Zero-Flows is thin wrapper around ZeroMQ, Jansson and Apache ZooKeeper, helping to build versatile distributed workflows with a central configuration.
The workflows are chains of interconnected "steps", when each step is managed by several instances of the same service type. It is designed to scale gracefully (each "step" can be scaled independently) and to give the administrator the maximum control on the deployment of the nodes.
This is not a competitor for Actors frameworks as Akka (even though it achieves the same goal), because it is much more raw and simplistic.
Zero-Flows belongs to Jean-François SMIGIELSKI and all the contributors to the project.
Zero-Flows is distributed under the terms of the GNU Affero GPL (http://www.gnu.org/licenses/agpl.html).
ZeroMQ 3.2.3 (http://zeromq.org) provides a taste a brokerless BUS. The elementary transport unit is a ZeroMQ message, and Zero-Flows lets you benefit of PUSH/PULL and PUB/SUB patterns of ZeroMQ.
Apache ZooKeeper 3.5 (http://zookeper.apache.org) is used to configure the nodes and discover the peer nodes.
The configuration format used into Zookeeper is JSON, and we used Jansson for the codec. It appears to be really easy to use.
Zero-flows has been built on top of the Gnome Library (https://developer.gnome.org/glib/). It provides easy-to-use data structures and a lot of necessary features.
You will require cmake to build and configure the Makefile.
[nobody@localhost /tmp]$ cmake -DPREFIX=/tmp .
[nobody@localhost /tmp]$ make install
This is still an early release. There is a lot to do to make it easy to use.
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