cadonna commented on a change in pull request #10953:
URL: https://github.com/apache/kafka/pull/10953#discussion_r662807687
##########
File path:
streams/src/test/java/org/apache/kafka/streams/kstream/TimeWindowsTest.java
##########
@@ -103,6 +104,11 @@ public void gracePeriodShouldEnforceBoundaries() {
}
}
+ @Test
+ public void oldAPIShouldSetDefaultGracePeriod() {
+ assertEquals(DEPRECATED_OLD_24_HR_GRACE_PERIOD - 3L,
TimeWindows.of(ofMillis(3L)).gracePeriodMs());;
+ }
Review comment:
I think, we need additional tests:
```suggestion
@Test
public void deprecatedDefaultGracePeriodShouldBeOneDay() {
assertThat(DEPRECATED_OLD_24_HR_GRACE_PERIOD,
is(Duration.ofDays(1).toMillis()));
}
@Test
public void
oldAPIShouldSetGracePeriodToDefaultGracePeriodMinusWindowSize() {
final Duration windowSize = Duration.ofMillis(3L);
assertThat(TimeWindows.of(windowSize).gracePeriodMs(),
is(DEPRECATED_OLD_24_HR_GRACE_PERIOD - windowSize.toMillis()));
}
@Test
public void
oldAPIShouldSetGracePeriodToZeroWhenWindowSizeIsDefaultGracePeriod()() {
final Duration windowSize =
Duration.ofMillis(DEPRECATED_OLD_24_HR_GRACE_PERIOD);
assertThat(TimeWindows.of(windowSize).gracePeriodMs(), is(0L));
}
@Test
public void
oldAPIShouldSetGracePeriodToZeroWhenWindowSizeGreaterDefaultGracePeriod()() {
final Duration windowSize =
Duration.ofMillis(DEPRECATED_OLD_24_HR_GRACE_PERIOD + 1);
assertThat(TimeWindows.of(windowSize).gracePeriodMs(), is(0L));
}
```
The first test makes the deprecated default grace period robust against
refactorings.
The other three tests correspond to the three important cases, namely:
- window size less than default grace period
- window size equal to default grace period
- window size greater than default grace period
You might need some imports for this code to work.
Similar needs to be done for `SessionWindows`.
##########
File path:
streams/src/main/java/org/apache/kafka/streams/kstream/TimeWindows.java
##########
@@ -146,7 +146,7 @@ public static TimeWindows of(final Duration size) throws
IllegalArgumentExceptio
final String msgPrefix = prepareMillisCheckFailMsgPrefix(size, "size");
final long sizeMs = validateMillisecondDuration(size, msgPrefix);
- return new TimeWindows(sizeMs, sizeMs,
DEPRECATED_OLD_24_HR_GRACE_PERIOD);
+ return new TimeWindows(sizeMs, sizeMs,
Math.max(DEPRECATED_OLD_24_HR_GRACE_PERIOD - sizeMs, 0));
Review comment:
The javadoc `@return` needs to be adapted.
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