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// Copyright 2017-2018 int08h LLC
//
// 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.
extern crate hex;
use std::env;
use std::net::SocketAddr;
use std::time::Duration;
use Error;
use config::ServerConfig;
use config::{DEFAULT_BATCH_SIZE, DEFAULT_STATUS_INTERVAL};
///
/// Obtain a Roughenough server configuration ([ServerConfig](trait.ServerConfig.html))
/// from environment variables.
///
/// Config parameter | Environment Variable
/// ---------------- | --------------------
/// port | `ROUGHENOUGH_PORT`
/// interface | `ROUGHENOUGH_INTERFACE`
/// seed | `ROUGHENOUGH_SEED`
/// batch_size | `ROUGHENOUGH_BATCH_SIZE`
/// status_interval | `ROUGHENOUGH_STATUS_INTERVAL`
///
pub struct EnvironmentConfig {
port: u16,
interface: String,
seed: Vec<u8>,
batch_size: u8,
status_interval: Duration,
}
const ROUGHENOUGH_PORT: &str = "ROUGHENOUGH_PORT";
const ROUGHENOUGH_INTERFACE: &str = "ROUGHENOUGH_INTERFACE";
const ROUGHENOUGH_SEED: &str = "ROUGHENOUGH_SEED";
const ROUGHENOUGH_BATCH_SIZE: &str = "ROUGHENOUGH_BATCH_SIZE";
const ROUGHENOUGH_STATUS_INTERVAL: &str = "ROUGHENOUGH_STATUS_INTERVAL";
impl EnvironmentConfig {
pub fn new() -> Self {
let mut cfg = EnvironmentConfig {
port: 0,
interface: "".to_string(),
seed: Vec::new(),
batch_size: DEFAULT_BATCH_SIZE,
status_interval: DEFAULT_STATUS_INTERVAL,
};
if let Ok(port) = env::var(ROUGHENOUGH_PORT) {
cfg.port = port
.parse()
.expect(format!("invalid port: {}", port).as_ref());
};
if let Ok(interface) = env::var(ROUGHENOUGH_INTERFACE) {
cfg.interface = interface.to_string();
};
if let Ok(seed) = env::var(ROUGHENOUGH_SEED) {
cfg.seed = hex::decode(&seed).expect(
format!(
"invalid seed value: {}\n'seed' should be 32 byte hex value",
seed
).as_ref(),
);
};
if let Ok(batch_size) = env::var(ROUGHENOUGH_BATCH_SIZE) {
cfg.batch_size = batch_size
.parse()
.expect(format!("invalid batch_size: {}", batch_size).as_ref());
};
if let Ok(status_interval) = env::var(ROUGHENOUGH_STATUS_INTERVAL) {
let val: u16 = status_interval
.parse()
.expect(format!("invalid status_interval: {}", status_interval).as_ref());
cfg.status_interval = Duration::from_secs(val as u64);
};
cfg
}
}
impl ServerConfig for EnvironmentConfig {
fn interface(&self) -> &str {
self.interface.as_ref()
}
fn port(&self) -> u16 {
self.port
}
fn seed(&self) -> &[u8] {
&self.seed
}
fn batch_size(&self) -> u8 {
self.batch_size
}
fn status_interval(&self) -> Duration {
self.status_interval
}
fn socket_addr(&self) -> Result<SocketAddr, Error> {
let addr = format!("{}:{}", self.interface, self.port);
match addr.parse() {
Ok(v) => Ok(v),
Err(_) => Err(Error::InvalidConfiguration(addr)),
}
}
}
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