1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
/* * Created on Wed May 05 2021 * * Copyright (c) 2021 Sayan Nandan <nandansayan@outlook.com> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ //! # Skytable client //! //! This library is the official client for the free and open-source NoSQL database //! [Skytable](https://github.com/skytable/skytable). First, go ahead and install Skytable by //! following the instructions [here](https://docs.skytable.io/getting-started). This library supports //! all Skytable versions that work with the [Skyhash 1.0 Protocol](https://docs.skytable.io/protocol/skyhash). //! This version of the library was tested with the latest Skytable release //! (release [0.6](https://github.com/skytable/skytable/releases/v0.6.0)). //! //! ## Using this library //! //! This library only ships with the bare minimum that is required for interacting with Skytable. Once you have //! Skytable installed and running, you're ready to follow this guide! //! //! We'll start by creating a new binary application and then running actions. Create a new binary application //! by running: //! ```shell //! cargo new skyapp //! ``` //! **Tip**: You can see a full list of the available actions [here](https://docs.skytable.io/actions-overview). //! //! First add this to your `Cargo.toml` file: //! ```toml //! skytable = "0.3.0" //! ``` //! Now open up your `src/main.rs` file and establish a connection to the server while also adding some //! imports: //! ```no_run //! use skytable::{Connection, Query, Response, Element}; //! fn main() -> std::io::Result<()> { //! let mut con = Connection::new("127.0.0.1", 2003)?; //! Ok(()) //! } //! ``` //! //! Now let's run a [`Query`]! Change the previous code block to: //! ```no_run //! use skytable::{Connection, Query, Response, Element}; //! fn main() -> std::io::Result<()> { //! let mut con = Connection::new("127.0.0.1", 2003)?; //! let query = Query::from("heya"); //! let res = con.run_simple_query(&query)?; //! assert_eq!(res, Response::Item(Element::String("HEY!".to_owned()))); //! Ok(()) //! } //! ``` //! //! Way to go — you're all set! Now go ahead and run more advanced queries! //! //! ## Async API //! //! If you need to use an `async` API, just change your import to: //! ```toml //! skytable = { version = "0.3.0-alpha.1", features=["async"], default-features=false } //! ``` //! You can now establish a connection by using `skytable::AsyncConnection::new()`, adding `.await`s wherever //! necessary. Do note that you'll the [Tokio runtime](https://tokio.rs). //! //! ## Using both `sync` and `async` APIs //! //! With this client driver, it is possible to use both sync and `async` APIs **at the same time**. To do //! this, simply change your import to: //! ```toml //! skytable = { version="0.3.0-alpha.1", features=["sync", "async"] } //! ``` //! //! ## Contributing //! //! Open-source, and contributions ... — they're always welcome! For ideas and suggestions, //! [create an issue on GitHub](https://github.com/skytable/client-rust/issues/new) and for patches, //! fork and open those pull requests [here](https://github.com/skytable/client-rust)! //! //! ## License //! This client library is distributed under the permissive //! [Apache-2.0 License](https://github.com/skytable/client-rust/blob/next/LICENSE). Now go build great apps! //! #![cfg_attr(docsrs, feature(doc_cfg))] pub mod actions; mod deserializer; mod respcode; pub mod types; use std::io::Result as IoResult; use types::IntoSkyhashAction; use types::IntoSkyhashBytes; // async imports #[cfg(feature = "async")] mod async_con; #[cfg(feature = "async")] #[cfg_attr(docsrs, doc(cfg(feature = "async")))] pub use async_con::Connection as AsyncConnection; #[cfg(feature = "async")] use tokio::io::AsyncWriteExt; #[cfg(feature = "async")] use tokio::net::TcpStream; // default imports pub use deserializer::Element; pub use respcode::RespCode; // sync imports #[cfg(feature = "sync")] #[cfg_attr(docsrs, doc(cfg(feature = "sync")))] mod sync; #[cfg(feature = "sync")] #[cfg_attr(docsrs, doc(cfg(feature = "sync")))] pub use sync::Connection; #[macro_export] /// A macro that can be used to easily create queries with _almost_ variadic properties. /// Where you'd normally create queries like this: /// ``` /// use skytable::Query; /// let q = Query::new().arg("mset").arg("x").arg("100").arg("y").arg("200"); /// ``` /// with this macro, you can just do this: /// ```ignore /// use skytable::query; /// let q = query!("mset", "x", "100", "y", "200"); /// ``` macro_rules! query { ($($arg:expr),+) => { crate::Query::new()$(.arg($arg))* }; } #[derive(Debug, PartialEq)] /// This struct represents a single simple query as defined by the Skyhash protocol /// /// A simple query is serialized into a flat string array which is nothing but a Skyhash serialized equivalent /// of an array of [`String`] items. To construct a query like `SET x 100`, one needs to: /// ``` /// use skytable::Query; /// fn main() { /// let q = Query::new().arg("set").arg("x").arg("100"); /// } /// ``` /// You can now run this with a [`Connection`] or an `AsyncConnection`. You can also created queries [`From`] /// objects that can be turned into actions. For example, these are completely valid constructions: /// ``` /// use skytable::Query; /// /// let q1 = Query::from(["mget", "x", "y", "z"]); /// let q2 = Query::from(vec!["mset", "x", "100", "y", "200", "z", "300"]); /// let q3 = Query::from("get").arg("x"); /// ``` /// Finally, queries can also be created by taking references. For example: /// ``` /// use skytable::Query; /// /// let my_keys = vec!["key1", "key2", "key3"]; /// let mut q = Query::new(); /// for key in my_keys { /// q.push(key); /// } /// ``` /// pub struct Query { size_count: usize, data: Vec<u8>, } impl<T> From<T> for Query where T: IntoSkyhashAction, { fn from(action: T) -> Self { Query::new().arg(action) } } impl Query { /// Create a new empty query with no arguments pub fn new() -> Self { Query { size_count: 0, data: Vec::new(), } } /// Add an argument to a query returning a [`Query`]. This can be used for queries built using the /// builder pattern. If you need to add items, by reference, consider using [`Query::push`] /// /// ## Panics /// This method will panic if the passed `arg` is empty pub fn arg(mut self, arg: impl IntoSkyhashAction) -> Self { arg.extend_bytes(&mut self.data); self.size_count += arg.incr_len_by(); self } /// Add an argument to a query taking a reference to it /// /// This is useful if you are adding queries in a loop than building it using the builder /// pattern (to use the builder-pattern, use [`Query::arg`]) pub fn push(&mut self, arg: impl IntoSkyhashAction) { arg.extend_bytes(&mut self.data); self.size_count += arg.incr_len_by(); } /// Number of items in the datagroup pub(crate) fn __len(&self) -> usize { self.size_count } fn get_holding_buffer(&self) -> &[u8] { &self.data } #[cfg(feature = "async")] /// Write a query to a given stream async fn write_query_to(&self, stream: &mut tokio::io::BufWriter<TcpStream>) -> IoResult<()> { // Write the metaframe stream.write_all(b"*1\n").await?; // Add the dataframe let number_of_items_in_datagroup = self.__len().to_string().into_bytes(); stream.write_all(&[b'_']).await?; stream.write_all(&number_of_items_in_datagroup).await?; stream.write_all(&[b'\n']).await?; stream.write_all(self.get_holding_buffer()).await?; Ok(()) } #[cfg(feature = "sync")] /// Write a query to a given stream fn write_query_to_sync(&self, stream: &mut std::net::TcpStream) -> IoResult<()> { use std::io::Write; // Write the metaframe stream.write_all(b"*1\n")?; // Add the dataframe let number_of_items_in_datagroup = self.__len().to_string().into_bytes(); stream.write_all(&[b'_'])?; stream.write_all(&number_of_items_in_datagroup)?; stream.write_all(&[b'\n'])?; stream.write_all(self.get_holding_buffer())?; Ok(()) } #[cfg(feature = "dbg")] #[cfg_attr(docsrs, doc(cfg(feature = "dbg")))] /// Get the raw bytes of a query /// /// This is a function that is **not intended for daily use** but is for developers working to improve/debug /// or extend the Skyhash protocol. [Skytable](https://github.com/skytable/skytable) itself uses this function /// to generate raw queries. Once you're done passing the arguments to a query, running this function will /// return the raw query that would be written to the stream, serialized using the Skyhash serialization protocol pub fn into_raw_query(&self) -> Vec<u8> { let mut v = Vec::with_capacity(self.data.len()); v.extend(b"*1\n"); v.extend(b"_"); v.extend(self.__len().to_string().into_bytes()); v.extend(b"\n"); v.extend(self.get_holding_buffer()); v } } /// # Responses /// /// This enum represents responses returned by the server. This can either be an array (or bulk), a single item /// or can be a parse error if the server returned some data but it couldn't be parsed into the expected type /// or it can be an invalid response in the event the server sent some invalid data. /// This enum is `#[non_exhaustive]` as more types of responses can be added in the future. #[derive(Debug, PartialEq)] #[non_exhaustive] pub enum Response { /// The server sent an invalid response InvalidResponse, /// The server responded with _something_. This can be any of the [`Element`] variants Item(Element), /// We failed to parse data ParseError, /// The server sent some data of a type that this client doesn't support UnsupportedDataType, }