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|
// Scheduled query execution module
use crate::config::{Config, ScheduledQueryTask};
use crate::db::Database;
use crate::logging::AuditLogger;
use chrono::Utc;
use std::sync::Arc;
use tokio::time::{interval, Duration};
use tracing::{error, info, warn};
pub struct QueryScheduler {
config: Arc<Config>,
database: Database,
logging: AuditLogger,
}
impl QueryScheduler {
pub fn new(config: Arc<Config>, database: Database, logging: AuditLogger) -> Self {
Self {
config,
database,
logging,
}
}
/// Spawn background tasks for all enabled scheduled queries
pub fn spawn_tasks(&self) {
let Some(scheduled_config) = &self.config.scheduled_queries else {
info!("No scheduled queries configured");
return;
};
if scheduled_config.tasks.is_empty() {
info!("No scheduled query tasks defined");
return;
}
let enabled_tasks: Vec<&ScheduledQueryTask> = scheduled_config
.tasks
.iter()
.filter(|task| task.enabled)
.collect();
if enabled_tasks.is_empty() {
info!("No enabled scheduled query tasks");
return;
}
info!(
"Spawning {} enabled scheduled query task(s)",
enabled_tasks.len()
);
for task in enabled_tasks {
let task_clone = task.clone();
let database = self.database.clone();
let logging = self.logging.clone();
tokio::spawn(async move {
Self::run_scheduled_task(task_clone, database, logging).await;
});
}
}
async fn run_scheduled_task(
task: ScheduledQueryTask,
database: Database,
logging: AuditLogger,
) {
let mut interval_timer = interval(Duration::from_secs(task.interval_minutes * 60));
let mut first_run = true;
info!(
"Scheduled task '{}' started (interval: {}min, run_on_startup: {}): {}",
task.name, task.interval_minutes, task.run_on_startup, task.description
);
loop {
interval_timer.tick().await;
if !database.is_available() {
warn!(
"Skipping scheduled task '{}' because database is unavailable",
task.name
);
log_task_event(
&logging,
"scheduler_skip",
&task.name,
"Database unavailable, task skipped",
false,
)
.await;
continue;
}
// Skip first execution if run_on_startup is false
if first_run && !task.run_on_startup {
first_run = false;
info!(
"Scheduled task '{}' skipping initial run (run_on_startup=false)",
task.name
);
continue;
}
first_run = false;
match sqlx::query(&task.query).execute(database.pool()).await {
Ok(result) => {
database.mark_available();
info!(
"Scheduled task '{}' executed successfully (rows affected: {})",
task.name,
result.rows_affected()
);
log_task_event(
&logging,
"scheduler_success",
&task.name,
&format!(
"Task executed successfully (rows affected: {})",
result.rows_affected()
),
false,
)
.await;
}
Err(e) => {
database.mark_unavailable();
error!(
"Scheduled task '{}' failed: {} (query: {})",
task.name, e, task.query
);
log_task_event(
&logging,
"scheduler_failure",
&task.name,
&format!("Task failed: {}", e),
true,
)
.await;
}
}
}
}
}
async fn log_task_event(
logging: &AuditLogger,
context: &str,
task_name: &str,
message: &str,
as_error: bool,
) {
let request_id = AuditLogger::generate_request_id();
let timestamp = Utc::now();
let full_message = format!("{}: {}", task_name, message);
let result = if as_error {
logging
.log_error(
&request_id,
timestamp,
&full_message,
Some(context),
Some("system"),
None,
)
.await
} else {
logging
.log_info(
&request_id,
timestamp,
&full_message,
Some(context),
Some("system"),
None,
)
.await
};
if let Err(err) = result {
error!("Failed to record scheduler event ({}): {}", context, err);
}
}
|
