch[I any](config BatchConfig[I]) *Batch[I] {
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if config.CommitTimeout == 0 {
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config.CommitTimeout = defaultCommitTimeout
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}
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quitCh := make(chan struct{})
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batch := &Batch[I]{
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items: make([]I, 0, config.Limit),
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limit: config.Limit,
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store: config.Store,
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quitCh: quitCh,
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}
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if batch.store != nil {
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go func() {
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commitTicker := time.NewTicker(config.CommitTimeout)
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defer commitTicker.Stop()
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for {
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select {
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case <-commitTicker.C:
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case <-batch.quitCh:
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return
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}
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batch.Lock()
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err := batch.commit()
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batch.Unlock()
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if err != nil {
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config.Log(context.Background(), err, "")
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}
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}
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}()
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}
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return batch
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}
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