vertx / io.vertx.rxjava.ext.stomp / StompServer / writingFrameHandler

# writingFrameHandler

`open fun writingFrameHandler(handler: Handler<ServerFrame>): StompServer`

Configures the handler that is invoked every time a frame is going to be written to the "wire". It lets you log the frames, but also adapt the frame if needed.

### Parameters

`handler` - the handler, must not be `null`

Return
the current io.vertx.rxjava.ext.stomp.StompServer