memcached in Java

I'm looking for memcached client library for Java. Then I found two libraries.

memcached client for java

memcached client for java is simple and synchronous mamcached client libraries. This is easy to use but not support CAS commands.

spymemcached

spymemcached supports asynchronous processing and CAS commands. Updating cache is high-speed. However implementation is very complex.

I think that many web applications don't require asynchronous cache processing. So I think mamcached client for java is better solution.