Executing decision services with execution Java API

You can execute decisions in a Java™™ application that is running in a Kubernetes container by using the execution Java API for Decision Intelligence Client Managed Software.

The execution Java API does not use or depend on any installed services in Decision Intelligence. It does not use the decision runtime REST API or decision service storage. Instead, decision service archives are directly used in the execution API. These decision service archives can be packaged in your Java application or accessed with a URL.

For more information, see the Execution Java API reference in Reference.

Important: Before you start using the execution Java API, you must configure to monitor and track usage based on the license and entitlements that you use.
License and entitlements to use IBM Decision Intelligence Client Managed Software Description
IBM Decision Intelligence Client Managed Software

You must use IBM® License Metric Tool (ILMT) to monitor the number of execution. For more information, see Monitoring executions with IBM License Metric Tool.
IBM Cloud Pak® for Business Automation

You must use IBM License Service (ILS) and enable metering to track usage. For more information, see Metering and tracking usage for execution Java API.

Environment

The execution API must be used in an environment in Java 25. The Java libraries that are used by the external libraries for your decision services must be compatible with the Java version (Java 25) for the execution.

Restriction: The execution Java API is compatible with decision service archives that are generated in Automation Decision Services V22.0.2 or later.

Samples

Samples that use the execution Java API are available in GitHub. Click Decision Intelligence Client Managed Software samples External link opens a new window or tab to be redirected to the GitHub repository.
  • Sample: Executing a decision service in Java (available in the ExecutionApiSample subfolder) – You can execute decision services by using the execution Java API, and display execution traces.
  • Sample: Creating a web microservice for executing a decision service (available in the WebMicroServiceSample subfolder) – You can create a web microservice to execute a decision service. You can use a decision service with or without a predictive model.