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- // 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 (
- "context"
- "fmt"
- "reflect"
- "time"
-
- "code.gitea.io/gitea/modules/log"
- )
-
- // ChannelQueueType is the type for channel queue
- const ChannelQueueType Type = "channel"
-
- // ChannelQueueConfiguration is the configuration for a ChannelQueue
- type ChannelQueueConfiguration struct {
- QueueLength int
- BatchLength int
- Workers int
- MaxWorkers int
- BlockTimeout time.Duration
- BoostTimeout time.Duration
- BoostWorkers int
- Name string
- }
-
- // ChannelQueue implements
- type ChannelQueue struct {
- pool *WorkerPool
- exemplar interface{}
- workers int
- name string
- }
-
- // NewChannelQueue create a memory channel queue
- func NewChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
- configInterface, err := toConfig(ChannelQueueConfiguration{}, cfg)
- if err != nil {
- return nil, err
- }
- config := configInterface.(ChannelQueueConfiguration)
- if config.BatchLength == 0 {
- config.BatchLength = 1
- }
- dataChan := make(chan Data, config.QueueLength)
-
- ctx, cancel := context.WithCancel(context.Background())
- queue := &ChannelQueue{
- pool: &WorkerPool{
- baseCtx: ctx,
- cancel: cancel,
- batchLength: config.BatchLength,
- handle: handle,
- dataChan: dataChan,
- blockTimeout: config.BlockTimeout,
- boostTimeout: config.BoostTimeout,
- boostWorkers: config.BoostWorkers,
- maxNumberOfWorkers: config.MaxWorkers,
- },
- exemplar: exemplar,
- workers: config.Workers,
- name: config.Name,
- }
- queue.pool.qid = GetManager().Add(queue, ChannelQueueType, config, exemplar, queue.pool)
- return queue, nil
- }
-
- // Run starts to run the queue
- func (c *ChannelQueue) Run(atShutdown, atTerminate func(context.Context, func())) {
- atShutdown(context.Background(), func() {
- log.Warn("ChannelQueue: %s is not shutdownable!", c.name)
- })
- atTerminate(context.Background(), func() {
- log.Warn("ChannelQueue: %s is not terminatable!", c.name)
- })
- go func() {
- _ = c.pool.AddWorkers(c.workers, 0)
- }()
- }
-
- // Push will push data into the queue
- func (c *ChannelQueue) Push(data Data) error {
- if c.exemplar != nil {
- // Assert data is of same type as r.exemplar
- t := reflect.TypeOf(data)
- exemplarType := reflect.TypeOf(c.exemplar)
- if !t.AssignableTo(exemplarType) || data == nil {
- return fmt.Errorf("Unable to assign data: %v to same type as exemplar: %v in queue: %s", data, c.exemplar, c.name)
- }
- }
- c.pool.Push(data)
- return nil
- }
-
- // Name returns the name of this queue
- func (c *ChannelQueue) Name() string {
- return c.name
- }
-
- func init() {
- queuesMap[ChannelQueueType] = NewChannelQueue
- }
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