A computer program product comprises a computer useable medium. The computer useable medium has a computer readable program such that when the computer readable medium is executed on a computer, the computer is caused to configure an adapter such that the adapter is specific to a data source, provides a communication link to the data source, converts a format of the data source to a format native to a middleware system, and converts a format of metadata of the data source to a standard metadata format. Further, the computer is caused to configure an application interface component to convert an invocation of a function in the middleware system to an invocation of a function provided by an Enterprise Information System through the adapter, convert the data format of the middleware system to a format native to the Enterprise Information System accessed through the adapter, and maintain metadata describing a message format and a function provided by the adapter.