AeronCluster.java decoding order issue about aeron

[vyazelenko]

Since SBE 1.30.0 it is possible to enable runtime checks that will enforce access order.
There is no issues with the above code as the messages are the leadership messages are not going to be frequent and the fixed fields are likely to be in the same cache line anyway.

[vyazelenko]

@ssh352 Fields within a fixed block can be accessed in any order since they all have fixed offset. The order of access matters when accessing variable length fields and repeating groups.

[ssh352]

@vyazelenko It is probably not a big deal here. But even for fixed size field it is advised (I understand it is ok if not) to decode in schema order. Thanks!

https://github.com/real-logic/simple-binary-encoding/wiki/Design-Principles#streaming-access

The SBE codecs are designed to encode and decode messages based on a forward progression of the position in the underlying buffer. It is possible to backtrack to a degree within messages but this is highly discouraged from a performance and latency perspective.