public static <T extends MetricCollector> T getMetricCollector() {
if (mc == null) {
if (isDefaultMetricsEnabled()) enableDefaultMetrics();
}
@SuppressWarnings("unchecked")
T t = (T) (mc == null ? MetricCollector.NONE : mc);
return t;
}
@Test
public void test() {
// by default, it's disabled
assertFalse(AwsSdkMetrics.isDefaultMetricsEnabled());
// won't be anble to enable unless the default impl library is on the classpath
assertFalse(AwsSdkMetrics.enableDefaultMetrics());
assertFalse(AwsSdkMetrics.isDefaultMetricsEnabled());
assertSame(RequestMetricCollector.NONE, AwsSdkMetrics.getRequestMetricCollector());
assertFalse(AwsSdkMetrics.isDefaultMetricsEnabled());
// effectively no effect
AwsSdkMetrics.disableMetrics();
assertFalse(AwsSdkMetrics.isDefaultMetricsEnabled());
}
@Override
public boolean enableDefaultMetrics() {
return AwsSdkMetrics.enableDefaultMetrics();
}
/**
* By default the AWS SDK metric collection is disabled. Enabling it should fail unless the
* necessary CloudWatch related jars are on the classpath. Therefore, this test is expected to
* fail in enabling the default metric collection, but have absolutely no impact otherwise.
*/
@Test
public void enableDefaultMetrics() {
Assert.assertFalse(AwsSdkMetrics.enableDefaultMetrics());
}