"unl" unlock operation is not implemented on MembaseClient about spymemcached HOT 9 CLOSED

set shouldn't be able to unlock a key in Membase. Each lock in Membase has a 
timeout and I think what you are seeing here is that lock expiring.

I will add it to the tak list for 2.8, but at the moment I can't make any 
promises that I will get around to adding it. What do you plan on using it for?

So there are use cases where you might call "getl" to retrieve an object, but 
you wind up never saving that object for whatever reason (happens pretty 
often).  So in order to properly use "getl", you also need to be able to use 
"unl" which unlocks a key.  You only use "unl" in cases where you've previously 
called "getl" and failed to call "cas".

Internally at Zynga our "set" operation does what the "cas" operation does in 
spymemcache (which unlocks a key that was previously locked).

I have already implemented this change as well as a few other changes so I can 
use these features at Zynga.  I'll try to submit a diff of this once I've 
tested things out.

Patch file attached which includes fix for the missing unlock operation.

Brent,

We just added unl to Spymemcached. Thanks for submitting this patch, there was 
a little but of code missing but we filled in the blanks. I just wanted to let 
you know that unl will not appear in MemcachedClient since standard memcached 
doesn't technically support unl. We did add them in CouchbaseClient however 
which is a part of the ne Couchbase Client project. I know this won't work for 
your specific use case so what you will probably have to do is extend 
MemcachedClient and add in the function definitions. Let me know if you have 
any trouble doing this and thanks again for contributing the code.

Mike I don't understand where the MembaseClient.java is now... Brent, where or 
what is the ne Couchbase Client Project?

We decided that Spymemcached should be just for memcached and that we should 
have a separate project for people who want to use Membase/Couchbase. As a 
result we created the Couchbase Client project which is based on Spymemcached. 
At a high level we just moved all of the code for Membase/Couchbase out of 
Spymemcached and eliminated the MembaseClient class. If you were using 
MembaseClient you should now be using Couchbase Client.

Also, he unl changes are part of Spymemcached, but we have not released an 
official version with the changes yet.

See couchbase.com/develop/java/current for more on the couchbase java client

I wanted to find the source code. But finally I found it here:

http://review.couchbase.org/gitweb?p=couchbase-java-client.git;a=tree

There the getAndLock and unlock methods are implemented. 

Thank you very much!

The authoritative place for the source is: 
https://github.com/couchbase/couchbase-java-client

An update should be released soon with unlock support.

Closing this, as it's tracked in a different project.