Cluster configuration [1] is currently serialized with PDX and stored in an internal region that is replicated on all Locators. I would like to change the Configuration class from having a Set<String> jarNames to having a Map<String, byte[]> jarNamesToJarBytes. However, this would create a problem when a Locator running the new version of the software tries to deserialize an instance of the previous version of the Configuration class.
Basically, inside Configuration’s fromData() method, I would like to determine whether the serialized instance came from a version of the class with a Set or a version of the class with a Map. However, I don’t see methods in DataSerializer to check for the existence of a particular field name or field type. Does anyone know of a strategy that has been used in the past to make these sort of changes? Thank you, Jared [1] org.apache.geode.management.internal.configuration.domain.Configuration
