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mod.rs
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mod.rs
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use super::config;
use super::errors::*;
use super::esi;
use super::grpc;
use super::universe;
use super::store;
use std::process;
use std::thread;
use std::time;
use std::time::Instant;
use chan;
use ctrlc;
use fnv::FnvHashMap;
use super::esi::types::*;
use chrono::prelude::*;
use chrono::Duration;
use rand::{thread_rng, Rng};
use super::errors;
pub fn run(config: config::Config) -> Result<()> {
debug!("{:?}", config);
// oAuth context, independent of client so different identities are supported
let context = esi::OAuthContext::new(config.client_id, config.secret_key, config.refresh_token);
// Main shared ESI client using default oAuth context
let client = esi::Client::new(context);
// Store instance for storing orders
let order_store = store::Store::new()?;
// Universe instance holding map-data and structure blacklists
let uni = universe::Universe::new(client.clone())?;
// Start scheduling region updates
start_schedule_loop(client, uni.clone(), order_store.clone());
let cloned_store = order_store.clone();
// Gracefully handle process termination
ctrlc::set_handler(move || {
warn!("Received shutdown signal. Saving caches...");
match uni.persist_blacklist() {
Ok(_) => {}
Err(e) => {
warn!("Saving blacklist to disk failed: {}", e)
}
}
match cloned_store.persist_store() {
Ok(_) => {}
Err(e) => {
warn!("Saving store to disk failed: {}", e)
}
}
warn!("Done, bye!");
process::exit(0);
}).expect("Error setting shutdown handler!");
// Launch gRPC server
grpc::run_server(order_store.clone(), config.grpc_host);
Ok(())
}
/// Control scraping of regions in regular intervals
fn start_schedule_loop(client: esi::Client, uni: universe::Universe, order_store: store::Store) {
thread::spawn(move || {
// Build initial schedule
let regions = uni.get_market_regions();
let mut schedule: FnvHashMap<RegionID, DateTime<Utc>> = FnvHashMap::default();
let mut rng = thread_rng();
for region in regions {
let random: i64 = rng.gen_range(0, 300);
let random_time = Utc::now() + Duration::seconds(random);
schedule.insert(region, random_time);
}
let region_update = chan::tick_ms(60 * 60 * 1_000); // hourly (backend refreshes daily)
let run_regions = chan::tick_ms(200); // Five times per second
let (send_reschedule, receive_reschedule) = chan::async::<(RegionID, DateTime<Utc>)>();
loop {
chan_select! {
region_update.recv() => {
let regions = uni.get_market_regions();
for region in regions {
let random: i64 = rng.gen_range(0, 300);
let random_time = Utc::now() + Duration::seconds(random);
schedule.entry(region).or_insert(random_time);
}
},
run_regions.recv() => {
let now = Utc::now();
let mut fetch: Vec<RegionID> = Vec::new();
for (region, time) in &schedule {
if time < &now {
fetch.push(*region);
}
}
for region in fetch {
// Run in 10 minutes unless re-scheduled by self
schedule.insert(region, now + Duration::seconds(300));
update_region(region, client.clone(), uni.clone(), order_store.clone(), send_reschedule.clone());
}
},
receive_reschedule.recv() -> data => {
if data.is_some() {
let (region_id, run_at) = data.unwrap();
schedule.insert(region_id, run_at);
}
},
}
}
});
}
/// Download and store a region's market
/// It works like this (for regions/structures):
/// Spawn thread per region -> get metadata -> spawn thread per page
fn update_region(region_id: RegionID, client: esi::Client, uni: universe::Universe, mut order_store: store::Store, reschedule_channel: chan::Sender<(RegionID, DateTime<Utc>)>) -> thread::JoinHandle<Result<store::UpdateResult>> {
thread::spawn(move || {
let before_download = Instant::now();
let orders = match download_region(region_id, client, uni, reschedule_channel) {
Ok(result) => {
result
},
Err(e) => {
warn!("Could not download region {}: {}", region_id, e);
for e in e.iter().skip(1) {
warn!("caused by: {}", e);
}
bail!(e);
}
};
let after_download = Instant::now();
let before_store = Instant::now();
let r = order_store.store_region(®ion_id, orders);
let after_store = Instant::now();
let dd = after_download.duration_since(before_download);
let download_time_ms = (dd.as_secs() * 1_000) + u64::from(dd.subsec_nanos() / 1_000_000);
let sd = after_store.duration_since(before_store);
let store_time_ms = (sd.as_secs() * 1_000) + u64::from(sd.subsec_nanos() / 1_000_000);
info!("{:8} - New: {:6}\tUpdated: {:6}\tClosed: {:6}\tUnaffected: {:6}\tAffected RegionTypes: {:6}\tDownload: {:5}ms\tStore: {:5}ms", region_id, r.new.len(), r.updated.len(), r.closed.len(), r.unaffected.len(), r.region_types.len(), download_time_ms, store_time_ms);
Ok(r)
})
}
/// Download market data of a region
fn download_region(region_id: RegionID, client: esi::Client, uni: universe::Universe, reschedule_channel: chan::Sender<(RegionID, DateTime<Utc>)>) -> Result<store::TaggedOrderVec> {
// Collect thread's handles for later joins
// It needs mutable access to the client because of auth and to uni because of the blacklists
let structure_handle = download_region_structures(region_id, client.clone(), uni);
let region_handle = download_region_market(region_id, client, reschedule_channel);
let mut orders: store::TaggedOrderVec = Vec::new();
// Unwrap thread panics
let structure_result = structure_handle.join().unwrap();
let region_result = region_handle.join().unwrap();
// Unwrap data
let mut orders_structure = structure_result?;
let mut orders_region = region_result?;
// Append and return data
orders.append(&mut orders_structure);
orders.append(&mut orders_region);
Ok(orders)
}
/// Download region metadata and spawn page threads
fn download_region_market(region_id: RegionID, client: esi::Client, reschedule_channel: chan::Sender<(RegionID, DateTime<Utc>)>) -> thread::JoinHandle<Result<store::TaggedOrderVec>> {
thread::spawn(move || {
// Todo: Retry
let metadata = client.get_orders_metadata(region_id)?;
// Re-schedule self with 3 second safety-margin
reschedule_channel.send((region_id, metadata.expires + Duration::seconds(3)));
// Spawn threads for pages
let mut page_handles: Vec<thread::JoinHandle<Result<Vec<Order>>>> = Vec::new();
for page in 1..(metadata.pages+1) {
let handle = download_region_market_page(region_id, client.clone(), page);
page_handles.push(handle);
}
// Collect results
let mut orders: store::TaggedOrderVec = Vec::new();
for handle in page_handles {
// Unpack thread panic
let thread_result = handle.join().unwrap();
// Unpack thread result
let pages = thread_result?;
for order in pages {
orders.push((order, metadata.last_modified));
}
}
Ok(orders)
})
}
/// Download region page (retry 3 times)
fn download_region_market_page(region_id: RegionID, client: esi::Client, page: u32) -> thread::JoinHandle<Result<Vec<Order>>> {
thread::spawn(move || {
let mut tries_remaining = 3;
let mut data: Result<Vec<Order>> = Ok(Vec::new());
while tries_remaining > 0 {
tries_remaining -= 1;
data = client.get_orders(region_id, page);
if data.is_ok() {
break
}
thread::sleep(time::Duration::from_millis(1_000));
}
data
})
}
/// Download market data for all of a region's structures
fn download_region_structures(region_id: RegionID, client: esi::Client, uni: universe::Universe) -> thread::JoinHandle<Result<store::TaggedOrderVec>> {
thread::spawn(move || {
let structure_ids = uni.get_public_structures_in_region(region_id);
let mut orders: store::TaggedOrderVec = Vec::new();
if structure_ids.is_some() {
let mut structure_handles: Vec<thread::JoinHandle<Result<store::TaggedOrderVec>>> = Vec::new();
for structure in structure_ids.unwrap() {
let handle = download_structure(structure, client.clone(), uni.clone());
structure_handles.push(handle);
}
// Collect results
for handle in structure_handles {
// Unpack thread panic
let thread_result = handle.join().unwrap();
// Unpack thread result
let mut structure_orders = thread_result?;
orders.append(&mut structure_orders);
}
}
Ok(orders)
})
}
/// Download structure metadata and spawn page threads
fn download_structure(structure_id: LocationID, mut client: esi::Client, uni: universe::Universe) -> thread::JoinHandle<Result<store::TaggedOrderVec>> {
thread::spawn(move || {
// Todo: Retry
let metadata_result = client.get_orders_structure_metadata(structure_id);
let metadata = match metadata_result {
Ok(metadata) => metadata,
Err(e) => {
// If we got forbidden, blacklist structure and return empty list. On all other errors bail.
if let errors::ErrorKind::HTTPForbiddenError(ref _e) = *e.kind() {
uni.blacklist_structure(structure_id);
debug!("Blacklisted structure {}.", structure_id);
// Return empty list
return Ok(Vec::new());
}
bail!(e);
}
};
// Spawn threads for pages
let mut page_handles: Vec<thread::JoinHandle<Result<Vec<Order>>>> = Vec::new();
for page in 1..(metadata.pages+1) {
let handle = download_structure_page(structure_id, client.clone(), page);
page_handles.push(handle);
}
let mut orders: store::TaggedOrderVec = Vec::new();
for handle in page_handles {
// Unpack thread panic
let thread_result = handle.join().unwrap();
// Unpack thread result
let pages = thread_result?;
for order in pages {
orders.push((order, metadata.last_modified));
}
}
Ok(orders)
})
}
/// Download structure pages (retry 3 times)
fn download_structure_page(structure_id: LocationID, mut client: esi::Client, page: u32) -> thread::JoinHandle<Result<Vec<Order>>> {
thread::spawn(move || {
let mut tries_remaining = 3;
let mut data: Result<Vec<Order>> = Ok(Vec::new());
while tries_remaining > 0 {
tries_remaining -= 1;
data = client.get_structure_orders(structure_id, page);
if data.is_ok() {
break
}
thread::sleep(time::Duration::from_millis(1_000));
}
data
})
}