+use chrono::NaiveDateTime;
use clokwerk::{Scheduler, TimeUnits as CTimeUnits};
use diesel::{
dsl::{now, IntervalDsl},
+ sql_types::{Integer, Timestamp},
Connection,
ExpressionMethods,
+ NullableExpressionMethods,
QueryDsl,
+ QueryableByName,
};
// Import week days and WeekDay
use diesel::{sql_query, PgConnection, RunQueryDsl};
use lemmy_api_common::context::LemmyContext;
use lemmy_db_schema::{
- schema::{
- activity,
- comment_aggregates,
- community_aggregates,
- community_person_ban,
- instance,
- person,
- post_aggregates,
- },
+ schema::{activity, captcha_answer, comment, community_person_ban, instance, person, post},
source::instance::{Instance, InstanceForm},
- utils::{functions::hot_rank, naive_now},
+ utils::{naive_now, DELETED_REPLACEMENT_TEXT},
};
use lemmy_routes::nodeinfo::NodeInfo;
-use lemmy_utils::{error::LemmyError, REQWEST_TIMEOUT};
+use lemmy_utils::{
+ error::{LemmyError, LemmyResult},
+ REQWEST_TIMEOUT,
+};
use reqwest::blocking::Client;
use std::{thread, time::Duration};
-use tracing::{error, info};
+use tracing::{error, info, warn};
/// Schedules various cleanup tasks for lemmy in a background thread
pub fn setup(
update_banned_when_expired(&mut conn);
});
- // Update hot ranks every 5 minutes
+ // Update hot ranks every 15 minutes
let url = db_url.clone();
- scheduler.every(CTimeUnits::minutes(5)).run(move || {
+ scheduler.every(CTimeUnits::minutes(15)).run(move || {
let mut conn = PgConnection::establish(&url).expect("could not establish connection");
update_hot_ranks(&mut conn, true);
});
+ // Delete any captcha answers older than ten minutes, every ten minutes
+ let url = db_url.clone();
+ scheduler.every(CTimeUnits::minutes(10)).run(move || {
+ let mut conn = PgConnection::establish(&url).expect("could not establish connection");
+ delete_expired_captcha_answers(&mut conn);
+ });
+
// Clear old activities every week
let url = db_url.clone();
scheduler.every(CTimeUnits::weeks(1)).run(move || {
context_1.settings_updated_channel().remove_older_than(hour);
});
+ // Overwrite deleted & removed posts and comments every day
+ let url = db_url.clone();
+ scheduler.every(CTimeUnits::days(1)).run(move || {
+ let mut conn = PgConnection::establish(&url).expect("could not establish connection");
+ overwrite_deleted_posts_and_comments(&mut conn);
+ });
+
// Update the Instance Software
scheduler.every(CTimeUnits::days(1)).run(move || {
let mut conn = PgConnection::establish(&db_url).expect("could not establish connection");
- update_instance_software(&mut conn, &user_agent);
+ update_instance_software(&mut conn, &user_agent)
+ .map_err(|e| warn!("Failed to update instance software: {e}"))
+ .ok();
});
// Manually run the scheduler in an event loop
update_hot_ranks(&mut conn, false);
update_banned_when_expired(&mut conn);
clear_old_activities(&mut conn);
+ overwrite_deleted_posts_and_comments(&mut conn);
}
/// Update the hot_rank columns for the aggregates tables
+/// Runs in batches until all necessary rows are updated once
fn update_hot_ranks(conn: &mut PgConnection, last_week_only: bool) {
- let mut post_update = diesel::update(post_aggregates::table).into_boxed();
- let mut comment_update = diesel::update(comment_aggregates::table).into_boxed();
- let mut community_update = diesel::update(community_aggregates::table).into_boxed();
-
- // Only update for the last week of content
- if last_week_only {
+ let process_start_time = if last_week_only {
info!("Updating hot ranks for last week...");
- let last_week = now - diesel::dsl::IntervalDsl::weeks(1);
-
- post_update = post_update.filter(post_aggregates::published.gt(last_week));
- comment_update = comment_update.filter(comment_aggregates::published.gt(last_week));
- community_update = community_update.filter(community_aggregates::published.gt(last_week));
+ naive_now() - chrono::Duration::days(7)
} else {
info!("Updating hot ranks for all history...");
- }
+ NaiveDateTime::from_timestamp_opt(0, 0).expect("0 timestamp creation")
+ };
+
+ process_hot_ranks_in_batches(
+ conn,
+ "post_aggregates",
+ "SET hot_rank = hot_rank(a.score, a.published),
+ hot_rank_active = hot_rank(a.score, a.newest_comment_time_necro)",
+ process_start_time,
+ );
+
+ process_hot_ranks_in_batches(
+ conn,
+ "comment_aggregates",
+ "SET hot_rank = hot_rank(a.score, a.published)",
+ process_start_time,
+ );
+
+ process_hot_ranks_in_batches(
+ conn,
+ "community_aggregates",
+ "SET hot_rank = hot_rank(a.subscribers, a.published)",
+ process_start_time,
+ );
+
+ info!("Finished hot ranks update!");
+}
+
+#[derive(QueryableByName)]
+struct HotRanksUpdateResult {
+ #[diesel(sql_type = Timestamp)]
+ published: NaiveDateTime,
+}
- match post_update
- .set((
- post_aggregates::hot_rank.eq(hot_rank(post_aggregates::score, post_aggregates::published)),
- post_aggregates::hot_rank_active.eq(hot_rank(
- post_aggregates::score,
- post_aggregates::newest_comment_time_necro,
- )),
+/// Runs the hot rank update query in batches until all rows after `process_start_time` have been
+/// processed.
+/// In `set_clause`, "a" will refer to the current aggregates table.
+/// Locked rows are skipped in order to prevent deadlocks (they will likely get updated on the next
+/// run)
+fn process_hot_ranks_in_batches(
+ conn: &mut PgConnection,
+ table_name: &str,
+ set_clause: &str,
+ process_start_time: NaiveDateTime,
+) {
+ let update_batch_size = 1000; // Bigger batches than this tend to cause seq scans
+ let mut previous_batch_result = Some(process_start_time);
+ while let Some(previous_batch_last_published) = previous_batch_result {
+ // Raw `sql_query` is used as a performance optimization - Diesel does not support doing this
+ // in a single query (neither as a CTE, nor using a subquery)
+ let result = sql_query(format!(
+ r#"WITH batch AS (SELECT a.id
+ FROM {aggregates_table} a
+ WHERE a.published > $1
+ ORDER BY a.published
+ LIMIT $2
+ FOR UPDATE SKIP LOCKED)
+ UPDATE {aggregates_table} a {set_clause}
+ FROM batch WHERE a.id = batch.id RETURNING a.published;
+ "#,
+ aggregates_table = table_name,
+ set_clause = set_clause
))
- .execute(conn)
- {
- Ok(_) => {}
- Err(e) => {
- error!("Failed to update post_aggregates hot_ranks: {}", e)
- }
- }
+ .bind::<Timestamp, _>(previous_batch_last_published)
+ .bind::<Integer, _>(update_batch_size)
+ .get_results::<HotRanksUpdateResult>(conn);
- match comment_update
- .set(comment_aggregates::hot_rank.eq(hot_rank(
- comment_aggregates::score,
- comment_aggregates::published,
- )))
- .execute(conn)
- {
- Ok(_) => {}
- Err(e) => {
- error!("Failed to update comment_aggregates hot_ranks: {}", e)
+ match result {
+ Ok(updated_rows) => previous_batch_result = updated_rows.last().map(|row| row.published),
+ Err(e) => {
+ error!("Failed to update {} hot_ranks: {}", table_name, e);
+ break;
+ }
}
}
+ info!(
+ "Finished process_hot_ranks_in_batches execution for {}",
+ table_name
+ );
+}
- match community_update
- .set(community_aggregates::hot_rank.eq(hot_rank(
- community_aggregates::subscribers,
- community_aggregates::published,
- )))
- .execute(conn)
+fn delete_expired_captcha_answers(conn: &mut PgConnection) {
+ match diesel::delete(
+ captcha_answer::table.filter(captcha_answer::published.lt(now - IntervalDsl::minutes(10))),
+ )
+ .execute(conn)
{
Ok(_) => {
info!("Done.");
}
Err(e) => {
- error!("Failed to update community_aggregates hot_ranks: {}", e)
+ error!("Failed to clear old captcha answers: {}", e)
}
}
}
}
}
+/// overwrite posts and comments 30d after deletion
+fn overwrite_deleted_posts_and_comments(conn: &mut PgConnection) {
+ info!("Overwriting deleted posts...");
+ match diesel::update(
+ post::table
+ .filter(post::deleted.eq(true))
+ .filter(post::updated.lt(now.nullable() - 1.months()))
+ .filter(post::body.ne(DELETED_REPLACEMENT_TEXT)),
+ )
+ .set((
+ post::body.eq(DELETED_REPLACEMENT_TEXT),
+ post::name.eq(DELETED_REPLACEMENT_TEXT),
+ ))
+ .execute(conn)
+ {
+ Ok(_) => {
+ info!("Done.");
+ }
+ Err(e) => {
+ error!("Failed to overwrite deleted posts: {}", e)
+ }
+ }
+
+ info!("Overwriting deleted comments...");
+ match diesel::update(
+ comment::table
+ .filter(comment::deleted.eq(true))
+ .filter(comment::updated.lt(now.nullable() - 1.months()))
+ .filter(comment::content.ne(DELETED_REPLACEMENT_TEXT)),
+ )
+ .set(comment::content.eq(DELETED_REPLACEMENT_TEXT))
+ .execute(conn)
+ {
+ Ok(_) => {
+ info!("Done.");
+ }
+ Err(e) => {
+ error!("Failed to overwrite deleted comments: {}", e)
+ }
+ }
+}
+
/// Re-calculate the site and community active counts every 12 hours
fn active_counts(conn: &mut PgConnection) {
info!("Updating active site and community aggregates ...");
for i in &intervals {
let update_site_stmt = format!(
- "update site_aggregates set users_active_{} = (select * from site_aggregates_activity('{}'))",
+ "update site_aggregates set users_active_{} = (select * from site_aggregates_activity('{}')) where site_id = 1",
i.1, i.0
);
match sql_query(update_site_stmt).execute(conn) {
}
/// Updates the instance software and version
-fn update_instance_software(conn: &mut PgConnection, user_agent: &str) {
+///
+/// TODO: this should be async
+/// TODO: if instance has been dead for a long time, it should be checked less frequently
+fn update_instance_software(conn: &mut PgConnection, user_agent: &str) -> LemmyResult<()> {
info!("Updating instances software and versions...");
- let client = match Client::builder()
+ let client = Client::builder()
.user_agent(user_agent)
.timeout(REQWEST_TIMEOUT)
- .build()
- {
- Ok(client) => client,
- Err(e) => {
- error!("Failed to build reqwest client: {}", e);
- return;
- }
- };
+ .build()?;
- let instances = match instance::table.get_results::<Instance>(conn) {
- Ok(instances) => instances,
- Err(e) => {
- error!("Failed to get instances: {}", e);
- return;
- }
- };
+ let instances = instance::table.get_results::<Instance>(conn)?;
for instance in instances {
let node_info_url = format!("https://{}/nodeinfo/2.0.json", instance.domain);
- // Skip it if it can't connect
- let res = client
- .get(&node_info_url)
- .send()
- .ok()
- .and_then(|t| t.json::<NodeInfo>().ok());
-
- if let Some(node_info) = res {
- let software = node_info.software.as_ref();
- let form = InstanceForm::builder()
- .domain(instance.domain)
- .software(software.and_then(|s| s.name.clone()))
- .version(software.and_then(|s| s.version.clone()))
- .updated(Some(naive_now()))
- .build();
-
- match diesel::update(instance::table.find(instance.id))
- .set(form)
- .execute(conn)
- {
- Ok(_) => {
- info!("Done.");
+ // The `updated` column is used to check if instances are alive. If it is more than three days
+ // in the past, no outgoing activities will be sent to that instance. However not every
+ // Fediverse instance has a valid Nodeinfo endpoint (its not required for Activitypub). That's
+ // why we always need to mark instances as updated if they are alive.
+ let default_form = InstanceForm::builder()
+ .domain(instance.domain.clone())
+ .updated(Some(naive_now()))
+ .build();
+ let form = match client.get(&node_info_url).send() {
+ Ok(res) if res.status().is_client_error() => {
+ // Instance doesnt have nodeinfo but sent a response, consider it alive
+ Some(default_form)
+ }
+ Ok(res) => match res.json::<NodeInfo>() {
+ Ok(node_info) => {
+ // Instance sent valid nodeinfo, write it to db
+ Some(
+ InstanceForm::builder()
+ .domain(instance.domain)
+ .updated(Some(naive_now()))
+ .software(node_info.software.and_then(|s| s.name))
+ .version(node_info.version.clone())
+ .build(),
+ )
}
- Err(e) => {
- error!("Failed to update site instance software: {}", e);
- return;
+ Err(_) => {
+ // No valid nodeinfo but valid HTTP response, consider instance alive
+ Some(default_form)
}
+ },
+ Err(_) => {
+ // dead instance, do nothing
+ None
}
+ };
+ if let Some(form) = form {
+ diesel::update(instance::table.find(instance.id))
+ .set(form)
+ .execute(conn)?;
}
}
+ info!("Finished updating instances software and versions...");
+ Ok(())
}
#[cfg(test)]
projects / lemmy.git / blobdiff