Fix up client demo

src/accountant_skel.rs

@@ -1,12 +1,12 @@
 use accountant::Accountant;
-use bincode::{deserialize, serialize, serialize_into};
+use bincode::{deserialize, serialize};
 use entry::Entry;
 use hash::Hash;
 use result::Result;
 use serde_json;
 use signature::PublicKey;
 use std::default::Default;
-use std::io::Write;
+use std::io::{ErrorKind, Write};
 use std::net::{TcpListener, TcpStream, UdpSocket};
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::mpsc::channel;
@@ -52,12 +52,14 @@ impl<W: Write + Send + 'static> AccountantSkel<W> {
     pub fn sync(&mut self) -> Hash {
         while let Ok(entry) = self.acc.historian.receiver.try_recv() {
             self.last_id = entry.id;
-            write!(self.writer, "{}", serde_json::to_string(&entry).unwrap()).unwrap();
+            writeln!(self.writer, "{}", serde_json::to_string(&entry).unwrap()).unwrap();
 
-            for mut subscriber in &self.subscribers {
-                // TODO: Handle errors. If TCP stream is closed, remove it.
-                serialize_into(subscriber, &entry).unwrap();
-            }
+            let buf = serialize(&entry).expect("serialize");
+            self.subscribers
+                .retain(|ref mut subscriber| match subscriber.write(&buf) {
+                    Err(err) => err.kind() != ErrorKind::BrokenPipe,
+                    _ => true,
+                });
         }
         self.last_id
     }

src/accountant_stub.rs

@@ -84,7 +84,7 @@ impl AccountantStub {
         let mut buf = vec![0u8; 65_535];
         let mut buf_offset = 0;
         let mut found = false;
-        if let Ok(bytes) = self.stream.read(&mut buf) {
+        if let Ok(_bytes) = self.stream.read(&mut buf) {
             loop {
                 match deserialize::<Entry>(&buf[buf_offset..]) {
                     Ok(entry) => {
@@ -100,10 +100,7 @@ impl AccountantStub {
                             }
                         }
                     }
-                    Err(_) => {
-                        println!("read {} of {} in buf", buf_offset, bytes);
-                        break;
-                    }
+                    Err(_) => break,
                 }
             }
         }

src/bin/client-demo.rs

@@ -18,14 +18,17 @@ fn main() {
     let mint_pubkey = mint.pubkey();
 
     let socket = UdpSocket::bind(send_addr).unwrap();
-    let stream = TcpStream::connect(send_addr).unwrap();
+    let stream = TcpStream::connect(addr).unwrap();
+    stream.set_nonblocking(true).expect("nonblocking");
+
     let mut acc = AccountantStub::new(addr, socket, stream);
     let last_id = acc.get_last_id().unwrap();
 
-    let txs = acc.get_balance(&mint_pubkey).unwrap().unwrap();
-    println!("Mint's Initial Balance {}", txs);
+    let mint_balance = acc.get_balance(&mint_pubkey).unwrap().unwrap();
+    println!("Mint's Initial Balance {}", mint_balance);
 
     println!("Signing transactions...");
+    let txs = mint_balance;
     let now = Instant::now();
     let transactions: Vec<_> = (0..txs)
         .map(|_| {
@@ -66,7 +69,9 @@ fn main() {
         acc.transfer_signed(tr).unwrap();
     }
     println!("Waiting for last transaction to be confirmed...",);
-    acc.wait_on_signature(&sig, &last_id).unwrap();
+    if txs > 0 {
+        acc.wait_on_signature(&sig, &last_id).unwrap();
+    }
 
     let duration = now.elapsed();
     let ns = duration.as_secs() * 1_000_000_000 + u64::from(duration.subsec_nanos());
@@ -74,5 +79,5 @@ fn main() {
     println!("Done. {} tps!", tps);
     let val = acc.get_balance(&mint_pubkey).unwrap().unwrap();
     println!("Mint's Final Balance {}", val);
-    assert_eq!(val, 0);
+    assert_eq!(val, mint_balance - txs);
 }