feat: record source locations (#254)

google/cloud/logging_v2/handlers/handlers.py

@@ -126,6 +126,8 @@ def __init__(
         self.project_id = client.project
         self.resource = resource
         self.labels = labels
+        # add extra keys to log record
+        self.addFilter(CloudLoggingFilter(self.project_id))
 
     def emit(self, record):
         """Actually log the specified logging record.
@@ -138,25 +140,31 @@ def emit(self, record):
             record (logging.LogRecord): The record to be logged.
         """
         message = super(CloudLoggingHandler, self).format(record)
-        trace_id = getattr(record, "trace", None)
-        span_id = getattr(record, "span_id", None)
-        http_request = getattr(record, "http_request", None)
-        resource = getattr(record, "resource", self.resource)
         user_labels = getattr(record, "labels", {})
         # merge labels
         total_labels = self.labels if self.labels is not None else {}
         total_labels.update(user_labels)
         if len(total_labels) == 0:
             total_labels = None
+        # create source location object
+        if record.lineno and record.funcName and record.pathname:
+            source_location = {
+                "file": record.pathname,
+                "line": str(record.lineno),
+                "function": record.funcName,
+            }
+        else:
+            source_location = None
         # send off request
         self.transport.send(
             record,
             message,
-            resource=resource,
+            resource=getattr(record, "resource", self.resource),
             labels=(total_labels if total_labels else None),
-            trace=trace_id,
-            span_id=span_id,
-            http_request=http_request,
+            trace=(record.trace if record.trace else None),
+            span_id=getattr(record, "span_id", None),
+            http_request=(record.http_request if record.http_request else None),
+            source_location=source_location,
         )
 
 

tests/unit/handlers/test_handlers.py

@@ -257,11 +257,11 @@ def test_emit(self):
         logname = "loggername"
         message = "hello world"
         record = logging.LogRecord(logname, logging, None, None, message, None, None)
+        handler.filter(record)
         handler.emit(record)
-
         self.assertEqual(
             handler.transport.send_called_with,
-            (record, message, _GLOBAL_RESOURCE, None, None, None, None),
+            (record, message, _GLOBAL_RESOURCE, None, None, None, None, None),
         )
 
     def test_emit_manual_field_override(self):
@@ -286,6 +286,15 @@ def test_emit_manual_field_override(self):
         setattr(record, "resource", expected_resource)
         expected_labels = {"test-label": "manual"}
         setattr(record, "labels", expected_labels)
+        expected_source = {
+            "file": "test-file",
+            "line": str(1),
+            "function": "test-func",
+        }
+        setattr(record, "lineno", int(expected_source["line"]))
+        setattr(record, "funcName", expected_source["function"])
+        setattr(record, "pathname", expected_source["file"])
+        handler.filter(record)
         handler.emit(record)
 
         self.assertEqual(
@@ -298,6 +307,7 @@ def test_emit_manual_field_override(self):
                 expected_trace,
                 expected_span,
                 expected_http,
+                expected_source,
             ),
         )
 
@@ -413,6 +423,7 @@ def send(
         trace=None,
         span_id=None,
         http_request=None,
+        source_location=None,
     ):
         self.send_called_with = (
             record,
@@ -422,4 +433,5 @@ def send(
             trace,
             span_id,
             http_request,
+            source_location,
         )