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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.jdisc.metric;
import com.yahoo.container.di.componentgraph.Provider;
import com.yahoo.jdisc.Metric;
import com.yahoo.jdisc.application.MetricConsumer;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
/**
* @author Simon Thoresen Hult
*/
public class MetricProviderTest {
@Test
void requireThatMetricProviderDelegatesToConsumerFactory() {
MetricConsumer consumer = Mockito.mock(MetricConsumer.class);
MetricProvider provider = MetricProviders.newInstance(consumer);
Metric metric = provider.get();
assertNotNull(metric);
Metric.Context fooCtx = Mockito.mock(Metric.Context.class);
metric.add("foo", 6, fooCtx);
metric.set("foo", 9, fooCtx);
Mockito.verify(consumer, Mockito.times(1)).add("foo", 6, fooCtx);
Mockito.verify(consumer, Mockito.times(1)).set("foo", 9, fooCtx);
}
@Test
void requireThatThreadLocalConsumersAreProvided() throws Exception {
AtomicInteger cnt = new AtomicInteger(0);
final MetricProvider metricProvider = MetricProviders.newInstance(MetricConsumerFactories.newCounter(cnt));
assertEquals(0, cnt.get());
metricProvider.get().add("foo", 6, null); // need to call on Metric to instantiate MetricConsumer
assertEquals(1, cnt.get());
metricProvider.get().add("bar", 9, null);
assertEquals(1, cnt.get());
ExecutorService executor = Executors.newSingleThreadExecutor();
assertTrue(executor.submit(new MetricTask(metricProvider)).get(60, TimeUnit.SECONDS));
assertEquals(2, cnt.get());
assertTrue(executor.submit(new MetricTask(metricProvider)).get(60, TimeUnit.SECONDS));
assertEquals(2, cnt.get());
}
private static class MetricTask implements Callable<Boolean> {
final Provider<Metric> provider;
MetricTask(Provider<Metric> provider) {
this.provider = provider;
}
@Override
public Boolean call() throws Exception {
provider.get().add("foo", 69, null);
return true;
}
}
}
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