extern crate cassandra_cpp_sys;
extern crate num;
mod examples_util;
use examples_util::*;
use std::ffi::CString;
use cassandra_cpp_sys::*;
#[derive(Copy,Clone)]
struct Basic {
bln: cass_bool_t,
flt: f32,
dbl: f64,
i32: i32,
i64: i64,
}
fn prepare_query<'a>(session: &mut CassSession, query: &str) -> Result<&'a CassPrepared, CassError> {
unsafe {
let future = &mut *cass_session_prepare(session, CString::new(query).unwrap().as_ptr());
cass_future_wait(future);
let result = match cass_future_error_code(future) {
CASS_OK => {
let prepared = &*cass_future_get_prepared(future);
Ok(prepared)
}
rc => {
print_error(future);
Err(rc)
}
};
cass_future_free(future);
result
}
}
fn insert_into_basic(session: &mut CassSession, prepared: &CassPrepared, key: &str, basic: &Basic)
-> Result<(), CassError> {
unsafe {
let statement = cass_prepared_bind(prepared);
cass_statement_bind_string_by_name(statement,
CString::new("key").unwrap().as_ptr(),
CString::new(key).unwrap().as_ptr());
cass_statement_bind_bool_by_name(statement, CString::new("bln").unwrap().as_ptr(), basic.bln);
cass_statement_bind_float_by_name(statement, CString::new("flt").unwrap().as_ptr(), basic.flt);
cass_statement_bind_double_by_name(statement, CString::new("dbl").unwrap().as_ptr(), basic.dbl);
cass_statement_bind_int32_by_name(statement, CString::new("i32").unwrap().as_ptr(), basic.i32);
cass_statement_bind_int64_by_name(statement, CString::new("i64").unwrap().as_ptr(), basic.i64);
let future = &mut *cass_session_execute(session, statement);
cass_future_wait(future);
let result = match cass_future_error_code(future) {
CASS_OK => {
println!("Bind by name insert succeeded");
Ok(())
}
err => {
print_error(future);
Err(err)
}
};
cass_future_free(future);
cass_statement_free(statement);
result
}
}
fn select_from_basic<'a>(session: &mut CassSession, prepared: &CassPrepared, key: &str, basic: Basic)
-> Result<Basic, CassError> {
unsafe {
let statement = cass_prepared_bind(prepared);
cass_prepared_free(prepared);
cass_statement_bind_string_by_name(statement,
CString::new("key").unwrap().as_ptr(),
CString::new(key).unwrap().as_ptr());
let future = &mut *cass_session_execute(session, statement);
cass_future_wait(future);
let rc = cass_future_error_code(future);
let result = match rc {
CASS_OK => {
let mut output = basic;
let result = cass_future_get_result(future);
let iterator = cass_iterator_from_result(result);
if cass_iterator_next(iterator) == cass_true {
let row = cass_iterator_get_row(iterator);
cass_value_get_bool(cass_row_get_column_by_name(row, CString::new("bln").unwrap().as_ptr()),
&mut output.bln);
cass_value_get_double(cass_row_get_column_by_name(row, CString::new("dbl").unwrap().as_ptr()),
&mut output.dbl);
cass_value_get_float(cass_row_get_column_by_name(row, CString::new("flt").unwrap().as_ptr()),
&mut output.flt);
cass_value_get_int32(cass_row_get_column_by_name(row, CString::new("i32").unwrap().as_ptr()),
&mut output.i32);
cass_value_get_int64(cass_row_get_column_by_name(row, CString::new("i64").unwrap().as_ptr()),
&mut output.i64);
}
cass_iterator_free(iterator);
cass_result_free(result);
Ok(basic)
}
_ => {
print_error(future);
Err(rc)
}
};
cass_future_free(future);
cass_statement_free(statement);
result
}
}
fn main() {
unsafe {
let cluster = create_cluster();
let session = &mut *cass_session_new();
let input = Basic {
bln: cass_true,
flt: 0.001,
dbl: 0.0002,
i32: 1,
i64: 2,
};
let insert_query = "INSERT INTO examples.basic (key, bln, flt, dbl, i32, i64) VALUES (?, ?, ?, ?, ?, ?);";
let select_query = "SELECT * FROM examples.basic WHERE key = ?";
match connect_session(session, cluster) {
Ok(()) => {
execute_query(session,
"CREATE KEYSPACE IF NOT EXISTS examples WITH replication = { \'class\': \
\'SimpleStrategy\', \'replication_factor\': \'1\' };")
.unwrap();
execute_query(session,
"CREATE TABLE IF NOT EXISTS examples.basic (key text, bln boolean, flt float, dbl \
double,i32 int, i64 bigint, PRIMARY KEY (key));")
.unwrap();
match prepare_query(session, &insert_query) {
Ok(insert_prepared) => {
insert_into_basic(session, insert_prepared, "prepared_test", &input).unwrap();
cass_prepared_free(insert_prepared);
match prepare_query(session, &select_query) {
Ok(select_prepared) => {
let output = select_from_basic(session, select_prepared, "prepared_test", input)
.unwrap();
assert!(input.bln.clone() == output.bln);
assert!(input.flt == output.flt);
assert!(input.dbl == output.dbl);
assert!(input.i32 == output.i32);
assert!(input.i64 == output.i64);
}
_ => panic!("couldn't query"),
}
}
_ => panic!("couldn't prepare query"),
}
}
rc => {
println!("Error: {:?}", rc);
}
}
let close_future = cass_session_close(session);
cass_future_wait(close_future);
cass_future_free(close_future);
cass_cluster_free(&mut *cluster);
cass_session_free(session);
}
}