1. A method for configuring an operator graph to process a high-volume continuous stream of events, said method comprising: defining, by a subscriber machine, an object to include an expression, said expression representing a function to be performed on events from an event stream; generating, by the subscriber machine, an abstract syntax tree corresponding to the object; serializing, by the subscriber machine, the generated abstract syntax tree into a message; and sending, by the subscriber machine, the message including a query representing the object to a destination machine, said destination machine being one of a plurality of destination machines, wherein the expression is configured to be compiled by the destination machine from the abstract syntax tree into executable code to be executed by the designation machine on events received from the event stream.