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Motivation: The Java version is used for platform dependent logic. Yet, the logic for acquiring the Java version requires special permissions (the runtime permission "getClassLoader") that some downstream projects will never grant. As such, these projects are doomed to have Netty act is their Java major version is six. While there are ways to maintain the same logic without requiring these special permissions, the logic is needlessly complicated because it relies on loading classes that exist in version n but not version n - 1. This complexity can be removed. As a bonanza, the dangerous permission is no longer required. Modifications: Rather than attempting to load classes that exist in version n but not in version n - 1, we can just parse the Java specification version. This only requires a begign property (property permission "java.specification.version") and is simple. Result: Acquisition of the Java version is safe and simple.
Netty Project
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.
Links
How to build
For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.
You require the following to build Netty:
- Latest stable Oracle JDK 7
- Latest stable Apache Maven
- If you are on Linux, you need additional development packages installed on your system, because you'll build the native transport.
Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.
Branches to look
Development of all versions takes place in each branch whose name is identical to <majorVersion>.<minorVersion>. For example, the development of 3.9 and 4.0 resides in the branch '3.9' and the branch '4.0' respectively.