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gitea/modules/queue/queue_disk.go

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2.4 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package queue
import (
"gitea.com/lunny/levelqueue"
)
// LevelQueueType is the type for level queue
const LevelQueueType Type = "level"
// LevelQueueConfiguration is the configuration for a LevelQueue
type LevelQueueConfiguration struct {
ByteFIFOQueueConfiguration
DataDir string
}
// LevelQueue implements a disk library queue
type LevelQueue struct {
*ByteFIFOQueue
}
// NewLevelQueue creates a ledis local queue
func NewLevelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
configInterface, err := toConfig(LevelQueueConfiguration{}, cfg)
if err != nil {
return nil, err
}
config := configInterface.(LevelQueueConfiguration)
byteFIFO, err := NewLevelQueueByteFIFO(config.DataDir)
if err != nil {
return nil, err
}
byteFIFOQueue, err := NewByteFIFOQueue(LevelQueueType, byteFIFO, handle, config.ByteFIFOQueueConfiguration, exemplar)
if err != nil {
return nil, err
}
queue := &LevelQueue{
ByteFIFOQueue: byteFIFOQueue,
}
queue.qid = GetManager().Add(queue, LevelQueueType, config, exemplar)
return queue, nil
}
var _ (ByteFIFO) = &LevelQueueByteFIFO{}
// LevelQueueByteFIFO represents a ByteFIFO formed from a LevelQueue
type LevelQueueByteFIFO struct {
internal *levelqueue.Queue
}
// NewLevelQueueByteFIFO creates a ByteFIFO formed from a LevelQueue
func NewLevelQueueByteFIFO(dataDir string) (*LevelQueueByteFIFO, error) {
internal, err := levelqueue.Open(dataDir)
if err != nil {
return nil, err
}
return &LevelQueueByteFIFO{
internal: internal,
}, nil
}
// PushFunc will push data into the fifo
func (fifo *LevelQueueByteFIFO) PushFunc(data []byte, fn func() error) error {
if fn != nil {
if err := fn(); err != nil {
return err
}
}
return fifo.internal.LPush(data)
}
// Pop pops data from the start of the fifo
func (fifo *LevelQueueByteFIFO) Pop() ([]byte, error) {
data, err := fifo.internal.RPop()
if err != nil && err != levelqueue.ErrNotFound {
return nil, err
}
return data, nil
}
// Close this fifo
func (fifo *LevelQueueByteFIFO) Close() error {
return fifo.internal.Close()
}
// Len returns the length of the fifo
func (fifo *LevelQueueByteFIFO) Len() int64 {
return fifo.internal.Len()
}
func init() {
queuesMap[LevelQueueType] = NewLevelQueue
}