Exemplo n.º 1
0
func (ih *InputHandler) ReadInput(ch chan entity.InputData) {
	input := entity.NewInputData()
	input.Name = ih.GetName()
	input.State = entity.INPUT_DATA_CONTINUE
	ih.State = ext.INPUT_STATE_RUNNING
	for i := 0; i < 10; i++ {
		input.Data = []byte("aaaa")
		ch <- *input
		time.Sleep(100 * time.Millisecond)
	}

	ih.State = ext.INPUT_STATE_DONE
	input.State = entity.INPUT_DATA_END
	input.Data = nil
	ch <- *input
	return
}
Exemplo n.º 2
0
func (ih *InputHandler) ReadInput(ch chan entity.InputData) {
	var err error

	input := entity.NewInputData()
	input.Name = ih.config.Name
	input.State = entity.INPUT_DATA_CONTINUE

	defer func() {
		if err != nil {
			input.State = entity.INPUT_DATA_END
			ih.State = ext.INPUT_STATE_ERROR
			ch <- *input
			log.Printf("Handler exited with error: %s\n", err.Error())
		}
	}()

	session, err := ih.createSession(ih.config)
	if err != nil {
		return
	}
	ih.State = ext.INPUT_STATE_RUNNING

	//Set  a pipe for session's output.
	//Remote session will blocked(sleep) if pipe is full.
	r, err := session.StdoutPipe()
	if err != nil {
		return
	}

	//Data receiving needs start separately with main thread.
	//This thread blocks until first data received.
	go func() {
		defer session.Close()

		buffer := make([]byte, 1024)
		for {
			//r.Read will block(sleep) if pipe is empty.
			readBytes, err := r.Read(buffer)
			if err != nil {
				break
			} else {
				input.Data = buffer[:readBytes]
				input.State = entity.INPUT_DATA_CONTINUE
			}
			ch <- *input
		}

		ih.State = ext.INPUT_STATE_DONE
		if err != nil {
			ih.State = ext.INPUT_STATE_ERROR
		} else {
			input.State = entity.INPUT_DATA_END
		}
		input.Data = nil

		// Pass a copy of "input".
		// It is needed to avoid the "input"
		// updated unfortunately by this goroutine
		// while the main thread refers.
		ch <- *input

	}()

	//Start session.
	if err := session.Run(ih.config.Command); err != nil {
		return
	}

	ih.State = ext.INPUT_STATE_DONE
}