close connection to data sink invoked at onClose() method of Task
close connection to data sink invoked at onClose() method of Task
open connection to data sink invoked at onStart() method of Task
open connection to data sink invoked at onStart() method of Task
is the task context at runtime
write message into data sink invoked at onNext() method of Task
write message into data sink invoked at onNext() method of Task
wraps data to be written out