3ded768a6f
* testing message queue * better mq syncronisation * major code refactoring, concern separation. * bugfix * code refactoring * queuesize configurable via flags * code refactoring * comments * code refactoring, updated readme
47 lines
984 B
Go
47 lines
984 B
Go
package internal
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import (
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"log"
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"github.com/marcopeocchi/yt-dlp-web-ui/server/config"
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)
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type MessageQueue struct {
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ch chan *Process
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consumerCh chan struct{}
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}
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// Creates a new message queue.
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// By default it will be created with a size equals to nthe number of logical
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// CPU cores.
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// The queue size can be set via the qs flag.
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func NewMessageQueue() *MessageQueue {
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size := config.Instance().GetConfig().QueueSize
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if size <= 0 {
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log.Fatalln("invalid queue size")
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}
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return &MessageQueue{
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ch: make(chan *Process, size),
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consumerCh: make(chan struct{}, size),
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}
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}
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// Publish a message to the queue and set the task to a peding state.
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func (m *MessageQueue) Publish(p *Process) {
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go p.SetPending()
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m.ch <- p
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}
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// Setup the consumer listened which "subscribes" to the queue events.
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func (m *MessageQueue) SetupConsumer() {
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for msg := range m.ch {
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m.consumerCh <- struct{}{}
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go func(p *Process) {
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p.Start()
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<-m.consumerCh
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}(msg)
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}
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}
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