Which trigger type is classified as a one-way trigger in Function Compute?

The classification of a trigger as one-way in the context of Alibaba Cloud Function Compute typically refers to how the trigger interacts with the function. A one-way trigger means that the trigger initiates the function execution, but there is no response channel between the function and the trigger itself.

CloudMonitor triggers are designed specifically to automate function invocations based on metrics and specified thresholds, such as CPU usage or other monitored resource metrics. Once the defined condition is met, the CloudMonitor trigger sends a request to execute the function, without expecting any feedback or additional interaction from the function back to CloudMonitor. This unidirectional nature is what classifies it as a one-way trigger.

In contrast, API Gateway triggers facilitate an interaction model where users make a request, and the function then processes it and returns a response. Similarly, bucket notification triggers and timer triggers also imply the function may provide a feedback loop or acknowledgment. Therefore, the characteristics of the CloudMonitor trigger distinctly align it with being a one-way trigger in this context, as it solely initiates function execution based on monitored conditions without further communication.