uncleGen commented on a change in pull request #26201: [SPARK-29543][SS][UI]
Init structured streaming ui
URL: https://github.com/apache/spark/pull/26201#discussion_r338354384
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File path: core/src/main/scala/org/apache/spark/ui/UIUtils.scala
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@@ -119,6 +119,59 @@ private[spark] object UIUtils extends Logging {
}
}
+ // SimpleDateFormat is not thread-safe. Don't expose it to avoid improper
use.
+ private val batchTimeFormat = new ThreadLocal[SimpleDateFormat]() {
+ override def initialValue(): SimpleDateFormat =
+ new SimpleDateFormat("yyyy/MM/dd HH:mm:ss", Locale.US)
+ }
+
+ private val batchTimeFormatWithMilliseconds = new
ThreadLocal[SimpleDateFormat]() {
+ override def initialValue(): SimpleDateFormat =
+ new SimpleDateFormat("yyyy/MM/dd HH:mm:ss.SSS", Locale.US)
+ }
+
+ /**
+ * If `batchInterval` is less than 1 second, format `batchTime` with
milliseconds. Otherwise,
+ * format `batchTime` without milliseconds.
+ *
+ * @param batchTime the batch time to be formatted
+ * @param batchInterval the batch interval
+ * @param showYYYYMMSS if showing the `yyyy/MM/dd` part. If it's false, the
return value wll be
+ * only `HH:mm:ss` or `HH:mm:ss.SSS` depending on
`batchInterval`
+ * @param timezone only for test
+ */
+ def formatBatchTime(
Review comment:
FYI: this is move from `org.apache.spark.streaming.ui.UIUtils` with no change
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