object SparkContext extends Logging
The SparkContext object contains a number of implicit conversions and parameters for use with various Spark features.
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- SparkContext.scala
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- def getOrCreate(): SparkContext
This function may be used to get or instantiate a SparkContext and register it as a singleton object.
This function may be used to get or instantiate a SparkContext and register it as a singleton object. Because we can only have one active SparkContext per JVM, this is useful when applications may wish to share a SparkContext.
This method allows not passing a SparkConf (useful if just retrieving).
- returns
current
SparkContext(or a new one if wasn't created before the function call)
- def getOrCreate(config: SparkConf): SparkContext
This function may be used to get or instantiate a SparkContext and register it as a singleton object.
This function may be used to get or instantiate a SparkContext and register it as a singleton object. Because we can only have one active SparkContext per JVM, this is useful when applications may wish to share a SparkContext.
- config
SparkConfigthat will be used for initialisation of theSparkContext- returns
current
SparkContext(or a new one if it wasn't created before the function call)
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- def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
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- def jarOfClass(cls: Class[_]): Option[String]
Find the JAR from which a given class was loaded, to make it easy for users to pass their JARs to SparkContext.
Find the JAR from which a given class was loaded, to make it easy for users to pass their JARs to SparkContext.
- cls
class that should be inside of the jar
- returns
jar that contains the Class,
Noneif not found
- def jarOfObject(obj: AnyRef): Option[String]
Find the JAR that contains the class of a particular object, to make it easy for users to pass their JARs to SparkContext.
Find the JAR that contains the class of a particular object, to make it easy for users to pass their JARs to SparkContext. In most cases you can call jarOfObject(this) in your driver program.
- obj
reference to an instance which class should be inside of the jar
- returns
jar that contains the class of the instance,
Noneif not found
- def log: Logger
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- def logDebug(msg: => String): Unit
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- def logName: String
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- def logWarning(msg: => String, throwable: Throwable): Unit
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- Deprecated
(Since version 9)