[infinispan-dev] S3_PING and GOOGLE_PING deprecated

[Bela Ban]

Hi folks,

I've deprecated S3_PING [1] and GOOGLE_PING [3]. The replacements are 
NATIVE_S3_PING [2] and GOOGLE_PING2 [4].

S3_PING started out as a copy of sample code by Amazon a long time ago, 
and - because I never wanted Amazon's dependencies - is quite fat, as it 
contains a bunch of dependent classes.

While Amazon's client code has evolved and become more robust, S3_PING 
has never changed much, so I suspect it contains a number of bugs and is 
possibly also not very efficient.

GOOGLE_PING is a subclass of S3_PING and uses Google's AWS compatibility 
library. Thus, GOOGLE_PING inherits all of S3_PING's deficiencies.

A couple of week's ago, I therefore created NATIVE_S3_PING (a port of 
Zalando's original protocol of the same name for 3.x), which uses the 
AWS client SDK to access S3 storage.

This week, I also committed a first version of GOOGLE_PING2, which doe 
not extend S3_PING any longer, but instead uses Google's client library 
to access Google Cloud Storage directly.

The benefit of using an official client library instead of the 
copy&paste kludge that's called S3_PING is that client libs are 
maintained / updated / offer new functionality / yada yada yada.

Since both protocols have depedencies, they're located in the 
jgroups-extras repo (https://github.com/jgroups-extras). I want to core 
JGroups repo to be free of any dependencies.

S3_PING and GOOGLE_PING will be removed from JGroups in the next major 
version (5.x).

If you have any concerns that functionality currently present in either 
S3_PING or GOOGLE_PING is not available in NATIVE_S3_PING or 
GOOGLE_PING2, let me know.

Cheers,

[1] http://www.jgroups.org/manual4/index.html#_s3_ping
[2] https://github.com/jgroups-extras/native-s3-ping
[3] http://www.jgroups.org/manual4/index.html#_google_ping
[4] https://github.com/jgroups-extras/jgroups-google