Which service integration mode is not supported by Serverless Workflow?

Serverless Workflow offers a way to define and execute workflows that can integrate various cloud services without needing to manage the underlying infrastructure. When considering the service integration modes supported by Serverless Workflow, it is important to recognize what each mode represents.

Synchronous mode involves a request-response mechanism where the workflow waits for a response before proceeding. This is useful for scenarios where immediate feedback is essential.

Event-driven mode is characterized by workflows that can respond to events and triggers asynchronously. This model is prevalent in serverless architectures and aligns well with the event-driven cloud services provided by Alibaba Cloud.

Workflow-driven mode relates to executing a sequence of steps in a defined order, driven by the logic of the workflow itself. This integration mode allows complex workflows to be managed and executed effectively, promoting better organization of processes.

Asynchronous mode, contrary to what was indicated as the correct answer, is indeed a valid integration method supported by Serverless Workflow. It allows the workflow to proceed without waiting for each task to complete synchronously, enabling a more efficient execution of concurrent tasks.

Given this context, the service integration mode that is not supported by Serverless Workflow is the workflow-driven mode, as it does not align with the types of integrations typically facilitated by the service's functions.