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Top 15 Java Concurrency Projects
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Project mention: LMAX Disruptor – High Performance Inter-Thread Messaging Library | /r/hackernews | 2023-11-20
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Hibernate Reactive integrates with Vert.x, but an extension allows to bridge to Project Reactor if wanted
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InfluxDB
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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Java 21 doesn't retrofit green threads though. Quasar [0] 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.
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Apache Log4j 2
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 -
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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ExcelPasswordCracker
A simple brute-force attack password cracker for Excel files with multi-threaded implementation.
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Concurrent-Checkers-Game
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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SaaSHub
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
The latest post mention was on 2023-11-20.
Java Concurrency related posts
- Modern Async Primitives on iOS, Android, and the Web
- LMAX Disruptor – High Performance Inter-Thread Messaging Library
- Disruptor 4.0.0 Released
- Picking up Go as a Java dev—what could possibly go wrong?
- if you had to restart at 0 knowledge what would you do?
- Java Is Fast, If You Don’t Create Many Objects
- Show HN: Playing with Generics and atomics in Go 1.19
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Index
What are some of the best open-source Concurrency projects in Java? This list will help you:
| Project | Stars | |
|---|---|---|
| 1 | Disruptor | 16,641 |
| 2 | Vert.x | 13,863 |
| 3 | Android-RxJava | 7,559 |
| 4 | Quasar | 4,538 |
| 5 | JCTools | 3,400 |
| 6 | Apache Log4j 2 | 3,206 |
| 7 | ea-async | 1,342 |
| 8 | react-native-threads | 714 |
| 9 | java-concurrency-examples | 253 |
| 10 | lingua-franca | 190 |
| 11 | Composer | 19 |
| 12 | money-transfer-rest-api | 14 |
| 13 | time-series-concurrency-example | 6 |
| 14 | ExcelPasswordCracker | 5 |
| 15 | Concurrent-Checkers-Game | 4 |
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