Infrastructure

The serialVersion in SystemMetadata allows for consistency between updates of systemMetadata

systemMetadata can only be updated on the CN
systemMetadata is managed by Hazelcast

Every operation that manipulated SystemMetadata on the CN will follow the pattern:

lock(); get(); increment(); put(); unlock();

if (hzSystemMetadata.tryLock(pid, 500L, TimeUnit.MILLISECONDS)) {
Systemmetadata systemMetadata = hzSystemMetadata.get(pid);
do something here

  systemMetadata.setSerialVersion
                (systemMetadata.getSerialVersion().add(BigInteger.ONE));
  hzSystemMetadata.put(systemMetadata);
  hzSystemMetadata.unlock(pid);

}

and of course you'll want the above in a try catch block too, so that if an exception is raised, a lock will still be released

Locking will be performed on the hzSystemMetadata HazelcastMap

Get will be performed against the hzSystemMetadata HazelcastMap

increment is an operation performed on the SystemMetadata.serialVersion.

Put will be performed against the hzSystemMetadata HazelcastMap

Unlocking will be performed on the Hazelcast Lock structure