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move inboxes logic to separete file

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This commit is contained in:
Felix Ableitner 2024-05-28 10:57:55 +02:00
parent fd6a1283a5
commit 43bc4c4536
3 changed files with 171 additions and 134 deletions
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150
crates/federate/src/inboxes.rs Normal file
View file

@ -0,0 +1,150 @@
use crate::util::LEMMY_TEST_FAST_FEDERATION;
use chrono::{DateTime, TimeZone, Utc};
use lemmy_api_common::context::LemmyContext;
use lemmy_db_schema::{
newtypes::CommunityId,
source::{activity::SentActivity, instance::Instance, site::Site},
};
use lemmy_db_views_actor::structs::CommunityFollowerView;
use lemmy_utils::error::LemmyResult;
use once_cell::sync::Lazy;
use reqwest::Url;
use std::collections::{HashMap, HashSet};
/// interval with which new additions to community_followers are queried.
///
/// The first time some user on an instance follows a specific remote community (or, more precisely:
/// the first time a (followed_community_id, follower_inbox_url) tuple appears), this delay limits
/// the maximum time until the follow actually results in activities from that community id being
/// sent to that inbox url. This delay currently needs to not be too small because the DB load is
/// currently fairly high because of the current structure of storing inboxes for every person, not
/// having a separate list of shared_inboxes, and the architecture of having every instance queue be
/// fully separate. (see https://github.com/LemmyNet/lemmy/issues/3958)
static FOLLOW_ADDITIONS_RECHECK_DELAY: Lazy<chrono::TimeDelta> = Lazy::new(|| {
if *LEMMY_TEST_FAST_FEDERATION {
chrono::TimeDelta::try_seconds(1).expect("TimeDelta out of bounds")
} else {
chrono::TimeDelta::try_minutes(2).expect("TimeDelta out of bounds")
}
});
/// The same as FOLLOW_ADDITIONS_RECHECK_DELAY, but triggering when the last person on an instance
/// unfollows a specific remote community. This is expected to happen pretty rarely and updating it
/// in a timely manner is not too important.
static FOLLOW_REMOVALS_RECHECK_DELAY: Lazy<chrono::TimeDelta> =
Lazy::new(|| chrono::TimeDelta::try_hours(1).expect("TimeDelta out of bounds"));
pub(crate) struct CommunityInboxCollector {
instance: Instance,
// load site lazily because if an instance is first seen due to being on allowlist,
// the corresponding row in `site` may not exist yet since that is only added once
// `fetch_instance_actor_for_object` is called.
// (this should be unlikely to be relevant outside of the federation tests)
// TODO: use lazy
site_loaded: bool,
site: Option<Site>,
followed_communities: HashMap<CommunityId, HashSet<Url>>,
last_communities_fetch_full: DateTime<Utc>,
last_communities_fetch_incr: DateTime<Utc>,
}
impl CommunityInboxCollector {
pub fn new(instance: Instance) -> Self {
Self {
instance,
site_loaded: false,
site: None,
followed_communities: HashMap::new(),
last_communities_fetch_full: Utc.timestamp_nanos(0),
last_communities_fetch_incr: Utc.timestamp_nanos(0),
}
}
/// get inbox urls of sending the given activity to the given instance
/// most often this will return 0 values (if instance doesn't care about the activity)
/// or 1 value (the shared inbox)
/// > 1 values only happens for non-lemmy software
pub async fn get_inbox_urls(
&mut self,
activity: &SentActivity,
context: &LemmyContext,
) -> LemmyResult<HashSet<Url>> {
let mut inbox_urls: HashSet<Url> = HashSet::new();
if activity.send_all_instances {
if !self.site_loaded {
self.site = Site::read_from_instance_id(&mut context.pool(), self.instance.id).await?;
self.site_loaded = true;
}
if let Some(site) = &self.site {
// Nutomic: Most non-lemmy software wont have a site row. That means it cant handle these
// activities. So handling it like this is fine.
inbox_urls.insert(site.inbox_url.inner().clone());
}
}
if let Some(t) = &activity.send_community_followers_of {
if let Some(urls) = self.followed_communities.get(t) {
inbox_urls.extend(urls.iter().cloned());
}
}
inbox_urls.extend(
activity
.send_inboxes
.iter()
.filter_map(std::option::Option::as_ref)
.filter(|&u| (u.domain() == Some(&self.instance.domain)))
.map(|u| u.inner().clone()),
);
Ok(inbox_urls)
}
pub async fn update_communities(&mut self, context: &LemmyContext) -> LemmyResult<()> {
// update to time before fetch to ensure overlap. subtract 10s to ensure overlap even if
// published date is not exact
let updated_fetch =
Utc::now() - chrono::TimeDelta::try_seconds(10).expect("TimeDelta out of bounds");
let full_fetch = Utc::now() - self.last_communities_fetch_full;
if full_fetch > *FOLLOW_REMOVALS_RECHECK_DELAY {
// process removals every hour
self.followed_communities = self
.get_communities(Utc.timestamp_nanos(0), context)
.await?;
self.last_communities_fetch_full = updated_fetch;
self.last_communities_fetch_incr = self.last_communities_fetch_full;
}
let incr_fetch = Utc::now() - self.last_communities_fetch_incr;
if incr_fetch > *FOLLOW_ADDITIONS_RECHECK_DELAY {
// process additions every minute
let added = self
.get_communities(self.last_communities_fetch_incr, context)
.await?;
self.followed_communities.extend(added);
self.last_communities_fetch_incr = updated_fetch;
}
Ok(())
}
/// get a list of local communities with the remote inboxes on the given instance that cares about
/// them
async fn get_communities(
&mut self,
last_fetch: DateTime<Utc>,
context: &LemmyContext,
) -> LemmyResult<HashMap<CommunityId, HashSet<Url>>> {
let followed = CommunityFollowerView::get_instance_followed_community_inboxes(
&mut context.pool(),
self.instance.id,
last_fetch,
)
.await?;
Ok(
followed
.into_iter()
.fold(HashMap::new(), |mut map, (c, u)| {
map.entry(c).or_default().insert(u.into());
map
}),
)
}
}

1
crates/federate/src/lib.rs
View file

@ -16,6 +16,7 @@ use tokio::{
use tokio_util::sync::CancellationToken;
use tracing::info;
mod inboxes;
mod stats;
mod util;
mod worker;

146
crates/federate/src/worker.rs
View file

@ -1,9 +1,11 @@
use crate::util::{
use crate::{
inboxes::CommunityInboxCollector,
util::{
get_activity_cached,
get_actor_cached,
get_latest_activity_id,
LEMMY_TEST_FAST_FEDERATION,
WORK_FINISHED_RECHECK_DELAY,
},
};
use activitypub_federation::{
activity_sending::SendActivityTask,
@ -15,20 +17,16 @@ use chrono::{DateTime, Days, TimeZone, Utc};
use lemmy_api_common::{context::LemmyContext, federate_retry_sleep_duration};
use lemmy_apub::{activity_lists::SharedInboxActivities, FEDERATION_CONTEXT};
use lemmy_db_schema::{
newtypes::{ActivityId, CommunityId, InstanceId},
newtypes::{ActivityId, InstanceId},
source::{
activity::SentActivity,
federation_queue_state::FederationQueueState,
instance::{Instance, InstanceForm},
site::Site,
},
utils::naive_now,
};
use lemmy_db_views_actor::structs::CommunityFollowerView;
use once_cell::sync::Lazy;
use reqwest::Url;
use lemmy_utils::error::LemmyResult;
use std::{
collections::{HashMap, HashSet},
ops::{Add, Deref},
time::Duration,
};
@ -43,41 +41,13 @@ static CHECK_SAVE_STATE_EVERY_IT: i64 = 100;
/// Save state to db after this time has passed since the last state (so if the server crashes or is
/// SIGKILLed, less than X seconds of activities are resent)
static SAVE_STATE_EVERY_TIME: Duration = Duration::from_secs(60);
/// interval with which new additions to community_followers are queried.
///
/// The first time some user on an instance follows a specific remote community (or, more precisely:
/// the first time a (followed_community_id, follower_inbox_url) tuple appears), this delay limits
/// the maximum time until the follow actually results in activities from that community id being
/// sent to that inbox url. This delay currently needs to not be too small because the DB load is
/// currently fairly high because of the current structure of storing inboxes for every person, not
/// having a separate list of shared_inboxes, and the architecture of having every instance queue be
/// fully separate. (see https://github.com/LemmyNet/lemmy/issues/3958)
static FOLLOW_ADDITIONS_RECHECK_DELAY: Lazy<chrono::TimeDelta> = Lazy::new(|| {
if *LEMMY_TEST_FAST_FEDERATION {
chrono::TimeDelta::try_seconds(1).expect("TimeDelta out of bounds")
} else {
chrono::TimeDelta::try_minutes(2).expect("TimeDelta out of bounds")
}
});
/// The same as FOLLOW_ADDITIONS_RECHECK_DELAY, but triggering when the last person on an instance
/// unfollows a specific remote community. This is expected to happen pretty rarely and updating it
/// in a timely manner is not too important.
static FOLLOW_REMOVALS_RECHECK_DELAY: Lazy<chrono::TimeDelta> =
Lazy::new(|| chrono::TimeDelta::try_hours(1).expect("TimeDelta out of bounds"));
pub(crate) struct InstanceWorker {
instance: Instance,
// load site lazily because if an instance is first seen due to being on allowlist,
// the corresponding row in `site` may not exist yet since that is only added once
// `fetch_instance_actor_for_object` is called.
// (this should be unlikely to be relevant outside of the federation tests)
site_loaded: bool,
site: Option<Site>,
followed_communities: HashMap<CommunityId, HashSet<Url>>,
inboxes: CommunityInboxCollector,
stop: CancellationToken,
context: Data<LemmyContext>,
stats_sender: UnboundedSender<(InstanceId, FederationQueueState)>,
last_full_communities_fetch: DateTime<Utc>,
last_incremental_communities_fetch: DateTime<Utc>,
state: FederationQueueState,
last_state_insert: DateTime<Utc>,
}
@ -88,19 +58,16 @@ impl InstanceWorker {
context: Data<LemmyContext>,
stop: CancellationToken,
stats_sender: UnboundedSender<(InstanceId, FederationQueueState)>,
) -> Result<(), anyhow::Error> {
) -> LemmyResult<()> {
let mut pool = context.pool();
let state = FederationQueueState::load(&mut pool, instance.id).await?;
let inboxes = CommunityInboxCollector::new(instance.clone());
let mut worker = InstanceWorker {
instance,
site_loaded: false,
site: None,
followed_communities: HashMap::new(),
inboxes,
stop,
context,
stats_sender,
last_full_communities_fetch: Utc.timestamp_nanos(0),
last_incremental_communities_fetch: Utc.timestamp_nanos(0),
state,
last_state_insert: Utc.timestamp_nanos(0),
};
@ -109,11 +76,11 @@ impl InstanceWorker {
/// loop fetch new activities from db and send them to the inboxes of the given instances
/// this worker only returns if (a) there is an internal error or (b) the cancellation token is
/// cancelled (graceful exit)
pub(crate) async fn loop_until_stopped(&mut self) -> Result<(), anyhow::Error> {
pub(crate) async fn loop_until_stopped(&mut self) -> LemmyResult<()> {
debug!("Starting federation worker for {}", self.instance.domain);
let save_state_every = chrono::Duration::from_std(SAVE_STATE_EVERY_TIME).expect("not negative");
self.update_communities().await?;
self.inboxes.update_communities(&self.context).await?;
self.initial_fail_sleep().await?;
while !self.stop.is_cancelled() {
self.loop_batch().await?;
@ -123,7 +90,7 @@ impl InstanceWorker {
if (Utc::now() - self.last_state_insert) > save_state_every {
self.save_and_send_state().await?;
}
self.update_communities().await?;
self.inboxes.update_communities(&self.context).await?;
}
// final update of state in db
self.save_and_send_state().await?;
@ -211,11 +178,8 @@ impl InstanceWorker {
&mut self,
activity: &SentActivity,
object: &SharedInboxActivities,
) -> Result<()> {
let inbox_urls = self
.get_inbox_urls(activity)
.await
.context("failed figuring out inbox urls")?;
) -> LemmyResult<()> {
let inbox_urls = self.inboxes.get_inbox_urls(activity, &self.context).await?;
if inbox_urls.is_empty() {
trace!("{}: {:?} no inboxes", self.instance.domain, activity.id);
self.state.last_successful_id = Some(activity.id);
@ -269,84 +233,6 @@ impl InstanceWorker {
Ok(())
}
/// get inbox urls of sending the given activity to the given instance
/// most often this will return 0 values (if instance doesn't care about the activity)
/// or 1 value (the shared inbox)
/// > 1 values only happens for non-lemmy software
async fn get_inbox_urls(&mut self, activity: &SentActivity) -> Result<HashSet<Url>> {
let mut inbox_urls: HashSet<Url> = HashSet::new();
if activity.send_all_instances {
if !self.site_loaded {
self.site = Site::read_from_instance_id(&mut self.context.pool(), self.instance.id).await?;
self.site_loaded = true;
}
if let Some(site) = &self.site {
// Nutomic: Most non-lemmy software wont have a site row. That means it cant handle these
// activities. So handling it like this is fine.
inbox_urls.insert(site.inbox_url.inner().clone());
}
}
if let Some(t) = &activity.send_community_followers_of {
if let Some(urls) = self.followed_communities.get(t) {
inbox_urls.extend(urls.iter().cloned());
}
}
inbox_urls.extend(
activity
.send_inboxes
.iter()
.filter_map(std::option::Option::as_ref)
.filter(|&u| (u.domain() == Some(&self.instance.domain)))
.map(|u| u.inner().clone()),
);
Ok(inbox_urls)
}
async fn update_communities(&mut self) -> Result<()> {
if (Utc::now() - self.last_full_communities_fetch) > *FOLLOW_REMOVALS_RECHECK_DELAY {
// process removals every hour
(self.followed_communities, self.last_full_communities_fetch) = self
.get_communities(self.instance.id, Utc.timestamp_nanos(0))
.await?;
self.last_incremental_communities_fetch = self.last_full_communities_fetch;
}
if (Utc::now() - self.last_incremental_communities_fetch) > *FOLLOW_ADDITIONS_RECHECK_DELAY {
// process additions every minute
let (news, time) = self
.get_communities(self.instance.id, self.last_incremental_communities_fetch)
.await?;
self.followed_communities.extend(news);
self.last_incremental_communities_fetch = time;
}
Ok(())
}
/// get a list of local communities with the remote inboxes on the given instance that cares about
/// them
async fn get_communities(
&mut self,
instance_id: InstanceId,
last_fetch: DateTime<Utc>,
) -> Result<(HashMap<CommunityId, HashSet<Url>>, DateTime<Utc>)> {
let new_last_fetch =
Utc::now() - chrono::TimeDelta::try_seconds(10).expect("TimeDelta out of bounds"); // update to time before fetch to ensure overlap. subtract 10s to ensure overlap even if
// published date is not exact
Ok((
CommunityFollowerView::get_instance_followed_community_inboxes(
&mut self.context.pool(),
instance_id,
last_fetch,
)
.await?
.into_iter()
.fold(HashMap::new(), |mut map, (c, u)| {
map.entry(c).or_default().insert(u.into());
map
}),
new_last_fetch,
))
}
async fn save_and_send_state(&mut self) -> Result<()> {
self.last_state_insert = Utc::now();
FederationQueueState::upsert(&mut self.context.pool(), &self.state).await?;