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use std::env;
use std::time::Duration;
use crate::config::ServerConfig;
use crate::config::{DEFAULT_BATCH_SIZE, DEFAULT_STATUS_INTERVAL};
use crate::key::KmsProtection;
use crate::Error;
pub struct EnvironmentConfig {
port: u16,
interface: String,
seed: Vec<u8>,
batch_size: u8,
status_interval: Duration,
kms_protection: KmsProtection,
health_check_port: Option<u16>,
client_stats: bool,
fault_percentage: u8,
}
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";
const ROUGHENOUGH_KMS_PROTECTION: &str = "ROUGHENOUGH_KMS_PROTECTION";
const ROUGHENOUGH_HEALTH_CHECK_PORT: &str = "ROUGHENOUGH_HEALTH_CHECK_PORT";
const ROUGHENOUGH_CLIENT_STATS: &str = "ROUGHENOUGH_CLIENT_STATS";
const ROUGHENOUGH_FAULT_PERCENTAGE: &str = "ROUGHENOUGH_FAULT_PERCENTAGE";
impl EnvironmentConfig {
pub fn new() -> Result<Self, Error> {
let mut cfg = EnvironmentConfig {
port: 0,
interface: "".to_string(),
seed: Vec::new(),
batch_size: DEFAULT_BATCH_SIZE,
status_interval: DEFAULT_STATUS_INTERVAL,
kms_protection: KmsProtection::Plaintext,
health_check_port: None,
client_stats: false,
fault_percentage: 0,
};
if let Ok(port) = env::var(ROUGHENOUGH_PORT) {
cfg.port = port
.parse()
.unwrap_or_else(|_| panic!("invalid port: {}", port));
};
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("invalid seed value; 'seed' should be a hex value");
};
if let Ok(batch_size) = env::var(ROUGHENOUGH_BATCH_SIZE) {
cfg.batch_size = batch_size
.parse()
.unwrap_or_else(|_| panic!("invalid batch_size: {}", batch_size));
};
if let Ok(status_interval) = env::var(ROUGHENOUGH_STATUS_INTERVAL) {
let val: u16 = status_interval
.parse()
.unwrap_or_else(|_| panic!("invalid status_interval: {}", status_interval));
cfg.status_interval = Duration::from_secs(u64::from(val));
};
if let Ok(kms_protection) = env::var(ROUGHENOUGH_KMS_PROTECTION) {
cfg.kms_protection = kms_protection
.parse()
.unwrap_or_else(|_| panic!("invalid kms_protection value: {}", kms_protection));
}
if let Ok(health_check_port) = env::var(ROUGHENOUGH_HEALTH_CHECK_PORT) {
let val: u16 = health_check_port
.parse()
.unwrap_or_else(|_| panic!("invalid health_check_port: {}", health_check_port));
cfg.health_check_port = Some(val);
};
if let Ok(mut client_stats) = env::var(ROUGHENOUGH_CLIENT_STATS) {
client_stats.make_ascii_lowercase();
cfg.client_stats = client_stats == "yes" || client_stats == "on";
}
if let Ok(fault_percentage) = env::var(ROUGHENOUGH_FAULT_PERCENTAGE) {
cfg.fault_percentage = fault_percentage
.parse()
.unwrap_or_else(|_| panic!("invalid fault_percentage: {}", fault_percentage));
};
Ok(cfg)
}
}
impl ServerConfig for EnvironmentConfig {
fn interface(&self) -> &str {
self.interface.as_ref()
}
fn port(&self) -> u16 {
self.port
}
fn seed(&self) -> Vec<u8> {
self.seed.clone()
}
fn batch_size(&self) -> u8 {
self.batch_size
}
fn status_interval(&self) -> Duration {
self.status_interval
}
fn kms_protection(&self) -> &KmsProtection {
&self.kms_protection
}
fn health_check_port(&self) -> Option<u16> {
self.health_check_port
}
fn client_stats_enabled(&self) -> bool {
self.client_stats
}
fn fault_percentage(&self) -> u8 {
self.fault_percentage
}
}