1 files changed, 78 insertions, 0 deletions
diff --git a/python/pyspark/traceback_utils.py b/python/pyspark/traceback_utils.py
new file mode 100644
index 0000000000..bb8646df2b
--- /dev/null
+++ b/python/pyspark/traceback_utils.py
@@ -0,0 +1,78 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from collections import namedtuple
+import os
+import traceback
+
+
+CallSite = namedtuple("CallSite", "function file linenum")
+
+
+def first_spark_call():
+    """
+    Return a CallSite representing the first Spark call in the current call stack.
+    """
+    tb = traceback.extract_stack()
+    if len(tb) == 0:
+        return None
+    file, line, module, what = tb[len(tb) - 1]
+    sparkpath = os.path.dirname(file)
+    first_spark_frame = len(tb) - 1
+    for i in range(0, len(tb)):
+        file, line, fun, what = tb[i]
+        if file.startswith(sparkpath):
+            first_spark_frame = i
+            break
+    if first_spark_frame == 0:
+        file, line, fun, what = tb[0]
+        return CallSite(function=fun, file=file, linenum=line)
+    sfile, sline, sfun, swhat = tb[first_spark_frame]
+    ufile, uline, ufun, uwhat = tb[first_spark_frame - 1]
+    return CallSite(function=sfun, file=ufile, linenum=uline)
+
+
+class SCCallSiteSync(object):
+    """
+    Helper for setting the spark context call site.
+
+    Example usage:
+    from pyspark.context import SCCallSiteSync
+    with SCCallSiteSync(<relevant SparkContext>) as css:
+        <a Spark call>
+    """
+
+    _spark_stack_depth = 0
+
+    def __init__(self, sc):
+        call_site = first_spark_call()
+        if call_site is not None:
+            self._call_site = "%s at %s:%s" % (
+                call_site.function, call_site.file, call_site.linenum)
+        else:
+            self._call_site = "Error! Could not extract traceback info"
+        self._context = sc
+
+    def __enter__(self):
+        if SCCallSiteSync._spark_stack_depth == 0:
+            self._context._jsc.setCallSite(self._call_site)
+        SCCallSiteSync._spark_stack_depth += 1
+
+    def __exit__(self, type, value, tb):
+        SCCallSiteSync._spark_stack_depth -= 1
+        if SCCallSiteSync._spark_stack_depth == 0:
+            self._context._jsc.setCallSite(None)