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General Access VSAM data from remote Access to DL/I from remote Java access to VSE resources Multiplatform Development and VSE Access remote data via VSAM Redirector Access to CICS via Browser Call CICS applications from remote Web Services with VSE

Access DL/I data from remote systems

Core applications and processes based on DL/I databases with the requirement of integration of these applications in heterogeneous processes can now take advantage of modern functions implemented in VSE.

	Overview
	Benefits
	Software requirements
	How to get started
	Additional information

Overview

To have real time access to DL/I data from a remote platform, the VSE Java-based Connector, part of the VSE e-business Connectors was developed to solve this business need. It is build of  2 components:

• The VSE Connector Server: A batch program running on VSE in a static or dynamic partition. A plug-in for this Connector Server is designed to work with DL/I.
• The VSE Connector client: A Java component running on every Java enabled platform i.e. Linux, UNIX, Windows. This component is delivered with the VSE operating system or can be downloaded for free from internet.

Access to the DL/I is done through the DL/I online nucleus via MPS. The VSE connector client contains interfaces to interact via PSB and corresponding PCB with the DL/I subsystem and data.

Real time Access to DL/I data:

• from standalone applications
• from web applications (e.g. using WebSphere)
• from Servlets, JSPs, EJBs, Applets

On the remote side the VSE Connector Client provides a program interface which can be exploited by any kind of program or web application. All kinds of DL/I requests can be performed, including CHECKPOINT and ROLLBACK.

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Benefits

Real time access to DL/I data from a remote system allows the integration of DL/I data into distributed processes and web transactions.

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Software requirements

The following software requirements must be meet in order to implement this solution:

• VSE/ESA 2.5 or later
• TCP/IP for VSE/ESA
• VSE Connector Server running on VSE
• DL/I 1.11or later
• APAR PQ39683 for DL/I must be applied
• Your CICS/DLI system should have all PSBs defined in the DL/I online nucleus DLZNUCxx and it should have an active MPS system.
• Linux, Windows, AIX, Unix on remote system
• Java runtime (JRE) or Java developer kit (JDK) 1.3 or later
• VSE Connector Client installed on remote system

Note: WebSphere is NOT required to run the VSE Java-based connector. However, the connector can be deployed into WebSphere as an Resource Adapter if you wish to access VSAM from a web application.

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How to get started

To get started, following Steps need to be done:

• Start VSE connector server on VSE (release STARTVCS from the reader queue or create it from ICCF library 59, skeleton SKVCSSTJ).
• Make sure a Java runtime (JRE) or Java developer kit (JDK) 1.3 or later is installed on you distributed platform.
• Download and install the VSE Connector Client to your PC or workstation.
• Develop a program that uses the PSBs and PCBs to access the data you'd like to have access to.

Note: The VSE connector client contains descriptions and samples for accessing DL/I data.

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Additional information

Additional information for this solution scenario can be found:

• VSE e-business connectors User's Guide
• VSE Connector Client
• DL/I documentation
   

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