creating schema with CommandLineRunner spring boot

Question

In my Spring Boot application, I'm using CommandLineRunner to create a new schema and them import some test data after that.

@Profile("create-schema")
@Component
public class CreateSchema {
    // creating schema inside. This works because I can see from the database
}

@Profile("import-data")
@Component
public class DataImporter {
}

and this is the sequence in application.properties

spring.profiles.active=${SPRING_PROFILE}, create-schema, import-data

And using this in application.properties

spring.jpa.properties.hibernate.default_schema=simba

Schema creation starts after the application has started; and after schema is created, import-data starts.

when import-data is running, I get an error that

relation schema_name.table_name does not exist

However, once the schema is created and I run the application again - it works. So, when I have to deploy my app where every time I have to create a schema to run some integration tests - it would fail there.

am I running something in wrong order?

Answer 1

Profiles are completely irrelevant here. You can ensure the schema is created before the data import by doing something like the following:

@Component("schemaCreator")
public class SchemaCreator {

    @PostConstruct
    public void initSchema(){

    }
}

Data Importer can be made dependent on the schema being initialised via the @DependsOn annotation.

https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/context/annotation/DependsOn.html

Beans on which the current bean depends. Any beans specified are guaranteed to be created by the container before this bean. Used infrequently in cases where a bean does not explicitly depend on another through properties or constructor arguments, but rather depends on the side effects of another bean's initialization.

@DependsOn("schemaCreator")
@Component
public class DataImporter {

    @PostConstruct
    public void initData(){

    }
}