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Top 15 Java Concurrency Projects
High Performance Inter-Thread Messaging LibraryProject mention: LMAX Disruptor – High Performance Inter-Thread Messaging Library | /r/hackernews | 2023-11-20
Vert.x is a tool-kit for building reactive applications on the JVMProject mention: Reactive database access on the JVM | dev.to | 2023-07-13
Hibernate Reactive integrates with Vert.x, but an extension allows to bridge to Project Reactor if wanted
Collect and Analyze Billions of Data Points in Real Time. Manage all types of time series data in a single, purpose-built database. Run at any scale in any environment in the cloud, on-premises, or at the edge.
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Fibers, Channels and Actors for the JVM (by puniverse)Project mention: Java 21 makes me like Java again | news.ycombinator.com | 2023-09-16
Java 21 doesn't retrofit green threads though. Quasar  is a library that implemented fibers for Java and the main developer pron has joined the OpenJDK development team. All that was necessary for first party support is to make the JDK libraries yield when blocking.
Adopting async isn't impossible at all, there is very little demand for it.
Apache Log4j 2 is a versatile, feature-rich, efficient logging API and backend for Java.Project mention: Log4j requesting feedback on which modules/features to drop | news.ycombinator.com | 2023-09-28
EA Async implements async-await methods in the JVM.Project mention: Fluent: Static Extension Methods for Java | news.ycombinator.com | 2023-07-02
I feel like this misses the reason I like extension methods: discoverability.
With an extension method, I can do `object.` and my IDE will tell me what can be called on object. With a static helper method, it isn't as easy to know what is available. I need to know which helpers actually exist.
Since this doesn't have IDE support, it doesn't help discoverability. I'm not going to get nice autocomplete that shows me what is available. In fact, my IDE is going to highlight it as a bug. If I have a spelling mistake, I won't be able to easily pick it up - I'll assume it's just the normal complaint for all of these fluent extension methods.
That makes this simply syntactic sugar rather than something that actually helps me discover things more easily. It then hurts readability and navigation since I can't easily click through to get the definition of the method.
On a more general note about Java, things like this are one of the reasons I don't love the Java ecosystem. People try to change the behavior of Java in really hacky ways that don't work well. I understand that it's an attempt to overcome shortcomings in the language, but when one looks other languages it becomes clear that Java could have just evolved the language to be better. Java has lots of good things and I'm not looking to argue that. However, when I look at things like this, it makes me think that Java needs to really address the core language.
Instead, we get lots of tools like this which might be nice, but make it really hard to understand what's going on. Electronic Arts created an async/await library that'll do crazy stuff to let you do async/await style programming (https://github.com/electronicarts/ea-async). Yes, Java is doing good things with structured concurrency and Project Loom, but the point is how people keep trying to work around the language. There are so many POJO generators it isn't funny: AutoValue, Immutables, JodaBeans, Lombok, and more I'm probably forgetting. Java records don't fulfill everything (and they're at least a decade late). Java doesn't support expression trees for lambdas so libraries sometimes do crazy hacky things to make that exist.
Java is a great piece of technology, but it feels like people are often trying to overcome issues with the language through really hacky means in a way that I don't see in other languages. Java is getting better about modernizing the language, but it still feels like people are running against the language more than in other ecosystems.
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A simple brute-force attack password cracker for Excel files with multi-threaded implementation.Project mention: Sacked employee with password protected excel files | /r/msp | 2023-03-11
Concurrent/simultaneous checkers game for up to 8 players. Built this in correspondence to https://lichess.org/simul but to play Checkers as there is no such game that exists on the WWW.
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Java Concurrency related posts
Modern Async Primitives on iOS, Android, and the Web
4 projects | dev.to | 6 Dec 2023
LMAX Disruptor – High Performance Inter-Thread Messaging Library
1 project | /r/hackernews | 20 Nov 2023
Disruptor 4.0.0 Released
1 project | news.ycombinator.com | 29 Sep 2023
Picking up Go as a Java dev—what could possibly go wrong?
3 projects | /r/golang | 12 Dec 2022
if you had to restart at 0 knowledge what would you do?
5 projects | /r/PinoyProgrammer | 11 Oct 2022
Java Is Fast, If You Don’t Create Many Objects
1 project | news.ycombinator.com | 12 Sep 2022
Show HN: Playing with Generics and atomics in Go 1.19
2 projects | news.ycombinator.com | 6 Sep 2022
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What are some of the best open-source Concurrency projects in Java? This list will help you:
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