# Copyright (c) 2019, MD2K Center of Excellence
# - Nasir Ali <nasir.ali08@gmail.com>
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[docs]def get_or_create_sc(type="sparkContext", name="CerebralCortex-Kernal", enable_spark_ui=False):
"""
get or create spark context
Args:
type (str): type (sparkContext, SparkSessionBuilder, sparkSession, sqlContext). (default="sparkContext")
name (str): spark app name (default="CerebralCortex-Kernal")
Returns:
"""
from pyspark.sql import SparkSession
ss = SparkSession.builder
if name:
ss.appName(name)
ss.config("spark.streaming.backpressure.enabled", True)
ss.config("spark.streaming.backpressure.initialRate", 1)
ss.config("spark.streaming.kafka.maxRatePerPartition", 2)
ss.config("spark.sql.session.timeZone", "UTC")
if enable_spark_ui==False:
ss.config("spark.ui.enabled", True)
sparkSession = ss.getOrCreate()
sc = sparkSession.sparkContext
sc.setLogLevel("ERROR")
#sqlContext = SQLContext(sc)
if type=="SparkSessionBuilder":
return sc
elif type=="sparkContext":
return sc
elif type=="sparkSession":
return sparkSession
elif type=="sqlContext":
return sparkSession
else:
raise ValueError("Unknown type.")