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Mol logo.svg
Original author(s)icebob
Stable release
0.14.18 / October 1, 2021; 10 months ago (2021-10-01)..[1]
Written inJavaScript
    TypeJavaScript framework
    LicenseMIT License[2] Logo.png Search MoleculerJS on Amazon.

    MoleculerJS, or simply Moleculer, is an open-source Node.js microservices framework for building distributed web applications[3] [4] [5] [6][7] [8] [9] [10] [11] [12].


    Moleculer is a progressive microservices that supports multiple software architectures: monolith [13], microservices [14] or mixed. Moleculer provides out-of-the box most of the features required to build a distributed web application, some them are listed below:

    • Request-Reply Concept
    • Streams
    • Event-driven architecture with balancing
    • Service registry & dynamic service discovery
    • Load balanced requests & events (Round-Robin, Random, CPU-usage, Latency)
    • Fault tolerance features ( Circuit Breaker, Bulkhead, Retry, Timeout, Fallback)
    • Middlewares
    • Versioned services
    • Service mixins
    • Caching (memory, Redis)
    • Pluggable transporters ( TCP, NATS, MQTT, Redis, NATS Streaming, Kafka)
    • Pluggable serializers (JSON, Avro, MessagePack , Protocol Buffers, Thrift)
    • Pluggable data validator
    • All nodes are equal, no master/leader node
    • Built-in metrics with multiple exporters (Prometheus, Datadog, StatsD)
    • Built-in tracing support with multiple exporters(Jaeger, Zipkin, Datadog)
    • HTTP Gateway

    Polyglot Implementations[edit]

    The open-source community is also working on porting Moleculer to Java, Go and Ruby languages.


    Moleculer is used by Ghost, Shareworks by Morgan Stanley, Sonda and more[15]. Microsoft's Web Template Studio also provides support for Moleculer[16]

    See also[edit]

    Other articles of the topic Free and open-source software : Enguage, PySol, Daylight Linux, Minetest, TinyButStrong, Sobi2, Arrow (software)
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    • Microservices
    • Docker
    • Kubernetes


    1. "MoleculerJS Releases". GitHub. August 26, 2021.
    2. "moleculerjs/LICENSE". GitHub. Retrieved August 28, 2021.
    3. "Moleculer - Progressive microservices framework for Node.js". Moleculer.
    4. Bigheti, Jeferson; Fernandes, Michel; Godoy, Eduardo (12 August 2021). "Control as a Service: A Microservice Approach to Industry 4.0". 2019 II Workshop on Metrology for Industry 4.0 and IoT (MetroInd4.0&IoT). pp. 438–443. doi:10.1109/METROI4.2019.8792918. ISBN 978-1-7281-0429-4. Retrieved 3 September 2021. Unknown parameter |s2cid= ignored (help) Search this book on Logo.png
    5. Κακομήτας, Δημήτριος-Στυλιανός; Kakomitas, Dimitrios-Stylianos (September 2021). "Cloud gateways for heterogenous data sources": 76. doi:10.26267/unipi_dione/1119.
    6. Anisetti, Marco; Ardagna, Claudio A.; Gaudenzi, Filippo; Damiani, Ernesto (12 November 2019). "A Continuous Certification Methodology for DevOps". Proceedings of the 11th International Conference on Management of Digital EcoSystems. Association for Computing Machinery: 205–212. doi:10.1145/3297662.3365827. ISBN 9781450362382. Unknown parameter |s2cid= ignored (help)
    7. Waseem, Muhammad; Liang, Peng; Shahin, Mojtaba; Ahmad, Aakash; Nassab, Ali Rezaei (21 June 2021). "On the Nature of Issues in Five Open Source Microservices Systems: An Empirical Study". Evaluation and Assessment in Software Engineering. Association for Computing Machinery: 201–210. arXiv:2104.12192. doi:10.1145/3463274.3463337. ISBN 9781450390538. Unknown parameter |s2cid= ignored (help)
    8. Mazayev, A.; Al-Tam, F.; Correia, N. (7 December 2021). "Attention-Based Model and Deep Reinforcement Learning for Distribution of Event Processing Tasks". arXiv:2112.03835 [cs.LG].
    9. Wayner, Peter (January 21, 2019). "18 Node.js and JavaScript libraries for fast and simple microservices". InfoWorld. Retrieved 21 October 2021.
    10. "Top 20 Best NodeJS Frameworks For Developers in 2021". UbuntuPIT - Linux News, Machine Learning, Programming, Data Science. 22 September 2021. Retrieved 21 October 2021.
    11. "Building microservices architecture with Node.js and Moleculer". merixstudio. Retrieved 29 August 2021.
    12. "MoleculerJS Is Your NodeJS Framework For Microservices". Wiredelta. Retrieved 21 October 2021.
    13. "Monolithic Architecture". Retrieved 28 August 2021.
    14. "Microservice Architecture". Retrieved 28 August 2021.
    15. "Companies using Moleculer in production". moleculer. Retrieved 21 October 2021.
    16. "Microsoft Web Template Studio". Github. Microsoft. Retrieved 21 October 2021.

    Category:JavaScript web frameworks Category:Software frameworks Frameworks Category:Web development Category:Software using the MIT license

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