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18d6188 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 | use crate::domain::error::{AppError, AppResult};
use crate::infrastructure::repositories::{IdempotencyRecord, IdempotencyRepository};
use async_trait::async_trait;
use dashmap::DashMap;
use once_cell::sync::Lazy;
use sha2::{Digest, Sha256};
use std::sync::Arc;
use std::time::{Duration, Instant};
#[derive(Clone)]
struct CachedIdempotency {
response_data: Option<String>,
request_hash: String,
status: String,
expires_at: Instant,
}
static IDEMPOTENCY_CACHE: Lazy<DashMap<String, CachedIdempotency>> = Lazy::new(DashMap::new);
const MAX_IDEMPOTENCY_ENTRIES: usize = 50_000;
fn prune_idempotency_cache() {
let now = Instant::now();
IDEMPOTENCY_CACHE.retain(|_, cached| cached.expires_at > now);
if IDEMPOTENCY_CACHE.len() > MAX_IDEMPOTENCY_ENTRIES {
let mut keys_to_remove = Vec::new();
for entry in IDEMPOTENCY_CACHE.iter() {
keys_to_remove.push(entry.key().clone());
if keys_to_remove.len() >= MAX_IDEMPOTENCY_ENTRIES / 2 {
break;
}
}
for k in keys_to_remove {
IDEMPOTENCY_CACHE.remove(&k);
}
}
}
#[async_trait]
pub trait IdempotencyService: Send + Sync {
async fn check_idempotency(
&self,
key: &str,
merchant_id: &str,
action_scope: &str,
request_body: &[u8],
) -> AppResult<IdempotencyStatus>;
async fn complete_idempotency(
&self,
key: &str,
merchant_id: &str,
action_scope: &str,
response_json: &str,
) -> AppResult<()>;
}
pub enum IdempotencyStatus {
New,
InProgress,
Completed(String),
}
pub struct RtixIdempotencyService {
repo: Arc<dyn IdempotencyRepository>,
}
impl RtixIdempotencyService {
pub fn new(repo: Arc<dyn IdempotencyRepository>) -> Self {
Self { repo }
}
fn calculate_hash(data: &[u8]) -> String {
let mut hasher = Sha256::new();
hasher.update(data);
format!("{:x}", hasher.finalize())
}
}
#[async_trait]
impl IdempotencyService for RtixIdempotencyService {
async fn check_idempotency(
&self,
key: &str,
merchant_id: &str,
action_scope: &str,
request_body: &[u8],
) -> AppResult<IdempotencyStatus> {
let request_hash = Self::calculate_hash(request_body);
let cache_key = format!("{}:{}:{}", key, merchant_id, action_scope);
// 1. Check Cache
if let Some(cached) = IDEMPOTENCY_CACHE.get(&cache_key) {
if cached.expires_at > Instant::now() {
if cached.request_hash != request_hash {
return Err(AppError::Conflict(
"Idempotency key reused with different request payload".to_string(),
));
}
return match cached.status.as_str() {
"COMPLETED" => Ok(IdempotencyStatus::Completed(
cached.response_data.clone().unwrap_or_default(),
)),
"IN_PROGRESS" => Ok(IdempotencyStatus::InProgress),
_ => Ok(IdempotencyStatus::New),
};
}
}
// 2. Check Repository
if let Some(record) = self.repo.get_record(key, merchant_id, action_scope).await? {
if record.request_hash != request_hash {
return Err(AppError::Conflict(
"Idempotency key reused with different request payload".to_string(),
));
}
prune_idempotency_cache();
IDEMPOTENCY_CACHE.insert(
cache_key,
CachedIdempotency {
response_data: record.response_data.clone(),
request_hash: record.request_hash.clone(),
status: record.status.clone(),
expires_at: Instant::now() + Duration::from_secs(3600),
},
);
return match record.status.as_str() {
"COMPLETED" => Ok(IdempotencyStatus::Completed(
record.response_data.unwrap_or_default(),
)),
"IN_PROGRESS" => Ok(IdempotencyStatus::InProgress),
_ => Ok(IdempotencyStatus::New),
};
}
// Create new record
let record = IdempotencyRecord {
key: key.to_string(),
merchant_id: merchant_id.to_string(),
action_scope: action_scope.to_string(),
request_hash: request_hash.clone(),
response_data: None,
status: "IN_PROGRESS".to_string(),
};
self.repo.save_record(&record).await?;
prune_idempotency_cache();
IDEMPOTENCY_CACHE.insert(
cache_key,
CachedIdempotency {
response_data: None,
request_hash,
status: "IN_PROGRESS".to_string(),
expires_at: Instant::now() + Duration::from_secs(3600),
},
);
Ok(IdempotencyStatus::New)
}
async fn complete_idempotency(
&self,
key: &str,
merchant_id: &str,
action_scope: &str,
response_json: &str,
) -> AppResult<()> {
self.repo
.update_response(key, merchant_id, action_scope, response_json, "COMPLETED")
.await?;
let cache_key = format!("{}:{}:{}", key, merchant_id, action_scope);
if let Some(mut cached) = IDEMPOTENCY_CACHE.get_mut(&cache_key) {
cached.status = "COMPLETED".to_string();
cached.response_data = Some(response_json.to_string());
cached.expires_at = Instant::now() + Duration::from_secs(3600);
} else {
if let Ok(Some(record)) = self.repo.get_record(key, merchant_id, action_scope).await {
prune_idempotency_cache();
IDEMPOTENCY_CACHE.insert(
cache_key,
CachedIdempotency {
response_data: Some(response_json.to_string()),
request_hash: record.request_hash,
status: "COMPLETED".to_string(),
expires_at: Instant::now() + Duration::from_secs(3600),
},
);
}
}
Ok(())
}
}
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