| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.cassandra.metrics; |
| |
| import java.util.Collection; |
| import java.util.stream.Collectors; |
| |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| import com.codahale.metrics.Counter; |
| import com.codahale.metrics.Histogram; |
| import com.codahale.metrics.Snapshot; |
| import com.datastax.driver.core.QueryOptions; |
| import org.apache.cassandra.cql3.CQLTester; |
| import org.apache.cassandra.metrics.DecayingEstimatedHistogramReservoir.EstimatedHistogramReservoirSnapshot; |
| import org.apache.cassandra.metrics.DecayingEstimatedHistogramReservoir.Range; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| |
| import static org.assertj.core.api.Assertions.assertThat; |
| import static org.junit.Assert.assertEquals; |
| |
| /** |
| * Ensures we properly account for metrics tracked in the native protocol |
| */ |
| @RunWith(Parameterized.class) |
| public class ClientRequestSizeMetricsTest extends CQLTester |
| { |
| |
| @Parameterized.Parameter |
| public ProtocolVersion version; |
| |
| @Parameterized.Parameters() |
| public static Collection<Object[]> versions() |
| { |
| return ProtocolVersion.SUPPORTED.stream() |
| .map(v -> new Object[]{ v }) |
| .collect(Collectors.toList()); |
| } |
| |
| @BeforeClass |
| public static void setUp() |
| { |
| requireNetwork(); |
| } |
| |
| @Test |
| public void testReadAndWriteMetricsAreRecordedDuringNativeRequests() throws Throwable |
| { |
| // It may happen that the schema refreshment is done in the middle of the test which can pollute the results |
| // We explicitly disable scheme fetching to avoid that effect |
| try |
| { |
| reinitializeNetwork(builder -> builder.withQueryOptions(new QueryOptions().setMetadataEnabled(false))); |
| // We want to ignore all the messages sent by the driver upon connection as well as |
| // the event sent upon schema updates |
| clearMetrics(); |
| |
| executeNet(version, "SELECT * from system.peers"); |
| |
| long requestLength = ClientMessageSizeMetrics.bytesReceived.getCount(); |
| long responseLength = ClientMessageSizeMetrics.bytesSent.getCount(); |
| |
| assertThat(requestLength).isGreaterThan(0); |
| assertThat(responseLength).isGreaterThan(0); |
| |
| checkMetrics(1, requestLength, responseLength); |
| |
| // Let's fire the same request again and test that the changes are the same that previously |
| executeNet(version, "SELECT * from system.peers"); |
| |
| checkMetrics(2, requestLength, responseLength); |
| } |
| finally |
| { |
| reinitializeNetwork(); |
| } |
| } |
| |
| private void checkMetrics(int numberOfRequests, long requestLength, long responseLength) |
| { |
| Snapshot snapshot; |
| long expectedTotalBytesRead = numberOfRequests * requestLength; |
| assertEquals(expectedTotalBytesRead, ClientMessageSizeMetrics.bytesReceived.getCount()); |
| |
| long expectedTotalBytesWritten = numberOfRequests * responseLength; |
| assertEquals(expectedTotalBytesWritten, ClientMessageSizeMetrics.bytesSent.getCount()); |
| |
| // The request fit in one single frame so we know the new number of received frames |
| assertEquals(numberOfRequests, ClientMessageSizeMetrics.bytesReceivedPerRequest.getCount()); |
| |
| snapshot = ClientMessageSizeMetrics.bytesReceivedPerRequest.getSnapshot(); |
| assertMin(snapshot, requestLength); |
| assertMax(snapshot, requestLength); |
| |
| // The response fit in one single frame so we know the new number of received frames |
| assertEquals(numberOfRequests, ClientMessageSizeMetrics.bytesSentPerResponse.getCount()); |
| |
| snapshot = ClientMessageSizeMetrics.bytesSentPerResponse.getSnapshot(); |
| assertMin(snapshot, responseLength); |
| assertMax(snapshot, responseLength); |
| } |
| |
| private void assertMin(Snapshot snapshot, long value) |
| { |
| Range range = ((EstimatedHistogramReservoirSnapshot) snapshot).getBucketingRangeForValue(value); |
| assertEquals(snapshot.getMin(), range.min); |
| } |
| |
| private void assertMax(Snapshot snapshot, long value) |
| { |
| Range range = ((EstimatedHistogramReservoirSnapshot) snapshot).getBucketingRangeForValue(value); |
| assertEquals(snapshot.getMax(), range.max); |
| } |
| |
| private void clearMetrics() |
| { |
| clearCounter(ClientMessageSizeMetrics.bytesReceived); |
| clearCounter(ClientMessageSizeMetrics.bytesSent); |
| clearHistogram(ClientMessageSizeMetrics.bytesReceivedPerRequest); |
| clearHistogram(ClientMessageSizeMetrics.bytesSentPerResponse); |
| } |
| |
| private void clearCounter(Counter counter) |
| { |
| counter.dec(counter.getCount()); |
| } |
| |
| private void clearHistogram(Histogram histogram) |
| { |
| ((ClearableHistogram) histogram).clear(); |
| } |
| } |