To achieve targeted instrumentation for specific workflows in your LlamaIndex application, you can use the OpenInferenceTraceCallbackHandler to instrument only the parts you want. Instead of setting a global handler, attach handlers to specific workflows. This allows you to selectively send spans to Phoenix for only the desired workflows.
Here's a basic example of how you might set this up:
```
from openinference.instrumentation.llama_index._callback import OpenInferenceTraceCallbackHandler
handler = OpenInferenceTraceCallbackHandler()
workflow_1.attach_handler(handler)
LBKSWould you like more detail on this process?
Sources:
- [Slack Discussion](https://arize-ai.slack.com/archives/C04R3GXC8HK/p1714680586.088139)
