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Update an Oracle WebLogic Installation from 7.20 to 7.21

The following steps describe how to update the Camunda artifacts on an Oracle WebLogic application server in a shared process engine setting. Throughout the procedure, refer to the update guide. If not already done, download the Camunda 7.21 Oracle WebLogic distribution.

The update procedure takes the following steps:

  1. Uninstall the Camunda applications and archives.
  2. Replace Camunda core libraries.
  3. Replace optional Camunda dependencies.
  4. Maintain the Camunda 7 configuration.
  5. Install the Camunda Archive.
  6. Install the web applications.

In each of the following steps, the identifier $*_VERSION refers to the current versions and the new versions of the artifacts.

1. Uninstall the Camunda applications and archives

First, uninstall the Camunda web applications, namely the Camunda REST API (artifact name like camunda-engine-rest) and the Camunda applications Cockpit, Tasklist, and Admin (artifact name like camunda-webapp).

Uninstall the Camunda EAR. Its name should be camunda-oracle-weblogic-ear-$PLATFORM_VERSION.ear.

2. Replace Camunda core libraries

After shutting down the server, replace the following libraries in $WLS_DOMAIN_HOME/lib with the equivalents from $WLS_DISTRIBUTION/modules/lib:

  • camunda-engine-$PLATFORM_VERSION.jar
  • camunda-bpmn-model-$PLATFORM_VERSION.jar
  • camunda-cmmn-model-$PLATFORM_VERSION.jar
  • camunda-dmn-model-$PLATFORM_VERSION.jar
  • camunda-xml-model-$PLATFORM_VERSION.jar
  • camunda-engine-dmn-$PLATFORM_VERSION.jar
  • camunda-engine-feel-api-$PLATFORM_VERSION.jar
  • camunda-engine-feel-juel-$PLATFORM_VERSION.jar
  • camunda-engine-feel-scala-$PLATFORM_VERSION.jar
  • camunda-juel-$PLATFORM_VERSION.jar
  • camunda-commons-logging-$COMMONS_VERSION.jar
  • camunda-commons-typed-values-$PLATFORM_VERSION.jar
  • camunda-commons-utils-$COMMONS_VERSION.jar
  • camunda-connect-connectors-all-$CONNECT_VERSION.jar
  • camunda-connect-core-$CONNECT_VERSION.jar
  • feel-engine-$FEEL_ENGINE_VERSION-scala-shaded.jar
  • mybatis-$MYBATIS_VERSION.jar
  • slf4j-api-$SLF4J_VERSION.jar
  • slf4j-jdk14-$SLF4J_VERSION.jar

3. Replace optional Camunda dependencies

In addition to the core libraries, there may be optional artifacts in $WLS_DOMAIN_HOME/lib for LDAP integration, Camunda Spin, and scripting. If you use any of these extensions, the following update steps apply:

LDAP integration

Copy the following library from $WLS_DISTRIBUTION/modules/lib to the folder $WLS_DOMAIN_HOME/lib, if present:

  • camunda-identity-ldap-$PLATFORM_VERSION.jar

Camunda Connect plugin

camunda-connect-http-client, camunda-connect-soap-http-client, and camunda-engine-plugin-connect are part of the .ear.

Camunda Spin

Copy the following library from $WLS_DISTRIBUTION/modules/lib to the folder $WLS_DOMAIN_HOME/lib, if present:

  • camunda-spin-core-$SPIN_VERSION.jar

camunda-spin-dataformat-json-jackson, camunda-spin-dataformat-xml-dom, and camunda-engine-plugin-spin are part of the .ear.

GraalVM JavaScript

Copy the following libraries from $WLS_DISTRIBUTION/modules/lib to the folder $WLS_DOMAIN_HOME/lib, if present:

  • graal-sdk-$GRAALJS_VERSION.jar
  • icu4j-$ICU4J_VERSION.jar
  • js-$GRAALJS_VERSION.jar
  • js-scriptengine-$GRAALJS_VERSION.jar
  • regex-$GRAALJS_VERSION.jar
  • truffle-api-$GRAALJS_VERSION.jar

Groovy

The following libraries replace the single groovy-all-$GROOVY_VERSION.jar library. Copy these libraries from $WLS_DISTRIBUTION/modules/lib to the folder $WLS_DOMAIN_HOME/lib, if present:

  • groovy-$GROOVY_VERSION.jar
  • groovy-jsr223-$GROOVY_VERSION.jar
  • groovy-json-$GROOVY_VERSION.jar
  • groovy-xml-$GROOVY_VERSION.jar
  • groovy-templates-$GROOVY_VERSION.jar

4. Maintain the Camunda 7 configuration

If you have previously replaced the default Camunda 7 configuration by a custom configuration following any of the ways outlined in the deployment descriptor reference, it may be necessary to restore this configuration. This can be done by repeating the configuration replacement steps for the updated platform.

5. Install the Camunda Archive

Install the Camunda EAR, or the file $WLS_DISTRIBUTION/modules/camunda-oracle-weblogic-ear-$PLATFORM_VERSION.ear.

6. Install the web applications

REST API

Deploy the web application $WLS_DISTRIBUTION/webapps/camunda-engine-rest-$PLATFORM_VERSION-wls.war to your Oracle WebLogic instance.

Cockpit, Tasklist, and Admin

Deploy the web application $WLS_DISTRIBUTION/webapps/camunda-webapp-ee-wls-$PLATFORM_VERSION.war to your Oracle WebLogic instance.

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