Choosing the resource binding type

Camunda 8 offers version binding for linked processes, decisions, or forms. This allows you to deploy new versions without disrupting live processes, and prevents production outages.

You can choose the binding type for the linked target resource for the following BPMN process elements:

• Call activities
• Business rule tasks (if the DMN decision implementation is used)
• User tasks (if a Camunda Form is linked)

The binding type determines the version of the target resource used at runtime.

For example, for a call activity this would be the version of the called process to be instantiated.

Supported binding types

Camunda 8 supports the following binding types:

Type	Description
latest	Resolves to the latest deployed version of the target resource at the moment the process element is activated. You can use this option to easily change the target resource at runtime by deploying a new version of the resource. This allows for fast, iterative development, and easy hot fixes in production: Process instances that have not yet reached the process element use the newly deployed version of the target resource once the element is activated. If the process element has already been reached, you can use process instance modification to reactivate and relink it to the newly deployed target resource version. Be aware that using latest can lead to unexpected behavior if you deploy a new version of the target resource without ensuring backwards compatibility with every deployed process that depends on it. This might not be suited for production environments that require stability and a predictable behavior.
deployment	Resolves to the specific version of the target resource that was deployed together with the currently running version of the process in the same deployment. This option ensures predictable behavior by tying the two versions together, and allows you to deploy future versions of the target resource without disrupting ongoing process instances. It is ideal for self-contained projects without external or shared dependencies. To use the deployment binding option, create and deploy a process application in Web Modeler, or deploy multiple resources together via the Zeebe API.
versionTag	Resolves to the specific version of the target resource that is annotated with the given version tag. The version tag is a user-provided string (for example 1.2.0.Final) that makes it easy to identify a certain version of a resource and track it across multiple deployment stages (e.g. dev, test, prod). You can set the version tag for a BPMN process, DMN decision, or Form in the Modeler's properties panel. Using the versionTag binding option ensures that the right version of the target resource is always used, regardless of future deployments, by pinning the dependency to a specific version. The option is ideal for managing external or shared dependencies. Caution: If the target resource ID and version tag pair are not deployed, the process instance will have an incident. To avoid this situation, ensure the version tag defined in the call activity, business rule task, or user task matches the version tag in the dependent resource. Be aware that you can deploy a new version of a resource with an already existing version tag. In this case, the version tag reference will be updated and point to the latest deployed version.

note

If the binding type is not explicitly specified in your BPMN diagram, latest is used as the default.