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use r2d2;
use std::cell::RefCell;
use cluster::{GetCompressor, GetConnection};
use error;
use frame::parser::from_connection;
use frame::{Flag, Frame, IntoBytes};
use query::{Query, QueryParams, QueryParamsBuilder, QueryValues};
use transport::CDRSTransport;
pub trait QueryExecutor<
T: CDRSTransport + 'static,
M: r2d2::ManageConnection<Connection = RefCell<T>, Error = error::Error> + Sized,
>: GetConnection<T, M> + GetCompressor<'static>
{
fn query_with_params_tw<Q: ToString>(
&self,
query: Q,
query_params: QueryParams,
with_tracing: bool,
with_warnings: bool,
) -> error::Result<Frame> {
let query = Query {
query: query.to_string(),
params: query_params,
};
let mut flags = vec![];
if with_tracing {
flags.push(Flag::Tracing);
}
if with_warnings {
flags.push(Flag::Warning);
}
let query_frame = Frame::new_query(query, flags).into_cbytes();
let ref compression = self.get_compressor();
self
.get_connection()
.ok_or(error::Error::from("Unable to get transport"))
.and_then(|transport_cell| {
let write_res = transport_cell
.borrow_mut()
.write(query_frame.as_slice())
.map_err(error::Error::from);
write_res.map(|_| transport_cell)
})
.and_then(|transport_cell| from_connection(&transport_cell, compression))
}
fn query<Q: ToString>(&self, query: Q) -> error::Result<Frame> {
self.query_tw(query, false, false)
}
fn query_tw<Q: ToString>(
&self,
query: Q,
with_tracing: bool,
with_warnings: bool,
) -> error::Result<Frame> {
let query_params = QueryParamsBuilder::new().finalize();
self.query_with_params_tw(query, query_params, with_tracing, with_warnings)
}
fn query_with_values<Q: ToString, V: Into<QueryValues>>(
&self,
query: Q,
values: V,
) -> error::Result<Frame> {
self.query_with_values_tw(query, values, false, false)
}
fn query_with_values_tw<Q: ToString, V: Into<QueryValues>>(
&self,
query: Q,
values: V,
with_tracing: bool,
with_warnings: bool,
) -> error::Result<Frame> {
let query_params_builder = QueryParamsBuilder::new();
let query_params = query_params_builder.values(values.into()).finalize();
self.query_with_params_tw(query, query_params, with_tracing, with_warnings)
}
fn query_with_params<Q: ToString>(
&self,
query: Q,
query_params: QueryParams,
) -> error::Result<Frame> {
self.query_with_params_tw(query, query_params, false, false)
}
}