BAEL-3340: Guide to FlexyPool (#13867)
* fix: correct log4j config * fix: correct antrun plugin config * feat: guide to flexypool See https://jira.baeldung.com/browse/BAEL-3340 * fix(lint): format project * fix(lint): format pom.xml * fix(lint): format pom.xml
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Chrys Exaucet
GitHub
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log4j.rootLogger=INFO, stdout
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log4j.rootLogger=INFO,stdout
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log4j.appender.stdout=org.apache.log4j.ConsoleAppender
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log4j.appender.stdout.layout=org.apache.log4j.SimpleLayout
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log4j.logger.org.datanucleus=DEBUG
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@ -115,6 +115,24 @@
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<artifactId>mysql</artifactId>
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<version>${testcontainers-version}</version>
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</dependency>
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<!-- flexypool -->
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<dependency>
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<groupId>com.vladmihalcea.flexy-pool</groupId>
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<artifactId>flexy-micrometer-metrics</artifactId>
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<version>${flexy-pool.version}</version>
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</dependency>
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<dependency>
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<groupId>com.vladmihalcea.flexy-pool</groupId>
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<artifactId>flexy-hikaricp</artifactId>
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<version>${flexy-pool.version}</version>
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<exclusions>
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<exclusion>
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<groupId>com.vladmihalcea.flexy-pool</groupId>
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<artifactId>flexy-dropwizard-metrics</artifactId>
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</exclusion>
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</exclusions>
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</dependency>
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<!-- Spring Core dependencies -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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@ -147,6 +165,7 @@
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<plugins>
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<!-- Reladomo -->
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-antrun-plugin</artifactId>
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<version>${maven-antrun-plugin.version}</version>
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<executions>
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@ -284,6 +303,7 @@
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<HikariCP.version>5.0.1</HikariCP.version>
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<ebean.version>13.15.2</ebean.version>
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<debezium.version>2.1.3.Final</debezium.version>
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<flexy-pool.version>2.2.3</flexy-pool.version>
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<testcontainers-version>1.17.6</testcontainers-version>
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</properties>
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package com.baeldung.libraries.flexypool;
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import com.vladmihalcea.flexypool.FlexyPoolDataSource;
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import com.vladmihalcea.flexypool.adaptor.HikariCPPoolAdapter;
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import com.vladmihalcea.flexypool.config.Configuration;
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import com.vladmihalcea.flexypool.connection.ConnectionDecoratorFactoryResolver;
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import com.vladmihalcea.flexypool.event.ConnectionAcquireTimeThresholdExceededEvent;
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import com.vladmihalcea.flexypool.event.ConnectionAcquireTimeoutEvent;
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import com.vladmihalcea.flexypool.event.ConnectionLeaseTimeThresholdExceededEvent;
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import com.vladmihalcea.flexypool.event.EventListener;
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import com.vladmihalcea.flexypool.metric.micrometer.MicrometerMetrics;
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import com.vladmihalcea.flexypool.strategy.IncrementPoolOnTimeoutConnectionAcquiringStrategy;
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import com.vladmihalcea.flexypool.strategy.RetryConnectionAcquiringStrategy;
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import com.vladmihalcea.flexypool.strategy.UniqueNamingStrategy;
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import com.zaxxer.hikari.HikariConfig;
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import com.zaxxer.hikari.HikariDataSource;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.context.annotation.Bean;
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import java.util.Arrays;
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import java.util.UUID;
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import java.util.concurrent.TimeUnit;
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@org.springframework.context.annotation.Configuration
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public class FlexypoolConfig {
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@SuppressWarnings("unchecked")
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@Bean(initMethod = "start", destroyMethod = "stop")
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public FlexyPoolDataSource<HikariDataSource> flexypoolDataSource() {
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Configuration<HikariDataSource> configuration = flexypoolConfiguration();
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return new FlexyPoolDataSource<>(configuration, new IncrementPoolOnTimeoutConnectionAcquiringStrategy.Factory<>(5), new RetryConnectionAcquiringStrategy.Factory<>(2));
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}
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@Bean
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public Configuration<HikariDataSource> flexypoolConfiguration() {
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HikariDataSource dataSource = hikariDataSource();
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return new Configuration.Builder<>(UUID.randomUUID().toString(), dataSource, HikariCPPoolAdapter.FACTORY).setMetricsFactory(MicrometerMetrics::new)
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.setConnectionProxyFactory(ConnectionDecoratorFactoryResolver.INSTANCE.resolve())
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.setMetricLogReporterMillis(TimeUnit.SECONDS.toMillis(5))
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.setMetricNamingUniqueName(UniqueNamingStrategy.INSTANCE)
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.setJmxEnabled(true)
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.setJmxAutoStart(true)
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.setConnectionAcquireTimeThresholdMillis(50L)
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.setConnectionLeaseTimeThresholdMillis(250L)
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.setEventListenerResolver(() -> Arrays.asList(new ConnectionAcquireTimeoutEventListener(), new ConnectionAcquireTimeThresholdExceededEventListener(), new ConnectionLeaseTimeThresholdExceededEventListener()))
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.build();
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}
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@Bean
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public HikariDataSource hikariDataSource() {
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HikariConfig config = new HikariConfig();
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config.setJdbcUrl("jdbc:h2:mem:test;DB_CLOSE_DELAY=-1;INIT=runscript from 'classpath:/db.sql'");
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config.setUsername("");
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config.setPassword("");
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config.addDataSourceProperty("cachePrepStmts", "true");
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config.addDataSourceProperty("prepStmtCacheSize", "250");
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config.addDataSourceProperty("prepStmtCacheSqlLimit", "2048");
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config.addDataSourceProperty("minimumPoolSize", "1");
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config.addDataSourceProperty("maximumPoolSize", "3");
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config.addDataSourceProperty("connectionTimeout", "1000");
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return new HikariDataSource(config);
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}
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}
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class ConnectionAcquireTimeThresholdExceededEventListener extends EventListener<ConnectionAcquireTimeThresholdExceededEvent> {
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public static final Logger LOGGER = LoggerFactory.getLogger(ConnectionAcquireTimeThresholdExceededEventListener.class);
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public ConnectionAcquireTimeThresholdExceededEventListener() {
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super(ConnectionAcquireTimeThresholdExceededEvent.class);
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}
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@Override
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public void on(ConnectionAcquireTimeThresholdExceededEvent event) {
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LOGGER.info("ConnectionAcquireTimeThresholdExceededEvent Caught event {}", event);
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}
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}
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class ConnectionLeaseTimeThresholdExceededEventListener extends EventListener<ConnectionLeaseTimeThresholdExceededEvent> {
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public static final Logger LOGGER = LoggerFactory.getLogger(ConnectionLeaseTimeThresholdExceededEventListener.class);
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public ConnectionLeaseTimeThresholdExceededEventListener() {
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super(ConnectionLeaseTimeThresholdExceededEvent.class);
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}
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@Override
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public void on(ConnectionLeaseTimeThresholdExceededEvent event) {
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LOGGER.info("ConnectionLeaseTimeThresholdExceededEvent Caught event {}", event);
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}
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}
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class ConnectionAcquireTimeoutEventListener extends EventListener<ConnectionAcquireTimeoutEvent> {
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public static final Logger LOGGER = LoggerFactory.getLogger(ConnectionAcquireTimeoutEventListener.class);
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public ConnectionAcquireTimeoutEventListener() {
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super(ConnectionAcquireTimeoutEvent.class);
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}
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@Override
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public void on(ConnectionAcquireTimeoutEvent event) {
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LOGGER.info("ConnectionAcquireTimeoutEvent Caught event {}", event);
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}
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}
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@ -0,0 +1,53 @@
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package com.baeldung.libraries.flexypool;
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import com.baeldung.libraries.hikaricp.Employee;
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import com.vladmihalcea.flexypool.FlexyPoolDataSource;
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import com.zaxxer.hikari.HikariDataSource;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.ArrayList;
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import java.util.List;
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@SpringBootApplication
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public class FlexypoolDemoApplication {
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private static FlexyPoolDataSource<HikariDataSource> poolDataSource;
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public FlexypoolDemoApplication(FlexyPoolDataSource<HikariDataSource> poolDataSource) {
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FlexypoolDemoApplication.poolDataSource = poolDataSource;
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}
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public static List<Employee> getEmployees() throws SQLException {
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String SQL_QUERY = "select * from emp";
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List<Employee> employees;
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try (Connection con = poolDataSource.getConnection(); PreparedStatement pst = con.prepareStatement(SQL_QUERY); ResultSet rs = pst.executeQuery();) {
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employees = new ArrayList<>();
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Employee employee;
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while (rs.next()) {
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employee = new Employee();
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employee.setEmpNo(rs.getInt("empno"));
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employee.setEname(rs.getString("ename"));
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employee.setJob(rs.getString("job"));
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employee.setMgr(rs.getInt("mgr"));
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employee.setHiredate(rs.getDate("hiredate"));
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employee.setSal(rs.getInt("sal"));
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employee.setComm(rs.getInt("comm"));
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employee.setDeptno(rs.getInt("deptno"));
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employees.add(employee);
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}
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}
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return employees;
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}
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public static void main(String[] args) throws SQLException {
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SpringApplication.run(FlexypoolDemoApplication.class, args);
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List<Employee> employees = getEmployees();
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System.out.println(employees);
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}
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}
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