Is it possible to get the same instance of an object when querying Morphia. This is the query which I am currently performing to find ServerInstances in my database.
Database.get().getDatastore().find(ServerInstance.class).field("_id").equal(id).get()
The Database.get().getDatastore() returns the Morphia datastore that I created earlier.
If I run the Query twice, both of the results are different. This is an issue, where I have used the original instance in a Map, for example. I have thought about updating the ServerInstance#equals(Object obj) method to match objects with matching ids, however this is probably not a good idea. There is also the fact that I update some @Transient fields on the first instance, meaning that both instances are no longer the same.
I have thought about creating a local cache for these objects, however the querying system used by Morphia is much nicer than having to write my own checks for matching objects.
Essentially, what I want to know is, if Morphia has it's own local caching system that I could use, or a better way to cache the objects so that I can continue to use the Morphia querying system.
Thanks in advance!
Morphia doesn't currently have a caching mechanism like that, no. Given the complexities of something like that, it's unlikely to make it in to morphia proper. You could front it with something like ehcache, though.