Patent ID: 7343368

Claim:
A computer implemented method for propagation of filter expressions across multi-layered systems, the computer implemented method comprising: receiving, at a first data processing engine, a data request from an application; transmitting the data request with a portion of a specified selection criteria expression that is compatible with a set of selection criteria expressions of a second data processing engine to the second data processing engine, wherein the second data processing engine determines whether a message received at the second data processing engine matches the portion of the specified selection criteria expression that is compatible with the set of selection criteria expressions of the second data processing engine, and, if the message received at the second data processing engine matches the portion of the specified selection criteria expression that is compatible with the set of selection criteria expressions of the second data processing engine, transmits the message to the first data processing engine; determining whether the message matches a portion of the specified selection criteria expression that is incompatible with the set of selection criteria expressions of the second data processing engine; and if the message matches a portion of the specified selection criteria expression that is incompatible with the set of selection criteria expressions of the second data processing engine, transmitting the message to the application.