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Emit a metric for number of local read and write calls
patch by Damien Stevenson; reviewed by Stefan Miklosovic and Brandon Williams for CASSANDRA-10023
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test/unit/org/apache/cassandra/metrics/ClientRequestMetricsTest.java
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| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.cassandra.metrics; | ||
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| import java.io.IOException; | ||
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| import org.junit.BeforeClass; | ||
| import org.junit.Test; | ||
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| import com.datastax.driver.core.BatchStatement; | ||
| import com.datastax.driver.core.BoundStatement; | ||
| import com.datastax.driver.core.Cluster; | ||
| import com.datastax.driver.core.PreparedStatement; | ||
| import com.datastax.driver.core.Session; | ||
| import org.apache.cassandra.SchemaLoader; | ||
| import org.apache.cassandra.config.DatabaseDescriptor; | ||
| import org.apache.cassandra.exceptions.ConfigurationException; | ||
| import org.apache.cassandra.schema.Schema; | ||
| import org.apache.cassandra.service.EmbeddedCassandraService; | ||
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| import static com.datastax.driver.core.Cluster.*; | ||
| import static org.junit.Assert.assertEquals; | ||
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| public class ClientRequestMetricsTest extends SchemaLoader | ||
| { | ||
| private static EmbeddedCassandraService cassandra; | ||
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| private static Cluster cluster; | ||
| private static Session session; | ||
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| private static String KEYSPACE = "junit"; | ||
| private static final String TABLE = "clientrequestsmetricstest"; | ||
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| private static PreparedStatement writePS; | ||
| private static PreparedStatement paxosPS; | ||
| private static PreparedStatement readPS; | ||
| private static PreparedStatement readRangePS; | ||
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| private static final ClientRequestMetrics readMetrics = ClientRequestsMetricsHolder.readMetrics; | ||
| private static final ClientWriteRequestMetrics writeMetrics = ClientRequestsMetricsHolder.writeMetrics; | ||
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| @BeforeClass | ||
| public static void setup() throws ConfigurationException, IOException | ||
| { | ||
| Schema.instance.clear(); | ||
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| cassandra = new EmbeddedCassandraService(); | ||
| cassandra.start(); | ||
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| cluster = builder().addContactPoint("127.0.0.1").withPort(DatabaseDescriptor.getNativeTransportPort()).build(); | ||
| session = cluster.connect(); | ||
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| session.execute("CREATE KEYSPACE IF NOT EXISTS " + KEYSPACE + " WITH replication = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };"); | ||
| session.execute("USE " + KEYSPACE); | ||
| session.execute("CREATE TABLE IF NOT EXISTS " + TABLE + " (id int, ord int, val text, PRIMARY KEY (id, ord));"); | ||
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| writePS = session.prepare("INSERT INTO " + KEYSPACE + '.' + TABLE + " (id, ord, val) VALUES (?, ?, ?);"); | ||
| paxosPS = session.prepare("INSERT INTO " + KEYSPACE + '.' + TABLE + " (id, ord, val) VALUES (?, ?, ?) IF NOT EXISTS;"); | ||
| readPS = session.prepare("SELECT * FROM " + KEYSPACE + '.' + TABLE + " WHERE id=?;"); | ||
| readRangePS = session.prepare("SELECT * FROM " + KEYSPACE + '.' + TABLE + " WHERE id=? AND ord>=? AND ord <= ?;"); | ||
| } | ||
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| @Test | ||
| public void testWriteStatement() | ||
| { | ||
| ClientRequestMetricsContainer writeMetricsContainer = new ClientRequestMetricsContainer(writeMetrics); | ||
| ClientRequestMetricsContainer readMetricsContainer = new ClientRequestMetricsContainer(readMetrics); | ||
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| executeWrite(1, 1, "aaaa"); | ||
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| assertEquals(1, writeMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, writeMetricsContainer.compareRemoteRequest()); | ||
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| assertEquals(0, readMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, readMetricsContainer.compareRemoteRequest()); | ||
| } | ||
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| @Test | ||
| public void testPaxosStatement() | ||
| { | ||
| ClientRequestMetricsContainer writeMetricsContainer = new ClientRequestMetricsContainer(writeMetrics); | ||
| ClientRequestMetricsContainer readMetricsContainer = new ClientRequestMetricsContainer(readMetrics); | ||
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| executePAXOS(2, 2, "aaaa"); | ||
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| assertEquals(1, readMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, readMetricsContainer.compareRemoteRequest()); | ||
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| assertEquals(1, writeMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, writeMetricsContainer.compareRemoteRequest()); | ||
| } | ||
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| @Test | ||
| public void testBatchStatement() | ||
| { | ||
| ClientRequestMetricsContainer writeMetricsContainer = new ClientRequestMetricsContainer(writeMetrics); | ||
| ClientRequestMetricsContainer readMetricsContainer = new ClientRequestMetricsContainer(readMetrics); | ||
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| executeBatch(10, 10); | ||
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| assertEquals(0, readMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, readMetricsContainer.compareRemoteRequest()); | ||
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| assertEquals(10, writeMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, writeMetricsContainer.compareRemoteRequest()); | ||
| } | ||
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| @Test | ||
| public void testReadStatement() | ||
| { | ||
| executeWrite(1, 1, "aaaa"); | ||
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| ClientRequestMetricsContainer writeMetricsContainer = new ClientRequestMetricsContainer(writeMetrics); | ||
| ClientRequestMetricsContainer readMetricsContainer = new ClientRequestMetricsContainer(readMetrics); | ||
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| executeRead(1); | ||
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| assertEquals(1, readMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, readMetricsContainer.compareRemoteRequest()); | ||
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| assertEquals(0, writeMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, writeMetricsContainer.compareRemoteRequest()); | ||
| } | ||
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| @Test | ||
| public void testRangeStatement() | ||
| { | ||
| executeBatch(1, 100); | ||
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| ClientRequestMetricsContainer writeMetricsContainer = new ClientRequestMetricsContainer(writeMetrics); | ||
| ClientRequestMetricsContainer readMetricsContainer = new ClientRequestMetricsContainer(readMetrics); | ||
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| executeSlice(1, 0, 99); | ||
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| assertEquals(1, readMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, readMetricsContainer.compareRemoteRequest()); | ||
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| assertEquals(0, writeMetricsContainer.compareLocalRequest()); | ||
| assertEquals(0, writeMetricsContainer.compareRemoteRequest()); | ||
| } | ||
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| private static class ClientRequestMetricsContainer | ||
| { | ||
| private ClientRequestMetrics metrics; | ||
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| private long localRequests; | ||
| private long remoteRequests; | ||
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| public ClientRequestMetricsContainer(ClientRequestMetrics clientRequestMetrics) | ||
| { | ||
| metrics = clientRequestMetrics; | ||
| localRequests = metrics.localRequests.getCount(); | ||
| remoteRequests = metrics.remoteRequests.getCount(); | ||
| } | ||
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| public long compareLocalRequest() | ||
| { | ||
| return metrics.localRequests.getCount() - localRequests; | ||
| } | ||
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| public long compareRemoteRequest() | ||
| { | ||
| return metrics.remoteRequests.getCount() - remoteRequests; | ||
| } | ||
| } | ||
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| private void executeWrite(int id, int ord, String val) | ||
| { | ||
| BoundStatement bs = writePS.bind(id, ord, val); | ||
| session.execute(bs); | ||
| } | ||
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| private void executePAXOS(int id, int ord, String val) | ||
| { | ||
| BoundStatement bs = paxosPS.bind(id, ord, val); | ||
| session.execute(bs); | ||
| } | ||
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| private void executeBatch(int distinctPartitions, int numClusteringKeys) | ||
| { | ||
| BatchStatement batch = new BatchStatement(); | ||
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| for (int i = 0; i < distinctPartitions; i++) | ||
| { | ||
| for (int y = 0; y < numClusteringKeys; y++) | ||
| { | ||
| batch.add(writePS.bind(i, y, "aaaaaaaa")); | ||
| } | ||
| } | ||
| session.execute(batch); | ||
| } | ||
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| private void executeRead(int id) | ||
| { | ||
| BoundStatement bs = readPS.bind(id); | ||
| session.execute(bs); | ||
| } | ||
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| private void executeSlice(int id, int start_range, int end_range) | ||
| { | ||
| BoundStatement bs = readRangePS.bind(id, start_range, end_range); | ||
| session.execute(bs); | ||
| } | ||
| } |