Configuring with SpringBoot and Postgres

Camunda 7 Topics Discussion & Questions
1

I am getting this error:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: org.postgresql.Driver 
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) ~[spring-beans-5.1.10.RELEASE.jar:5.1.10.RELEASE]

application.properties:

logging.level.org.springframework=ERROR

spring.jpa.hibernate.ddl-auto=none


spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=none

spring.jpa.hibernate.show-sql=true
spring.datasource.initialization-mode=always
spring.datasource.platform=postgres
spring.datasource.url=jdbc:postgresql://localhost:5432/Workflow
spring.datasource.username=postgres
spring.datasource.password=adminadmin
spring.datasource.driverClassName=org.postgresql.Driver 


spring.datasource.initialization-mode=always
spring.datasource.initialize=true
spring.datasource.schema=classpath:/schema.sql
spring.datasource.continue-on-error=true
spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults=false

spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQL9Dialect
spring.jpa.hibernate.ddl-auto = update

And I have this:
@Bean(name=“camundaBpmDataSource”)
@ConfigurationProperties(prefix=“datasource.primary”)
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}

2

Hi @lenny_h,

Have you included spring-boot-starter-jdbc as a dependency in your pom.xml file?

Best,
Nikola

3

Yes, here is my 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>2.1.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>demospringYT</name>
    <description>Demo project for Spring Boot</description>
 

<properties>
  <camunda.version>7.11.0</camunda.version>
   <java.version>1.8</java.version>
</properties>

<dependencyManagement>
  <dependencies>
    <dependency>
      <!-- Import dependency management from camunda -->
      <groupId>org.camunda.bpm</groupId>
      <artifactId>camunda-bom</artifactId>
      <version>${camunda.version}</version>
      <scope>import</scope>
      <type>pom</type>
    </dependency>
  </dependencies>
</dependencyManagement>

    <dependencies>
            
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <!-- PostgreSQL -->
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>

            <version>42.2.8</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.camunda.bpm.springboot</groupId>
            <artifactId>camunda-bpm-spring-boot-starter-rest</artifactId>
            <version>3.3.5</version>
        </dependency>
 
<!--        <dependency>
            <groupId>org.camunda.bpm.springboot</groupId>
            <artifactId>camunda-bpm-spring-boot-starter</artifactId>
            <version>3.3.5</version>
        </dependency>-->
    </dependencies>

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

</project>
4

@lenny_h You can do a simple test in your project to make sure class “org.postgresql.Driver” is on your classpath

try {
  Class.forName("org.postgresql.Driver");
  //on classpath
} catch(ClassNotFoundException e) {
  // not on classpath
}
5

the above prefix is not present in the yaml properties depicted in the question.