StreamingQueryTab¶

StreamingQueryTab is a SparkUITab (Spark Core) with StreamingQuery URL prefix.

When created, StreamingQueryTab attaches the following pages:

• StreamingQueryPage
• StreamingQueryStatisticsPage

StreamingQueryTab can be turned on/off using spark.sql.streaming.ui.enabled.

Creating Instance¶

StreamingQueryTab takes the following to be created:

• StreamingQueryStatusStore
• SparkUI (Spark Core)

StreamingQueryTab is created when:

• StreamingQueryHistoryServerPlugin is requested to setupUI
• SharedState (Spark SQL) is created (with spark.sql.streaming.ui.enabled enabled)

StreamingQueryStatusStore¶

StreamingQueryTab is given a StreamingQueryStatusStore when created.

The StreamingQueryStatusStore is used to fetch the streaming query data in the attached pages:

• StreamingQueryPage
• StreamingQueryStatisticsPage

Tab Name¶

name: String

name is part of the WebUITab (Spark Core) abstraction.

name is Structured Streaming.