Add span exporter property to batch span processor (open-telemetry#4621)

* Add span exporter property to batch span processor

* Add test

* Add changelog

* Update CHANGELOG.md

---------

Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>

Author: DylanRussell

CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - opentelemetry-sdk: Fix invalid `type: ignore` that causes mypy to ignore the whole file
   ([#4618](https://github.com/open-telemetry/opentelemetry-python/pull/4618))
+- Add `span_exporter` property back to `BatchSpanProcessor` class
+  ([#4621](https://github.com/open-telemetry/opentelemetry-python/pull/4621))
 
 ## Version 1.34.0/0.55b0 (2025-06-04)
 

opentelemetry-sdk/src/opentelemetry/sdk/trace/export/__init__.py

@@ -177,6 +177,11 @@ def __init__(
             "Span",
         )
 
+    # Added for backward compatibility. Not recommended to directly access/use underlying exporter.
+    @property
+    def span_exporter(self):
+        return self._batch_processor._exporter  # pylint: disable=protected-access
+
     def on_start(
         self, span: Span, parent_context: Context | None = None
     ) -> None:

opentelemetry-sdk/tests/trace/export/test_export.py

@@ -150,6 +150,11 @@ def test_simple_span_processor_not_sampled(self):
 # before the end of the test, otherwise the worker thread will continue
 # to run after the end of the test.
 class TestBatchSpanProcessor(unittest.TestCase):
+    def test_get_span_exporter(self):
+        exporter = MySpanExporter(destination=[])
+        batch_span_processor = export.BatchSpanProcessor(exporter)
+        self.assertEqual(exporter, batch_span_processor.span_exporter)
+
     @mock.patch.dict(
         "os.environ",
         {