fix(tracing): fix empty local tracing file

Author: BhAem

veadk/tracing/telemetry/exporters/inmemory_exporter.py

@@ -106,3 +106,6 @@ def __init__(self, name: str = "inmemory_exporter") -> None:
 
         self._exporter = _InMemoryExporter()
         self.processor = _InMemorySpanProcessor(self._exporter)
+
+
+_INMEMORY_EXPORTER_INSTANCE = InMemoryExporter()

veadk/tracing/telemetry/opentelemetry_tracer.py

@@ -31,6 +31,7 @@
 from veadk.tracing.telemetry.exporters.apmplus_exporter import APMPlusExporter
 from veadk.tracing.telemetry.exporters.base_exporter import BaseExporter
 from veadk.tracing.telemetry.exporters.inmemory_exporter import InMemoryExporter
+from veadk.tracing.telemetry.exporters.inmemory_exporter import _INMEMORY_EXPORTER_INSTANCE
 from veadk.utils.logger import get_logger
 from veadk.utils.patches import patch_google_adk_telemetry
 
@@ -110,7 +111,7 @@ def _init_global_tracer_provider(self) -> None:
                     f"Add span processor for exporter `{exporter.__class__.__name__}` to OpentelemetryTracer failed."
                 )
 
-        self._inmemory_exporter = InMemoryExporter()
+        self._inmemory_exporter = _INMEMORY_EXPORTER_INSTANCE
         if self._inmemory_exporter.processor:
             # make sure the in memory exporter processor is added at index 0
             # because we use this to record all spans

veadk/tracing/telemetry/telemetry.py

@@ -28,6 +28,7 @@
     LLMAttributesParams,
     ToolAttributesParams,
 )
+from veadk.tracing.telemetry.exporters.inmemory_exporter import _INMEMORY_EXPORTER_INSTANCE
 from veadk.utils.logger import get_logger
 
 logger = get_logger(__name__)
@@ -64,13 +65,10 @@ def set_common_attributes(
         )
         return
 
-    if isinstance(invocation_context.agent, Agent) and invocation_context.agent.tracers:
+    if isinstance(invocation_context.agent, Agent):
         try:
-            from veadk.tracing.telemetry.opentelemetry_tracer import OpentelemetryTracer
-
-            tracer: OpentelemetryTracer = invocation_context.agent.tracers[0]  # type: ignore
-            spans = tracer._inmemory_exporter.processor.spans  #  # type: ignore
-
+            spans = _INMEMORY_EXPORTER_INSTANCE.processor.spans  #  # type: ignore
+            
             spans_in_current_trace = [
                 span
                 for span in spans