Update an Oracle WebLogic Installation from 7.2 to 7.3

The following steps describe how to update the ASEE Flow artifacts on an Oracle WebLogic application server in a shared process engine setting. For the entire migration procedure, refer to the migration guide. If not already done, make sure to download the ASEE Flow 7.3 Oracle WebLogic distribution. The update procedure takes the following steps:

1. Uninstall the ASEE Flow libraries and archives
2. Replace ASEE Flow core libraries
3. Replace optional ASEE Flow dependencies
4. Maintain ASEE Flow configuration (optional)
5. Install the ASEE Flow archive
6. Install the ASEE Flow web applications

In each of the following steps, the identifiers $*_VERSION refer to the current version and the new versions of the artifacts.

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1. Uninstall the ASEE Flow Applications and Archives

First, uninstall the ASEE Flow web applications, namely the ASEE Flow REST API (artifact name like camunda-engine-rest) and the ASEE Flow 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.

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2. Replace ASEE Flow Core Libraries

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

• camunda-engine-$PLATFORM_VERSION.jar
• camunda-bpmn-model-$PLATFORM_VERSION.jar
• camunda-cmmn-model-$PLATFORM_VERSION.jar
• camunda-xml-model-$PLATFORM_VERSION.jar

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3. Replace Optional ASEE Flow Dependencies

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

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LDAP integration

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

• camunda-identity-ldap-$PLATFORM_VERSION.jar

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ASEE Flow Connect

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

• camunda-connect-core-$CONNECT_VERSION.jar

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ASEE Flow Spin

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

• camunda-spin-core-$SPIN_VERSION.jar

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4. Maintain the ASEE Flow Configuration

If you have previously replaced the default ASEE Flow 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.

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Task Query Expressions

As of 7.3.3, the default handling of expressions submitted as parameters of task queries has changed. Passing EL expressions in a task query enables execution of arbitrary code when the query is evaluated. The process engine no longer evaluates these expressions by default and throws an exception instead. This behavior can be toggled in the process engine configuration using the properties enableExpressionsInAdhocQueries (default false) and enableExpressionsInStoredQueries (default true). To restore the engine’s previous behavior, set both flags to true. See the user guide on security considerations for custom code for details. This is already the default for ASEE Flow versions after and including 7.2.8.

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5. Install the ASEE Flow Archive

Install the ASEE Flow EAR, i.e., the file $WLS_DISTRIBUTION/modules/camunda-oracle-weblogic-ear-$PLATFORM_VERSION.ear.

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6. Install the Web Applications

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REST API

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

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Cockpit, Tasklist, and Admin

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