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CHAR Link to Program Sample

This sample shows how you can use the JCICSX API to LINK to a CICS Program, passing through a CHAR container, and returning CHAR data as the output of the Program.

This web application takes the string "Hello from Java" and links to the EDUCHAN program with the channel MYCHANNEL and an input container called INPUTDATA. The EDUCHAN program reads the data from the input container and reverses the string. The output string is placed in the output container OUTPUTDATA, read in by the servlet and displayed on the web page.

Pre-reqs

  • CICS TS V5.6 or later
  • Java SE 1.8 or later on the z/OS system
  • Java SE 1.8 or later on the workstation

Setup

This application links to the COBOL program EDUCHAN, which can be found in src/main/cobol.
Download and compile the supplied COBOL program EDUCHAN and deploy into CICS.

This sample is a Maven project, which uses the CICS Bundle Maven plugin to package the web application in a CICS bundle and deploy this to CICS. This requires the CICS bundle deployment API to be enabled in CICS as a prerequisite. Alternatively, if you aren't using Maven, you can use Gradle or you could take the source from this project and use one of the other methods of deploying the application to CICS such as creating a CICS bundle project in CICS Explorer and adding the source as a dynamic web project include.

To run the sample as-is, fill out values in the configuration block in pom.xml

<configuration>
  <defaultjvmserver>DFHWLP</defaultjvmserver>
  <url>http://yourcicsurl.com:9080</url>
  <username>${cics-user-id}</username>
  <password>${cics-password}</password>
  <bunddef>DEMOBUNDLE</bunddef>
  <csdgroup>BAR</csdgroup>
  <cicsplex>CICSEX56</cicsplex>
  <region>IYCWEMW2</region>
</configuration>

Running mvn clean install will package the web application into a CICS Bundle and install and enable it. You can then view the web server http://yourcicsurl.com:9080/char-link-program-sample-0.0.1-SNAPSHOT/ You should see the message Hello world! Returned from link to 'EDUCHAN' with a text response of ' avaJ morf olleH'