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#WSO2 Carbon Kernel

WSO2 Carbon redefines middleware by providing an integrated and componentized middleware platform that adapts to the specific needs of any enterprise IT project - on premise or in the cloud. 100% open source and standards-based, WSO2 Carbon enables developers to rapidly orchestrate business processes, compose applications and develop services using WSO2 Developer Studio and a broad range of business and technical services that integrate with legacy, packaged and SaaS applications.

WSO2 Carbon kernel, the lean, modular, OSGi-based platform, is the base of the WSO2 Carbon platform. It is a composable server architecture which inherits modularity and dynamism from OSGi framework. WSO2 Carbon kernel can be considered as a framework for server development. All the WSO2 products are composed as a collection reusable components running on this kernel. These products/components inherits all the core services provided by Carbon kernel such as Registry/repository, User management, Transports, Caching, Clustering, Logging, Deployment related features.

##Key Features

  • Composable Server Architecture - Provides a modular, light-weight, OSGi-based server development framework.
  • Carbon Application(CApp) deployment support.
  • Multi-Profile Support for Carbon Platform - Enables a single product to run on multiple modes/profiles.
  • Carbon + Tomcat JNDI Context - Provides ability to access both carbon level and tomcat level JNDI resources to applications using a single JNDI context.
  • Distributed Caching and Clustering functionality - Provides a distributed cache and clustering implementation which is based on Hazelcast- a group communication framework
  • Pluggable Transports Framework - Based on Axis2 transports module.
  • Registry/Repository API- Provides core registry/repository API for component developers.
  • User Management API - Provides a basic user management API for component developers.
  • Logging - Supports both Java logging as well as Log4j. Logs from both these sources will be aggregated to a single output
  • Pluggable artifact deployer framework - Can be extended to deploy any kind of artifacts such as Web services, Web apps, Business processes, Proxy services, User stores etc.
  • Deployment Synchronization - Provides synchronization of deployed artifacts across a product cluster.
  • Ghost Deployment - Provides a lazy loading mechanism for deployed artifacts
  • Multi-tenancy support - The roots of the multi-tenancy in Carbon platform lies in the Carbon kernel. This feature includes tenant level isolation as well as lazy loading of tenants.

##New Features

  • Java7/Java8 support - Starting from kernel 4.4.0 release, the kernel can now be compiled and run on both Java7 and Java8.
  • Tomcat upgrade - Tomcat is upgraded to version 7.0.59.
  • Tenant Eager Loading - WSO2 Carbon Kernel can now be configured to load specified set of tenants at server start-up.

##How to Contribute

##Contact us

WSO2 Carbon developers can be contacted via the mailing lists: