| package cdp |
| |
| import ( |
| "fmt" |
| |
| "github.com/mafredri/cdp/rpcc" |
| ) |
| |
| type eventClient interface { |
| rpcc.Stream |
| } |
| |
| type getStreamer interface { |
| GetStream() rpcc.Stream |
| } |
| |
| // Sync takes two or more event clients and sets them into synchronous operation, |
| // relative to each other. This operation cannot be undone. If an error is |
| // returned this function is no-op and the event clients will continue in |
| // asynchronous operation. |
| // |
| // All event clients must belong to the same connection and they must not be |
| // closed. Passing multiple clients of the same event type to Sync is not |
| // supported and will return an error. |
| // |
| // An event client that is closed is removed and has no further affect on the |
| // clients that were synchronized. |
| // |
| // When two event clients, A and B, are in sync they will receive events in the |
| // order of arrival. If an event for both A and B is triggered, in that order, |
| // it will not be possible to receive the event from B before the event from A |
| // has been received. |
| func Sync(c ...eventClient) error { |
| var s []rpcc.Stream |
| for _, cc := range c { |
| cs, ok := cc.(getStreamer) |
| if !ok { |
| return fmt.Errorf("cdp: Sync: bad eventClient type: %T", cc) |
| } |
| s = append(s, cs.GetStream()) |
| } |
| return rpcc.Sync(s...) |
| } |