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YAMI4 - Messaging Solution for Distributed Systems

YAMI4 is a set of messaging libraries designed for distributed systems with particular focus on control and monitoring systems.

The major features of YAMI4 are:

peer-to-peer messaging
support for message priorities
built-in support for load balancing and automatic fail-over
support for publish-subscribe messaging
support for isolated memory partitions (intended for embedded and critical systems)
support for real-time development with comprehensive range of timeout features
high performance and scalability with non-blocking I/O
small memory and resource footprint (read more)
interface definition language
no dependencies on other libraries

In addition to the above capabilities that are ready to use in the peer-to-peer mode, the YAMI4 suite offers:

optional separate message broker for heavy-duty publish-subscribe scenarios with flexible message routing engine
message queue server for large-scale load-balancing scenarios
name service for easier configurability and management of complex systems
distributed cache facility for easy data sharing
GUI management console

The YAMI4 suite is a multi-language and multi-platform package with dedicated libraries for Ada, C++, Java, .NET, Objective-C and Python and is supported on POSIX-like systems (including iOS), Microsoft Windows and Java-based platforms.

In addition to the main library package that is intended for use on mainstream compilation and system platforms, the pure-C core library together with the C implementation of the message broker service are provided for further adaptation on those embedded systems that have limited compiler toolchains.

See the Frequently Asked Questions about YAMI4.

Documentation

"Programming Distributed Systems with YAMI4" by Maciej Sobczak

This book is a comprehensive YAMI4 manual that describes the messaging concepts and typical usage patterns.

The HTML version of this book is available as well.

YAMI4 Video Tutorial on YouTube

This tutorial explains fundamental concepts of the YAMI4 library and demonstrates the use of example programs.

For the API reference see the documentation generated from source files:

Supplementary material:

YAMI4-AE11-print.pdf Printer-ready version of slides and comments prepared for the YAMI4 Ada tutorial.
(these are handouts from the Ada Connection conference, 2011, Edinburgh).

Discussion Group

The YAMI4 Google Group is a place where YAMI4 users are invited to meet others and to discuss their experiences, find help and exchange ideas.

Licensing and Download

The YAMI4 libraries are dual-licensed and are available in the following two versions:

GPL package General Public License, version 3, with intended use for product evaluation, student or academic projects and for all those open-source projects where the conditions of the GPL license are appropriate and which do not need to rely on technical support.
Professional package: Boost Software License, with intended use in both closed-source (which is a frequent choice in commercial projects) and open-source developments where dedicated technical support is required.

The following GPL packages are available for download (contact us for details on professional packages):

yami4-gpl-1.7.0.tar.gz - source package: all libraries, services and tools
yami4-gpl-1.7.0.zip - source package
yami4c-gpl-1.7.1.tar.gz - source package: C core library with message broker for embedded systems
yami4c-gpl-1.7.1.zip - source package
yami4-gpl-1.7.0-Windows-bin.zip - binary package with all services compiled for Windows

See the changelog.txt file for the detailed list of modifications.

Additional tools

The Wireshark plugin for Windows allows to inspect the message traffic on the fly and dissect individual frames.

See the screenshots from example client-server session:

Need more information about the YAMI4 project? Do not hesitate to ask.