Fan-out

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Fan-out has multiple meanings in software engineering.

## Contents

* 1 Message-oriented middleware
* 2 Software design and quality assurance
* 3 See also
* 4 References

## Message-oriented middleware

In message-oriented middleware solutions, fan-out is a messaging pattern used to model an information exchange that implies the delivery (or spreading) of a message to one or multiple destinations possibly in parallel, and not halting the process that executes the messaging to wait for any response to that message.[1][2][3]

## Software design and quality assurance

In software construction, the fan-out of a class or method is the number of other classes used by that class or the number of other methods called by that method.[4]

Additionally, fan-out has impact on the quality of a software.[5][6][7]

## See also

* Middleware
* Coupling (computer programming)
* Software quality
* Software metric

## References

1. ↑ "AMQP 0-9-1 Model Explained". https://www.rabbitmq.com/tutorials/amqp-concepts.html.
2. ↑ "Writing Request/Response Clients and Servers: Sending Asynchronous Messages". Oracle Tuxedo Documentation. https://docs.oracle.com/cd/E13161_01/tuxedo/docs10gr3/pgc/pgreq.html#wp1055477.
3. ↑ "/dev/fanout : A One-To-Many Multiplexer". http://www.linuxtoys.org/fanout/fanout.html.
4. ↑ McConnell, Steven (2004). "Chapter 5: Design Construction". Code Complete, Second Edition. Microsoft Press. ISBN 978-0-7356-1967-8. https://archive.org/details/codecomplete0000mcco.
5. ↑ Alikhashashneh, E.; Raje, R.; Hill, J. (April 2018). "Using Software Engineering Metrics to Evaluate the Quality of Static Code Analysis Tools". 2018 1st International Conference on Data Intelligence and Security (ICDIS). pp. 65–72. doi:10.1109/ICDIS.2018.00017. ISBN 978-1-5386-5762-1. https://ieeexplore.ieee.org/document/8367641.
6. ↑ Krauskopf, J. (February 1990). "Elemental concerns (software design)". IEEE Potentials 9 (1): 13–15. doi:10.1109/45.46811. ISSN 1558-1772. https://ieeexplore.ieee.org/document/46811.
7. ↑ Mubarak, A.; Counsell, S.; Hierons, R. M. (May 2010). "An evolutionary study of fan-in and fan-out metrics in OSS". 2010 Fourth International Conference on Research Challenges in Information Science (RCIS). pp. 473–482. doi:10.1109/RCIS.2010.5507329. ISBN 978-1-4244-4839-5. https://ieeexplore.ieee.org/document/5507329.

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