package mock import ( "errors" "sync" "github.com/google/uuid" "github.com/micro/go-micro/broker" ) type mockBroker struct { opts broker.Options sync.RWMutex connected bool Subscribers map[string][]*mockSubscriber } type mockPublication struct { topic string message *broker.Message } type mockSubscriber struct { id string topic string exit chan bool handler broker.Handler opts broker.SubscribeOptions } func (m *mockBroker) Options() broker.Options { return m.opts } func (m *mockBroker) Address() string { return "" } func (m *mockBroker) Connect() error { m.Lock() defer m.Unlock() if m.connected { return nil } m.connected = true return nil } func (m *mockBroker) Disconnect() error { m.Lock() defer m.Unlock() if !m.connected { return nil } m.connected = false return nil } func (m *mockBroker) Init(opts ...broker.Option) error { for _, o := range opts { o(&m.opts) } return nil } func (m *mockBroker) Publish(topic string, message *broker.Message, opts ...broker.PublishOption) error { m.Lock() defer m.Unlock() if !m.connected { return errors.New("not connected") } subs, ok := m.Subscribers[topic] if !ok { return nil } p := &mockPublication{ topic: topic, message: message, } for _, sub := range subs { if err := sub.handler(p); err != nil { return err } } return nil } func (m *mockBroker) Subscribe(topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) { m.Lock() defer m.Unlock() if !m.connected { return nil, errors.New("not connected") } var options broker.SubscribeOptions for _, o := range opts { o(&options) } sub := &mockSubscriber{ exit: make(chan bool, 1), id: uuid.New().String(), topic: topic, handler: handler, opts: options, } m.Subscribers[topic] = append(m.Subscribers[topic], sub) go func() { <-sub.exit m.Lock() var newSubscribers []*mockSubscriber for _, sb := range m.Subscribers[topic] { if sb.id == sub.id { continue } newSubscribers = append(newSubscribers, sb) } m.Subscribers[topic] = newSubscribers m.Unlock() }() return sub, nil } func (m *mockBroker) String() string { return "mock" } func (m *mockPublication) Topic() string { return m.topic } func (m *mockPublication) Message() *broker.Message { return m.message } func (m *mockPublication) Ack() error { return nil } func (m *mockSubscriber) Options() broker.SubscribeOptions { return m.opts } func (m *mockSubscriber) Topic() string { return m.topic } func (m *mockSubscriber) Unsubscribe() error { m.exit <- true return nil } func NewBroker(opts ...broker.Option) broker.Broker { var options broker.Options for _, o := range opts { o(&options) } return &mockBroker{ opts: options, Subscribers: make(map[string][]*mockSubscriber), } }