108 lines
2.5 KiB
Go
108 lines
2.5 KiB
Go
package types
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import (
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"log"
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"sync/atomic"
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)
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var lastId int64 = 1 // access via atomic
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type Backend interface {
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Run()
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}
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type Worker struct {
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Backend Backend
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Actions chan WorkerMessage
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Messages chan WorkerMessage
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Logger *log.Logger
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actionCallbacks map[int64]func(msg WorkerMessage)
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messageCallbacks map[int64]func(msg WorkerMessage)
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}
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func NewWorker(logger *log.Logger) *Worker {
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return &Worker{
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Actions: make(chan WorkerMessage, 50),
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Messages: make(chan WorkerMessage, 50),
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Logger: logger,
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actionCallbacks: make(map[int64]func(msg WorkerMessage)),
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messageCallbacks: make(map[int64]func(msg WorkerMessage)),
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}
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}
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func (worker *Worker) setId(msg WorkerMessage) {
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id := atomic.AddInt64(&lastId, 1)
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msg.setId(id)
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}
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func (worker *Worker) PostAction(msg WorkerMessage,
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cb func(msg WorkerMessage)) {
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worker.setId(msg)
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if resp := msg.InResponseTo(); resp != nil {
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worker.Logger.Printf("(ui)=> %T:%T\n", msg, resp)
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} else {
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worker.Logger.Printf("(ui)=> %T\n", msg)
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}
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worker.Actions <- msg
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if cb != nil {
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worker.actionCallbacks[msg.getId()] = cb
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}
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}
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func (worker *Worker) PostMessage(msg WorkerMessage,
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cb func(msg WorkerMessage)) {
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worker.setId(msg)
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if resp := msg.InResponseTo(); resp != nil {
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worker.Logger.Printf("->(ui) %T:%T\n", msg, resp)
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} else {
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worker.Logger.Printf("->(ui) %T\n", msg)
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}
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worker.Messages <- msg
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if cb != nil {
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worker.messageCallbacks[msg.getId()] = cb
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}
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}
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func (worker *Worker) ProcessMessage(msg WorkerMessage) WorkerMessage {
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if resp := msg.InResponseTo(); resp != nil {
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worker.Logger.Printf("(ui)<= %T(%d):%T(%d)\n",
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msg, msg.getId(), resp, resp.getId())
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} else {
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worker.Logger.Printf("(ui)<= %T(%d)\n", msg, msg.getId())
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}
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if inResponseTo := msg.InResponseTo(); inResponseTo != nil {
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if f, ok := worker.actionCallbacks[inResponseTo.getId()]; ok {
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f(msg)
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if _, ok := msg.(*Done); ok {
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delete(worker.actionCallbacks, inResponseTo.getId())
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}
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}
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}
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return msg
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}
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func (worker *Worker) ProcessAction(msg WorkerMessage) WorkerMessage {
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if resp := msg.InResponseTo(); resp != nil {
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worker.Logger.Printf("<-(ui) %T(%d):%T(%d)\n",
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msg, msg.getId(), resp, resp.getId())
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} else {
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worker.Logger.Printf("<-(ui) %T(%d)\n", msg, msg.getId())
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}
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if inResponseTo := msg.InResponseTo(); inResponseTo != nil {
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if f, ok := worker.messageCallbacks[inResponseTo.getId()]; ok {
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f(msg)
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if _, ok := msg.(*Done); ok {
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delete(worker.messageCallbacks, inResponseTo.getId())
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}
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}
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}
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return msg
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}
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