Dispatcher

Dispatches tasks from a host to daemons for processing, using FIFO scheduling, queuing tasks as required. Daemon / dispatcher settings are controlled by daemons() and this function should not need to be called directly.

Usage

dispatcher(host, url = NULL, n = 0L)

Arguments

host

(character) URL to dial into, typically an IPC address.

url

(character) URL to listen at for daemon connections, e.g. 'tcp://hostname:5555'. Use 'tls+tcp://' for secure TLS.

n

(integer) number of local daemons launched by host.

Value

Invisibly, an integer exit code: 0L for normal termination.

Details

The network topology is such that a dispatcher acts as a gateway between the host and daemons, ensuring that tasks received from the host are dispatched on a FIFO basis for processing. Tasks are queued at the dispatcher to ensure tasks are only sent to daemons that can begin immediate execution of the task.