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Spring Data Cassandra tutorial - containing branches with different topics that are used within my blog posts

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The using_entities_the_cassandra_way doesn't actually compile

The code in the using_entities_the_cassandra_way branch doesn't actually compile with Maven due to missing dependencies. Could you please fix this? Thanks! :)

Inherit version from Spring Boot's dependency management

Dependencies managed by Spring Boot are not required to specify a version number. In fact, that can cause issues because other Spring Data dependencies are managed too and can cause compatibility issues.

spring-data-cassandra/pom.xml

Line 38 in 13f6e71

multiple Keyspaces not working with different package structure

Hello,

First of all, I waned to say thank you for the blog post and his project.

Even 3 years after its creation, the content is still very relevant. Many thanks.

I am working on a similar problem, where we need to use a Spring Boot 2.4.0 reactive WebFlux + Reactive Cassandra on two difference keyspaces.

We managed to come up with a solution where we have three config files, one abstract, and two for each keyspace, very similar to what you are doing.

Then, we have two repository classes, where all the queries are written with the @query annotation, and we write the keysapce name hardcoded there.

This solution is working, but it is rather ugly. This is why I went to look at your blog post.

Your solution is quite elegant!

However, as soon as we change the package structure: I put
CassandraConfig
KeyspaceACassandraConfig
KeyspaceBCassandraConfig

Under package config.

KeyspaceAPersonRepository
KeyspaceBPersonRepository
PersonRepository
Under package repository

(Which is really a default and most common packaging structure for Spring), it is not working anymore.
It is always defaulting to keyspace A.

May I ask what is the issue? Can this solution ou propose, which is very elegant, be package agnostic?

Thank you

Consider using Spring Boot's auto configuration

Wide parts of the config are already provided by Spring Boot (contact points, schema actions, enabling reactive repositories). The only feature not provided by Boot is setup/drop of keyspaces. Maybe you want to outline that particular aspect to explain why that is – btw. filing a Boot ticket to customize keyspace creation/drop is never a bad idea 😸

spring-data-cassandra/src/main/java/com/lankydan/cassandra/CassandraConfig.java

Lines 14 to 69 in 13f6e71

    
           @Configuration 
        
           @EnableReactiveCassandraRepositories 
        
           public class CassandraConfig extends AbstractReactiveCassandraConfiguration { 
        
             @Value("${cassandra.contactpoints}") 
        
             private String contactPoints; 
        
             @Value("${cassandra.port}") 
        
             private int port; 
        
             @Value("${cassandra.keyspace}") 
        
             private String keyspace; 
        
             @Value("${cassandra.basepackages}") 
        
             private String basePackages; 
        
             @Override 
        
             protected String getKeyspaceName() { 
        
               return keyspace; 
        
             } 
        
             @Override 
        
             protected String getContactPoints() { 
        
               return contactPoints; 
        
             } 
        
             @Override 
        
             protected int getPort() { 
        
               return port; 
        
             } 
        
             @Override 
        
             public SchemaAction getSchemaAction() { 
        
               return SchemaAction.CREATE_IF_NOT_EXISTS; 
        
             } 
        
             @Override 
        
             public String[] getEntityBasePackages() { 
        
               return new String[] {basePackages}; 
        
             } 
        
             @Override 
        
             protected List<CreateKeyspaceSpecification> getKeyspaceCreations() { 
        
               final CreateKeyspaceSpecification specification = 
        
                   CreateKeyspaceSpecification.createKeyspace(keyspace) 
        
                       .ifNotExists() 
        
                       .with(KeyspaceOption.DURABLE_WRITES, true) 
        
                       .withSimpleReplication(); 
        
               return List.of(specification); 
        
             } 
        
             @Override 
        
             protected List<DropKeyspaceSpecification> getKeyspaceDrops() { 
        
               return List.of(DropKeyspaceSpecification.dropKeyspace(keyspace)); 
        
             } 
        
           }

lankydan / spring-data-cassandra Goto Github PK

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spring-data-cassandra's Issues

The using_entities_the_cassandra_way doesn't actually compile

Inherit version from Spring Boot's dependency management

multiple Keyspaces not working with different package structure

Consider using Spring Boot's auto configuration

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	@Configuration
	@EnableReactiveCassandraRepositories
	public class CassandraConfig extends AbstractReactiveCassandraConfiguration {

	@Value("${cassandra.contactpoints}")
	private String contactPoints;

	@Value("${cassandra.port}")
	private int port;

	@Value("${cassandra.keyspace}")
	private String keyspace;

	@Value("${cassandra.basepackages}")
	private String basePackages;

	@Override
	protected String getKeyspaceName() {
	return keyspace;
	}

	@Override
	protected String getContactPoints() {
	return contactPoints;
	}

	@Override
	protected int getPort() {
	return port;
	}

	@Override
	public SchemaAction getSchemaAction() {
	return SchemaAction.CREATE_IF_NOT_EXISTS;
	}

	@Override
	public String[] getEntityBasePackages() {
	return new String[] {basePackages};
	}

	@Override
	protected List<CreateKeyspaceSpecification> getKeyspaceCreations() {
	final CreateKeyspaceSpecification specification =
	CreateKeyspaceSpecification.createKeyspace(keyspace)
	.ifNotExists()
	.with(KeyspaceOption.DURABLE_WRITES, true)
	.withSimpleReplication();
	return List.of(specification);
	}

	@Override
	protected List<DropKeyspaceSpecification> getKeyspaceDrops() {
	return List.of(DropKeyspaceSpecification.dropKeyspace(keyspace));
	}
	}