COBOL and Distributed Architecture

Boris GiladCOBOL Solutions Manager

Boris.gilad@ness.com

borisg@cobol.co.il

Agenda

Object Oriented COBOL

COBOL - Java interaction

COBOL and XML

COBOL and Web Services

COBOL and EJB

COBOL.Net

Q & A

COBOL and others - then and now

From COBOL To COBOL

Past Call Using Linkage Section

Call “System” Invoking from command line

Present COBOL-RPC

COBOL-CGI

CORBA

OO COBOL COBOL RTS as OO Class

Future COBOL XML COBOL XML

Consuming WS from COBOL Exposing COBOL as WS

Exposing COBOL as EJB

.Net .Net

Object Oriented COBOL concepts

Objects and Classes

Object References Predefined Object References

Methods Method Invocation

Interfaces

Polymorphism Class Inheritance

ETC, ETC, ETC

Object Oriented COBOL demo program

Calling Java from COBOL

Access JDBC Data Sources from COBOL

Send messages to Java Objects from COBOL using the Java Domain

Calling Procedural COBOL from Java

Access existing COBOL assets from Java using mfcobol.runtime class

Calling Object COBOL from Java

Access COBOL objects from Java Programs

Wizard generates Java wrapper class

Micro Focus COBOL/XML Syntax

Provide a higher level COBOL orientated approach to COBOL/XML

Adds significant new syntax to handle XML documents to consume, create, update and XML documents from COBOL• Based on familiar approach used with COBOL I/O support• Provides both SAX style or DOM style parsing

Map to/from XML W3C Compliant Schemas

COBOLRecord

CBL2XMLXML

Schema

Micro Focus Syntax - SELECT

SELECT statement is the foundation

Just like COBOL File I/O

SELECT xml-bookdb ASSIGN "c:bookrw.xml“

ORGANIZATION IS xml

DOCUMENT-TYPE IS "bookdb.xsd"

FILE STATUS IS xml-bookdb-status.

Micro Focus Syntax - XD

XD stucture - the association between XML and COBOL records

xd xml-bookdb.01 xml-bookdb-query identified by "query“. 03 xml-book occurs 3 identified by “book”. 05 xml-bq-author pic x(40) identified by "author".

05 xml-bq-title pic x(40) identified by "title".

represents an XML document that has structure:

<query> <book>

<author>Author Name</author> <title>Book Title</title> </book> <book>

<author>Author Name</author> <title>Book Title</title> </book></query>

Micro Focus Syntax – Basic Verbs

OPEN {input|output|i-o} file-name• surprise, surprise, surprise

READ file-name• Read entire XML document

WRITE file-record• Write entire XML document

CLOSE file-name• more surprises…

COBOL XML Demo

What is Service?

What Service do I provide?

What Input do I receive?

What Output do I return?

Where to find me?

COBOL Program as Service

linkage section.

01 lnk-function pic x.

88 read-record value "1".

88 add-record value "2".

88 delete-record value "3".

88 next-record value "4".

01 lnk-file-status pic xx.

01 lnk-details.

03 lnk-text-details.

05 lnk-title pic x(50).

05 lnk-type pic x(20).

05 lnk-author pic x(50).

03 lnk-stockno pic x(4).

03 lnk-retail pic 99v99.

03 lnk-onhand pic 9(5).

03 lnk-sold pic 9(5) comp-3.

COBOL Program as Service

Service Read_Record lnk-function = 1 Service Add-Record lnk-function = 2

Input lnk-stockno Input lnk-stockno

Output lnk-file-status lnk-text-details

lnk-text-details Output lnk-file-status

lnk-retail

lnk-onhand

lnk-sold

Service DeleteRecord lnk-function = 3 Service Add-Record lnk-function = 2

Input lnk-stockno Output lnk-file-status

Output lnk-file-status lnk-stockno

lnk-text-details

lnk-retail

lnk-onhand

lnk-sold

Interface Mapping Toolkit (IMTK)

COM

Web Services

JavaApplication

Server

EnterpriseServer

EJBInterface

TestClient

Non-ESWindows only

Generation Deployment

COBOLInterface

(Linkage Section)

Direct COBOL Web Services

The ability to Create, Consume and Deploy COBOL Web services without requiring any 3rd Party Software

Create• New tool in Net Express 4.0 called the Interface Mapping Toolkit

builds a Web service from an existing COBOL Interface

Consume• COBOL can access a Web service built not only with Net

Express but say .NET or IBM WebSphere

Deploy• Direct COBOL Web services can be deployed with Enterprise

Server

Complete COBOL Web services Solution

‘Direct’ COBOL Web services

Net Express/Server Express Enterprise Server

SOAPListener

Workload

Disp

atcher

No Java footprint on the server

ServerPool

Users COBOLprograms

Decode

Generated by Interface Mapping

Toolkit

SOAP/HTTPInsuranceBroker

application

InsuranceBroker

application

COBOLProgram

Checker

InterfaceMapper

IDTIDT Map. XMLMap. XML

INTINT Data Dict. Data Dict. XMLXML

EJB EJB ClassesClasses

EJB, JSP and Servlet Generator

ServletServletClassesClasses

JSPJSP

Mapping COBOL Programs as EJB

Enterprise Server defines a COBOL Container for UOW transaction execution• Follows the ‘Container Managed Transaction’ model

• No explicit syntax required

• Transaction characteristics defined when deployed

Web services transactions are single-phase stateless transactions

Supports Micro Focus ISAM and ‘leading’ RDBMS

Acts as a resource manager to J2EE XA transaction protocols

Enterprise Server –Transaction Processing

COBOL Inside the .NET Framework

Net E

xpress 5.0

Visu

al Stu

dio 2005

COBOL C# VB.NET …

MSIL (Intermediate Language)

.NET Framework 2.0

FrameworkClasses ADO.NET Winforms Webforms

Win32

COBOL Development COBOL Deployment

Com

mon

Lan

guage R

un

time

Micro F

ocus

Ap

plication

Server

COBOL – an equal player in .NETCOBOL – an equal player in .NETCOBOL generates IL as other Microsoft languagesCOBOL generates IL as other Microsoft languagesCOBOL is deployed inside the .NET Framework under the CLRCOBOL is deployed inside the .NET Framework under the CLRCOBOL gains access to Framework classes and functionalityCOBOL gains access to Framework classes and functionality

Visual Studio 2005 Integration

•Productive COBOL Development and extension with Visual Studio

•Develop composite .NET COBOL/C#/VB.NET applications using same IDE

•Access .NET Framework from COBOL

COBOL compiles to managed or verifiable code

Solution contains multiple projects, one for each programming language involved. This solution involves COBOL and C#

Colorization in COBOL editor distinguishes reserved words, data names, comments, etc.

Intellisense lists method-name choices

.NET WinForms and WebForms in COBOL

Use Visual Studio Painter to create and maintain windows forms and web pages to interact with existing COBOL programs

Win Form painter with Properties dialog box

COBOL code is created to support the Win Form.

Solution Explorer shows entire web site

Web Form screen designer

Toolbox for adding controls to Web form

COBOL code behind the Web form

Web Form with data during execution

Win Form with data during program execution.

Create, Reuse and Extend

Reuse existing COBOL Business logic in .NET

Use Procedural or Object Oriented COBOL under .NET

Extend COBOL applications to utilize .NET functionality- Access to .NET Framework Classes

program-id. ShowMessageBox as "ShowMessageBox". environment division. configuration section. repository. class Message-Box as "System.Windows.Forms.MessageBox".

data division. working-storage section. procedure division. invoke Message-Box "Show" using "Hello COBOL World". end program ShowMessageBox.

Connected and Disconnected Data Access

ADO.NET provides for Connected and Disconnected data accessDisconnected data access liberates SQL application from a continual connection to a databaseEnhance the performance of web and other applicationsShare data across composite applications Make ISAM and other data available to non-COBOL applicationsExport data to XML

ApplicationRead / Write RDB ISAM

Connected Data Access

Application

RDB ISAM

Disconnected Data Access

COBOL, C#, VS.NET Program

COBOL, C#, VB.NET Program

Dataset(s)

Download

Upload

Expose COBOL as Web Services

Use Visual Studio .NET to create and extend COBOL applications

CLASS-ID. Stock INHERITS WEBSERVICE. REPOSITORY. CLASS WEBSERVICE AS "System.Web.Services.WebService" CLASS WEBMETHOD AS "System.Web.Services.WebMethodAttribute". OBJECT. PROCEDURE DIVISION. METHOD-ID. StockQuote CUSTOM-ATTRIBUTE IS WEBMETHOD.

Microsoft IIS

AS

P.N

ET

CO

BO

L

COBOLApplication

COBOL.Net demo program

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Summary

Q&A

Thank YouThank You

VIVA COBOL !