The Wolfram Language supports efficient publish-subscribe communication, brokered either in the Wolfram Cloud (through channelbroker.wolframcloud.com) or elsewhere. Channels can be used for asynchronous communication, either between Wolfram Language sessions on the cloud or desktop, or with external systems (with data provided in a JSON format).

ChannelObject — symbolic representation of a communication channel

$ChannelBase — base URL of default broker to use for channel communications

FindChannels — find available channels

CreateChannel — create a new communication channel on the server

DeleteChannel — delete a communication channel on the server

ChannelListen — set up a listener to specify what to do whenever a message arrives

ChannelListener  ▪  RemoveChannelListener

ChannelListeners — list of currently active channel listeners

ChannelSend — send an expression as a message to a specified channel

ChannelSubscribers — list of users currently subscribed to a channel

RemoveChannelSubscribers — removes currently active channel subscribers

ChannelReceiverFunction — function to execute in the cloud for each received message

Channel Options

HandlerFunctions — handler functions to execute when a message is received

NotificationFunction — notification to generate when a message is received

ChannelBrokerAction — action to execute server-side in addition to routing a message

ChannelPreSendFunction — function to apply to messages before sending

Initialization — how to initialize processing functions for the channel

Permissions — permissions for reading, writing, and changing the channel

ChannelDatabin — databin to which to send all received messages

Standard Channels

"WolframID" — "home channel" for a particular user