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Add integration test for PostgreSQL metrics
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169 changes: 169 additions & 0 deletions
169
...ava/io/micrometer/core/instrument/binder/db/PostgreSQLDatabaseMetricsIntegrationTest.java
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| /** | ||
| * Copyright 2019 VMware, Inc. | ||
| * <p> | ||
| * Licensed 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 | ||
| * <p> | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * <p> | ||
| * 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 io.micrometer.core.instrument.binder.db; | ||
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| import io.micrometer.core.instrument.MeterRegistry; | ||
| import io.micrometer.core.instrument.Tags; | ||
| import io.micrometer.core.instrument.search.RequiredSearch; | ||
| import io.micrometer.core.instrument.simple.SimpleMeterRegistry; | ||
| import org.junit.jupiter.api.BeforeEach; | ||
| import org.junit.jupiter.api.Tag; | ||
| import org.junit.jupiter.api.Test; | ||
| import org.postgresql.ds.PGSimpleDataSource; | ||
| import org.testcontainers.containers.PostgreSQLContainer; | ||
| import org.testcontainers.junit.jupiter.Container; | ||
| import org.testcontainers.junit.jupiter.Testcontainers; | ||
| import org.testcontainers.utility.DockerImageName; | ||
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|
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| import javax.sql.DataSource; | ||
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| import java.sql.Connection; | ||
| import java.sql.PreparedStatement; | ||
| import java.sql.SQLException; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
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| import static org.assertj.core.api.Assertions.*; | ||
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| import static io.micrometer.core.instrument.binder.db.PostgreSQLDatabaseMetrics.Names.*; | ||
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| /** | ||
| * @author Markus Dobel | ||
| */ | ||
| @Testcontainers | ||
| @Tag("docker") | ||
| public class PostgreSQLDatabaseMetricsIntegrationTest { | ||
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| @Container | ||
| private final PostgreSQLContainer<?> postgres = new PostgreSQLContainer<>(getDockerImageName()); | ||
| private final MeterRegistry registry = new SimpleMeterRegistry(); | ||
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| private DataSource dataSource; | ||
| private Tags tags; | ||
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| // statistics are updated only every PGSTAT_STAT_INTERVAL, which is 500ms. Add a bit for stable tests. | ||
| private static final long PGSTAT_STAT_INTERVAL = 500L + 50L; | ||
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| @BeforeEach | ||
| void setup() throws InterruptedException { | ||
| dataSource = createDatasource(); | ||
| tags = Tags.of("database", postgres.getDatabaseName()); | ||
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| new PostgreSQLDatabaseMetrics(dataSource, postgres.getDatabaseName()).bindTo(registry); | ||
| } | ||
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| @Test | ||
| void gaugesAreNotZero() throws Exception { | ||
| /* create noise to increment gauges */ | ||
| executeSql( | ||
| "CREATE TABLE gauge_test_table (val varchar(255))", | ||
| "INSERT INTO gauge_test_table (val) VALUES ('foo')", | ||
| "UPDATE gauge_test_table SET val = 'bar'", | ||
| "SELECT * FROM gauge_test_table", | ||
| "DELETE FROM gauge_test_table" | ||
| ); | ||
| Thread.sleep(PGSTAT_STAT_INTERVAL); | ||
|
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| final List<String> GAUGES = Arrays.asList( | ||
| SIZE, CONNECTIONS, ROWS_DEAD, LOCKS | ||
| ); | ||
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| for (String name: GAUGES) { | ||
| assertThat(get(name).gauge().value()) | ||
| .withFailMessage("Gauge " + name + " is zero.") | ||
| .isGreaterThan(0); | ||
| } | ||
| } | ||
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| @Test | ||
| void countersAreNotZero() throws Exception { | ||
| /* create noise to increment counters */ | ||
| executeSql( | ||
| "CREATE TABLE counter_test_table (val varchar(255))", | ||
| "INSERT INTO counter_test_table (val) VALUES ('foo')", | ||
| "UPDATE counter_test_table SET val = 'bar'", | ||
| "SELECT * FROM counter_test_table", | ||
| "DELETE FROM counter_test_table" | ||
| ); | ||
| Thread.sleep(PGSTAT_STAT_INTERVAL); | ||
|
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| final List<String> COUNTERS = Arrays.asList( | ||
| BLOCKS_HITS, BLOCKS_READS, | ||
| TRANSACTIONS, | ||
| ROWS_FETCHED, ROWS_INSERTED, ROWS_UPDATED, ROWS_DELETED, | ||
| BUFFERS_CHECKPOINT | ||
| ); | ||
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| /* the following counters are zero on a clean database and hard to increase reliably */ | ||
| final List<String> ZERO_COUNTERS = Arrays.asList( | ||
| TEMP_WRITES, | ||
| CHECKPOINTS_TIMED, CHECKPOINTS_REQUESTED, | ||
| BUFFERS_CLEAN, BUFFERS_BACKEND | ||
| ); | ||
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| for (String name: COUNTERS) { | ||
| assertThat(get(name).functionCounter().count()) | ||
| .withFailMessage("Counter " + name + " is zero.") | ||
| .isGreaterThan(0); | ||
| } | ||
| } | ||
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| @Test | ||
| void deadTuplesGaugeIncreases() throws Exception { | ||
| final double deadRowsBefore = get(ROWS_DEAD).gauge().value(); | ||
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| executeSql( | ||
| "CREATE TABLE dead_tuples_test_table (val varchar(255))", | ||
| "INSERT INTO dead_tuples_test_table (val) VALUES ('foo')", | ||
| "UPDATE dead_tuples_test_table SET val = 'bar'" | ||
| ); | ||
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| // wait for stats to be updated | ||
| Thread.sleep(PGSTAT_STAT_INTERVAL); | ||
| assertThat(get(ROWS_DEAD).gauge().value()).isGreaterThan(deadRowsBefore); | ||
| } | ||
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| private DataSource createDatasource() { | ||
| final PGSimpleDataSource result = new PGSimpleDataSource(); | ||
| result.setURL(postgres.getJdbcUrl()); | ||
| result.setUser(postgres.getUsername()); | ||
| result.setPassword(postgres.getPassword()); | ||
| result.setDatabaseName(postgres.getDatabaseName()); | ||
| return result; | ||
| } | ||
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| private void executeSql(String ... statements) throws SQLException { | ||
| try (final Connection connection = dataSource.getConnection()) { | ||
| executeSql(connection, statements); | ||
| } | ||
| } | ||
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| private void executeSql(Connection connection, String ... statements) throws SQLException { | ||
| for (String sql: statements) { | ||
| try (final PreparedStatement stmt = connection.prepareStatement(sql)) { | ||
| stmt.execute(); | ||
| } | ||
| } | ||
| } | ||
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| private RequiredSearch get(final String name) { | ||
| return registry.get(name).tags(tags); | ||
| } | ||
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| private static DockerImageName getDockerImageName() { | ||
| return DockerImageName.parse("postgres:9.6.21"); | ||
| } | ||
| } |
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