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https://github.com/OMGeeky/tarpc.git
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e75193c191
This required the breaking change of removing the Client trait. The intent of the Client trait was to facilitate the decorator pattern by allowing users to create their own Clients that added behavior on top of the base client. Unfortunately, this trait had become a maintenance burden, consistently causing issues with lifetimes and the lack of generic associated types. Specifically, it meant that Client impls could not use async fns, which is no longer tenable today.
61 lines
2.1 KiB
Rust
61 lines
2.1 KiB
Rust
// Copyright 2018 Google LLC
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//
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file or at
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// https://opensource.org/licenses/MIT.
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use clap::{App, Arg};
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use std::{io, net::SocketAddr};
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use tarpc::{client, context, tokio_serde::formats::Json};
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#[tokio::main]
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async fn main() -> io::Result<()> {
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env_logger::init();
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let flags = App::new("Hello Client")
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.version("0.1")
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.author("Tim <tikue@google.com>")
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.about("Say hello!")
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.arg(
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Arg::with_name("server_addr")
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.long("server_addr")
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.value_name("ADDRESS")
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.help("Sets the server address to connect to.")
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.required(true)
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.takes_value(true),
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)
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.arg(
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Arg::with_name("name")
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.short("n")
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.long("name")
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.value_name("STRING")
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.help("Sets the name to say hello to.")
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.required(true)
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.takes_value(true),
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)
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.get_matches();
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let server_addr = flags.value_of("server_addr").unwrap();
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let server_addr = server_addr
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.parse::<SocketAddr>()
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.unwrap_or_else(|e| panic!(r#"--server_addr value "{}" invalid: {}"#, server_addr, e));
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let name = flags.value_of("name").unwrap().into();
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let mut transport = tarpc::serde_transport::tcp::connect(server_addr, Json::default);
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transport.config_mut().max_frame_length(usize::MAX);
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// WorldClient is generated by the service attribute. It has a constructor `new` that takes a
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// config and any Transport as input.
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let client = service::WorldClient::new(client::Config::default(), transport.await?).spawn()?;
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// The client has an RPC method for each RPC defined in the annotated trait. It takes the same
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// args as defined, with the addition of a Context, which is always the first arg. The Context
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// specifies a deadline and trace information which can be helpful in debugging requests.
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let hello = client.hello(context::current(), name).await?;
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println!("{}", hello);
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Ok(())
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}
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