How do I configure consistency level with Spring Boot and AWS Keyspaces? - spring-boot

Question

I hope you can help me, I am doing a crud with spring boot and keyspaces (cassandra aws), spring has the default level of Consistency level in ONE and I have not been able to write the data since I get the following error:
"message": "Query; CQL [INSERT INTO tabledemoach (address,ciiu,creation_date,email,id,name,phone,state,user_activation_status) VALUES (?,?,?,?,?,?,?,?,?)]; Consistency level LOCAL_ONE is not supported for this operation. Supported consistency levels are: LOCAL_QUORUM; nested exception is com.datastax.oss.driver.api.core.servererrors.InvalidQueryException: Consistency level LOCAL_ONE is not supported for this operation. Supported consistency levels are: LOCAL_QUORUM",
I don't know how to configure the consistency level, I have tried several solutions on the internet and none have worked for me.
i have the following code
#Configuration
#EnableCassandraRepositories(basePackages = "com.demo")
public class AppConfig {
private final static String KEYSPACE = "demo";
#Primary
public #Bean CqlSession session() {
return CqlSession.builder().withKeyspace(KEYSPACE).build();
}
}
#Table(value = "tabledemoach")
#Data
public class User {
#PrimaryKey
private int id;
private String phone;
private String name;
private String address;
private String email;
private int ciiu;
private String state;
private String user_activation_status;
private LocalDate creation_date;
}
#Override
public void createUser(User user) {
List<User> userFind = (List<User>) userRepository.findAll();
var userList =userFind.stream().map(x -> x.getPhone());
var repeated = (userList.filter(x ->
x.contains(user.getPhone()))).collect(Collectors.toList());
if(repeated.size() <= 0){
userRepository.save(user);
}
}

Answer 1

There are several ways to configure the consistency level. You can define the default consistency in an application.conf file with:
datastax-java-driver {
basic {
request {
consistency = LOCAL_QUORUM
}
}
}
You can also configure it when using InsertOptions and UpdateOptions. For example:
InsertOptions insertOptions =
org.springframework.data.cassandra.core.InsertOptions.builder()
.consistencyLevel(ConsistencyLevel.LOCAL_QUORUM)
.build();
You can also use the #Consistency annotation, for example:
#Consistency(ConsistencyLevel.LOCAL_QUORUM)
List<Person> findByLastname(String lastname);
Finally with QueryOptions:
QueryOptions queryOptions =
newQueryOptions.setConsistencyLevel(ConsistencyLevel.LOCAL_QUORUM);

Answer 2

Here is an example of Spring Boot and Amazon Keyspaces
https://github.com/aws-samples/amazon-keyspaces-examples/tree/main/java/datastax-v4/spring
package com.example.demo;
import com.datastax.oss.driver.api.core.CqlSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.cassandra.core.CassandraOperations;
import org.springframework.data.cassandra.core.cql.CqlTemplate;
import org.springframework.data.cassandra.repository.config.EnableCassandraRepositories;
#SpringBootApplication
#EnableCassandraRepositories(basePackages="com.example.model")
public class DemoApplication implements CommandLineRunner {
#Autowired
private CassandraOperations cassandraTemplate;
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
#Override
public void run(String... args) throws Exception {
CqlTemplate cqlTemplate = (CqlTemplate) cassandraTemplate.getCqlOperations();
CqlSession session = cqlTemplate.getSession();
int count = session.execute ("SELECT * FROM system.peers").all().size();
System.out.println("Number of hosts: "+ count);
}
}