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BAEL-2102 - Configure a Tomcat Connection Pool in Spring Boot (#5095) 

* Initial Commit

* Initial Commit

* Initial Commit

* Update CommandLineCrudRunner.java

* Update pom.xml

* Update Customer.java

* Update application.properties

* Update pom.xml

* Update SpringBootConsoleApplication.java

* Update SpringBootConsoleApplication.java

* Update SpringBootConsoleApplication.java

* Update CommandLineCrudRunner.java

* Update pom.xml
This commit is contained in:
Alejandro Gervasio 2018-08-30 22:31:26 -03:00 committed by KevinGilmore
parent 3824590375
commit d7edc9a7c2
7 changed files with 235 additions and 57 deletions
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128
spring-boot-persistence/pom.xml
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@ -1,57 +1,75 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>spring-boot-persistence</artifactId>
<version>0.1.0</version>
<parent>
<artifactId>parent-boot-2</artifactId>
<groupId>com.baeldung</groupId>
<artifactId>spring-boot-persistence</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-boot-persistence</name>
<description>This is a simple Spring Data Repositories test</description>
<parent>
<artifactId>parent-boot-2</artifactId>
<groupId>com.baeldung</groupId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-boot-2</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
</dependencies>
<build>
<finalName>spring-boot-persistence</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
</plugin>
<plugin>
<groupId>pl.project13.maven</groupId>
<artifactId>git-commit-id-plugin</artifactId>
<version>${git-commit-id-plugin.version}</version>
</plugin>
</plugins>
</build>
<properties>
<git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
</properties>
</project>
<relativePath>../parent-boot-2</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<exclusions>
<exclusion>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
<version>${tomcat-jdbc.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector-java.version}</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>${h2database.version}</version>
<scope>runtime</scope>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
<mysql-connector-java.version>8.0.12</mysql-connector-java.version>
<tomcat-jdbc.version>9.0.10</tomcat-jdbc.version>
<h2database.version>1.4.197</h2database.version>
</properties>
<build>
<finalName>spring-boot-persistence</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

22
spring-boot-persistence/src/main/java/com/baeldung/tomcatconnectionpool/application/SpringBootConsoleApplication.java Normal file
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package com.baeldung.tomcatconnectionpool.application;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@SpringBootApplication
@EnableAutoConfiguration
@ComponentScan(basePackages={"com.baeldung.tomcatconnectionpool.application"})
@EnableJpaRepositories(basePackages="com.baeldung.tomcatconnectionpool.application.repositories")
@EnableTransactionManagement
@EntityScan(basePackages="com.baeldung.tomcatconnectionpool.application.entities")
public class SpringBootConsoleApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootConsoleApplication.class);
}
}

53
spring-boot-persistence/src/main/java/com/baeldung/tomcatconnectionpool/application/entities/Customer.java Normal file
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package com.baeldung.tomcatconnectionpool.application.entities;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "customers")
public class Customer {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@Column(name = "first_name")
private String firstName;
@Column(name = "last_name")
private String lastName;
public Customer() {}
public Customer(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
public long getId() {
return id;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
@Override
public String toString() {
return "Customer{" + "id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + '}';
}
}

12
spring-boot-persistence/src/main/java/com/baeldung/tomcatconnectionpool/application/repositories/CustomerRepository.java Normal file
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package com.baeldung.tomcatconnectionpool.application.repositories;
import com.baeldung.tomcatconnectionpool.application.entities.Customer;
import java.util.List;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface CustomerRepository extends CrudRepository<Customer, Long> {
List<Customer> findByLastName(String lastName);
}

37
spring-boot-persistence/src/main/java/com/baeldung/tomcatconnectionpool/application/runners/CommandLineCrudRunner.java Normal file
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package com.baeldung.tomcatconnectionpool.application.runners;
import com.baeldung.tomcatconnectionpool.application.entities.Customer;
import com.baeldung.tomcatconnectionpool.application.repositories.CustomerRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
@Component
public class CommandLineCrudRunner implements CommandLineRunner {
private static final Logger logger = LoggerFactory.getLogger(CommandLineCrudRunner.class);
@Autowired
private CustomerRepository customerRepository;
@Override
public void run(String... args) throws Exception {
customerRepository.save(new Customer("John", "Doe"));
customerRepository.save(new Customer("Jennifer", "Wilson"));
logger.info("Customers found with findAll():");
customerRepository.findAll().forEach(c -> logger.info(c.toString()));
logger.info("Customer found with findById(1L):");
Customer customer = customerRepository.findById(1L)
.orElseGet(() -> new Customer("Non-existing customer", ""));
logger.info(customer.toString());
logger.info("Customer found with findByLastName('Wilson'):");
customerRepository.findByLastName("Wilson").forEach(c -> {
logger.info(c.toString());
});
}
}

18
spring-boot-persistence/src/main/resources/application.properties
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@ -1,2 +1,16 @@
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=none
spring.datasource.tomcat.initial-size=15
spring.datasource.tomcat.max-wait=20000
spring.datasource.tomcat.max-active=50
spring.datasource.tomcat.max-idle=15
spring.datasource.tomcat.min-idle=8
spring.datasource.tomcat.default-auto-commit=true
spring.datasource.url=jdbc:h2:mem:test
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=org.h2.Driver
spring.jpa.show-sql=false
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.H2Dialect
spring.jpa.properties.hibernate.id.new_generator_mappings=false

22
spring-boot-persistence/src/test/java/com/baeldung/tomcatconnectionpool/test/application/SpringBootTomcatConnectionPoolIntegrationTest.java Normal file
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package com.baeldung.tomcatconnectionpool.test.application;
import javax.sql.DataSource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.junit4.SpringRunner;
import static org.assertj.core.api.Assertions.*;
import org.springframework.boot.test.context.SpringBootTest;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBootTomcatConnectionPoolIntegrationTest {
@Autowired
private DataSource dataSource;
@Test
public void givenTomcatConnectionPoolInstance_whenCheckedPoolClassName_thenCorrect() {
assertThat(dataSource.getClass().getName()).isEqualTo("org.apache.tomcat.jdbc.pool.DataSource");
}
}