@Test
public void aMethodAnnotatedWithBothAMeteredAndAnExceptionCounter() throws Exception {
final Metric meteredMetric =
registry
.allMetrics()
.get(new MetricName(InstrumentedWithExceptionMetered.class, "meteredAndException"));
final Metric errorMetric =
registry
.allMetrics()
.get(
new MetricName(
InstrumentedWithExceptionMetered.class, "meteredAndExceptionExceptions"));
assertThat("Guice creates a metric", meteredMetric, is(notNullValue()));
assertThat("Guice creates a meter", meteredMetric, is(instanceOf(Meter.class)));
assertThat("Guice creates a metric", errorMetric, is(notNullValue()));
assertThat("Guice creates an exception meter", errorMetric, is(instanceOf(Meter.class)));
// Counts should start at zero
assertThat(
"Meter Metric should be zero when initialised", ((Meter) meteredMetric).count(), is(0L));
assertThat(
"Error Metric should be zero when initialised", ((Meter) errorMetric).count(), is(0L));
// Invoke, but don't throw an exception
instance.meteredAndException(null);
assertThat(
"Expected the meter metric to be marked on invocation",
((Meter) meteredMetric).count(),
is(1L));
assertThat(
"Expected the exception metric to be zero since no exceptions thrown",
((Meter) errorMetric).count(),
is(0L));
// Invoke and throw an exception
try {
instance.meteredAndException(new RuntimeException());
fail("Should have thrown an exception");
} catch (Exception e) {
}
assertThat(
"Expected a count of 2, one for each invocation", ((Meter) meteredMetric).count(), is(2L));
assertThat(
"Expected exception count to be 1 as one (of two) invocations threw an exception",
((Meter) errorMetric).count(),
is(1L));
}
@Test
public void anExceptionMeteredAnnotatedMethod_WithExtraOptions() throws Exception {
try {
instance.causeAnOutOfBoundsException();
} catch (ArrayIndexOutOfBoundsException e) {
}
final Metric metric =
registry.allMetrics().get(new MetricName(InstrumentedWithExceptionMetered.class, "things"));
assertMetricIsSetup(metric);
assertThat("Guice creates a meter which gets marked", ((Meter) metric).count(), is(1L));
assertThat(
"Guice creates a meter with the given event type",
((Meter) metric).eventType(),
is("poops"));
assertThat(
"Guice creates a meter with the given rate unit",
((Meter) metric).rateUnit(),
is(TimeUnit.MINUTES));
}
@Test
public void anExceptionMeteredAnnotatedMethod_WithGroupTypeAndName() throws Exception {
final Metric metric = registry.allMetrics().get(new MetricName("g", "t", "n"));
assertMetricIsSetup(metric);
assertThat("Metric intialises to zero", ((Meter) metric).count(), is(0L));
try {
instance.explodeForMetricWithGroupTypeAndName();
fail("Expected an exception to be thrown");
} catch (RuntimeException e) {
// Swallow the expected exception
}
assertThat("Metric is marked", ((Meter) metric).count(), is(1L));
}
@Test
public void anExceptionMeteredAnnotatedMethod_WithPublicScopeButNoExceptionThrown()
throws Exception {
final Metric metric =
registry
.allMetrics()
.get(new MetricName(InstrumentedWithExceptionMetered.class, "exceptionCounter"));
assertMetricIsSetup(metric);
assertThat("Metric intialises to zero", ((Meter) metric).count(), is(0L));
instance.explodeWithPublicScope(false);
assertThat(
"Metric should remain at zero if no exception is thrown", ((Meter) metric).count(), is(0L));
}
@Test
public void anExceptionMeteredAnnotatedMethodWithPublicScope() throws Exception {
final Metric metric =
registry
.allMetrics()
.get(new MetricName(InstrumentedWithExceptionMetered.class, "exceptionCounter"));
assertMetricIsSetup(metric);
assertThat("Metric intialises to zero", ((Meter) metric).count(), is(0L));
try {
instance.explodeWithPublicScope(true);
fail("Expected an exception to be thrown");
} catch (RuntimeException e) {
// Swallow the expected exception
}
assertThat("Metric is marked", ((Meter) metric).count(), is(1L));
}
@Test
public void anExceptionMeteredAnnotatedMethod_WithPublicScope_ButDifferentTypeOfException()
throws Exception {
final Metric metric =
registry
.allMetrics()
.get(new MetricName(InstrumentedWithExceptionMetered.class, "failures"));
assertMetricIsSetup(metric);
assertThat("Metric intialises to zero", ((Meter) metric).count(), is(0L));
try {
instance.errorProneMethod(new MyOtherException());
fail("Expected an exception to be thrown");
} catch (MyOtherException e) {
}
assertThat(
"Metric should not be marked if the exception is a different type",
((Meter) metric).count(),
is(0L));
}
@Test
public void anExceptionMeteredAnnotatedMethod_WithPublicScope_AndSubclassesOfSpecifiedException()
throws Exception {
final Metric metric =
registry
.allMetrics()
.get(new MetricName(InstrumentedWithExceptionMetered.class, "failures"));
assertMetricIsSetup(metric);
assertThat("Metric intialises to zero", ((Meter) metric).count(), is(0L));
try {
instance.errorProneMethod(new MySpecialisedException());
fail("Expected an exception to be thrown");
} catch (MyException e) {
}
assertThat(
"Metric should be marked when a subclass of the specified exception type is thrown",
((Meter) metric).count(),
is(1L));
}