112 lines
2.8 KiB
Rust
112 lines
2.8 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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use std::collections::HashMap;
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use std::sync::Arc;
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use std::time::{Instant, Duration};
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use ethereum_types::{H256, U256};
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use parking_lot::Mutex;
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/// External miner interface.
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pub trait ExternalMinerService: Send + Sync {
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/// Submit hashrate for given miner.
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fn submit_hashrate(&self, hashrate: U256, id: H256);
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/// Total hashrate.
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fn hashrate(&self) -> U256;
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}
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/// External Miner.
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pub struct ExternalMiner {
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hashrates: Arc<Mutex<HashMap<H256, (Instant, U256)>>>,
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}
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impl Default for ExternalMiner {
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fn default() -> Self {
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ExternalMiner {
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hashrates: Arc::new(Mutex::new(HashMap::new())),
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}
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}
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}
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impl ExternalMiner {
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/// Creates new external miner with prefilled hashrates.
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pub fn new(hashrates: Arc<Mutex<HashMap<H256, (Instant, U256)>>>) -> Self {
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ExternalMiner {
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hashrates: hashrates,
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}
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}
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}
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const ENTRY_TIMEOUT: u64 = 2;
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impl ExternalMinerService for ExternalMiner {
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fn submit_hashrate(&self, hashrate: U256, id: H256) {
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self.hashrates.lock().insert(id, (Instant::now() + Duration::from_secs(ENTRY_TIMEOUT), hashrate));
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}
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fn hashrate(&self) -> U256 {
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let mut hashrates = self.hashrates.lock();
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let h = hashrates.drain().filter(|&(_, (t, _))| t > Instant::now()).collect();
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*hashrates = h;
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hashrates.iter().fold(U256::from(0), |sum, (_, &(_, v))| sum + v)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use std::thread::sleep;
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use std::time::Duration;
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use ethereum_types::{H256, U256};
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fn miner() -> ExternalMiner {
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ExternalMiner::default()
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}
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#[test]
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fn it_should_forget_old_hashrates() {
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// given
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let m = miner();
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assert_eq!(m.hashrate(), U256::from(0));
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m.submit_hashrate(U256::from(10), H256::from(1));
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assert_eq!(m.hashrate(), U256::from(10));
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// when
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sleep(Duration::from_secs(3));
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// then
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assert_eq!(m.hashrate(), U256::from(0));
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}
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#[test]
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fn should_sum_up_hashrate() {
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// given
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let m = miner();
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assert_eq!(m.hashrate(), U256::from(0));
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m.submit_hashrate(U256::from(10), H256::from(1));
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assert_eq!(m.hashrate(), U256::from(10));
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// when
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m.submit_hashrate(U256::from(15), H256::from(1));
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m.submit_hashrate(U256::from(20), H256::from(2));
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// then
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assert_eq!(m.hashrate(), U256::from(35));
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}
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}
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