Advance spring-session-hazelcast to use latest features

[neilstevenson]

Expected Behavior

spring-session-hazelcast should be modified to use latest features of Hazelcast, so that is easier to deploy.

Current Behavior

For example, #1131
The EntryProcessor is based on java.io.Serializable and better serialization mechanisms exist.

Context
Will record the details once known, but want to have a placeholder so as not to accidentally overlap with other work that may be ongoing.

[neilstevenson]

Please can you assign to me

[marcusdacoregio]

Hi @neilstevenson, thanks for volunteering, this issue is now assigned to you. Please share the implementation details before going deep into it. We must align what we can do without breaking backward compatibility.

[neilstevenson]

After (finally) getting round to reviewing this, I'm wondering if a better way exists.

The problem is Map<String, Object> sessionAttrs

Given the value is Object then a general purpose serializer is needed.

I'm close. If I do think of a better way I'll reopen