| # |
| # 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) |