bogao007 commented on code in PR #41752:
URL: https://github.com/apache/spark/pull/41752#discussion_r1244154732
##########
connector/connect/client/jvm/src/main/scala/org/apache/spark/sql/streaming/StreamingQueryManager.scala:
##########
@@ -125,6 +129,45 @@ class StreamingQueryManager private[sql] (sparkSession:
SparkSession) {
executeManagerCmd(_.setResetTerminated(true))
}
+ /**
+ * Register a [[StreamingQueryListener]] to receive up-calls for life cycle
events of
+ * [[StreamingQuery]].
+ *
+ * @since 3.5.0
+ */
+ def addListener(listener: StreamingQueryListener): Unit = {
+ executeManagerCmd(
+ _.getAddListenerBuilder
+ .setListenerPayload(ByteString.copyFrom(Utils
+ .serialize(StreamingListenerPacket(listener)))))
+ }
+
+ /**
+ * Deregister a [[StreamingQueryListener]].
+ *
+ * @since 3.5.0
+ */
+ def removeListener(listener: StreamingQueryListener): Unit = {
+ executeManagerCmd(
+ _.getRemoveListenerBuilder
+ .setListenerPayload(ByteString.copyFrom(Utils
+ .serialize(StreamingListenerPacket(listener)))))
+ }
+
+ /**
+ * List all [[StreamingQueryListener]]s attached to this
[[StreamingQueryManager]].
+ *
+ * @since 3.5.0
+ */
+ def listListeners(): Array[StreamingQueryListener] = {
+
executeManagerCmd(_.setListListeners(true)).getListListeners.getListenersList.asScala.map
{
+ listener =>
+
Utils.deserialize[StreamingListenerPacket](listener.getListenerPayload.toByteArray,
Review Comment:
It seems that directly deserializing with `StreamingQueryListener` would
lose local variables and other methods defined in the custom listener that
extends `StreamingQueryListener`. Wrapping it with a `StreamingListenerPacket`
seems not able to solve the problem.
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