lemmy/src/scheduled_tasks.rs
Dessalines 5d837780f5
Add diesel_async, get rid of blocking function (#2510)
* Moving settings to Database.

- Moves many settings into the database. Fixes #2285
- Adds a local_site and instance table. Fixes #2365 . Fixes #2368
- Separates SQL update an insert forms, to avoid runtime errors.
- Adds TypedBuilder to all the SQL forms, instead of default.

* Fix weird clippy issue.

* Removing extra lines.

* Some fixes from suggestions.

* Fixing apub tests.

* Using instance creation helper function.

* Move forms to their own line.

* Trying to fix local_site_data, still broken.

* Testing out async

* Testing out async 2

* Fixing federation tests.

* Trying to fix check features 1.

* Starting on adding diesel async. 1/4th done.

* Added async to views and schema.

* Adding some more async

* Compiling now.

* Added diesel async. Fixes #2465

* Running clippy --fix

* Trying to fix cargo test on drone.

* Trying new muslrust.

* Trying a custom dns

* Trying a custom dns 2

* Trying a custom dns 3

* Trying a custom dns 4

* Trying a custom dns 5

* Trying a custom dns 6

* Trying a custom dns 7

* Addressing PR comments.

* Adding check_apub to all verify functions.

* Reverting back drone.

* Fixing merge

* Fix docker images.

* Adding missing discussion_languages.

* Trying to fix federation tests.

* Fix site setup user creation.

* Fix clippy

* Fix clippy 2

* Test api faster

* Try to fix 1

* Try to fix 2

* What are these lines about

* Trying to fix 3

* Moving federation test back to top.

* Remove logging cat.
2022-11-09 10:05:00 +00:00

122 lines
4.1 KiB
Rust

use clokwerk::{Scheduler, TimeUnits};
// Import week days and WeekDay
use diesel::{sql_query, PgConnection, RunQueryDsl};
use diesel::{Connection, ExpressionMethods, QueryDsl};
use lemmy_utils::error::LemmyError;
use std::{thread, time::Duration};
use tracing::info;
/// Schedules various cleanup tasks for lemmy in a background thread
pub fn setup(db_url: String) -> Result<(), LemmyError> {
// Setup the connections
let mut scheduler = Scheduler::new();
let mut conn = PgConnection::establish(&db_url).expect("could not establish connection");
active_counts(&mut conn);
update_banned_when_expired(&mut conn);
// On startup, reindex the tables non-concurrently
// TODO remove this for now, since it slows down startup a lot on lemmy.ml
reindex_aggregates_tables(&mut conn, true);
scheduler.every(1.hour()).run(move || {
let conn = &mut PgConnection::establish(&db_url)
.unwrap_or_else(|_| panic!("Error connecting to {}", db_url));
active_counts(conn);
update_banned_when_expired(conn);
reindex_aggregates_tables(conn, true);
drop_ccnew_indexes(conn);
});
clear_old_activities(&mut conn);
scheduler.every(1.weeks()).run(move || {
clear_old_activities(&mut conn);
});
// Manually run the scheduler in an event loop
loop {
scheduler.run_pending();
thread::sleep(Duration::from_millis(1000));
}
}
/// Reindex the aggregates tables every one hour
/// This is necessary because hot_rank is actually a mutable function:
/// https://dba.stackexchange.com/questions/284052/how-to-create-an-index-based-on-a-time-based-function-in-postgres?noredirect=1#comment555727_284052
fn reindex_aggregates_tables(conn: &mut PgConnection, concurrently: bool) {
for table_name in &[
"post_aggregates",
"comment_aggregates",
"community_aggregates",
] {
reindex_table(conn, table_name, concurrently);
}
}
fn reindex_table(conn: &mut PgConnection, table_name: &str, concurrently: bool) {
let concurrently_str = if concurrently { "concurrently" } else { "" };
info!("Reindexing table {} {} ...", concurrently_str, table_name);
let query = format!("reindex table {} {}", concurrently_str, table_name);
sql_query(query).execute(conn).expect("reindex table");
info!("Done.");
}
/// Clear old activities (this table gets very large)
fn clear_old_activities(conn: &mut PgConnection) {
use diesel::dsl::*;
use lemmy_db_schema::schema::activity::dsl::*;
info!("Clearing old activities...");
diesel::delete(activity.filter(published.lt(now - 6.months())))
.execute(conn)
.expect("clear old activities");
info!("Done.");
}
/// Re-calculate the site and community active counts every 12 hours
fn active_counts(conn: &mut PgConnection) {
info!("Updating active site and community aggregates ...");
let intervals = vec![
("1 day", "day"),
("1 week", "week"),
("1 month", "month"),
("6 months", "half_year"),
];
for i in &intervals {
let update_site_stmt = format!(
"update site_aggregates set users_active_{} = (select * from site_aggregates_activity('{}'))",
i.1, i.0
);
sql_query(update_site_stmt)
.execute(conn)
.expect("update site stats");
let update_community_stmt = format!("update community_aggregates ca set users_active_{} = mv.count_ from community_aggregates_activity('{}') mv where ca.community_id = mv.community_id_", i.1, i.0);
sql_query(update_community_stmt)
.execute(conn)
.expect("update community stats");
}
info!("Done.");
}
/// Set banned to false after ban expires
fn update_banned_when_expired(conn: &mut PgConnection) {
info!("Updating banned column if it expires ...");
let update_ban_expires_stmt =
"update person set banned = false where banned = true and ban_expires < now()";
sql_query(update_ban_expires_stmt)
.execute(conn)
.expect("update banned when expires");
}
/// Drops the phantom CCNEW indexes created by postgres
/// https://github.com/LemmyNet/lemmy/issues/2431
fn drop_ccnew_indexes(conn: &mut PgConnection) {
info!("Dropping phantom ccnew indexes...");
let drop_stmt = "select drop_ccnew_indexes()";
sql_query(drop_stmt)
.execute(conn)
.expect("drop ccnew indexes");
}