zentol commented on a change in pull request #7459: [FLINK-11300] Make
MetricFetcher update interval configurable
URL: https://github.com/apache/flink/pull/7459#discussion_r247066277
##########
File path:
flink-runtime/src/test/java/org/apache/flink/runtime/rest/handler/legacy/metrics/MetricFetcherTest.java
##########
@@ -184,4 +193,52 @@ public String getValue() {
return dump;
}
+
+ @Test
+ public void testLongUpdateInterval() {
+ final long updateInterval = 1000L;
+ final AtomicInteger requestMetricQueryServicePathsCounter = new
AtomicInteger(0);
+ final RestfulGateway restfulGateway =
createRestfulGateway(requestMetricQueryServicePathsCounter);
+
+ final MetricFetcher<RestfulGateway> fetcher =
createMetricFetcher(updateInterval, restfulGateway);
+
+ fetcher.update();
+ fetcher.update();
+
+ assertThat(requestMetricQueryServicePathsCounter.get(), is(1));
+ }
+
+ @Test
+ public void testShortUpdateInterval() throws InterruptedException {
+ final long updateInterval = 1L;
+ final AtomicInteger requestMetricQueryServicePathsCounter = new
AtomicInteger(0);
+ final RestfulGateway restfulGateway =
createRestfulGateway(requestMetricQueryServicePathsCounter);
+
+ final MetricFetcher<RestfulGateway> fetcher =
createMetricFetcher(updateInterval, restfulGateway);
+
+ fetcher.update();
+ Thread.sleep(2L * updateInterval);
+ fetcher.update();
+
+ assertThat(requestMetricQueryServicePathsCounter.get(), is(2));
+ }
+
+ @Nonnull
+ private MetricFetcher<RestfulGateway> createMetricFetcher(long
updateInterval, RestfulGateway restfulGateway) {
+ return new MetricFetcher<>(
+ () -> CompletableFuture.completedFuture(restfulGateway),
+ path -> new CompletableFuture<>(),
Review comment:
Returning an already completed future should be a safer default
implementation.
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