Changing default transport for stackdriver exporter (#929)

Author: aravinsiva

contrib/opencensus-ext-stackdriver/CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
 ## Unreleased
+  - Change default transporter in stackdriver exporter
+  ([#929](https://github.com/census-instrumentation/opencensus-python/pull/929))
 
 ## 0.7.3
 Released 2020-06-29

contrib/opencensus-ext-stackdriver/README.rst

@@ -35,20 +35,19 @@ This example shows how to report the traces to Stackdriver Trace:
     pip install google-cloud-trace
     pipenv install google-cloud-trace
 
-By default, traces are exported synchronously, which introduces latency during
-your code's execution. To avoid blocking code execution, you can initialize
-your exporter to use a background thread.
+By default, traces are exported asynchronously, to reduce latency during
+your code's execution. If you would like to export data on the main thread
+use the synchronous transporter:
 
-This example shows how to configure OpenCensus to use a background thread:
 
 .. code:: python
 
-    from opencensus.common.transports.async_ import AsyncTransport
+    from opencensus.common.transports.sync import SyncTransport
     from opencensus.ext.stackdriver import trace_exporter as stackdriver_exporter
     from opencensus.trace import tracer as tracer_module
 
     exporter = stackdriver_exporter.StackdriverExporter(
-        project_id='your_cloud_project', transport=AsyncTransport)
+        project_id='your_cloud_project', transport=SyncTransport)
     tracer = tracer_module.Tracer(exporter=exporter)
 
 Stats

contrib/opencensus-ext-stackdriver/opencensus/ext/stackdriver/trace_exporter/__init__.py

@@ -23,7 +23,7 @@
     k8s_utils,
     monitored_resource,
 )
-from opencensus.common.transports import sync
+from opencensus.common.transports.async_ import AsyncTransport
 from opencensus.common.version import __version__
 from opencensus.trace import attributes_helper, base_exporter, span_data
 from opencensus.trace.attributes import Attributes
@@ -180,7 +180,7 @@ class StackdriverExporter(base_exporter.Exporter):
     """
 
     def __init__(self, client=None, project_id=None,
-                 transport=sync.SyncTransport):
+                 transport=AsyncTransport):
         # The client will handle the case when project_id is None
         if client is None:
             client = Client(project=project_id)