We are writing a framework around the AbstractAssembler
interface. However, we need to throw different database exceptions
so the client can get a decent error message about what went wrong.
This was not a problem when writing sync functions because they
were not tied to a specific interface. When we extend
AbstractAssembler, the compiler does not let us implement methods
which throw any exceptions. There should be a mechanism for sending
an intelligent error message from the server back to the
client.
