Sun GlassFish Enterprise Server v3 Administration Guide

About EIS Connectivity

Enterprise information system (EIS) refers to any system that holds the data of an organization. It can be a mainframe, a messaging system, a database system, or an application. Connection resources are used by applications and modules to access EIS software.)

The key elements of EIS connectivity are the following:

At runtime, the following sequence occurs when an application connects to an EIS:

  1. The application gets the connector resource (data source) associated with the EIS by making a call through the JNDI API.

    Using the JNDI name of the connector resource, the naming and directory service locates the resource. Each EIS resource specifies a connector connection pool.

  2. Using the connector resource, the application gets an EIS connection.

    Enterprise Server retrieves a physical connection from the connection pool that corresponds to the EIS resource. The pool defines connection attributes such as the EIS name, user name, and password.

  3. After the EIS connection is established, the application can read, modify, and add data to the EIS.

    The application accesses the EIS information by making calls to the JMS API.

  4. When the application is finished accessing the EIS, the application closes the connection and returns the connection to the connection pool.