Spring Data R2DBC with MySQL via jasync-sql

HelloMySQL.java

/*
 * Copyright 2019 the original author or authors.
 *
 * 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
 *
 *      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.
 */

import io.r2dbc.spi.ConnectionFactory;

import java.nio.charset.StandardCharsets;

import com.github.jasync.r2dbc.mysql.JasyncConnectionFactory;
import com.github.jasync.sql.db.Configuration;
import com.github.jasync.sql.db.mysql.pool.MySQLConnectionFactory;
import com.github.jasync.sql.db.mysql.util.URLParser;
import reactor.test.StepVerifier;

import org.springframework.data.r2dbc.function.DatabaseClient;

/**
 * @author Mark Paluch
 */
public class HelloMySQL {

	public static void main(String[] args) {

		Configuration configuration = URLParser.INSTANCE.parseOrDie("mysql://root:my-secret-pw@localhost:3306/mysql", StandardCharsets.UTF_8);

		ConnectionFactory connectionFactory = new JasyncConnectionFactory(new MySQLConnectionFactory(configuration));

		DatabaseClient client = DatabaseClient.create(connectionFactory);

		client.execute()
				.sql("SELECT * FROM help_topic ORDER BY name")
				.fetch()
				.all()
				.collectList()
				.doOnNext(it -> System.out
						.println("Retrieved number of help topics: " + it.size()))
				.as(StepVerifier::create)
				.expectNextCount(1)
				.verifyComplete();
	}
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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>

	<groupId>com.examle</groupId>
	<artifactId>spring-data-r2dbc-mysql-jasync</artifactId>
	<version>1.0-SNAPSHOT</version>

	<properties>
		<maven.compiler.source>1.8</maven.compiler.source>
		<maven.compiler.target>1.8</maven.compiler.target>
	</properties>

	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>io.r2dbc</groupId>
				<artifactId>r2dbc-bom</artifactId>
				<version>Arabba-M7</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<dependencies>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-r2dbc</artifactId>
			<version>1.0.0.gh-75-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>com.github.jasync-sql</groupId>
			<artifactId>jasync-r2dbc-mysql</artifactId>
			<version>0.9.32</version>
		</dependency>
		<dependency>
			<groupId>io.projectreactor</groupId>
			<artifactId>reactor-test</artifactId>
			<version>3.2.6.RELEASE</version>
		</dependency>
	</dependencies>

	<repositories>
		<repository>
			<id>spring-libs-snapshot</id>
			<url>https://repo.spring.io/libs-snapshot</url>
		</repository>
		<repository>
			<id>jcenter</id>
			<url>https://jcenter.bintray.com/</url>
		</repository>
	</repositories>

</project>

is this using Connection pool or just making connection when call this api?