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https://github.com/OMGeeky/tarpc.git
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2c09a35705
* Make a reactor handle mandatory for server. This removes the Send bound from FutureService. The Send bound is still required for SyncService, since clones are sent to new threads for each request. (This is more fodder for the argument that there should be a distinct Options struct for each combination of async/sync and client/server.) This commit also makes FutureService::listen return an io::Result rather than a Future; the future was never really necessary and had the unintended consequence of making SyncService::listen deadlock when the options specified a handle (because that means the reactor driving the service lives on the same thread that SyncService is waiting on). `SyncClient` is no longer `Clone` because it needs to create a new `reactor::Core` when cloning. Tokio Clients are `Clone` but they don't allow moving the cloned client onto a new reactor. * Change pubsub to use Rc<Refcell<>> instead of Arc<Mutex<>>. This is possible since services no longer need to be Send. * Remove some unnecessary unstable features. There 3 remaining unstable features. The hardest to remove is plugin, because we rely on compiler plugins to rewrite types from snake case to camel. It's possible this can be removed before the proc macros rewrite lands if impl Trait is extended to work with traits. * Clean up example * Sync servers now spawn a reactor on a thread. It's decided that sync users should not have to know about tokio at all. * Don't allow specifying a reactor::Core on client options. * Fail fast in server::listen if local_addr() returns Err.
62 lines
1.6 KiB
Rust
62 lines
1.6 KiB
Rust
// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Licensed under the MIT License, <LICENSE or http://opensource.org/licenses/MIT>.
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// This file may not be copied, modified, or distributed except according to those terms.
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#![feature(conservative_impl_trait, plugin)]
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#![plugin(tarpc_plugins)]
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extern crate futures;
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#[macro_use]
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extern crate tarpc;
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#[macro_use]
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extern crate serde_derive;
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extern crate tokio_core;
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use std::error::Error;
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use std::fmt;
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use tarpc::{client, server};
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use tarpc::client::sync::ClientExt;
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use tarpc::util::FirstSocketAddr;
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service! {
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rpc hello(name: String) -> String | NoNameGiven;
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}
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#[derive(Debug, Deserialize, Serialize)]
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pub struct NoNameGiven;
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impl fmt::Display for NoNameGiven {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.description())
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}
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}
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impl Error for NoNameGiven {
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fn description(&self) -> &str {
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r#"The empty String, "", is not a valid argument to rpc `hello`."#
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}
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}
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#[derive(Clone)]
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struct HelloServer;
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impl SyncService for HelloServer {
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fn hello(&self, name: String) -> Result<String, NoNameGiven> {
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if name == "" {
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Err(NoNameGiven)
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} else {
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Ok(format!("Hello, {}!", name))
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}
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}
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}
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fn main() {
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let addr = HelloServer.listen("localhost:10000".first_socket_addr(),
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server::Options::default())
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.unwrap();
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let mut client = SyncClient::connect(addr, client::Options::default()).unwrap();
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println!("{}", client.hello("Mom".to_string()).unwrap());
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println!("{}", client.hello("".to_string()).unwrap_err());
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}
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