Configurable Tomcat Session Key Prefix for Redis

[faisalbegins]

Currently there is no way to customise tomcat session key for redis, which is always "redisson_tomcat_session:" + sessionId.

But in environment where multiple tomcat instances are using same redis cluster in it not possible to distinguish different tomcat instances.

In this pull request I have added configuration option for tomcat session key prefix, while configuring session manager use following configuration to customise tomcat session key prefix.

<Manager className="org.redisson.tomcat.RedissonSessionManager" configPath="${catalina.base}/redisson.conf" readMode="MEMORY" updateMode="DEFAULT" keyPrefix="this_is_a_test_prefix"/>

this will allow redisson to store tomcat session keys using following keys

this_is_a_test_prefix:redisson_tomcat_session:E61653A9FEE61CB5D0967C2C40451363

[mrniko]

Hi! Thank you for your contribution. Could you change keySpace to keyPrefix?

[faisalbegins]

@mrniko I've updated "keySpace" to "keyPrefix".

[mrniko]

Thanks for contribution!

[hanschua]

@devel83 the implementation seems to be missing a colon

The example will result to this_is_a_test_prefixredisson_tomcat_session:E61653A9FEE61CB5D0967C2C40451363

[mrniko]

#1321 (comment)

@devel83 could you please fix it ?

[faisalbegins]

@mrniko @hans123456 I opt out colon intentionally. I was thinking users will put colon themselves, but looks like that was a wrong idea. I will add colon.

[faisalbegins]

@mrniko created a pull request for this fix (#1336)