KIARA Advanced Middleware

What it is

Kiara Advanced Middleware is a Java based communication middleware for modern, efficient and secure applications.

Kiara Advanced Middleware is a library which is incorporated into the developed applications, the requirements are rather minimal. In particular it requires no service running in the background.

This first release focuses on the basic features of RPC communication:

Later versions will include additional features like:

Why get it

Implement transparent, fast, secure and standard conform communication between applications or services using a friendly and extendable Application Programming interface (API).

Avaliable for:




In the diagram the main communication flow goes from top to bottom for sending data, respectively and from bottom to top for receiving data. As in a typical layer diagram each layer is responsible for specific features and builds on top of the layers below. Some modules are cross cutting and go therefore over several layers (e.g. Security).

Here are some of the highlights of the AMi architecture shown in above diagram:

The most efficient transport and protocol method supported by both sides will be selected. AMi has been designed to also support Software Defined Networking in order to configure QOS parameters in the network.

Below we give a short description of the different layers and components.

API & Data Access

The application accesses the communication middleware using a set of defined function calls provided by the API-layer. They may vary depending on the communication pattern (see below).

The main functionality of the Data Access Layer is to provide the mapping of data types and Function Stubs/Skeletons (request/response pattern) or DataReaders/-Writers (publish/subscribe or point-to-point pattern).

The Advanced Middleware GE provides two variants of this functionality:

Quality of Service (QoS) parameters and Security Policies may be provided through the API and/or IDL-Annotations. This information will be used by the QoS and Security modules to ensure the requested guarantees.

Depending on the communication pattern, different communication mechanisms will be used.


Depending on configuration, communication pattern and type of end-points the data will be serialized to the required transmission format when sending and deserialized to the application data structures when receiving.

Wire Protocols

Depending on configuration, communication pattern and type of end-points the matching Wire-Protocol will be chosen.


The dispatching module is supporting various threading models and scheduling mechanisms. The module is providing single-threaded, multi-threaded and thread-pool operation and allows synchronous and asynchronous operation. Priority or time constraint scheduling mechanisms can be specified through QoS parameters.

Transport Mechanisms

Based on the QoS parameters and the runtime-environment the QoS module will decide which transport mechanisms and protocols to choose for data transmission.

In Software Defined Networking (SDN) environments, the QoS module will interface with the Netfloc GE to get additional network information or even provision the network components to provide the requested quality of service or privacy.

Transport Protocols

All standard transport protocols (TCP, UDP) as well as encrypted tunnels (TLS, DTLS) are supported.


The security module is responsible for authentication of communication partners and will ensure in the whole middleware stack the requested data security and privacy. The required information can be provided with Security Annotations in the IDL and by providing a security policy via the API.


The negotiation module provides mechanisms to discover or negotiate the optimal transmission format and protocols when peers are connecting. It discovers automatically the participants in the distributed system, searching through the different transports available (shared memory and UDP by default, TCP for WebService compatibility) and evaluates the communication paradigms and the corresponding associated QoS parameters and security policies.

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