Multi-mode logging. (#1643)

* Multi-mode logging.

Better for miners (they get immediate notification of new block).
Better for general use (less superfluous information shown).

* Remove comment.

[ci:skip]

* Minor string change

[ci:skip]

* Minor message tweak.

* Minor tweaks and indentation fix.

ethcore/src/client/client.rs

@@ -22,21 +22,18 @@ use std::sync::{Arc, Weak};
 use std::path::{Path, PathBuf};
 use std::fmt;
 use std::sync::atomic::{AtomicUsize, AtomicBool, Ordering as AtomicOrdering};
-use std::time::Instant;
+use std::time::{Instant, Duration};
+use time::precise_time_ns;
 
 // util
+use util::{journaldb, rlp, Bytes, Stream, View, PerfTimer, Itertools, Mutex, RwLock, Colour};
+use util::journaldb::JournalDB;
+use util::rlp::{RlpStream, Rlp, UntrustedRlp};
 use util::numbers::*;
 use util::panics::*;
 use util::io::*;
-use util::rlp;
 use util::sha3::*;
-use util::Bytes;
-use util::rlp::{RlpStream, Rlp, UntrustedRlp};
-use util::journaldb;
-use util::journaldb::JournalDB;
 use util::kvdb::*;
-use util::{Stream, View, PerfTimer, Itertools};
-use util::{Mutex, RwLock};
 
 // other
 use views::BlockView;
@@ -145,6 +142,8 @@ pub struct Client {
 	notify: RwLock<Option<Weak<ChainNotify>>>,
 	queue_transactions: AtomicUsize,
 	previous_enode: Mutex<Option<String>>,
+	skipped: AtomicUsize,
+	last_import: Mutex<Instant>,
 	last_hashes: RwLock<VecDeque<H256>>,
 }
 
@@ -233,6 +232,8 @@ impl Client {
 			notify: RwLock::new(None),
 			queue_transactions: AtomicUsize::new(0),
 			previous_enode: Mutex::new(None),
+			skipped: AtomicUsize::new(0),
+			last_import: Mutex::new(Instant::now()),
 			last_hashes: RwLock::new(VecDeque::new()),
 		};
 		Ok(Arc::new(client))
@@ -367,16 +368,21 @@ impl Client {
 
 			for block in blocks {
 				let header = &block.header;
+				let start = precise_time_ns();
 
 				if invalid_blocks.contains(&header.parent_hash) {
 					invalid_blocks.insert(header.hash());
 					continue;
 				}
+				let tx_count = block.transactions.len();
+				let size = block.bytes.len();
+
 				let closed_block = self.check_and_close_block(&block);
 				if let Err(_) = closed_block {
 					invalid_blocks.insert(header.hash());
 					continue;
 				}
+
 				let closed_block = closed_block.unwrap();
 				imported_blocks.push(header.hash());
 
@@ -384,7 +390,30 @@ impl Client {
 				import_results.push(route);
 
 				self.report.write().accrue_block(&block);
-				trace!(target: "client", "Imported #{} ({})", header.number(), header.hash());
+
+				let duration_ns = precise_time_ns() - start;
+
+				let mut last_import = self.last_import.lock();
+				if Instant::now() > *last_import + Duration::from_secs(1) {
+					let queue_info = self.queue_info();
+					let importing = queue_info.unverified_queue_size + queue_info.verified_queue_size > 3;
+					if !importing { 
+						let skipped = self.skipped.load(AtomicOrdering::Relaxed);
+						info!(target: "import", "Imported {} {} ({} txs, {} Mgas, {} ms, {} KiB){}",
+							Colour::White.bold().paint(format!("#{}", header.number())),
+							Colour::White.bold().paint(format!("{}", header.hash())),
+							Colour::Yellow.bold().paint(format!("{}", tx_count)),
+							Colour::Yellow.bold().paint(format!("{:.2}", header.gas_used.low_u64() as f32 / 1000000f32)),
+							Colour::Purple.bold().paint(format!("{:.2}", duration_ns as f32 / 1000000f32)),
+							Colour::Blue.bold().paint(format!("{:.2}", size as f32 / 1024f32)),
+							if skipped > 0 { format!(" + another {} block(s)", Colour::Red.bold().paint(format!("{}", skipped))) } else { String::new() } 
+						);
+						*last_import = Instant::now();
+					}
+					self.skipped.store(0, AtomicOrdering::Relaxed);
+				} else {
+					self.skipped.fetch_add(1, AtomicOrdering::Relaxed); 
+				}
 			}
 
 			let imported = imported_blocks.len();