142 lines
3.7 KiB
Go
142 lines
3.7 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package queue
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import (
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"context"
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"github.com/go-redis/redis/v8"
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)
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// RedisUniqueQueueType is the type for redis queue
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const RedisUniqueQueueType Type = "unique-redis"
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// RedisUniqueQueue redis queue
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type RedisUniqueQueue struct {
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*ByteFIFOUniqueQueue
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}
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// RedisUniqueQueueConfiguration is the configuration for the redis queue
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type RedisUniqueQueueConfiguration struct {
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ByteFIFOQueueConfiguration
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RedisUniqueByteFIFOConfiguration
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}
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// NewRedisUniqueQueue creates single redis or cluster redis queue.
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//
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// Please note that this Queue does not guarantee that a particular
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// task cannot be processed twice or more at the same time. Uniqueness is
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// only guaranteed whilst the task is waiting in the queue.
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func NewRedisUniqueQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
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configInterface, err := toConfig(RedisUniqueQueueConfiguration{}, cfg)
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if err != nil {
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return nil, err
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}
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config := configInterface.(RedisUniqueQueueConfiguration)
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byteFIFO, err := NewRedisUniqueByteFIFO(config.RedisUniqueByteFIFOConfiguration)
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if err != nil {
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return nil, err
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}
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if len(byteFIFO.setName) == 0 {
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byteFIFO.setName = byteFIFO.queueName + "_unique"
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}
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byteFIFOQueue, err := NewByteFIFOUniqueQueue(RedisUniqueQueueType, byteFIFO, handle, config.ByteFIFOQueueConfiguration, exemplar)
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if err != nil {
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return nil, err
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}
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queue := &RedisUniqueQueue{
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ByteFIFOUniqueQueue: byteFIFOQueue,
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}
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queue.qid = GetManager().Add(queue, RedisUniqueQueueType, config, exemplar)
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return queue, nil
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}
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var _ UniqueByteFIFO = &RedisUniqueByteFIFO{}
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// RedisUniqueByteFIFO represents a UniqueByteFIFO formed from a redisClient
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type RedisUniqueByteFIFO struct {
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RedisByteFIFO
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setName string
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}
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// RedisUniqueByteFIFOConfiguration is the configuration for the RedisUniqueByteFIFO
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type RedisUniqueByteFIFOConfiguration struct {
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RedisByteFIFOConfiguration
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SetName string
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}
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// NewRedisUniqueByteFIFO creates a UniqueByteFIFO formed from a redisClient
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func NewRedisUniqueByteFIFO(config RedisUniqueByteFIFOConfiguration) (*RedisUniqueByteFIFO, error) {
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internal, err := NewRedisByteFIFO(config.RedisByteFIFOConfiguration)
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if err != nil {
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return nil, err
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}
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fifo := &RedisUniqueByteFIFO{
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RedisByteFIFO: *internal,
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setName: config.SetName,
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}
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return fifo, nil
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}
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// PushFunc pushes data to the end of the fifo and calls the callback if it is added
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func (fifo *RedisUniqueByteFIFO) PushFunc(ctx context.Context, data []byte, fn func() error) error {
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added, err := fifo.client.SAdd(ctx, fifo.setName, data).Result()
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if err != nil {
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return err
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}
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if added == 0 {
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return ErrAlreadyInQueue
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}
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if fn != nil {
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if err := fn(); err != nil {
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return err
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}
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}
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return fifo.client.RPush(ctx, fifo.queueName, data).Err()
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}
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// PushBack pushes data to the top of the fifo
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func (fifo *RedisUniqueByteFIFO) PushBack(ctx context.Context, data []byte) error {
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added, err := fifo.client.SAdd(ctx, fifo.setName, data).Result()
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if err != nil {
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return err
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}
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if added == 0 {
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return ErrAlreadyInQueue
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}
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return fifo.client.LPush(ctx, fifo.queueName, data).Err()
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}
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// Pop pops data from the start of the fifo
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func (fifo *RedisUniqueByteFIFO) Pop(ctx context.Context) ([]byte, error) {
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data, err := fifo.client.LPop(ctx, fifo.queueName).Bytes()
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if err != nil && err != redis.Nil {
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return data, err
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}
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if len(data) == 0 {
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return data, nil
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}
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err = fifo.client.SRem(ctx, fifo.setName, data).Err()
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return data, err
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}
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// Has returns whether the fifo contains this data
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func (fifo *RedisUniqueByteFIFO) Has(ctx context.Context, data []byte) (bool, error) {
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return fifo.client.SIsMember(ctx, fifo.setName, data).Result()
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}
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func init() {
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queuesMap[RedisUniqueQueueType] = NewRedisUniqueQueue
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}
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