Re: SimpleSession to JSON - and back?

[John Moore]

Les, thanks for your very timely response. Since posting the earlier 
JSON message I figured I'd just try doing straight object serialization 
to a ByteArrayOutputStream and Base64 encoding the byte array, 
forgetting about JSON, and I'd just got that working nicely when I read 
your response (although I used standard Groovy stuff and not the Shiro 
utilities, which I was unaware of). I may well go down that path as in 
reality I have no real requirement for the human-readability of the 
stored session objects which JSON would provide.

You're right about Shiro hitting the session cache frequently - I traced 
a request and was surprised how often the 'get' method of Cache is 
called. Redis is blindingly fast but you're right, the network round 
trips would be best avoided. Isn't there some staleness risk in using a 
local in-memory cache, though?