Oracleas Adapter For Ims/Db Architecture; Integration Flow From Oracle Application Server To The Legacy Application - Oracle Application Server 10.1.3.4 User Manual

OracleAS Adapter for IMS/DB Architecture

OracleAS Adapter for IMS/DB Architecture
OracleAS Adapter for IMS/DB includes the following components:
J2CA 1.5 IMS/DB adapter: The J2CA IMS/DB adapter is a standard resource
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adapter that is compliant with J2EE Connector Architecture, therefore, providing
J2EE components connectivity.
Oracle Connect: Oracle Connect runs on the legacy system and handles requests
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from the J2CA 1.5 IMS/DB adapter, that runs within Oracle Application Server
Containers for J2EE (OC4J).
Oracle Studio: Oracle Studio is the configuration tool for Oracle Connect.
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Configuration tasks using Oracle Studio are performed on a Windows or Linux
compuer. Oracle Studio uses perspectives that enables you to generate specific
information necessary to model OracleAS Adapter for IMS/DB.
The following figure illustrates the components of OracleAS Adapter for IMS/DB.

Integration Flow from Oracle Application Server to the Legacy Application

The J2CA 1.5 IMS/DB adapter converts the J2CA interaction invocation received from
Oracle Application Server to the XML format and passes the XML format to Oracle
Connect on the legacy server. The daemon listens for the request coming from the
J2CA 1.5 IMS/DB adapter client and assigns a server process to handle the request.
The properties of the server process, such as connection pooling requirements, are
defined by a workspace definition within the daemon.
The server process includes an instance of the application engine, which converts the
XML format into standard SQL which is passed to the data engine. The data engine
processes the SQL to create an efficient strategy for retrieving the data from IMS/DB
and then passes the SQL and execution strategy to the database back-end adapter. The
database back-end adapter passes the SQL to the back-end driver, which converts the
SQL to the language understood by IMS/DB and passes it to IMS/DB to be executed.
The results of the SQL statement are passed back to the application engine, through
the back-end adapter, where these results are converted to XML and passed back to the
client.
1-2 Oracle Application Server Adapters for IMS/DB User's Guide
Oracle Application Server Adapter Concepts Guide
See Also: