vertx / io.vertx.core.spi.metrics / EventBusMetrics / beginHandleMessage

# beginHandleMessage

`abstract fun beginHandleMessage(handler: H, local: Boolean): Unit`

Called when an handler begin to process a message. The thread model depends on the actual context thats registered the handler. Event loop context This method is invoked with the handler event loop thread. Worker context This method is invoked with a worker thread.

### Parameters

`handler` - the handler processing the message

`local` - when the handled message is local