Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/18107#discussion_r118465998
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/StateStore.scala
---
@@ -105,25 +102,42 @@ trait StateStore {
/** Trait representing a provider of a specific version of a
[[StateStore]]. */
trait StateStoreProvider {
- /** Get the store with the existing version. */
+ def init(
+ stateStoreId: StateStoreId,
+ keySchema: StructType,
+ valueSchema: StructType,
+ indexOrdinal: Option[Int], // for sorting the data
+ storeConfs: StateStoreConf,
+ hadoopConf: Configuration): Unit
+
+ def id: StateStoreId
+
+ def close(): Unit
+
def getStore(version: Long): StateStore
/** Optional method for providers to allow for background maintenance */
def doMaintenance(): Unit = { }
}
-
-/** Trait representing updates made to a [[StateStore]]. */
-sealed trait StoreUpdate {
- def key: UnsafeRow
- def value: UnsafeRow
+object StateStoreProvider {
+ def instantiate(
--- End diff --
add docs.
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