Methods, apparatus, and products are disclosed for computer data communications in a high speed, low latency data communications environment that include: brokering, by a stream administration server, establishment of a message stream from a contributing client device to a feed adapter, including authenticating the contributing client device, authorizing the contributing client device to send messages to the feed adapter on the message stream, and establishing in messaging middleware of the contributing client device a set of constraints on messages to be transmitted from the contributing client device to the feed adapter; receiving, in the messaging middleware of the contributing client device from an application of the contributing client device, a message for transmission to the feed adapter on the message stream; determining, by the messaging middleware, whether contents of the message satisfy the constraints; and administering the message, by the messaging middleware, in dependence upon whether the message satisfies the constraints.