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messageHandleService.go
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/
messageHandleService.go
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package internal
import "context"
type MessageHandleService struct {
modules []MessageHandleModule
}
func NewMessageHandleService() *MessageHandleService {
return &MessageHandleService{}
}
func (s *MessageHandleService) Register(module MessageHandleModule) {
size := len(s.modules)
if size > 0 {
last := s.modules[size-1]
// ignore all new successor if the last RequestHandleModule cannot accept successor
if !last.CanSetSuccessor() {
return
}
last.SetSuccessor(module)
}
s.modules = append(s.modules, module)
}
func (s *MessageHandleService) ProcessMessage(ctx *Context, message *Message, state ProcessingState, recover *Recover) {
if handler := s.first(); handler != nil {
handler.ProcessMessage(ctx, message, state, recover)
}
}
func (s *MessageHandleService) first() MessageHandleModule {
if len(s.modules) > 0 {
return s.modules[0]
}
return nil
}
func (s *MessageHandleService) triggerStart(ctx context.Context) error {
var err error
for _, m := range s.modules {
if err = m.OnStart(ctx); err != nil {
return err
}
}
return nil
}
func (s *MessageHandleService) triggerStop(ctx context.Context) <-chan error {
ch := make(chan error)
go func() {
defer close(ch)
for _, m := range s.modules {
RedisWorkerLogger.Printf("stopping %T", m)
err := m.OnStop(ctx)
if err != nil {
ch <- &StopError{
v: m,
err: err,
}
}
}
}()
return ch
}