cdrs-tokio 9.0.2

use cdrs_tokio::authenticators::NoneAuthenticatorProvider;
use cdrs_tokio::cluster::session::{Session, SessionBuilder, TcpSessionBuilder};
use cdrs_tokio::cluster::{NodeTcpConfigBuilder, TcpConnectionManager};
use cdrs_tokio::load_balancing::RoundRobinLoadBalancingStrategy;
use cdrs_tokio::query::*;
use cdrs_tokio::query_values;
use cdrs_tokio::transport::TransportTcp;
use cdrs_tokio::{IntoCdrsValue, TryFromRow};
use std::sync::Arc;

type CurrentSession = Session<
    TransportTcp,
    TcpConnectionManager,
    RoundRobinLoadBalancingStrategy<TransportTcp, TcpConnectionManager>,
>;

#[derive(Clone, Debug, IntoCdrsValue, TryFromRow, PartialEq)]
struct RowStruct {
    key: i32,
}

impl RowStruct {
    fn into_query_values(self) -> QueryValues {
        // **IMPORTANT NOTE:** query values should be WITHOUT NAMES
        // https://github.com/apache/cassandra/blob/trunk/doc/native_protocol_v4.spec#L413
        query_values!(self.key)
    }
}

#[tokio::main]
async fn main() {
    let cluster_config = NodeTcpConfigBuilder::new()
        .with_contact_point("127.0.0.1:9042".into())
        .with_authenticator_provider(Arc::new(NoneAuthenticatorProvider))
        .build()
        .await
        .unwrap();
    let lb = RoundRobinLoadBalancingStrategy::new();
    let mut session = TcpSessionBuilder::new(lb, cluster_config)
        .build()
        .await
        .unwrap();

    create_keyspace(&mut session).await;
    create_table(&mut session).await;

    let insert_struct_cql = "INSERT INTO test_ks.my_test_table (key) VALUES (?)";
    let prepared_query = session
        .prepare(insert_struct_cql)
        .await
        .expect("Prepare query error");

    for k in 100..110 {
        let row = RowStruct { key: k };

        insert_row(&mut session, row, &prepared_query).await;
    }

    batch_few_queries(&mut session, insert_struct_cql).await;
}

async fn create_keyspace(session: &mut CurrentSession) {
    let create_ks: &'static str = "CREATE KEYSPACE IF NOT EXISTS test_ks WITH REPLICATION = { \
                                   'class' : 'SimpleStrategy', 'replication_factor' : 1 };";
    session
        .query(create_ks)
        .await
        .expect("Keyspace creation error");
}

async fn create_table(session: &mut CurrentSession) {
    let create_table_cql =
        "CREATE TABLE IF NOT EXISTS test_ks.my_test_table (key int PRIMARY KEY);";
    session
        .query(create_table_cql)
        .await
        .expect("Table creation error");
}

async fn insert_row(session: &mut CurrentSession, row: RowStruct, prepared_query: &PreparedQuery) {
    session
        .exec_with_values(prepared_query, row.into_query_values())
        .await
        .expect("exec_with_values error");
}

async fn batch_few_queries(session: &mut CurrentSession, query: &str) {
    let prepared_query = session.prepare(query).await.expect("Prepare query error");
    let row_1 = RowStruct { key: 1001 };
    let row_2 = RowStruct { key: 2001 };

    let batch = BatchQueryBuilder::new()
        .add_query_prepared(&prepared_query, row_1.into_query_values())
        .add_query(query, row_2.into_query_values())
        .build()
        .expect("batch builder");

    session.batch(batch).await.expect("batch query error");
}