H2 console Spring Boot not opening

user_10103160 0
Viewed 7701

I have very simple project POM:

<?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
         https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <packaging>jar</packaging>
    <groupId>com.example</groupId>
    <artifactId>managing-transactions</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>managing-transactions</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>compile</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

in appliation.properties i have tried different variants

#spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.url=jdbc:h2:mem:test;DB_CLOSE_DELAY=-1
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.h2.console.enabled=true
spring.h2.console.path=/h2-console

but console do not open on http://localhost:8080/h2-console

Only way it work is with old way

Runnable runServer = new Runnable() {
    @Override
    public void run() {
        try {
            Server.startWebServer(DriverManager.getConnection("jdbc:h2:mem:test;DB_CLOSE_DELAY=-1", "sa", ""));
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
};
Thread threadServer = new Thread(runServer);
threadServer.start();
spring-boot h2
2 Answers

This does not appear to be a problem specific to H2 configuration. When I tried using the same Maven dependencies, I saw that the Application started and stopped.

To view the H2 console within your own Spring Boot project, the Spring embedded Web Server needs to be running - this is to make the "h2-console" url to work.

So instead of using the JDBC project alone:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>

Use the starter-web project, with a simple Controller.

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

Or add the Spring Dev tools dependency to your code. That will keep the server running continuously, and the H2 console URL will work.

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <optional>true</optional>
</dependency>

Here is the link to the full source code. https://github.com/shankarps/H2Project

If you do not want to run web-starter project you can also use Spring Dev tools.

Here is an article that has more details - https://medium.com/@harittweets/how-to-connect-to-h2-database-during-development-testing-using-spring-boot-44bbb287570

user_63521600

you can also my pom.xml, which is built and run in Java 11.

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>org.remad</groupId>
    <artifactId>JPAStarter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>JPAStarter</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.properties

###############################################################################
# Spring database source config
###############################################################################
spring.datasource.url=jdbc:h2:file:/tmp/JpaStarter/db
#spring.datasource.username=sa
#spring.datasource.password=password
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.datasource.driverClassName=org.h2.Driver

###############################################################################
# Hibernate Configuration
###############################################################################
spring.jpa.hbernate.ddl-auto = update

###############################################################################
# Debug configuration
###############################################################################
spring.h2.console.enabled=true
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true

Hope this helps :-)

user_76837010
Related