feat(aws-lambda): Detect Lambda triggers

sentry_sdk/consts.py

@@ -718,6 +718,12 @@ class SPANDATA:
     Example: "my_function"
     """
 
+    FAAS_TRIGGER = "faas.trigger"
+    """
+    The type of the trigger on which the function is executed.
+    Example: "pubsub"
+    """
+
     FAAS_VERSION = "faas.version"
     """
     The version of the function that was invoked.

sentry_sdk/integrations/aws_lambda/_handler.py

@@ -12,6 +12,7 @@
     _get_user_from_event,
     _make_request_event_processor,
 )
+from sentry_sdk.integrations.aws_lambda._trigger import _get_trigger
 from sentry_sdk.integrations.aws_lambda.consts import (
     CLOUD_PLATFORM,
     CLOUD_PROVIDER,
@@ -64,10 +65,8 @@ def sentry_handler(
 
         if isinstance(aws_event, list) and len(aws_event) >= 1:
             request_data = aws_event[0]
-            batch_size = len(aws_event)
         else:
             request_data = aws_event
-            batch_size = 1
 
         if not isinstance(request_data, dict):
             # If we're not dealing with a dictionary, we won't be able to get
@@ -160,11 +159,13 @@ def sentry_handler(
                 SPANDATA.SENTRY_SEGMENT_NAME_SOURCE: SegmentNameSource.COMPONENT,
                 SPANDATA.CLOUD_PROVIDER: CLOUD_PROVIDER,
                 SPANDATA.CLOUD_PLATFORM: CLOUD_PLATFORM,
-                SPANDATA.MESSAGING_BATCH_MESSAGE_COUNT: batch_size,
                 **header_attributes,
                 **additional_attributes,
             }
 
+            with capture_internal_exceptions():
+                attributes[SPANDATA.FAAS_TRIGGER] = _get_trigger(aws_event)
+
             with capture_internal_exceptions():
                 invoked_function_arn = aws_context.invoked_function_arn
                 function_version = aws_context.function_version

sentry_sdk/integrations/aws_lambda/_trigger.py

@@ -0,0 +1,89 @@
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from typing import Any, Optional
+
+# `faas.trigger` of each `eventSource` of `Records` or of a top-level `eventSource`.
+# https://docs.aws.amazon.com/lambda/latest/dg/lambda-services.html
+_TRIGGERS: "dict[Optional[str], str]" = {
+    "aws:sqs": "pubsub",
+    "aws:sns": "pubsub",
+    "aws:kinesis": "pubsub",
+    "aws:ses": "pubsub",
+    "aws:kafka": "pubsub",
+    "SelfManagedKafka": "pubsub",
+    "aws:mq": "pubsub",
+    "aws:rmq": "pubsub",
+    "aws:s3": "datasource",
+    "aws:dynamodb": "datasource",
+    "aws:docdb": "datasource",
+}
+
+# https://docs.aws.amazon.com/eventbridge/latest/ref/overiew-event-structure.html
+_EVENTBRIDGE_KEYS = frozenset(
+    (
+        "version",
+        "id",
+        "detail-type",
+        "source",
+        "account",
+        "time",
+        "region",
+        "resources",
+        "detail",
+    )
+)
+
+
+def _get_records_source(records: "list[Any]") -> "Optional[str]":
+    """The records' `eventSource`, one per event; SNS spells it `EventSource`."""
+    return records[0].get("eventSource") or records[0].get("EventSource")
+
+
+def _is_appsync_event(aws_event: "Any") -> bool:
+    # https://docs.aws.amazon.com/appsync/latest/devguide/resolver-context-reference-js.html
+    return (
+        isinstance(aws_event, dict)
+        and "arguments" in aws_event
+        and "fieldName" in aws_event.get("info", {})
+    )
+
+
+def _get_trigger(aws_event: "Any") -> str:
+    """`faas.trigger` from the envelope of the delivered event, never from its payload."""
+    if isinstance(aws_event, list):
+        # an AppSync batch resolver delivers a list of resolver events.
+        if aws_event and all(_is_appsync_event(event) for event in aws_event):
+            return "http"
+        return "other"
+
+    if not isinstance(aws_event, dict):
+        return "other"
+
+    # API Gateway REST APIs and ALB send `httpMethod`, HTTP APIs and function URLs
+    # `requestContext.http`.
+    request_context = aws_event.get("requestContext")
+    if request_context is not None and (
+        "httpMethod" in aws_event or "http" in request_context
+    ):
+        return "http"
+
+    if _is_appsync_event(aws_event):
+        return "http"
+
+    records = aws_event.get("Records")
+    if records:
+        # CloudFront and Lambda@Edge records have no `eventSource`.
+        if "cf" in records[0]:
+            return "http"
+        return _TRIGGERS.get(_get_records_source(records), "other")
+
+    if _EVENTBRIDGE_KEYS <= aws_event.keys():
+        if (
+            aws_event["source"] == "aws.events"
+            and aws_event["detail-type"] == "Scheduled Event"
+        ):
+            return "timer"
+        return "pubsub"
+
+    return _TRIGGERS.get(aws_event.get("eventSource"), "other")

tests/integrations/aws_lambda/test_aws_lambda.py

@@ -771,7 +771,8 @@ def test_no_error(lambda_client, test_environment):
     assert _get_span_attr(attrs, SPANDATA.AWS_LOG_STREAM_NAMES) == [
         LATEST_FUNCTION_VERSION
     ]
-    assert _get_span_attr(attrs, SPANDATA.MESSAGING_BATCH_MESSAGE_COUNT) == 1
+    assert _get_span_attr(attrs, SPANDATA.FAAS_TRIGGER) == "other"
+    assert SPANDATA.MESSAGING_BATCH_MESSAGE_COUNT not in attrs
 
 
 def test_error(lambda_client, test_environment):
@@ -825,7 +826,107 @@ def test_error(lambda_client, test_environment):
     assert _get_span_attr(attrs, SPANDATA.AWS_LOG_STREAM_NAMES) == [
         LATEST_FUNCTION_VERSION
     ]
-    assert _get_span_attr(attrs, SPANDATA.MESSAGING_BATCH_MESSAGE_COUNT) == 1
+    assert _get_span_attr(attrs, SPANDATA.FAAS_TRIGGER) == "other"
+    assert SPANDATA.MESSAGING_BATCH_MESSAGE_COUNT not in attrs
+
+
+def _sqs_record():
+    return {
+        "messageId": "059f36b4-87a3-44ab-83d2-661975830a7d",
+        "body": "{}",
+        "eventSource": "aws:sqs",
+        "eventSourceARN": "arn:aws:sqs:us-east-1:012345678912:orders",
+    }
+
+
+def _sns_record():
+    return {
+        "EventSource": "aws:sns",
+        "Sns": {"TopicArn": "arn:aws:sns:us-east-1:012345678912:alerts"},
+    }
+
+
+def _appsync_event():
+    return {
+        "arguments": {"id": "1"},
+        "info": {"fieldName": "getOrder", "parentTypeName": "Query"},
+    }
+
+
+def _eventbridge_event(source, detail_type):
+    return {
+        "version": "0",
+        "id": "53dc4d37-cffa-4f76-80c9-8b7d4a4d2eaa",
+        "detail-type": detail_type,
+        "source": source,
+        "account": "012345678912",
+        "time": "2026-10-26T12:00:00Z",
+        "region": "us-east-1",
+        "resources": [],
+        "detail": {},
+    }
+
+
+@pytest.mark.parametrize(
+    "aws_event,trigger",
+    [
+        pytest.param(
+            {"httpMethod": "GET", "path": "/", "requestContext": {"stage": "prod"}},
+            "http",
+            id="api-gateway-rest",
+        ),
+        pytest.param(
+            {
+                "version": "2.0",
+                "routeKey": "GET /",
+                "requestContext": {"http": {"method": "GET"}},
+            },
+            "http",
+            id="api-gateway-http",
+        ),
+        pytest.param(
+            {"Records": [{"cf": {"request": {"uri": "/"}}}]},
+            "http",
+            id="cloudfront",
+        ),
+        pytest.param(_appsync_event(), "http", id="appsync"),
+        pytest.param([_appsync_event(), _appsync_event()], "http", id="appsync-batch"),
+        pytest.param({"Records": [_sqs_record(), _sqs_record()]}, "pubsub", id="sqs"),
+        pytest.param({"Records": [_sns_record()]}, "pubsub", id="sns"),
+        pytest.param(
+            {"eventSource": "aws:kafka", "records": {"orders-0": [{}]}},
+            "pubsub",
+            id="msk",
+        ),
+        pytest.param(
+            _eventbridge_event("aws.s3", "Object Created"),
+            "pubsub",
+            id="eventbridge",
+        ),
+        pytest.param(
+            _eventbridge_event("aws.events", "Scheduled Event"),
+            "timer",
+            id="eventbridge-schedule",
+        ),
+        pytest.param({"Records": [{"eventSource": "aws:s3"}]}, "datasource", id="s3"),
+        pytest.param(
+            [{"good dog": "Maisey"}, {"good dog": "Charlie"}],
+            "other",
+            id="list",
+        ),
+    ],
+)
+def test_trigger(lambda_client, test_environment, aws_event, trigger):
+    lambda_client.invoke(
+        FunctionName="BasicOkSpanStreaming",
+        Payload=json.dumps(aws_event),
+    )
+
+    (segment_span,) = [
+        s for s in test_environment["server"].span_items if s["is_segment"]
+    ]
+    attrs = segment_span["attributes"]
+    assert _get_span_attr(attrs, SPANDATA.FAAS_TRIGGER) == trigger
 
 
 def test_trace_continuation(lambda_client, test_environment):