Class loading using java data cartridges

摘要

Techniques for loading Java classes referenced in a continuous query. In one set of embodiments, the Java classes can be loaded based on a class space defined for an application considered to be in scope for the query. In another set of embodiments, the Java classes can be loaded based on a server class space that includes all exported classes visible to the event processing system executing the query.

主权项

1. A method comprising:
receiving, by a computer system, executable instructions for a first query that an invocation of a first method, expressed in a first programming language; receiving, by the computer system, executable instructions for a second query that includes an expression that specifies an invocation of a second method expressed in a second programming language that differs from the first programming language; and executing, by the computer system, the executable instructions for the first and second queries in the context of an application; wherein a first repository contains metadata specifying a compile-time component for a first programmatic class that includes the first method; wherein a second repository, separate from the first repository, contains metadata specifying a compile-time component for a second programmatic class that includes the second method; reading, during a compilation process, context information specified in the metadata contained in the first repository; and passing, by a runtime engine, following the compilation process, the context information in the invocation of the first method.