Drop support for EntryInfo subscriptions

src/entry_writer.rs

@@ -4,7 +4,6 @@ use accountant::Accountant;
 use entry::Entry;
 use ledger;
 use packet;
-use request_processor::RequestProcessor;
 use result::Result;
 use serde_json;
 use std::collections::VecDeque;
@@ -17,16 +16,12 @@ use streamer;
 
 pub struct EntryWriter<'a> {
     accountant: &'a Accountant,
-    request_processor: &'a RequestProcessor,
 }
 
 impl<'a> EntryWriter<'a> {
     /// Create a new Tpu that wraps the given Accountant.
-    pub fn new(accountant: &'a Accountant, request_processor: &'a RequestProcessor) -> Self {
-        EntryWriter {
-            accountant,
-            request_processor,
-        }
+    pub fn new(accountant: &'a Accountant) -> Self {
+        EntryWriter { accountant }
     }
 
     fn write_entry<W: Write>(&self, writer: &Mutex<W>, entry: &Entry) {
@@ -37,7 +32,6 @@ impl<'a> EntryWriter<'a> {
             "{}",
             serde_json::to_string(&entry).expect("'entry' to_strong in fn write_entry")
         ).expect("writeln! in fn write_entry");
-        self.request_processor.notify_entry_info_subscribers(&entry);
     }
 
     fn write_entries<W: Write>(

src/request.rs

@@ -14,19 +14,6 @@ pub enum Request {
     GetBalance { key: PublicKey },
     GetLastId,
     GetTransactionCount,
-    Subscribe { subscriptions: Vec<Subscription> },
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub enum Subscription {
-    EntryInfo,
-}
-
-#[derive(Serialize, Deserialize, Debug, Clone)]
-pub struct EntryInfo {
-    pub id: Hash,
-    pub num_hashes: u64,
-    pub num_events: u64,
 }
 
 impl Request {
@@ -44,7 +31,6 @@ pub enum Response {
     Balance { key: PublicKey, val: Option<i64> },
     LastId { id: Hash },
     TransactionCount { transaction_count: u64 },
-    EntryInfo(EntryInfo),
 }
 
 pub fn to_request_packets(r: &packet::PacketRecycler, reqs: Vec<Request>) -> Vec<SharedPackets> {

src/request_processor.rs

@@ -8,12 +8,12 @@ use event_processor::EventProcessor;
 use packet;
 use packet::SharedPackets;
 use rayon::prelude::*;
-use request::{EntryInfo, Request, Response, Subscription};
+use request::{Request, Response};
 use result::Result;
 use std::collections::VecDeque;
-use std::net::{SocketAddr, UdpSocket};
+use std::net::SocketAddr;
+use std::sync::Arc;
 use std::sync::mpsc::{Receiver, Sender};
-use std::sync::{Arc, Mutex};
 use std::time::Duration;
 use std::time::Instant;
 use streamer;
@@ -21,16 +21,12 @@ use timing;
 
 pub struct RequestProcessor {
     accountant: Arc<Accountant>,
-    entry_info_subscribers: Mutex<Vec<SocketAddr>>,
 }
 
 impl RequestProcessor {
     /// Create a new Tpu that wraps the given Accountant.
     pub fn new(accountant: Arc<Accountant>) -> Self {
-        RequestProcessor {
-            accountant,
-            entry_info_subscribers: Mutex::new(vec![]),
-        }
+        RequestProcessor { accountant }
     }
 
     /// Process Request items sent by clients.
@@ -59,16 +55,6 @@ impl RequestProcessor {
                 Some(rsp)
             }
             Request::Transaction(_) => unreachable!(),
-            Request::Subscribe { subscriptions } => {
-                for subscription in subscriptions {
-                    match subscription {
-                        Subscription::EntryInfo => {
-                            self.entry_info_subscribers.lock().unwrap().push(rsp_addr)
-                        }
-                    }
-                }
-                None
-            }
         }
     }
 
@@ -81,29 +67,6 @@ impl RequestProcessor {
             .collect()
     }
 
-    pub fn notify_entry_info_subscribers(&self, entry: &Entry) {
-        // TODO: No need to bind().
-        let socket = UdpSocket::bind("0.0.0.0:0").expect("bind");
-
-        // copy subscribers to avoid taking lock while doing io
-        let addrs = self.entry_info_subscribers.lock().unwrap().clone();
-        trace!("Sending to {} addrs", addrs.len());
-        for addr in addrs {
-            let entry_info = EntryInfo {
-                id: entry.id,
-                num_hashes: entry.num_hashes,
-                num_events: entry.events.len() as u64,
-            };
-            let data = serialize(&Response::EntryInfo(entry_info)).expect("serialize EntryInfo");
-            trace!("sending {} to {}", data.len(), addr);
-            //TODO dont do IO here, this needs to be on a separate channel
-            let res = socket.send_to(&data, addr);
-            if res.is_err() {
-                eprintln!("couldn't send response: {:?}", res);
-            }
-        }
-    }
-
     fn deserialize_requests(p: &packet::Packets) -> Vec<Option<(Request, SocketAddr)>> {
         p.packets
             .par_iter()

src/rpu.rs

@@ -33,7 +33,6 @@ impl Rpu {
 
     fn write_service<W: Write + Send + 'static>(
         accountant: Arc<Accountant>,
-        request_processor: Arc<RequestProcessor>,
         exit: Arc<AtomicBool>,
         broadcast: streamer::BlobSender,
         blob_recycler: packet::BlobRecycler,
@@ -41,7 +40,7 @@ impl Rpu {
         entry_receiver: Receiver<Entry>,
     ) -> JoinHandle<()> {
         spawn(move || loop {
-            let entry_writer = EntryWriter::new(&accountant, &request_processor);
+            let entry_writer = EntryWriter::new(&accountant);
             let _ = entry_writer.write_and_send_entries(
                 &broadcast,
                 &blob_recycler,
@@ -99,7 +98,6 @@ impl Rpu {
         let (broadcast_sender, broadcast_receiver) = channel();
         let t_write = Self::write_service(
             self.event_processor.accountant.clone(),
-            request_stage.request_processor.clone(),
             exit.clone(),
             broadcast_sender,
             blob_recycler.clone(),

src/thin_client.rs

@@ -6,7 +6,7 @@
 use bincode::{deserialize, serialize};
 use futures::future::{ok, FutureResult};
 use hash::Hash;
-use request::{Request, Response, Subscription};
+use request::{Request, Response};
 use signature::{KeyPair, PublicKey, Signature};
 use std::collections::HashMap;
 use std::io;
@@ -18,7 +18,6 @@ pub struct ThinClient {
     pub requests_socket: UdpSocket,
     pub events_socket: UdpSocket,
     last_id: Option<Hash>,
-    num_events: u64,
     transaction_count: u64,
     balances: HashMap<PublicKey, Option<i64>>,
 }
@@ -33,22 +32,12 @@ impl ThinClient {
             requests_socket,
             events_socket,
             last_id: None,
-            num_events: 0,
             transaction_count: 0,
             balances: HashMap::new(),
         };
-        client.init();
         client
     }
 
-    pub fn init(&self) {
-        let subscriptions = vec![Subscription::EntryInfo];
-        let req = Request::Subscribe { subscriptions };
-        let data = serialize(&req).expect("serialize Subscribe in thin_client");
-        trace!("subscribing to {}", self.addr);
-        let _res = self.requests_socket.send_to(&data, &self.addr);
-    }
-
     pub fn recv_response(&self) -> io::Result<Response> {
         let mut buf = vec![0u8; 1024];
         info!("start recv_from");
@@ -72,11 +61,6 @@ impl ThinClient {
                 info!("Response transaction count {:?}", transaction_count);
                 self.transaction_count = transaction_count;
             }
-            Response::EntryInfo(entry_info) => {
-                trace!("Response entry_info {:?}", entry_info.id);
-                self.last_id = Some(entry_info.id);
-                self.num_events += entry_info.num_events;
-            }
         }
     }
 

src/tvu.rs

@@ -34,12 +34,11 @@ impl Tvu {
 
     fn drain_service(
         accountant: Arc<Accountant>,
-        request_processor: Arc<RequestProcessor>,
         exit: Arc<AtomicBool>,
         entry_receiver: Receiver<Entry>,
     ) -> JoinHandle<()> {
         spawn(move || {
-            let entry_writer = EntryWriter::new(&accountant, &request_processor);
+            let entry_writer = EntryWriter::new(&accountant);
             loop {
                 let _ = entry_writer.drain_entries(&entry_receiver);
                 if exit.load(Ordering::Relaxed) {
@@ -183,7 +182,6 @@ impl Tvu {
 
         let t_write = Self::drain_service(
             obj.event_processor.accountant.clone(),
-            request_stage.request_processor.clone(),
             exit.clone(),
             request_stage.entry_receiver,
         );