ls-annotations
Netty
ls-annotations | Netty | |
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2 | 53 | |
7 | 32,796 | |
- | 0.4% | |
0.0 | 9.6 | |
about 1 year ago | 5 days ago | |
Java | Java | |
MIT License | Apache License 2.0 |
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Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
ls-annotations
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Jodd – The Unbearable Lightness of Java
I remember the days, when the Spring framework was advertised as a lightweight alternative to Enterprise java beans (ejb); now Spring outgrew the pretence of being lightweight, don't know when that happened. last year i got back to working with java and spring boot, and i was overwhelmed by the prevalence of annotations in the tool.
To cope with all this, i wrote this little project: https://github.com/MoserMichael/ls-annotations
It's a decompiler that is listing all annotations, so it becomes easier to grep a text file in order to detect the dependencies between annotations.
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Ask HN: What Are You Working On?
https://github.com/MoserMichael/ls-annotations wrote a tool that decompiles jdk byte code files and lists declarations (classes, functions, variables) with annotations only. You can also use it to find all classes/interfaces derived from a given class/inerface - and all the classes/interfaces derived from a given class/interface.
The tool uses the asm library to scan class files and to extract annotations. it can detect annotations with retention policy CLASS and RUNTIME. It can't detect annotations with retention policy SOURCE that are not put into bytecode, for example @Override is one of these.
Netty
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Reactor Netty: UDP DNS client example
Code of netty is here and using following library
- Netty: Asynchronous event-driven network application framework
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New scalable, fault-tolerant, and efficient open-source MQTT broker
We use Netty (https://netty.io/) as the source of the MQTT communication, and we build the MQTT features the MQTT broker should support ourselves on top of that.
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Modern Async Primitives on iOS, Android, and the Web
In this space, we also have the somewhat related term blocking. Java's NIO library is one well-known non-blocking tool used for managing multiple tasks on a single Java thread. When listening to sockets, most of the time a thread is just blocked, doing nothing until it receives some data. So, it's efficient to use a single thread for monitoring many sockets, to increase the likelihood of the thread having some actual work to do. The Selector API does this but is notoriously challenging to program well. Instead, developers use frameworks like Netty which abstract some of NIO's complexity and layer on some best practices.
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An investigative journey through concurrent data structures
DirectByteBuffer exhibits an intriguing behavior: it deallocates its backing memory during the finalization process, which occurs after garbage collection (GC) cycles. This poses an issue if your system is conservative with on-heap allocations, leading to infrequent GC cycles. In such cases, there could be a significant delay between the time the memory becomes unreferenced and when it is actually deallocated. This behavior could, in some respects, mimic a memory leak.
This is why some libraries hacks into DirectByteBuffer to deallocate memory explicitly, bypassing the finalizer altogether. For instance, the Netty library has implemented such a workaround, see Netty as an [example](https://github.com/netty/netty/blob/795db4a866401aa172757b95...).
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Scaling to ~15K requests per second with Java – Part 1
Apologies replying to myself, but Netty, which underpins many of the popular Java backend frameworks, see backward compatibility as more important than supporting green threads.
https://github.com/netty/netty/issues/12816
It'll be interesting to see who (if anyone) picks up Netty's mantle in the Project Loom world.
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Netty VS java-http - a user suggested alternative
2 projects | 25 May 2023
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Is jre17 the problem? How do I get an old eclipse? Error: Could not find or load main class netty.DiscardServer Caused by: java.lang.ClassNotFoundException: netty.DiscardServer
Looks fairly recent so I'm glad I had a pre oct22 build https://github.com/netty/netty/issues/12737
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What are your (favourite) Java best practices, personal tips, hints or just underrated stuff in general?
This is better? https://github.com/netty/netty/blob/4.1/pom.xml
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Lessons learned from picking a Java driver for Amazon ElastiCache for Redis - Part 2
Given the fact that Lettuce is built with Netty, we also immediately noticed quite an impact on the initialization time (cold start) of our lambda function. Netty is really fast while executing, but takes a bit of time to initialize. The new Lambda Snapstart functionality might help with that.
What are some alternatives?
nanohttpd - Tiny, easily embeddable HTTP server in Java.
Undertow - High performance non-blocking webserver
spring-data-relational - Spring Data Relational. Home of Spring Data JDBC and Spring Data R2DBC.
OkHttp - Square’s meticulous HTTP client for the JVM, Android, and GraalVM.
jodd-json - JSON Java serializer and parser.
gRPC - The Java gRPC implementation. HTTP/2 based RPC
FrameworkBenchmarks - Source for the TechEmpower Framework Benchmarks project
Grizzly
netty-websocket-broadcast-example - An example WebSocket broadcast server using Netty
KryoNet - TCP/UDP client/server library for Java, based on Kryo
maplibre-gl-js - MapLibre GL JS - Interactive vector tile maps in WebGL2
MINA - Mirror of Apache MINA