backport-util-concurrent

http://backport-jsr166.sourceforge.net/

 

This package is the backport of java.util.concurrent API, introduced in Java 5.0 and further refined in Java 6.0, to older Java platforms. The backport is based on public-domain sources from the JSR 166 CVS repository , the dl.util.concurrent package, and the Doug Lea's collections package.

The ambition of this project is to provide a concurrency library that works with uncompromised performance on all Java platforms currently in use, allowing development of fully portable concurrent applications. More precisely, the traget scope is Java 1.3 and above, and some limited support if offered for Java 1.2.

The backport is close to complete; unsupported functionality is limited to: 1) classes that rely on explicit JVM support and cannot be emulated at a satisfactory performance level on platforms before 5.0, 2) some of the functions described in the original javadoc as "designed primarily for use in monitoring in system state, not for synchronization control".

The ultimate purpose of the backport is to enable gradual migration to java.util.concurrent. In a perfect world, everybody would instantly and simultaneously upgrade to Java 6.0 once it comes out. In reality, many people are, for various reasons, still stuck to older platforms. The backport allows them to use the JSR 166 goodies without upgrading just yet. And once they are ready to switch, their concurrency code will require only very minor modifications, such as changing the import statements.