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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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package org.apache.cassandra.metrics;
import java.io.IOException;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.PreparedStatement;
import com.datastax.driver.core.Session;
import org.apache.cassandra.OrderedJUnit4ClassRunner;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.cql3.QueryProcessor;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.service.EmbeddedCassandraService;
import static junit.framework.Assert.assertEquals;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(OrderedJUnit4ClassRunner.class)
public class CQLMetricsTest extends SchemaLoader
{
private static EmbeddedCassandraService cassandra;
private static Cluster cluster;
private static Session session;
private static PreparedStatement metricsStatement;
@BeforeClass()
public static void setup() throws ConfigurationException, IOException
{
Schema.instance.clear();
cassandra = new EmbeddedCassandraService();
cassandra.start();
cluster = Cluster.builder().addContactPoint("127.0.0.1").withPort(DatabaseDescriptor.getNativeTransportPort()).build();
session = cluster.connect();
session.execute("CREATE KEYSPACE IF NOT EXISTS junit WITH replication = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };");
session.execute("CREATE TABLE IF NOT EXISTS junit.metricstest (id int PRIMARY KEY, val text);");
}
@Test
public void testPreparedStatementsCount()
{
assertEquals(0, (int) QueryProcessor.metrics.preparedStatementsCount.value());
metricsStatement = session.prepare("INSERT INTO junit.metricstest (id, val) VALUES (?, ?)");
assertEquals(1, (int) QueryProcessor.metrics.preparedStatementsCount.value());
}
@Test
public void testRegularStatementsExecuted()
{
clearMetrics();
assertEquals(0, QueryProcessor.metrics.preparedStatementsExecuted.count());
assertEquals(0, QueryProcessor.metrics.regularStatementsExecuted.count());
for (int i = 0; i < 10; i++)
session.execute(String.format("INSERT INTO junit.metricstest (id, val) VALUES (%d, '%s')", i, "val" + i));
assertEquals(0, QueryProcessor.metrics.preparedStatementsExecuted.count());
assertEquals(10, QueryProcessor.metrics.regularStatementsExecuted.count());
}
@Test
public void testPreparedStatementsExecuted()
{
clearMetrics();
assertEquals(0, QueryProcessor.metrics.preparedStatementsExecuted.count());
assertEquals(0, QueryProcessor.metrics.regularStatementsExecuted.count());
for (int i = 0; i < 10; i++)
session.execute(metricsStatement.bind(i, "val" + i));
assertEquals(10, QueryProcessor.metrics.preparedStatementsExecuted.count());
assertEquals(0, QueryProcessor.metrics.regularStatementsExecuted.count());
}
@Test
public void testPreparedStatementsRatio()
{
clearMetrics();
assertEquals(Double.NaN, QueryProcessor.metrics.preparedStatementsRatio.value());
for (int i = 0; i < 10; i++)
session.execute(metricsStatement.bind(i, "val" + i));
assertEquals(1.0, QueryProcessor.metrics.preparedStatementsRatio.value());
for (int i = 0; i < 10; i++)
session.execute(String.format("INSERT INTO junit.metricstest (id, val) VALUES (%d, '%s')", i, "val" + i));
assertEquals(0.5, QueryProcessor.metrics.preparedStatementsRatio.value());
}
private void clearMetrics()
{
QueryProcessor.metrics.preparedStatementsExecuted.clear();
QueryProcessor.metrics.regularStatementsExecuted.clear();
QueryProcessor.metrics.preparedStatementsEvicted.clear();
}
}