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The simple way to have
Java applications withCA-Datacom
Need a GUI interface to your CA-Datacom data?This is the easy way!
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Abstract
Theres no reason why developers of non-mainframe
applications shouldnt benefit from using data in
mainframe CA-Datacom. This session explains a
straight-forward and highly effective approach to
having Java applications that can access and
maintain data in mainframe CA-Datacom.
Users prefer GUI interfaces to mainframe green
screens, and using Java brings many benefits to
application development. This session introducesthese benefits to the non-Java audience, and
shows how these benefits can be further enhanced
by linking with CA-Datacom.
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Agenda
What is Java?
Accessing CA-Datacom from Java
Demo of doing this the easy way!
Why do it?
Summary
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What is Java?
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What is Java?
Programming language
Runtime system
Development tools
Java Virtual Machine
Interpreter
Executes byte codes
Standard class file format
Ported to many hardware platforms
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A brief history of Java
1990 - James Gosling & colleagues, Sun
Microsystems, develop Oak
1995 Java freely available from Sun 1998 Java 2 incorporates additional features
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Java Background
Massive marketing by Sun
Arrival of world wide web
Requirement for architecture-neutral language
Vast body of technical expertise
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Java Features
Simple language similar to C++
Object-oriented focus on data & interface
Distributed
Robust, Secure
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More Java Features
Architecture-neutral
Portable
Interpreted
High performance, Multi threaded
Dynamic
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Java Terms & Concepts
Objects everything is considered an object
Classes a particular type of object
Encapsulation combining data & code intoa single object
Inheritance the derivation of one class fromanother
Polymorphism ability to assume several
different forms or shapes; the ability of a singlevariable to invoke different methods,
depending upon what the variable contains
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Java Basics
Source code
Compiler
Byte Codes
Interpreter
App.java
Javac App.java
App.class
Windows
Java VM
Linux
Java VM
z/OS
Java VM
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My first Java program
Program container
public class Hello { }
Main methodpublic static void main (String[] args) { }
Statement
System.out.println(Hello World);
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Java Platform
Java Virtual Machine
Java API
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A few Java definitions
J2EE Java 2 Enterprise Edition
used to develop, deploy & manage multi-tier, server
centric applications J2ME Java 2 Micro Edition
Java platform for embedded devices (cellphones &
PDAs)
J2SE Java 2 Standard Edition
Javascript
Embedded as small program in web page to control
appearance & action of browser
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Accessing CA-Datacom fromJava
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JDBC
Java Database Connectivity
API
Provides data access for Java programminglanguage
Complex, multi-tiered architecture
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JDBC Flow Type II Connection
PC PlatformJava application
CA-Datacom Server JDBC Driver
CA CCI
CA CCI
CA-Datacom Server
CA-Datacom
Mainframe Platform
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JDBC Flow Type IV Connection
Mainframe Platform
CA CCI
CA-Datacom Server
CA-Datacom
PC Platform
Java application
CA-Datacom JDBC
Proxy
PC Platform
CA-Datacom Java Server
(NT service, Linux)
CA-Datacom Server
JDBC Driver
CA CCI
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JDBC Flow z/OS Unix
Mainframe Platform
CA CCI
CA-Datacom Server
CA-Datacom
Java application
CA-Datacom Server JDBC Driver
CA CCI
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HTTP/XML Flow
PC PlatformJava application
Mainframe Platform
CICS & FireXML for CA-Datacom
CA-Datacom
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Demo of accessingCA-Datacom from Java
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Using the HTTP/XML approach
Simple architecture
Minimal installation
Nominal ongoing administration Standard Java programming techniques
Direct access to data in CA-Datacom Robust
High performance
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CA-Datacom
Demo architecture
Sysadm
.Cust
Sysadm
.Orders
Sysadm
.Items
Sysadm
.Detail
Order-entry (dbid 010)
CICS
FireXML
internet
Windows XP
Java VM
QED mainframe
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FireXML processing
DBMS
zOS,
OS390, VSE
mainframe
CICS
FireXMLBroker
browser,
web serverapplication(Java, Perl, C#,
C++, VB, ASP)
MR SMI TH
1 HI GH STREETANYTOWN
4. HTTP/XML
output document
SELECT NAME, ADDRESSFROM CUSTOMER WHERECUST_I D = 1234
2. SQL statement validated
and passed to DBMS
MR SMI TH , 1 HI GH STREETANYTOWN
3. DBMS returns
result set
SELECT NAME, ADDRESSFROM CUSTOMER WHERECUST_I D = 1234
1.. HTTP/SQL
input statement
existing 3270 applications
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Java coding 1
Import packages
import java.net.*;
import java.util.*;
import org.xml.sax.InputSource;
import org.w3c.dom.*;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.dom.DOMSource;
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Java coding 2
Declare variables
private String URL = "qed_mf1:3000"; /* Default FireXML mainframe */private String initSQL = "Select distinct STATE from sysadm.cust order
by STATE;";
J di 3
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Java coding 3
Code connection URL
HttpURLConnection urlConn = (HttpURLConnection)
url.openConnection();urlConn.setDoOutput(true);
urlConn.setDoInput(true);
urlConn.setRequestMethod("POST");
urlConn.setRequestProperty("Content-length",Integer.toString(requestBody.length()));
OutputStream os = urlConn.getOutputStream();
OutputStreamWriter out= new OutputStreamWriter(os);
out.write(requestBody);
out.flush();out.close();
J di 4
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Java coding 4
DOM processing
DOMParser parser = new DOMParser();
ByteArrayInputStream xmlIS = new ByteArrayInputStream(
XML.getBytes());
try {statusUpdate("XML received from mainframe - parse the XML");
parser.parse( new InputSource(xmlIS) );
document=parser.getDocument();
Th d
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The demo
JavaDatacom demo.lnk
http://../FireXML/Demos/SalesDemo/salesdemo.bathttp://../FireXML/Demos/SalesDemo/salesdemo.bat7/27/2019 5. Using Java to Access CA-Datacom
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What does this all mean?
O ti l i
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Operational issues
Installation & configuration
Concurrent usage
Security Performance
Maintenance & support
Integration benefits
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Integration benefits
Standard code with GUI interfaces
Use existing CA-Datacom data
Use of Java IDEs (eg. .Net, Sun ONE, Eclipse, Borland
Jbuilder, Websphere Development Studio)
Further info
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Further info
IBM Java support links
Java 2 on the z/OS platform
http://www-1.ibm.com/servers/eserver/zseries/software/java
Java on z/OS hints & tipshttp://www-
1.ibm.com/servers/eserver/zseries/software/java/javafaq.html Java Programming Guide for z/OS Redbookhttp://publib-
b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDoc
ument&Highlight=0,Java
More links
http://www-1.ibm.com/servers/eserver/zseries/software/javahttp://www-1.ibm.com/servers/eserver/zseries/software/java/javafaq.htmlhttp://www-1.ibm.com/servers/eserver/zseries/software/java/javafaq.htmlhttp://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDocument&Highlight=0,Javahttp://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDocument&Highlight=0,Javahttp://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDocument&Highlight=0,Javahttp://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDocument&Highlight=0,Javahttp://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDocument&Highlight=0,Javahttp://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDocument&Highlight=0,Javahttp://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDocument&Highlight=0,Javahttp://publib-b.boulder.ibm.com/Redbooks.nsf/9445fa5b416f6e32852569ae006bb65f/1f8767e73398d70085256760007b9ac1?OpenDocument&Highlight=0,Javahttp://www-1.ibm.com/servers/eserver/zseries/software/java/javafaq.htmlhttp://www-1.ibm.com/servers/eserver/zseries/software/java/javafaq.htmlhttp://www-1.ibm.com/servers/eserver/zseries/software/java7/27/2019 5. Using Java to Access CA-Datacom
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More links
Sun
http://java.sun.com
FireXML http://www.firexml.com
General http://www.java.net
Session Summary
http://java.sun.com/http://www.firexml.com/http://www.java.net/http://www.java.net/http://www.firexml.com/http://java.sun.com/7/27/2019 5. Using Java to Access CA-Datacom
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Session Summary
What is Java?
Accessing CA-Datacom from Java
Demonstration of HTTP/XML approach
Combining the benefits of Java with the
benefits of CA-Datacom Using standard HTTP and XML
The easy way!
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Tea
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