fix writer

src/accountant_skel.rs

@@ -13,12 +13,14 @@ use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::mpsc::channel;
 use std::thread::{spawn, JoinHandle};
 use std::default::Default;
+use std::io::Write;
 use serde_json;
 
-pub struct AccountantSkel {
+pub struct AccountantSkel<W: Write + Send + 'static> {
     pub acc: Accountant,
     pub last_id: Hash,
     pub ledger: Vec<Entry>,
+    writer: W,
 }
 
 #[cfg_attr(feature = "cargo-clippy", allow(large_enum_variant))]
@@ -37,20 +39,21 @@ pub enum Response {
     Id { id: Hash, is_last: bool },
 }
 
-impl AccountantSkel {
-    pub fn new(acc: Accountant) -> Self {
+impl<W: Write + Send + 'static> AccountantSkel<W> {
+    pub fn new(acc: Accountant, w: W) -> Self {
         let last_id = acc.first_id;
         AccountantSkel {
             acc,
             last_id,
             ledger: vec![],
+            writer: w,
         }
     }
 
-    pub fn sync(self: &mut Self) -> Hash {
+    pub fn sync(&mut self) -> Hash {
         while let Ok(entry) = self.acc.historian.receiver.try_recv() {
             self.last_id = entry.id;
-            println!("{}", serde_json::to_string(&entry).unwrap());
+            write!(self.writer, "{}", serde_json::to_string(&entry).unwrap()).unwrap();
             self.ledger.push(entry);
         }
         self.last_id
@@ -131,7 +134,7 @@ impl AccountantSkel {
 
     /// UDP Server that forwards messages to Accountant methods.
     pub fn serve(
-        obj: Arc<Mutex<AccountantSkel>>,
+        obj: Arc<Mutex<AccountantSkel<W>>>,
         addr: &str,
         exit: Arc<AtomicBool>,
     ) -> Result<Vec<JoinHandle<()>>> {

src/accountant_stub.rs

@@ -128,6 +128,7 @@ mod tests {
     use signature::{KeyPair, KeyPairUtil};
     use std::sync::{Arc, Mutex};
     use std::sync::atomic::{AtomicBool, Ordering};
+    use std::io::sink;
 
     #[test]
     fn test_accountant_stub() {
@@ -137,7 +138,7 @@ mod tests {
         let acc = Accountant::new(&alice, Some(30));
         let bob_pubkey = KeyPair::new().pubkey();
         let exit = Arc::new(AtomicBool::new(false));
-        let acc = Arc::new(Mutex::new(AccountantSkel::new(acc)));
+        let acc = Arc::new(Mutex::new(AccountantSkel::new(acc, sink())));
         let threads = AccountantSkel::serve(acc, addr, exit.clone()).unwrap();
         sleep(Duration::from_millis(30));
 

src/bin/testnode.rs

@@ -3,7 +3,7 @@ extern crate silk;
 
 use silk::accountant_skel::AccountantSkel;
 use silk::accountant::Accountant;
-use std::io::{self, BufRead};
+use std::io::{self, stdout, BufRead};
 use std::sync::{Arc, Mutex};
 use std::sync::atomic::AtomicBool;
 
@@ -16,7 +16,7 @@ fn main() {
         .map(|line| serde_json::from_str(&line.unwrap()).unwrap());
     let acc = Accountant::new_from_entries(entries, Some(1000));
     let exit = Arc::new(AtomicBool::new(false));
-    let skel = Arc::new(Mutex::new(AccountantSkel::new(acc)));
+    let skel = Arc::new(Mutex::new(AccountantSkel::new(acc, stdout())));
     eprintln!("Listening on {}", addr);
     let threads = AccountantSkel::serve(skel, addr, exit.clone()).unwrap();
     for t in threads {