Zeebe Transport

Simple asynchronous Message Transport over TCP/IP.

Features

• Multi-Protocol:

  • Single Message
  • Request-Response

• Asynchronous

• Pipelining for high throughput (many interactions can share single TCP connection)

• Web Site

• Documentation

• Issue Tracker

• Slack Channel

• User Forum

• Contribution Guidelines

• Connection Management (reconnect, keep-alive)

Framing & Pipelining

zb-transport implements simple message framing. A frame is a header which is put on every message and most importantly defined the length of the message:

+---------------------------------------------------------------+
|                        Message Length                         |
+---------------------------------------------------------------+
|                   [other header properties]                   |
+---------------------------------------------------------------+
|                                                               |
|                            Message                          ...
...                                                             |
+---------------------------------------------------------------+

This way, multiple independent messages can be streamed through a single TCP channel:

-----------------------------------------------------------------
|   Message 1  |   Message 2  |  Message 3  |  Message 4  |  ...
-----------------------------------------------------------------

The pipelining allows using TCP effectively: potentially many messages can be packed into a single TCP segment.

Single Message Protocol

This protocol allows sending of single, unrelated messages.

Request-Response

The request response-protocol protocol provides a simple means correlating messages which represent a request from a client to a server to a reply message which represents a response.