openethereum/parity/io_handler.rs

// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.

// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity.  If not, see <http://www.gnu.org/licenses/>.

use std::sync::{Arc, Weak};
use ethcore::client::Client;
use ethcore::service::{NetSyncMessage, SyncMessage};
use ethsync::EthSync;
use ethcore::account_provider::AccountProvider;
use util::{TimerToken, IoHandler, IoContext, NetworkService, NetworkIoMessage};

use informant::Informant;

const INFO_TIMER: TimerToken = 0;

pub struct ClientIoHandler {
	pub client: Arc<Client>,
	pub sync: Arc<EthSync>,
	pub accounts: Arc<AccountProvider>,
	pub info: Informant,
	pub network: Weak<NetworkService<SyncMessage>>,
}

impl IoHandler<NetSyncMessage> for ClientIoHandler {
	fn initialize(&self, io: &IoContext<NetSyncMessage>) {
		io.register_timer(INFO_TIMER, 5000).expect("Error registering timer");
	}

	fn timeout(&self, _io: &IoContext<NetSyncMessage>, timer: TimerToken) {
		if let INFO_TIMER = timer {
			if let Some(net) = self.network.upgrade() {
				self.info.tick(&self.client, Some((&self.sync, &net)));
			}
		}
	}

	fn message(&self, _io: &IoContext<NetSyncMessage>, message: &NetSyncMessage) {
		match *message {
			NetworkIoMessage::User(SyncMessage::StartNetwork) => {
				if let Some(network) = self.network.upgrade() {
					network.start().unwrap_or_else(|e| warn!("Error starting network: {:?}", e));
					EthSync::register(&*network, self.sync.clone()).unwrap_or_else(|e| warn!("Error registering eth protocol handler: {}", e));
				}
			},
			NetworkIoMessage::User(SyncMessage::StopNetwork) => {
				if let Some(network) = self.network.upgrade() {
					network.stop().unwrap_or_else(|e| warn!("Error stopping network: {:?}", e));
				}
			},
			_ => {/* Ignore other messages */},
		}
	}
}