add print trace id

Author: yaozheng-fang

veadk/runner.py

@@ -175,8 +175,30 @@ async def run(
         if save_tracing_data:
             self.save_tracing_file(session_id)
 
+        self._print_trace_id()
+
         return final_output
 
+    def _print_trace_id(self):
+        if not isinstance(self.agent, Agent):
+            logger.warning(
+                ("The agent is not an instance of VeADK Agent, no trace id provided.")
+            )
+            return
+
+        if not self.agent.tracers:
+            logger.warning(
+                "No tracer is configured in the agent, no trace id provided."
+            )
+            return
+
+        try:
+            trace_id = self.agent.tracers[0].get_trace_id()  # type: ignore
+            logger.info(f"Trace id: {trace_id}")
+        except Exception as e:
+            logger.warning(f"Get tracer id failed as {e}")
+            return
+
     def save_tracing_file(self, session_id: str) -> str:
         if not isinstance(self.agent, Agent):
             logger.warning(

veadk/tracing/telemetry/opentelemetry_tracer.py

@@ -127,6 +127,16 @@ def _init_tracer_provider(self) -> None:
             self._processors.append(processor)
         logger.debug(f"Init OpentelemetryTracer with {len(self.exporters)} exporters.")
 
+    def get_trace_id(self) -> str:
+        if not self._inmemory_exporter:
+            return ""
+        try:
+            trace_id = hex(int(self._inmemory_exporter._real_exporter.trace_id))[2:]
+        except Exception:
+            return ""
+
+        return trace_id
+
     @override
     def dump(
         self,