luxun | subscribe messaging system based on memory mapped file | Architecture library

by bulldog2011 Java Version: Current License: Apache-2.0

kandi X-RAY | luxun Summary

luxun is a Java library typically used in Architecture applications. luxun has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.

A high-throughput, distributed, publish-subscribe messaging system. Luxun is inspired by Apache Kafka. The main design objectives of Luxun are the following:. The objectives above makes Luxun extremely suitable for nowadays popular big data or activity stream collecting and analytics. Luxun is based on the bigqueue library which uses memory mapped file internally to support fast while persistent queue operations.

Support

Quality

Security

License

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kandi-support Support

luxun has a low active ecosystem.
It has 150 star(s) with 40 fork(s). There are 22 watchers for this library.
It had no major release in the last 6 months.
There are 6 open issues and 1 have been closed. There are 1 open pull requests and 0 closed requests.
It has a neutral sentiment in the developer community.
The latest version of luxun is current.

luxun Support

Best in #Architecture

Average in #Architecture

luxun Support

Best in #Architecture

Average in #Architecture

quality kandi Quality

luxun has 0 bugs and 0 code smells.

luxun Quality

Best in #Architecture

Average in #Architecture

luxun Quality

Best in #Architecture

Average in #Architecture

security Security

luxun has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
luxun code analysis shows 0 unresolved vulnerabilities.
There are 0 security hotspots that need review.

luxun Security

Best in #Architecture

Average in #Architecture

luxun Security

Best in #Architecture

Average in #Architecture

license License

luxun is licensed under the Apache-2.0 License. This license is Permissive.
Permissive licenses have the least restrictions, and you can use them in most projects.

luxun License

Best in #Architecture

Average in #Architecture

luxun License

Best in #Architecture

Average in #Architecture

build Reuse

luxun releases are not available. You will need to build from source code and install.
Build file is available. You can build the component from source.
luxun saves you 10141 person hours of effort in developing the same functionality from scratch.
It has 20637 lines of code, 2059 functions and 178 files.
It has medium code complexity. Code complexity directly impacts maintainability of the code.

luxun Reuse

Best in #Architecture

Average in #Architecture

luxun Reuse

Best in #Architecture

Average in #Architecture

Top functions reviewed by kandi - BETA

kandi has reviewed luxun and discovered the below as its top functions. This is intended to give you an instant insight into luxun implemented functionality, and help decide if they suit your requirements.

Process events .

The main entry point .

Perform a produce request .

Dequeues items from the queue .

Tries to load the Hx4j .

Creates a map of streams based on topic number .

Handles a consume response .

Connect to the server .

Compares this producer with the specified value .

Collate queue items .

Get all kandi verified functions for this library.

luxun Key Features

Fast: close to the speed of direct memory access, both produding and consuming are close to O(1) memory access.

Persistent : all data in the system is persisted on disk and is crash resistant.

High-throughput: even with modest hardware Luxun can support handreds of thousands of messages per second.

Realtime : messages produced by producer threads should be immediately visible to consumer threads.

Distributed : explicit support for partitioning messages over Luxun servers and distributing consumption over a cluster of consumer machines while maintaining per-partition ordering semantics.

Multiple clients support : use Thrift RPC as communication infrastructure, easy to generate different clients for different platforms.

Flexible consuming semantics : supports typical consume once queue, fan out queue, even supports consume by index when needed.

luxun Examples and Code Snippets

Community Discussions

Trending Discussions on luxun

Is it possible to put lambda expressions into a map or list in C++?

Trending Discussions on luxun

QUESTION

Is it possible to put lambda expressions into a map or list in C++?

Asked 2020-May-23 at 11:24

@DanielLangr @luxun @cdhowie sorry for the XY problem. i am not sure i can explain well, but i try my best. the situation is almost like this: there is a base object "Worker" and some children. chef、tailor... children has the same action like walk、run、sleep...but different skill,chef can make food, tailor can Make clothes. Invoker call Worker dothings but do not exactly know their profession.so i add a interface dothings(Thing) on Worker the base object. Thing is an enum,value is MakeFood、MakeClothes...

Worker *w = new Chef();
w->dothings(MakeFood);//
w->dothings(MakeClothes);//throw exception "w do not have skill"

so i think meybe use a container in children that describe what it can do and how to do.

hope i explained clearly.and is there a better solution?

I want to put different lambda expressions into a list or Qmap, like below.

Qmap<String, lambda> map;
map.insert("first",[](int i) -> int {return i;});
map.insert("second",[](string s) -> string {return s;});

Is it possible in C++? And what is the type of lambda?

ANSWER

Answered 2020-May-23 at 09:21

It is possible but using function wrapper.

For example,

std::map<std::string, std::function<void(std::string)>> my_map;
my_map.emplace("first", [](std::string i) { std::cout << i << std::endl; });

However, if you want to pass any type of argument to your function and return any type from your lambda/function, use boost::any. You also use std::any if you are using C++17 or above.

EDIT:

A working example:

#include <iostream>
#include <string>
#include <functional>
#include <map>
#include <boost/any.hpp>

int main()
{
    auto any = [](boost::any i)
    {
        std::cout << "In any" << std::endl;
        if (i.type() == typeid(int))
            std::cout << boost::any_cast<int>(i) << std::endl;
        return boost::any(1000);
    };
    std::map<std::string, std::function<boost::any(boost::any)>> my_map;
    my_map.emplace("first", any);
    my_map.emplace("second", [](boost::any i) -> boost::any { });
    auto ret = my_map["first"](100);
    std::cout << boost::any_cast<int>(ret) << std::endl;
    return 0;
}

Outputs:

In any
100
1000

Source https://stackoverflow.com/questions/61969316

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install luxun

You can download it from GitHub.
You can use luxun like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the luxun component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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