feat(outputs): add file

This commit is contained in:
2026-01-21 20:26:10 +08:00
parent ee4be2dfa9
commit d83c33ef27
3 changed files with 137 additions and 1 deletions

View File

@@ -2,21 +2,88 @@
use super::LogOutput;
use crate::model::LogRecord;
use async_trait::async_trait;
use chrono::{Datelike, TimeZone, Utc};
use sqlx::PgPool;
use tokio::sync::RwLock;
pub struct PostgresOutput {
pool: PgPool,
active_month: RwLock<String>,
}
impl PostgresOutput {
pub fn new(pool: PgPool) -> Self {
Self { pool }
Self {
pool,
active_month: RwLock::new(String::new()),
}
}
async fn ensure_partition_exists(&self, timestamp: &chrono::DateTime<Utc>) {
let current_month_suffix = timestamp.format("%Y_%m").to_string();
// 1. 快速检查(读锁):如果内存里的月份和当前日志月份一致,直接返回,不做任何 DB 操作
{
let last_month = self.active_month.read().await;
if *last_month == current_month_suffix {
return;
}
} // 读锁在这里自动释放
// 2. 需要建表(写锁):可能是新启动,或者跨月了
let mut last_month = self.active_month.write().await;
// 双重检查:防止多个线程同时拿到写锁重复执行
if *last_month == current_month_suffix {
return;
}
// --- 开始计算日期范围 ---
let year = timestamp.year();
let month = timestamp.month();
// 本月 1 号
let start_date = Utc.with_ymd_and_hms(year, month, 1, 0, 0, 0).unwrap();
// 下个月 1 号 (处理 12 月跨年的情况)
let (next_year, next_month) = if month == 12 {
(year + 1, 1)
} else {
(year, month + 1)
};
let end_date = Utc
.with_ymd_and_hms(next_year, next_month, 1, 0, 0, 0)
.unwrap();
let table_name = format!("app_logs_{}", current_month_suffix);
let start_str = start_date.format("%Y-%m-%d").to_string();
let end_str = end_date.format("%Y-%m-%d").to_string();
// --- 执行建表 SQL ---
// 注意Postgres 的分区表名不能用参数绑定 ($1),只能用 format! 拼接
// 因为我们是用 chrono 生成的字符串,没有 SQL 注入风险
let create_sql = format!(
"CREATE TABLE IF NOT EXISTS {} PARTITION OF app_logs FOR VALUES FROM ('{}') TO ('{}')",
table_name, start_str, end_str
);
// 如果建表失败,打印错误但不 panic因为可能是并发创建导致的虽然 IF NOT EXISTS 能防大部分)
if let Err(e) = sqlx::query(&create_sql).execute(&self.pool).await {
eprintln!("Error creating partition table {}: {}", table_name, e);
} else {
println!("Partition table checked/created: {}", table_name);
}
// 更新缓存
*last_month = current_month_suffix;
}
}
#[async_trait]
impl LogOutput for PostgresOutput {
async fn write(&self, record: &LogRecord) {
self.ensure_partition_exists(&record.timestamp).await;
let query = r#"
INSERT INTO app_logs (service_name, log_level, message, module, created_at)
VALUES ($1, $2, $3, $4, $5)