How to resolve "Failed to configure a DataSource: 'url' attribute is not specified an-CodePudding

I am trying implement open-fiegn call from currrencyexchange module to currencyconversion but i am stuck at this error. Can anyone please help me with this. I have checked other answer and tried to add #spring.datasource.driver-class-name=com.mysql.jdbc.Driver but didn't work.

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-09-22 21:07:32.787 ERROR [currency-conversion-service,,] 261173 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
    If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
    If you have database settings to be loaded from a particular profile you may need to activate it (the profiles dev are currently active).

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>2.6.6</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.hashedin</groupId>
    <artifactId>currency-conversion-service</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>currency-conversion-service</name>
    <description>Currency Exchange Service template for HU SDE 22.3.2 Advanced Java track</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>2021.0.1</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-loadbalancer</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-openfeign -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>3.1.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-sleuth</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springdoc</groupId>
            <artifactId>springdoc-openapi-ui</artifactId>
            <version>1.6.11</version>
        </dependency>
        <dependency>
            <groupId>org.openapitools</groupId>
            <artifactId>jackson-databind-nullable</artifactId>
            <version>0.2.1</version>
        </dependency>
        <dependency>
            <groupId>io.swagger</groupId>
            <artifactId>swagger-annotations</artifactId>
            <version>1.6.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.persistence/javax.persistence-api -->
        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>javax.persistence-api</artifactId>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.7.3</version>
            </plugin>
        </plugins>
    </build>

</project>

application-properties

 spring.application.name=currency-conversion-service
    #spring.datasource.driver-class-name=com.mysql.jdbc.Driver
    spring.profiles.active=dev
    
server.port=8081
spring.cloud.config.enabled=false
eureka.client.serviceUrl.defaultZone=https://hu-22-java-adv-mastereureka-server-urtjok3rza-wl.a.run.app/eureka
eureka.instance.prefer-ip-address=true
eureka.instance.hostname=https://hu-22-java-adv-mastereureka-server-urtjok3rza-wl.a.run.app

eureka.client.register-with-eureka=true
eureka.client.fetch-registry=true

CodePudding user response：

If you want to use mysql you have to add mysql driver:

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

CodePudding user response：

The spring-boot-starter-data-jpa artifact can integrate with H2 embedded database. Add the following dependencies to your POM.xml:

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
    </dependency>

then, add two script files into the src/main/resources folder:

schema.sql for creating the database
data.sql for populating the database

Note that with spring data JPA you get a default configuration for embedded database. You do not need to add database configuration to the application.properties file.