CICS bundle Gradle plugin (com.ibm.cics.bundle)

• About this project
• The CICS bundle Gradle plugin
  • Supported bundle part types
  • Prerequisites
  • Gradle tasks
  • Configure the plugin
  • Build and package a CICS bundle
  • Deploy a CICS bundle
  • Advanced configuration
  • Samples
  • Troubleshooting
• Contributing
• Support
• License

This is a Gradle plugin that can be used to build CICS bundles, ready to be installed into CICS TS.

This project contains:

• The CICS bundle Gradle plugin (com.ibm.cics.bundle), a Gradle plugin that can build CICS bundles, include selected bundle parts, and deploy them to CICS. It's available from both the Gradle Plugin Portal and Maven Central.
• samples, a collection of samples that show different ways of using this plugin.

Supported bundle part types

The CICS bundle Gradle plugin supports building CICS bundles that contain the following bundle parts:

Java-based bundle parts

• OSGi Bundle (JAR)
• Web Archive (WAR)
• Enterprise Archive (EAR)
• Enterprise Bundle Archive (EBA)
  Note: Enterprise Bundle Archive (EBA) support is stabilized in CICS TS.

Non-Java-based bundle parts

• EPADAPTER
• EPADAPTERSET
• EVENTBINDING
• FILE
• LIBRARY
• PACKAGESET
• POLICY
• PROGRAM
• TCPIPSERVICE
• TRANSACTION
• URIMAP

It can deploy CICS bundles containing any bundle parts.

Prerequisites

The plugin requires Gradle version 5 features and will not work correctly on earlier releases of Gradle.

The plugin builds CICS bundles for any in-service version of CICS Transaction Server for z/OS (version 5.3 and later at the time of writing).

However, if you're using the deployCICSBundle task of the plugin to deploy bundles to CICS, you must enable the CICS bundle deployment API. The CICS bundle deployment API is supported by the CMCI JVM server that must be set up in a WUI region or a single CICS region. See the CICS TS doc for details. To use the deployCICSBundle task, make sure that:

• For a CICSPlex SM environment, set up the CMCI JVM server in the WUI region of the CICSplex that contains the deployment target region. The WUI region must be at CICS TS 5.6 or later.
• For a single CICS region environment (SMSS), set up the CMCI JVM server in the deployment target region. The region must be at CICS TS open beta or later.

Gradle tasks

The CICS bundle Gradle plugin contributes the following gradle tasks in sequential order.

Tasks	Description
buildCICSBundle	Builds a CICS bundle. Java-based bundle parts are added using the cicsBundlePart dependency configuration. Non-Java-based bundle parts are automatically added from the src/main/resources folder of your project.
packageCICSBundle	Packages the built CICS bundle into a zipped archive.
deployCICSBundle	Deploys the packaged CICS bundle to CICS on z/OS, installs and enables it.
build	Performs a full build of the project, including assembling all artifacts and running all tests. You only need to call the build task when building or packaging your CICS bundles as it depends on those tasks.

Their dependencies are as follows:

:build
\--- :assemble
     \--- :packageCICSBundle
          \--- :buildCICSBundle

:deployCICSBundle
\--- :packageCICSBundle
     \--- :buildCICSBundle

Configure the CICS bundle Gradle plugin

To use the plugin, you may either:

• Add the CICS bundle configuration into an existing Gradle Java project, such as a WAR project. This will give you a single standalone project containing both the Java application and the CICS bundle configuration. The Standalone project sample (gradle-war-sample) shows this case.
• Create a separate Gradle module to contain the CICS bundle configuration. This will give you a multi-part project where the CICS bundle configuration is kept separate from the Java application. The Multi-part project sample (gradle-multipart-sample) shows this case.

In either case, configure the Gradle module as follows:

1. Add the plugin id to your build.gradle.

   plugins {
       id 'com.ibm.cics.bundle' version '1.0.3'
   }

2. If using a snapshot version of the plugin, add the snapshot repository to your settings.gradle, so Gradle can find the plugin.

   pluginManagement {
       repositories {
           maven {
               name = "SonatypeSnapshots"
               url = uri("https://oss.sonatype.org/content/repositories/snapshots")
           }
           gradlePluginPortal() // Needed for the plugin's own dependencies.
       }
   }

Build and package a CICS bundle

1. In your build.gradle, define the version for the bundle.

   version '1.0.0'

2. Add Java-based bundle parts to the bundle by adding them to the dependencies block using the cicsBundlePart configuration.
   • If using the standalone project option: To include the bundle part produced by the project, use the files notation, and specify the name of the task which produces the bundle part archive, e.g. jar, war, or ear.

     dependencies {
         cicsBundlePart files(war)
     }

   • If using the multi-part project option: To include a bundle part produced by a separate Gradle module, use the project notation with the archives configuration, and specify the path to the module.

     dependencies {
         cicsBundlePart project(path: ':path-to-other-module', configuration: 'archives')
     }

   • To include a bundle part hosted in a remote repository such as Maven Central, use the default module notation, using any of the permitted formats.

     dependencies {
         // Map notation
         cicsBundlePart group: 'org.codehaus.cargo', name: 'simple-war', version: '1.7.7', ext: 'war'
         // String notation
         cicsBundlePart 'org.codehaus.cargo:simple-war:1.7.7@war'
     }

     Then specify the repository to use to retrieve the remote bundle part.

     repositories {
         mavenCentral()
     }

3. Add the cicsBundle extension block to your build.gradle. This is where you will supply additional configuration properties for the plugin. There are separate sub-blocks for build and deploy properties.

   cicsBundle {
       build {
           ...
       }
       deploy {
           ...
       }
   }

4. If you have included any Java-based bundle parts, update the cicsBundle extension to define the default JVM server that they will use.

   cicsBundle {
       build {
           defaultJVMServer = 'DFHWLP'
       }
   }

5. To include non-Java-based bundle parts, put the bundle part files in the src/main/bundleParts directory. Files in this directory will be automatically included in the CICS bundle, and supported types will have a element added to the CICS bundle's cics.xml. The location of this directory can be configured in the cicsBundle extension. The configured directory is relative to src/main/.

   cicsBundle {
       build {
           bundlePartsDirectory = 'myBundleParts'
       }
   }

6. Invoke the build task in your build. It builds the CICS bundle with its contained bundle parts, and packages it as a zip file.

   ./gradlew build
   

Deploy a CICS bundle

Deploying your bundle to CICS requires extra configuration in CICS, as described in Pre-requisites.

Also ensure a BUNDLE definition for this CICS bundle has already been created in the CSD. You can ask your system admin to do this and pass you the CSD group and name of the definition. The bundle directory of the BUNDLE definition should be set as follows to match your CICS bundle: <bundle_deploy_root>/<bundle_id>_<bundle_version>.

1. In the CICS bundle module's build.gradle, add settings to the cicsBundle extension block for the deploy destination.

   cicsBundle {
       deploy {
           cicsplex = 'MYPLEX'
           region   = 'MYEGION'
           bunddef  = 'MYDEF'
           csdgroup = 'MYGROUP'
           url      = 'https://myserver.site.domain.com:1234'
           username = myUsername
           password = myPassword
       }
   }

   Edit the code snippet above to match your CICS configuration:
   • url - Set the transport, hostname, and port for your CMCI
   • username & password - These are your credentials for CICS. You can pass these into the build in a variety of ways (see Gradle User Guide), or use other plugins for further encryption, such as the gradle-credentials-plugin.
   • bunddef - The name of the BUNDLE definition to be installed.
   • csdgroup - The name of the CSD group that contains the BUNDLE definition.
   • cicsplex - The name of the CICSplex that the target region belongs to. Not required for single region (SMSS) environments.
   • region - The name of the region that the bundle should be installed to. Not required for single region (SMSS) environments.
2. Invoke the deployCICSBundle task in your build to deploy the bundle to the target CICSplex and region.

   ./gradlew deployCICSBundle
   

   If you run into an unable to find valid certification path to requested target error during deployment, see Troubleshooting for a fix.

Advanced configuration

When adding Java-based bundle parts to your CICS bundle, the following defaults will be used:

• The name of the bundle part will be equal to the file name.
• The jvmserver of the bundle part will be equal to the vaule of the defaultJVMServer property in the cicsBundle extension.
• The type of the bundle part will be determined by the file extension, e.g. a .jar extension will result in an OSGi bundle part.

For the majority of users, these defaults will be sufficient. However, for advanced users, any of the defaults can be overriden with specific values by wrapping your cicsBundlePart dependency declaration inside one of the following types:

• cicsBundleOsgi
• cicsBundleWar
• cicsBundleEar
• cicsBundleEba

You may use either the closure syntax or map syntax to specify the values:

dependencies {
    // Closure syntax
    cicsBundleWar {
        // Specify dependency as normal using any of the usual notations.
        dependency = cicsBundlePart 'org.codehaus.cargo:simple-war:1.7.7@war'
        // Changes the name from 'simple-war' to 'new-name'.
        name = 'new-name'
        // Changes the jvmserver from 'DFHWLP' to 'NEWJVMS'.
        jvmserver = 'NEWJVMS'
    }
    // Map syntax
    cicsBundleWar(dependency: cicsBundlePart('org.codehaus.cargo:simple-war:1.7.7@war'), name: 'new-name', jvmserver: 'NEWJVMS')
}
cicsBundle {
    build {
        defaultJVMServer = 'DFHWLP'
    }
}

Samples

Use of this plugin will vary depending on what you’re starting with and the structure of your project, for example, whether you'd like to create a separate Gradle module for the bundle configuration or you'd like to include it into your existing module. We have included some samples to demonstrate the different methods.
Multi-part project sample (gradle-multipart-sample)
This sample is the quickest way to try the plugin out if you don't already have a Gradle project. It shows how to configure a multi-part Gradle project to build and deploy a CICS bundle, with a separate module to contain bundle configurations. The sample has a parent Gradle project that contains a local and a remote JAVA project as child modules. It also contains a CICS child module that wraps the other two modules into a CICS bundle and deploys the built bundle to CICS. A README is included in the sample with detailed instructions.

Standalone project sample (gradle-war-sample)
If you already have a Gradle module and want to add extra configuration to it for quick use of the plugin, check out this sample. It shows you how to configure an existing WAR project to build a CICS bundle. You can either copy and paste the configuration to your WAR project or import the full sample to see how it works. A README is included in the sample with detailed instructions.

Troubleshooting

unable to find valid certification path to requested target during deployment

You may run into this error when deploying your CICS bundle.

sun.security.validator.ValidatorException: PKIX path building failed:
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Why does it happen?
It indicates an issue with establishing a trusted connection over TLS/SSL to the remote server (CICS bundle deployment API). It may happen when you are using a self-signed certificate or a certificate that's issued by an internal certificate authority, or that the certificate is not added to the trusted certificate list of your JVM.

How to resolve it?
You have two ways of resolving this issue:

1. Recommended Obtain the server certificate(s) and add it/them to the trusted certificate list of your JVM:
   For security consideration, you may still want the TLS/SSL checking to be enabled. In this case, follow the instructions in How do I import a certificate into the truststore to trust the server's certificate, supplying your server's information. More information about the commands involved is listed below:

   • openssl s_client
   • openssl x509
   • Certificate encoding & extensions

2. Disable TLS/SSL certificate checking:
   Add insecure = true to the deploy configuration of your bundle's build.gradle (See snippet in Step 1 of Deploy a CICS bundle).
   Note: Trusting all certificates can pose a security issue for your environment.

internal server error during deployment

You might see this error in the Gradle log when you deploy a CICS bundle:

com.ibm.cics.bundle.deploy.BundleDeployException: An internal server error occurred. Please contact your system administrator

Why does it happen?
It indicates errors on the CMCI JVM server side.
How to resolve it?
Contact your system administrator to check the messages.log file of the CMCI JVM server. For more information about how to resolve CMCI JVM server errors, see Troubleshooting CMCI JVM server in CICS documentation.

Error creating directory during deployment

You might see this message in the Gradle log when deploying a CICS bundle:

[ERROR]  - Error creating directory '<directory>'.

Why does it happen?
The error occurs because the user ID that deploys the bundle doesn't have access to the bundles directory.
How to resolve it?
Contact your system administrator to make sure the deploy_userid configured for the CICS bundle deployment API has WRITE access to the bundles directory. The bundles directory is specified on the com.ibm.cics.jvmserver.cmci.bundles.dir option in the JVM profile of the CMCI JVM server.
For instructions on how to specify the bundles directory and grant access to deploy_userid, see Configuring the CMCI JVM server for the CICS bundle deployment API in CICS documentation.

Contributing

We welcome contributions! Find out how in our contribution guide.

Support

The CICS bundle Gradle plugin is supported as part of the CICS Transaction Server for z/OS license. Problems can be raised as IBM Support cases, and requests for enhancement can use the Idea site, for product CICS Transaction Server for z/OS.

Equally, problems and enhancement requests can be raised here on GitHub, as new issues.

License

This project is licensed under the Eclipse Public License, Version 2.0.