130 lines
4.1 KiB
Rust
130 lines
4.1 KiB
Rust
// Copyright 2015, 2016 Ethcore (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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//! Tendermint timeout handling.
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use std::sync::atomic::{Ordering as AtomicOrdering};
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use std::sync::Weak;
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use io::{IoContext, IoHandler, TimerToken};
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use super::{Tendermint, Step};
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use time::{get_time, Duration};
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use service::ClientIoMessage;
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pub struct TimerHandler {
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engine: Weak<Tendermint>,
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}
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/// Base timeout of each step in ms.
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#[derive(Debug, Clone)]
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pub struct TendermintTimeouts {
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pub propose: Duration,
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pub prevote: Duration,
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pub precommit: Duration,
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pub commit: Duration
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}
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impl TendermintTimeouts {
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pub fn for_step(&self, step: Step) -> Duration {
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match step {
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Step::Propose => self.propose,
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Step::Prevote => self.prevote,
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Step::Precommit => self.precommit,
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Step::Commit => self.commit,
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}
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}
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}
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impl Default for TendermintTimeouts {
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fn default() -> Self {
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TendermintTimeouts {
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propose: Duration::milliseconds(1000),
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prevote: Duration::milliseconds(1000),
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precommit: Duration::milliseconds(1000),
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commit: Duration::milliseconds(1000)
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}
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}
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}
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#[derive(Clone)]
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pub struct NextStep;
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/// Timer token representing the consensus step timeouts.
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pub const ENGINE_TIMEOUT_TOKEN: TimerToken = 23;
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fn set_timeout(io: &IoContext<NextStep>, timeout: Duration) {
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io.register_timer_once(ENGINE_TIMEOUT_TOKEN, timeout.num_milliseconds() as u64)
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.unwrap_or_else(|e| warn!(target: "poa", "Failed to set consensus step timeout: {}.", e))
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}
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fn update_sealing(io_channel: Mutex<Option<IoChannel<ClientIoMessage>>>) {
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if let Some(ref channel) = *io_channel.lock() {
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match channel.send(ClientIoMessage::UpdateSealing) {
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Ok(_) => trace!(target: "poa", "timeout: UpdateSealing message sent for round {}.", engine.round.load(AtomicOrdering::SeqCst)),
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Err(err) => trace!(target: "poa", "timeout: Could not send a sealing message {} for round {}.", err, engine.round.load(AtomicOrdering::SeqCst)),
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}
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}
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}
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impl IoHandler<NextStep> for TimerHandler {
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fn initialize(&self, io: &IoContext<NextStep>) {
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if let Some(engine) = self.engine.upgrade() {
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set_timeout(io, engine.our_params.timeouts.propose)
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}
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}
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fn timeout(&self, io: &IoContext<NextStep>, timer: TimerToken) {
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if timer == ENGINE_TIMEOUT_TOKEN {
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if let Some(engine) = self.engine.upgrade() {
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let next_step = match *engine.step.read() {
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Step::Propose => {
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set_timeout(io, engine.our_params.timeouts.prevote);
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Some(Step::Prevote)
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},
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Step::Prevote if engine.has_enough_any_votes() => {
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set_timeout(io, engine.our_params.timeouts.precommit);
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Some(Step::Precommit)
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},
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Step::Precommit if engine.has_enough_any_votes() => {
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set_timeout(io, engine.our_params.timeouts.propose);
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engine.round.fetch_add(1, AtomicOrdering::SeqCst);
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Some(Step::Propose)
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},
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Step::Commit => {
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set_timeout(io, engine.our_params.timeouts.propose);
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engine.round.store(0, AtomicOrdering::SeqCst);
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engine.height.fetch_add(1, AtomicOrdering::SeqCst);
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Some(Step::Propose)
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},
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_ => None,
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};
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if let Some(step) = next_step {
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*engine.step.write() = step
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}
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}
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}
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}
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fn message(&self, io: &IoContext<NextStep>, _net_message: &NextStep) {
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if let Some(engine) = self.engine.upgrade() {
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println!("Message: {:?}", get_time().sec);
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io.clear_timer(ENGINE_TIMEOUT_TOKEN).expect("Failed to restart consensus step timer.");
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io.register_timer_once(ENGINE_TIMEOUT_TOKEN, engine.next_timeout()).expect("Failed to restart consensus step timer.")
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}
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}
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}
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