209 lines
6.4 KiB
Rust
209 lines
6.4 KiB
Rust
//! The `streamer` module defines a set of services for efficiently pulling data from UDP sockets.
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//!
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use crate::packet::{Blob, Packets, PacketsRecycler, SharedBlobs, PACKETS_PER_BLOB};
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use crate::result::{Error, Result};
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use solana_sdk::timing::duration_as_ms;
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use std::net::UdpSocket;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::mpsc::{Receiver, RecvTimeoutError, Sender};
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use std::sync::Arc;
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use std::thread::{Builder, JoinHandle};
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use std::time::{Duration, Instant};
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pub type PacketReceiver = Receiver<Packets>;
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pub type PacketSender = Sender<Packets>;
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pub type BlobSender = Sender<SharedBlobs>;
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pub type BlobReceiver = Receiver<SharedBlobs>;
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fn recv_loop(
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sock: &UdpSocket,
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exit: Arc<AtomicBool>,
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channel: &PacketSender,
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recycler: &PacketsRecycler,
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name: &'static str,
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) -> Result<()> {
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loop {
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let mut msgs = Packets::new_with_recycler(recycler.clone(), PACKETS_PER_BLOB, name);
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loop {
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// Check for exit signal, even if socket is busy
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// (for instance the leader trasaction socket)
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if exit.load(Ordering::Relaxed) {
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return Ok(());
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}
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if let Ok(_len) = msgs.recv_from(sock) {
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channel.send(msgs)?;
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break;
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}
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}
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}
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}
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pub fn receiver(
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sock: Arc<UdpSocket>,
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exit: &Arc<AtomicBool>,
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packet_sender: PacketSender,
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recycler: PacketsRecycler,
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name: &'static str,
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) -> JoinHandle<()> {
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let res = sock.set_read_timeout(Some(Duration::new(1, 0)));
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if res.is_err() {
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panic!("streamer::receiver set_read_timeout error");
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}
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let exit = exit.clone();
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Builder::new()
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.name("solana-receiver".to_string())
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.spawn(move || {
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let _ = recv_loop(&sock, exit, &packet_sender, &recycler.clone(), name);
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})
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.unwrap()
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}
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fn recv_send(sock: &UdpSocket, r: &BlobReceiver) -> Result<()> {
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let timer = Duration::new(1, 0);
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let msgs = r.recv_timeout(timer)?;
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Blob::send_to(sock, msgs)?;
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Ok(())
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}
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pub fn recv_batch(recvr: &PacketReceiver, max_batch: usize) -> Result<(Vec<Packets>, usize, u64)> {
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let timer = Duration::new(1, 0);
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let msgs = recvr.recv_timeout(timer)?;
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let recv_start = Instant::now();
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trace!("got msgs");
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let mut len = msgs.packets.len();
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let mut batch = vec![msgs];
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while let Ok(more) = recvr.try_recv() {
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trace!("got more msgs");
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len += more.packets.len();
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batch.push(more);
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if len > max_batch {
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break;
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}
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}
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trace!("batch len {}", batch.len());
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Ok((batch, len, duration_as_ms(&recv_start.elapsed())))
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}
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pub fn responder(name: &'static str, sock: Arc<UdpSocket>, r: BlobReceiver) -> JoinHandle<()> {
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Builder::new()
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.name(format!("solana-responder-{}", name))
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.spawn(move || loop {
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if let Err(e) = recv_send(&sock, &r) {
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match e {
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Error::RecvTimeoutError(RecvTimeoutError::Disconnected) => break,
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Error::RecvTimeoutError(RecvTimeoutError::Timeout) => (),
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_ => warn!("{} responder error: {:?}", name, e),
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}
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}
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})
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.unwrap()
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}
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//TODO, we would need to stick block authentication before we create the
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//window.
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fn recv_blobs(sock: &UdpSocket, s: &BlobSender) -> Result<()> {
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trace!("recv_blobs: receiving on {}", sock.local_addr().unwrap());
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let dq = Blob::recv_from(sock)?;
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if !dq.is_empty() {
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s.send(dq)?;
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}
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Ok(())
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}
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pub fn blob_receiver(
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sock: Arc<UdpSocket>,
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exit: &Arc<AtomicBool>,
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s: BlobSender,
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) -> JoinHandle<()> {
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//DOCUMENTED SIDE-EFFECT
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//1 second timeout on socket read
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let timer = Duration::new(1, 0);
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sock.set_read_timeout(Some(timer))
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.expect("set socket timeout");
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let exit = exit.clone();
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Builder::new()
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.name("solana-blob_receiver".to_string())
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.spawn(move || loop {
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if exit.load(Ordering::Relaxed) {
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break;
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}
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let _ = recv_blobs(&sock, &s);
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})
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.unwrap()
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}
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#[cfg(test)]
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mod test {
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use super::*;
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use crate::packet::{Blob, Packet, Packets, SharedBlob, PACKET_DATA_SIZE};
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use crate::recycler::Recycler;
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use crate::streamer::{receiver, responder};
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use std::io;
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use std::io::Write;
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use std::net::UdpSocket;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::mpsc::channel;
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use std::sync::Arc;
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use std::time::Duration;
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fn get_msgs(r: PacketReceiver, num: &mut usize) -> Result<()> {
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for _ in 0..10 {
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let m = r.recv_timeout(Duration::new(1, 0));
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if m.is_err() {
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continue;
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}
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*num -= m.unwrap().packets.len();
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if *num == 0 {
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break;
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}
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}
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Ok(())
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}
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#[test]
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fn streamer_debug() {
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write!(io::sink(), "{:?}", Packet::default()).unwrap();
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write!(io::sink(), "{:?}", Packets::default()).unwrap();
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write!(io::sink(), "{:?}", Blob::default()).unwrap();
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}
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#[test]
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fn streamer_send_test() {
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let read = UdpSocket::bind("127.0.0.1:0").expect("bind");
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read.set_read_timeout(Some(Duration::new(1, 0))).unwrap();
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let addr = read.local_addr().unwrap();
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let send = UdpSocket::bind("127.0.0.1:0").expect("bind");
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let exit = Arc::new(AtomicBool::new(false));
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let (s_reader, r_reader) = channel();
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let t_receiver = receiver(Arc::new(read), &exit, s_reader, Recycler::default(), "test");
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let t_responder = {
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let (s_responder, r_responder) = channel();
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let t_responder = responder("streamer_send_test", Arc::new(send), r_responder);
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let mut msgs = Vec::new();
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for i in 0..5 {
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let b = SharedBlob::default();
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{
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let mut w = b.write().unwrap();
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w.data[0] = i as u8;
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w.meta.size = PACKET_DATA_SIZE;
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w.meta.set_addr(&addr);
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}
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msgs.push(b);
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}
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s_responder.send(msgs).expect("send");
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t_responder
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};
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let mut num = 5;
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get_msgs(r_reader, &mut num).expect("get_msgs");
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assert_eq!(num, 0);
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exit.store(true, Ordering::Relaxed);
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t_receiver.join().expect("join");
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t_responder.join().expect("join");
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}
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}
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