Object/Trait

org.apache.spark.sql.execution.streaming.state

StateStore

Related Docs: trait StateStore | package state

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object StateStore extends Logging

Companion object to StateStore that provides helper methods to create and retrieve stores by their unique ids. In addition, when a SparkContext is active (i.e. SparkEnv.get is not null), it also runs a periodic background task to do maintenance on the loaded stores. For each store, it uses the StateStoreCoordinator to ensure whether the current loaded instance of the store is the active instance. Accordingly, it either keeps it loaded and performs maintenance, or unloads the store.

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Value Members

  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  3. final def ==(arg0: Any): Boolean

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  4. val MAINTENANCE_INTERVAL_CONFIG: String

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  5. val MAINTENANCE_INTERVAL_DEFAULT_SECS: Int

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  6. final def asInstanceOf[T0]: T0

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  7. def clone(): AnyRef

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  8. final def eq(arg0: AnyRef): Boolean

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  9. def equals(arg0: Any): Boolean

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  10. def finalize(): Unit

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  11. def get(storeId: StateStoreId, keySchema: StructType, valueSchema: StructType, version: Long, storeConf: StateStoreConf, hadoopConf: Configuration): StateStore

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    Get or create a store associated with the id.

  12. final def getClass(): Class[_]

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  13. def hashCode(): Int

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  14. def initializeLogIfNecessary(isInterpreter: Boolean): Unit

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    Logging

  15. final def isDebugEnabled: Boolean

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  16. final def isInfoEnabled: Boolean

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  17. final def isInstanceOf[T0]: Boolean

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  18. def isLoaded(storeId: StateStoreId): Boolean

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    Whether a state store provider is loaded or not

  19. def isMaintenanceRunning: Boolean

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  20. final def isTraceEnabled: Boolean

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    Logging

  21. def log: Logger

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    Logging

  22. def logDebug(msg: ⇒ String, throwable: Throwable): Unit

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  23. def logDebug(msg: ⇒ String): Unit

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  24. def logError(msg: ⇒ String, throwable: Throwable): Unit

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  25. def logError(msg: ⇒ String): Unit

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  26. def logInfo(msg: ⇒ String, throwable: Throwable): Unit

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  27. def logInfo(msg: ⇒ String): Unit

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  28. def logName: String

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  29. def logTrace(msg: ⇒ String, throwable: Throwable): Unit

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  30. def logTrace(msg: ⇒ String): Unit

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  31. def logWarning(msg: ⇒ String, throwable: Throwable): Unit

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  32. def logWarning(msg: ⇒ String): Unit

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  33. final def ne(arg0: AnyRef): Boolean

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  34. final def notify(): Unit

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  35. final def notifyAll(): Unit

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  36. def stop(): Unit

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    Unload and stop all state store providers

  37. final def synchronized[T0](arg0: ⇒ T0): T0

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  38. def toString(): String

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  39. def unload(storeId: StateStoreId): Unit

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    Unload a state store provider

  40. final def wait(): Unit

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  41. final def wait(arg0: Long, arg1: Int): Unit

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  42. final def wait(arg0: Long): Unit

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Inherited from Logging

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