description Vert.x Overview
Vert.x is an open-source toolkit for building reactive, event-driven applications on the Java Virtual Machine. It uses asynchronous, non-blocking APIs and supports several languages that run on the JVM, including Java, Kotlin, JavaScript, Groovy, Ruby, and Scala. The project was created by Tim Fox and later developed with Red Hat support. It is intended for developers building network services and other concurrent backend systems.
help Vert.x FAQ
What is Vert.x?
Vert.x is an open-source toolkit for building reactive, event-driven applications on the Java Virtual Machine. It uses asynchronous, non-blocking APIs to handle many concurrent tasks efficiently.
Which programming languages can be used with Vert.x?
Vert.x supports several JVM languages, including Java, Kotlin, JavaScript, Groovy, Ruby, and Scala. Teams can use the language that fits their existing code while sharing the Vert.x runtime model.
Is Vert.x a full application framework or a toolkit?
Vert.x describes itself as a toolkit rather than a single all-in-one application framework. Developers combine its modules for networking, messaging, web services, data access, and other event-driven tasks.
What does non-blocking mean in a Vert.x application?
Non-blocking code avoids making an event-loop thread wait while a slow network or database operation finishes. This lets the application continue handling other events, provided long CPU-heavy work is moved away from the event loop.
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