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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
use std::collections::HashMap;
use std::convert::{From, Into};
use std::default::Default;
use std::sync::Mutex;
use clap::{clap_app, value_t};
use thrift::protocol::{TCompactInputProtocolFactory, TCompactOutputProtocolFactory};
use thrift::server::TServer;
use thrift::transport::{TFramedReadTransportFactory, TFramedWriteTransportFactory};
use thrift_tutorial::shared::{SharedServiceSyncHandler, SharedStruct};
use thrift_tutorial::tutorial::{CalculatorSyncHandler, CalculatorSyncProcessor};
use thrift_tutorial::tutorial::{InvalidOperation, Operation, Work};
fn main() {
match run() {
Ok(()) => println!("tutorial server ran successfully"),
Err(e) => {
println!("tutorial server failed with error {:?}", e);
std::process::exit(1);
}
}
}
fn run() -> thrift::Result<()> {
let options = clap_app!(rust_tutorial_server =>
(version: "0.1.0")
(author: "Apache Thrift Developers <dev@thrift.apache.org>")
(about: "Thrift Rust tutorial server")
(@arg port: --port +takes_value "port on which the tutorial server listens")
);
let matches = options.get_matches();
let port = value_t!(matches, "port", u16).unwrap_or(9090);
let listen_address = format!("127.0.0.1:{}", port);
println!("binding to {}", listen_address);
let i_tran_fact = TFramedReadTransportFactory::new();
let i_prot_fact = TCompactInputProtocolFactory::new();
let o_tran_fact = TFramedWriteTransportFactory::new();
let o_prot_fact = TCompactOutputProtocolFactory::new();
// demux incoming messages
let processor = CalculatorSyncProcessor::new(CalculatorServer {
..Default::default()
});
// create the server and start listening
let mut server = TServer::new(
i_tran_fact,
i_prot_fact,
o_tran_fact,
o_prot_fact,
processor,
10,
);
server.listen(&listen_address)
}
/// Handles incoming Calculator service calls.
struct CalculatorServer {
log: Mutex<HashMap<i32, SharedStruct>>,
}
impl Default for CalculatorServer {
fn default() -> CalculatorServer {
CalculatorServer {
log: Mutex::new(HashMap::new()),
}
}
}
// since Calculator extends SharedService we have to implement the
// handler for both traits.
//
// SharedService handler
impl SharedServiceSyncHandler for CalculatorServer {
fn handle_get_struct(&self, key: i32) -> thrift::Result<SharedStruct> {
let log = self.log.lock().unwrap();
log.get(&key)
.cloned()
.ok_or_else(|| format!("could not find log for key {}", key).into())
}
}
// Calculator handler
impl CalculatorSyncHandler for CalculatorServer {
fn handle_ping(&self) -> thrift::Result<()> {
println!("pong!");
Ok(())
}
fn handle_add(&self, num1: i32, num2: i32) -> thrift::Result<i32> {
println!("handling add: n1:{} n2:{}", num1, num2);
Ok(num1 + num2)
}
fn handle_calculate(&self, logid: i32, w: Work) -> thrift::Result<i32> {
println!("handling calculate: l:{}, w:{:?}", logid, w);
let res = if let Some(ref op) = w.op {
if w.num1.is_none() || w.num2.is_none() {
Err(InvalidOperation {
what_op: Some(op.into()),
why: Some("no operands specified".to_owned()),
})
} else {
// so that I don't have to call unwrap() multiple times below
let num1 = w.num1.as_ref().expect("operands checked");
let num2 = w.num2.as_ref().expect("operands checked");
match *op {
Operation::ADD => Ok(num1 + num2),
Operation::SUBTRACT => Ok(num1 - num2),
Operation::MULTIPLY => Ok(num1 * num2),
Operation::DIVIDE => {
if *num2 == 0 {
Err(InvalidOperation {
what_op: Some(op.into()),
why: Some("divide by 0".to_owned()),
})
} else {
Ok(num1 / num2)
}
}
_ => {
let op_val: i32 = op.into();
Err(InvalidOperation {
what_op: Some(op_val),
why: Some(format!("unsupported operation type '{}'", op_val)),
})
}
}
}
} else {
Err(InvalidOperation::new(
None,
"no operation specified".to_owned(),
))
};
// if the operation was successful log it
if let Ok(ref v) = res {
let mut log = self.log.lock().unwrap();
log.insert(logid, SharedStruct::new(logid, format!("{}", v)));
}
// the try! macro automatically maps errors
// but, since we aren't using that here we have to map errors manually
//
// exception structs defined in the IDL have an auto-generated
// impl of From::from
res.map_err(From::from)
}
fn handle_zip(&self) -> thrift::Result<()> {
println!("handling zip");
Ok(())
}
}
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