Support for partially random expiration

[GoogleCodeExporter]

When rolling out an upgrade to a cluster of Guava powered instances there's a 
risk that local caches will expire within the same time.

Proposal: Add a method to CacheBuilder that allows for randomization of 
expiration. This will eventually spread expiration evenly over time.

Workaround: Instantiate a Random instance and use it as input to `.expire*` 
method. Cumbersome.

I'd love to hear your input on this.

Original issue reported on code.google.com by jens.ran...@tink.se on 24 Jul 2014 at 11:24

[GoogleCodeExporter]

This issue has been migrated to GitHub.

It can be found at https://github.com/google/guava/issues/<issue id>

Original comment by cgdecker@google.com on 1 Nov 2014 at 4:08

• Added labels: MigratedToGitHub

[GoogleCodeExporter]

Original comment by cgdecker@google.com on 1 Nov 2014 at 4:17

• Changed state: Migrated

[GoogleCodeExporter]

Original comment by cgdecker@google.com on 3 Nov 2014 at 9:07

• Added labels: Restrict-AddIssueComment-Commit