1186 Repositories
Java classes-and-objects Libraries
Replicate your Key Value Store across your network, with consistency, persistance and performance.
Chronicle Map Version Overview Chronicle Map is a super-fast, in-memory, non-blocking, key-value store, designed for low-latency, and/or multi-process
High Performance data structures and utility methods for Java
Agrona Agrona provides a library of data structures and utility methods that are a common need when building high-performance applications in Java. Ma
The JTS Topology Suite is a Java library for creating and manipulating vector geometry.
JTS Topology Suite The JTS Topology Suite is a Java library for creating and manipulating vector geometry. It also provides a comprehensive set of geo
Event capture and querying framework for Java
Eventsourcing for Java Enabling plurality and evolution of domain models Instead of mutating data in a database, Eventsourcing stores all changes (eve
Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
JetBrains Xodus is a transactional schema-less embedded database that is written in Java and Kotlin. It was initially developed for JetBrains YouTrack
jdbi is designed to provide convenient tabular data access in Java; including templated SQL, parameterized and strongly typed queries, and Streams integration
The Jdbi library provides convenient, idiomatic access to relational databases in Java. Jdbi is built on top of JDBC. If your database has a JDBC driv
CrateDB is a distributed SQL database that makes it simple to store and analyze massive amounts of machine data in real-time.
About CrateDB is a distributed SQL database that makes it simple to store and analyze massive amounts of machine data in real-time. CrateDB offers the
ObjectBox is a superfast lightweight database for objects
ObjectBox Java (Kotlin, Android) ObjectBox is a superfast object-oriented database with strong relation support. ObjectBox is embedded into your Andro
MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
MapDB: database engine MapDB combines embedded database engine and Java collections. It is free under Apache 2 license. MapDB is flexible and can be u
OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text, Geospatial and Key-Value models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries. OrientDB Community Edition is Open Source using a liberal Apache 2 license.
OrientDB | Develop branch: | 2.2.x branch: | Chat with the community: What is OrientDB? OrientDB is an Open Source Multi-Model NoSQL DBMS with the sup
A blazingly small and sane redis java client
Jedis Jedis is a blazingly small and sane Redis java client. Jedis was conceived to be EASY to use. Jedis is fully compatible with redis 2.8.x, 3.x.x
Eclipse Jetty® - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more
Eclipse Jetty Canonical Repository This is the canonical repository for the Jetty project, feel free to fork and contribute now! Submitting a patch or
Flexible framework for workflow and decision automation with BPMN and DMN. Integration with Spring, Spring Boot, CDI.
Camunda Platform - The open source BPMN platform Camunda Platform is a flexible framework for workflow and process automation. It's core is a native B
Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.
Activiti Homepage: http://activiti.org Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people,
Distributed Stream and Batch Processing
What is Jet Jet is an open-source, in-memory, distributed batch and stream processing engine. You can use it to process large volumes of real-time eve
BitTorrent library and client with DHT, magnet links, encryption and more
Bt A full-featured BitTorrent implementation in Java 8 peer exchange | magnet links | DHT | encryption | LSD | private trackers | extended protocol |
Build highly concurrent, distributed, and resilient message-driven applications on the JVM
Akka We believe that writing correct concurrent & distributed, resilient and elastic applications is too hard. Most of the time it's because we are us
Redisson - Redis Java client with features of In-Memory Data Grid. Over 50 Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Publish / Subscribe, Bloom filter, Spring Cache, Tomcat, Scheduler, JCache API, Hibernate, MyBatis, RPC, local cache ...
Redisson - Redis Java client with features of In-Memory Data Grid Quick start | Documentation | Javadocs | Changelog | Code examples | FAQs | Report a
Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.
Hystrix: Latency and Fault Tolerance for Distributed Systems Hystrix Status Hystrix is no longer in active development, and is currently in maintenanc
Utility for developers and QAs what helps minimize time wasting on writing the same data for testing over and over again. Made by Stfalcon
Stfalcon Fixturer A Utility for developers and QAs which helps minimize time wasting on writing the same data for testing over and over again. You can
jetbrick utility classes
jetbrick-commons This is an utility classes project for jetbrick framework. Documentation http://subchen.github.io/ Dependencies dependency gro
Dex : The Data Explorer -- A data visualization tool written in Java/Groovy/JavaFX capable of powerful ETL and publishing web visualizations.
Dex Dex : The data explorer is a powerful tool for data science. It is written in Groovy and Java on top of JavaFX and offers the ability to: Read in
Object-Oriented Java primitives, as an alternative to Google Guava and Apache Commons
Project architect: @victornoel ATTENTION: We're still in a very early alpha version, the API may and will change frequently. Please, use it at your ow
Lightweight analysis tool for detecting mutability in Java classes
What is Mutability Detector? Mutability Detector is designed to analyse Java classes and report on whether instances of a given class are immutable. I
JVM version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.
pact-jvm JVM implementation of the consumer driven contract library pact. From the Ruby Pact website: Define a pact between service consumers and prov
A Java architecture test library, to specify and assert architecture rules in plain Java
ArchUnit is a free, simple and extensible library for checking the architecture of your Java code. That is, ArchUnit can check dependencies between pa
Generator fake objects from a template
Fixture Factory is a tool to help developers quickly build and organize fake objects for unit tests. The key idea is to create specification limits of
A library for setting up Java objects as test data.
Beanmother Beanmother helps to create various objects, simple and complex, super easily with fixtures for testing. It encourages developers to write m
Serenity BDD is a test automation library designed to make writing automated acceptance tests easier, and more fun.
That feeling you get when you know you can trust your tests Serenity BDD is a library designed to make writing automated acceptance tests easier, and
A modern testing and behavioural specification framework for Java 8
Introduction If you're a Java developer and you've seen the fluent, modern specification frameworks available in other programming languages such as s
Library that allows tests written in Java to follow the BDD style introduced by RSpec and Jasmine.
J8Spec J8Spec is a library that allows tests written in Java to follow the BDD style introduced by RSpec and Jasmine. More details here: j8spec.github
Toolkit for testing multi-threaded and asynchronous applications
ConcurrentUnit A simple, zero-dependency toolkit for testing multi-threaded code. Supports Java 1.6+. Introduction ConcurrentUnit was created to help
Java 8 optimized, memory efficient, speedy template engine producing statically typed, plain java objects
Rocker Templates by Fizzed Fizzed, Inc. (Follow on Twitter: @fizzed_inc) Sponsored by Rocker is proudly sponsored by Greenback. We love the service an
jte is a secure and lightweight template engine for Java.
jte is a secure and lightweight template engine for Java. All jte templates are compiled to Java class files, meaning jte adds essentially zero overhe
A Java library for serializing objects as PHP serialization format.
Java PHP Serializer Latest release: A Java library for serializing objects as PHP serialization format. The library fully implements the PHP serializa
Java binary serialization and cloning: fast, efficient, automatic
Kryo is a fast and efficient binary object graph serialization framework for Java. The goals of the project are high speed, low size, and an easy to u
Apache Lucene and Solr open-source search software
Apache Lucene and Solr have separate repositories now! Solr has become a top-level Apache project and main line development for Lucene and Solr is hap
Free and Open, Distributed, RESTful Search Engine
Elasticsearch A Distributed RESTful Search Engine https://www.elastic.co/products/elasticsearch Elasticsearch is a distributed RESTful search engine b
Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.
Tink A multi-language, cross-platform library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse. Ubuntu
Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.
Themis provides strong, usable cryptography for busy people General purpose cryptographic library for storage and messaging for iOS (Swift, Obj-C), An
Password4j is a user-friendly cryptographic library that supports Argon2, Bcrypt, Scrypt, PBKDF2 and various cryptographic hash functions.
Password4j is a Java user-friendly cryptographic library for hashing and checking passwords with different Key derivation functions (KDFs) and Cryptog
A small and easy-to-use one-time password generator library for Java according to RFC 4226 (HOTP) and RFC 6238 (TOTP).
OTP-Java A small and easy-to-use one-time password generator for Java according to RFC 4226 (HOTP) and RFC 6238 (TOTP). Table of Contents Features Ins
A system for distributing and managing secrets
Keywhiz Keywhiz is a system for distributing and managing secrets. For more information, see the website. Our Protecting infrastructure secrets with K
Java binding to the Networking and Cryptography (NaCl) library with the awesomeness of libsodium
kalium - Java binding to the Networking and Cryptography (NaCl) library A Java binding to Networking and Cryptography library by Daniel J. Bernstein.
Java JWT: JSON Web Token for Java and Android
Java JWT: JSON Web Token for Java and Android JJWT aims to be the easiest to use and understand library for creating and verifying JSON Web Tokens (JW
Simple full text indexing and searching library for Java
indexer4j Simple full text indexing and searching library for Java Install Gradle repositories { jcenter() } dependencies { compile 'com.haeun
Java dataframe and visualization library
Tablesaw Overview Tablesaw is Java for data science. It includes a dataframe and a visualization library, as well as utilities for loading, transformi
JGraphX - Library for visualizing (mainly Swing) and interacting with node-edge graphs.
JGraphX This project is end of life. We don't properly support Maven or publish to Maven Central. If that's an issue, use https://github.com/vlsi/jgra
modular and modern graph-theory algorithms framework in Java
Erdos is a very light, modular and super easy to use modern Graph theoretic algorithms framework for Java. It contains graph algorithms that you can a
Minimalist Java framework for rapidly creating scalable, containerless, RESTful microservices. Ship a production-quality, headless, RESTful API in the shortest time possible. Uses Netty for HTTP, Jackson for JSON, Metrics for metrics, properties files for configuration. Sub-projects and plugins enable, NoSQL, Swagger, Auth0, HAL integration, etc.
RestExpress is a thin wrapper on the JBOSS Netty HTTP stack to provide a simple and easy way to create RESTful services in Java that support massive I
Rest.li is a REST+JSON framework for building robust, scalable service architectures using dynamic discovery and simple asynchronous APIs.
Rest.li is an open source REST framework for building robust, scalable RESTful architectures using type-safe bindings and asynchronous, non-blocking I
Utilities for latency measurement and reporting
LatencyUtils A latency stats tracking package The LatencyUtils package includes useful utilities for tracking latencies. Especially in common in-proce
Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.
JITWatch Log analyser and visualiser for the HotSpot JIT compiler. Video introduction to JITWatch video Slides from my LJC lightning talk on JITWatch
jHiccup is a non-intrusive instrumentation tool that logs and records platform "hiccups" - including the JVM stalls that often happen when Java applications are executed and/or any OS or hardware platform noise that may cause the running application to not be continuously runnable.
jHiccup Written by Gil Tene of Azul Systems, and released to the public domain as explained at http://creativecommons.org/publicdomain/zero/1.0 Versio
OpenPDF is a free Java library for creating and editing PDF files with a LGPL and MPL open source license. OpenPDF is based on a fork of iText. We welcome contributions from other developers. Please feel free to submit pull-requests and bugreports to this GitHub repository. ⛺
OpenPDF is an open source Java library for PDF files OpenPDF is a Java library for creating and editing PDF files with a LGPL and MPL open source lice
An HTML to PDF library for the JVM. Based on Flying Saucer and Apache PDF-BOX 2. With SVG image support. Now also with accessible PDF support (WCAG, Section 508, PDF/UA)!
OPEN HTML TO PDF OVERVIEW Open HTML to PDF is a pure-Java library for rendering arbitrary well-formed XML/XHTML (and even HTML5) using CSS 2.1 for lay
XML/XHTML and CSS 2.1 renderer in pure Java
Flying Saucer OVERVIEW Flying Saucer is a pure-Java library for rendering arbitrary well-formed XML (or XHTML) using CSS 2.1 for layout and formatting
Fast and Easy mapping from database and csv to POJO. A java micro ORM, lightweight alternative to iBatis and Hibernate. Fast Csv Parser and Csv Mapper
Simple Flat Mapper Release Notes Getting Started Docs Building it The build is using Maven. git clone https://github.com/arnaudroger/SimpleFlatMapper.
Java library for representing, parsing and encoding URNs as in RFC2141 and RFC8141
urnlib Java library for representing, parsing and encoding URNs as specified in RFC 2141 and RFC 8141. The initial URN RFC 2141 of May 1997 was supers
ssh, scp and sftp for java
sshj - SSHv2 library for Java To get started, have a look at one of the examples. Hopefully you will find the API pleasant to work with :) Getting SSH
An annotation-based Java library for creating Thrift serializable types and services.
Drift Drift is an easy-to-use, annotation-based Java library for creating Thrift clients and serializable types. The client library is similar to JAX-
Fibers and actors for web development
COMSAT Scalable, Concurrent Web Apps Getting started Add the following Maven/Gradle dependencies: Feature Artifact Servlet integration for defining fi
CogComp's Natural Language Processing libraries and Demos:
CogCompNLP This project collects a number of core libraries for Natural Language Processing (NLP) developed by Cognitive Computation Group. How to use
:chart_with_upwards_trend: Capturing JVM- and application-level metrics. So you know what's going on.
Metrics 📈 Capturing JVM- and application-level metrics. So you know what's going on. For more information, please see the documentation Versions Vers
Automon combines the power of AOP (AspectJ) with monitoring or logging tools you already use to declaratively monitor your Java code, the JDK, and 3rd party libraries.
Automon Automon combines the power of AOP (AspectJ) with monitoring tools or logging tools that you already use to declaratively monitor the following
The missing bridge between Java and native C++
JavaCPP Commercial support: Introduction JavaCPP provides efficient access to native C++ inside Java, not unlike the way some C/C++ compilers interact
The New Official Aparapi: a framework for executing native Java and Scala code on the GPU.
A framework for executing native Java code on the GPU. Licensed under the Apache Software License v2 Aparapi allows developers to write native Java co
The open-source Java obfuscation tool working with Ant and Gradle by yWorks - the diagramming experts
yGuard yGuard is an open-source Java obfuscation tool. With yGuard it is easy as pie ( 🍰 ) to configure obfuscation through an extensive ant task. yG
An extensible Java framework for building XML and non-XML streaming applications
Smooks Framework This is the Git source code repository for the Smooks Project. Build Status Building Pre-requisites JDK 8 Apache Maven 3.2.x Maven gi
A lightweight command processing pipeline ❍ ⇢ ❍ ⇢ ❍ for your Java awesome app.
PipelinR PipelinR is a lightweight command processing pipeline ❍ ⇢ ❍ ⇢ ❍ for your awesome Java app. PipelinR has been battle-proven on production, as
API gateway for REST and SOAP written in Java.
Membrane Service Proxy Reverse HTTP proxy (framework) written in Java, that can be used as an API gateway as a security proxy for HTTP based integrati
Make Slack and Facebook Bots in Java.
JBot Make bots in Java. JBot is a java framework (inspired by Howdyai's Botkit) to make Slack and Facebook bots in minutes. It provides all the boiler
A Java to iOS Objective-C translation tool and runtime.
J2ObjC: Java to Objective-C Translator and Runtime Project site: https://j2objc.org J2ObjC blog: https://j2objc.blogspot.com Questions and discussion:
Fast and reliable message broker built on top of Kafka.
Hermes Hermes is an asynchronous message broker built on top of Kafka. We provide reliable, fault tolerant REST interface for message publishing and a
Powerful event-bus optimized for high throughput in multi-threaded applications. Features: Sync and Async event publication, weak/strong references, event filtering, annotation driven
MBassador MBassador is a light-weight, high-performance event bus implementing the publish subscribe pattern. It is designed for ease of use and aims
Apache Camel is an open source integration framework that empowers you to quickly and easily integrate various systems consuming or producing data.
Apache Camel Apache Camel is a powerful, open-source integration framework based on prevalent Enterprise Integration Patterns with powerful bean integ
A modular and portable open source XMPP client library written in Java for Android and Java (SE) VMs
Smack About Smack is an open source, highly modular, easy to use, XMPP client library written in Java for Java SE compatible JVMs and Android. A pure
Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.
EventBus EventBus is a publish/subscribe event bus for Android and Java. EventBus... simplifies the communication between components decouples event s
Efficient reliable UDP unicast, UDP multicast, and IPC message transport
Aeron Efficient reliable UDP unicast, UDP multicast, and IPC message transport. Java and C++ clients are available in this repository, and a .NET clie
Datumbox is an open-source Machine Learning framework written in Java which allows the rapid development of Machine Learning and Statistical applications.
Datumbox Machine Learning Framework The Datumbox Machine Learning Framework is an open-source framework written in Java which allows the rapid develop
Model import deployment framework for retraining models (pytorch, tensorflow,keras) deploying in JVM Micro service environments, mobile devices, iot, and Apache Spark
The Eclipse Deeplearning4J (DL4J) ecosystem is a set of projects intended to support all the needs of a JVM based deep learning application. This mean
Stream Processing and Complex Event Processing Engine
Siddhi Core Libraries Siddhi is a cloud native Streaming and Complex Event Processing engine that understands Streaming SQL queries in order to captur
tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android
tinylog 2 Example import org.tinylog.Logger; public class Application { public static void main(String[] args) { Logger.info("Hello
Apache Log4j 2 is an upgrade to Log4j that provides significant improvements over its predecessor, Log4j 1.x, and provides many of the improvements available in Logback while fixing some inherent problems in Logback's architecture.
Apache Log4j 2 Apache Log4j 2 is an upgrade to Log4j that provides significant improvements over its predecessor, Log4j 1.x, and provides many of the
The reliable, generic, fast and flexible logging framework for Java.
About logback Thank you for your interest in logback, the reliable, generic, fast and flexible logging library for Java. The Logback documentation can
Free and open source log management
Graylog Welcome! Graylog is an open source log management platform. You can read more about the project on our website and check out the documentation
Logstash - transport and process your logs, events, or other data
Logstash Logstash is part of the Elastic Stack along with Beats, Elasticsearch and Kibana. Logstash is a server-side data processing pipeline that ing
Best-of-breed OpenTracing utilities, instrumentations and extensions
OpenTracing Toolbox OpenTracing Toolbox is a collection of libraries that build on top of OpenTracing and provide extensions and plugins to existing i
P6Spy is a framework that enables database data to be seamlessly intercepted and logged with no code changes to the application.
p6spy P6Spy is a framework that enables database data to be seamlessly intercepted and logged with no code changes to existing application. The P6Spy
An extensible Java library for HTTP request and response logging
Logbook: HTTP request and response logging Logbook noun, /lɑɡ bʊk/: A book in which measurements from the ship's log are recorded, along with other sa
The Java microservice lib. QBit is a reactive programming lib for building microservices - JSON, HTTP, WebSocket, and REST. QBit uses reactive programming to build elastic REST, and WebSockets based cloud friendly, web services. SOA evolved for mobile and cloud. ServiceDiscovery, Health, reactive StatService, events, Java idiomatic reactive programming for Microservices.
QBit Java Micorservices lib tutorials| QBit Website | QBit uses Reakt | QBit works with Vert.x | Reakt Vertx QBit - The Microservice Lib for Java - JS
Opinionated libraries for HTTP&JSON-based RPC using Retrofit, Feign, OkHttp as clients and Jetty/Jersey as servers
Conjure Java Runtime (formerly http-remoting) This repository provides an opinionated set of libraries for defining and creating RESTish/RPC servers a
A powerful flow control component enabling reliability, resilience and monitoring for microservices. (面向云原生微服务的高可用流控防护组件)
Sentinel: The Sentinel of Your Microservices Introduction As distributed systems become increasingly popular, the reliability between services is beco
AWS Service registry for resilient mid-tier load balancing and failover.
Eureka Eureka is a REST (Representational State Transfer) based service that is primarily used in the AWS cloud for locating services for the purpose
Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.
Visit the official web site for more information. Armeria Build a reactive microservice at your pace, not theirs. Armeria is your go-to microservice f
Java CMS engine. Host and develop multiple websites inside a single instance through the GUI and benefit from features like A/B testing, affiliate tracking tools, and a high performance template engine with CSS stylesheets processing & scripts minification.
Free enterprise Java CMS https://ncms.softmotions.com ηCMS features Multiple websites on a single ηCMS application node. Can handle hundreds of simult
ZK is a highly productive Java framework for building amazing enterprise web and mobile applications
ZK ZK is a highly productive Java framework for building amazing enterprise web and mobile applications. Resources Documentation Tutorial ZK Essential
The modular web framework for Java and Kotlin
∞ do more, more easily Jooby is a modern, performant and easy to use web framework for Java and Kotlin built on top of your favorite web server. Java:
Ninja is a full stack web framework for Java. Rock solid, fast and super productive.
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:rocket: Lightning fast and elegant mvc framework for Java8
Based on Java8 + Netty4 to create a lightweight, high-performance, simple and elegant Web framework 😋 Spend 1 hour to learn it to do something intere