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ORBexpress FAQs

Does ORBexpress support the OMG CORBA Real-time Specification?

How does ORBexpress RT and its real-time implementation differ from other ORBs?

What CORBA services does ORBexpress provide?

What's the difference between ORBexpress for Ada and ORBexpress for C++?

How many objects or interfaces can ORBexpress support?

What's the difference between ORBexpress RT and ORBexpress ST?

Can I place ORBexpress RT on a non real-time operating system? If I do, what type of results can I expect?

What type of interoperability exists between ORBexpress and other ORBs supporting different languages?

Does ORBexpress RT interoperate with other non real-time ORBs?

Does ORBexpress® support the OMG CORBA Real-time Specification?
ORBexpress RT is our implementation of the CORBA Real-time Specification, and includes the standard features as well as additional support for setting transport Quality of Service (QoS) levels. Some highlights of the standard include Distributed Priority Inheritance, Priority Banded Connections, resource partitioning, and preallocation controls. To view the complete standard, look at the CORBA Resources section for additional information.

How does ORBexpress RT and its real-time implementation differ from other ORBs?
The Real-time CORBA specification identifies interfaces and policies that an ORB must support in order to comply with the real-time specification. Building multi-threaded real-time software, including real-time ORB's, requires knowledge of the characteristics of real-time systems and the careful use of resources and the mutexes protecting them. ORBexpress provides a ceiling locking protocol mutex used in the ORB, as well as by the developer. ORBexpress supports replaceable transports, so you can replace the not-so-predictable TCP/IP with a transport more conducive to real-time behavior. Most importantly, ORBexpress was built from the "ground up", with real-time internals - so it's not just an Enterprise ORB ported to real-time operating systems.

What services does ORBexpress provide?
ORBexpress includes the CORBA services Names, Events and Lightweight Logging for many of our supported platforms.

What's the difference between ORBexpress for Ada, ORBexpress for C++ and ORBexpress for Java?
ORBexpress for Ada, ORBexpress for C++ and ORBexpress for Java are completely separate products, and are licensed separately. Each product shares a common architecture and yet is coded entirely in its native language to maintain consistency for threading, exceptions, etc.

How many objects or interfaces can ORBexpress support?
ORBexpress does not inherently limit the number of objects, interfaces, clients, servers, threads, or message sizes in your system, although we provide the ability to configure the ORB to optimize your system's characteristics. Limitations will, of course, exist due to the amount of system resources you have available.

What's the difference between ORBexpress RT and ORBexpress ST?
ORBexpress ST is for self-hosted systems only. ORBexpress RT is for hard real-time projects or for soft real-time projects that need more control over Quality of Service and resource usage. ORBexpress RT also allows you to cross compile to an embedded target, plug in a replaceable transport, and reconfigure the ORB to optimize size or speed. Take our test to determine the ORBexpress product that best fits your needs by going to our Products section.

Can I place ORBexpress RT on a non real-time operating system? If I do, what type of results can I expect?
Yes, in fact many of our customers use ORBexpress RT on a non real-time OS. The results you get will vary depending on which OS you're using. Some non real-time OSs give quite predictable results when configured properly.

What type of interoperability exists between ORBexpress and other ORBs supporting different languages?
The combination of IIOP and POA support, along with the features we support from the Interoperable Naming Service standard, ensure that ORBexpress operates with all other IIOP compliant CORBA products.

Does ORBexpress RT interoperate with other non real-time ORBs?
One of the main requirements in the development of Real-time CORBA is to ensure that real-time ORBs interoperate with non real-time ORBs. ORBexpress is carefully designed to ensure interoperability. Many customers use ORBexpress RT for their real-time system requirements, and use a non real-time ORB for the enterprise connection.

Please contact your account manager, or fill out an information request form, to get an evaluation copy of ORBexpress so you can experience for yourself the benefits of using the world's fastest, smallest and most robust ORB.