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85 lines
2.2 KiB
85 lines
2.2 KiB
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package queue
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import (
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"context"
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"fmt"
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"code.gitea.io/gitea/modules/log"
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)
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// ChannelQueueType is the type for channel queue
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const ChannelQueueType Type = "channel"
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// ChannelQueueConfiguration is the configuration for a ChannelQueue
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type ChannelQueueConfiguration struct {
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WorkerPoolConfiguration
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Workers int
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Name string
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}
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// ChannelQueue implements Queue
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//
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// A channel queue is not persistable and does not shutdown or terminate cleanly
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// It is basically a very thin wrapper around a WorkerPool
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type ChannelQueue struct {
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*WorkerPool
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exemplar interface{}
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workers int
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name string
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}
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// NewChannelQueue creates a memory channel queue
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func NewChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
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configInterface, err := toConfig(ChannelQueueConfiguration{}, 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.(ChannelQueueConfiguration)
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if config.BatchLength == 0 {
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config.BatchLength = 1
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}
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queue := &ChannelQueue{
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WorkerPool: NewWorkerPool(handle, config.WorkerPoolConfiguration),
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exemplar: exemplar,
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workers: config.Workers,
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name: config.Name,
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}
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queue.qid = GetManager().Add(queue, ChannelQueueType, config, exemplar)
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return queue, nil
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}
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// Run starts to run the queue
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func (c *ChannelQueue) Run(atShutdown, atTerminate func(context.Context, func())) {
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atShutdown(context.Background(), func() {
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log.Warn("ChannelQueue: %s is not shutdownable!", c.name)
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})
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atTerminate(context.Background(), func() {
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log.Warn("ChannelQueue: %s is not terminatable!", c.name)
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})
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log.Debug("ChannelQueue: %s Starting", c.name)
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go func() {
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_ = c.AddWorkers(c.workers, 0)
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}()
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}
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// Push will push data into the queue
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func (c *ChannelQueue) Push(data Data) error {
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if !assignableTo(data, c.exemplar) {
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return fmt.Errorf("Unable to assign data: %v to same type as exemplar: %v in queue: %s", data, c.exemplar, c.name)
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}
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c.WorkerPool.Push(data)
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return nil
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}
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// Name returns the name of this queue
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func (c *ChannelQueue) Name() string {
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return c.name
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}
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func init() {
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queuesMap[ChannelQueueType] = NewChannelQueue
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}
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