MaxGekk commented on a change in pull request #23462: [SPARK-26546][SQL]
Caching of java.time.format.DateTimeFormatter
URL: https://github.com/apache/spark/pull/23462#discussion_r245511550
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeFormatterHelper.scala
##########
@@ -22,10 +22,40 @@ import java.time.chrono.IsoChronology
import java.time.format.{DateTimeFormatter, DateTimeFormatterBuilder,
ResolverStyle}
import java.time.temporal.{ChronoField, TemporalAccessor, TemporalQueries}
import java.util.Locale
+import java.util.concurrent.ConcurrentHashMap
trait DateTimeFormatterHelper {
+ protected def toInstantWithZoneId(temporalAccessor: TemporalAccessor,
zoneId: ZoneId): Instant = {
+ val localTime = if (temporalAccessor.query(TemporalQueries.localTime) ==
null) {
+ LocalTime.ofNanoOfDay(0)
+ } else {
+ LocalTime.from(temporalAccessor)
+ }
+ val localDate = LocalDate.from(temporalAccessor)
+ val localDateTime = LocalDateTime.of(localDate, localTime)
+ val zonedDateTime = ZonedDateTime.of(localDateTime, zoneId)
+ Instant.from(zonedDateTime)
+ }
+}
+
+object DateTimeFormatterHelper {
+ private val cache = new ConcurrentHashMap[(String, Locale),
DateTimeFormatter]()
+
+ def getFormatter(pattern: String, locale: Locale): DateTimeFormatter = {
+ val key = (pattern, locale)
+ var formatter = cache.get(key)
Review comment:
but it blocks other threads during lambda computation: `...Some attempted
update operations on this map by other threads may be blocked while computation
is in progress, so the computation should be short and simple...` but current
implementation does not.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
