On 1/12/07, Sergiu Dumitriu <sergiu.dumitriu(a)gmail.com> wrote:
  Hi,
 We're trying to make XWiki work in 1.4 again. Currently, there are 2 issues
 blocking this:
 1. The XWiki eXo integration part, which requires eXo, which requires J1.5.
 This will be transformed into an optional component, so eXo will not block
 the build on 1.4 platforms.
 2. The recently introduced ConcurrentHashMap, that prevents a deadlock, and
 which is part of J1.5. We're looking for a library that provides the same
 functionality, but compiles in J1.4
 
This is a backport of JSR 166 (java.util.concurrent) to Java 1.4:
http://dcl.mathcs.emory.edu/util/backport-util-concurrent/