openethereum/src/service.rs
2016-01-22 04:54:38 +01:00

103 lines
2.6 KiB
Rust

use util::*;
use sync::*;
use spec::Spec;
use error::*;
use std::env;
use client::Client;
/// Message type for external and internal events
#[derive(Clone)]
pub enum SyncMessage {
/// New block has been imported into the blockchain
NewChainBlock(Bytes), //TODO: use Cow
/// A block is ready
BlockVerified,
}
/// TODO [arkpar] Please document me
pub type NetSyncMessage = NetworkIoMessage<SyncMessage>;
/// Client service setup. Creates and registers client and network services with the IO subsystem.
pub struct ClientService {
net_service: NetworkService<SyncMessage>,
client: Arc<Client>,
sync: Arc<EthSync>,
}
impl ClientService {
/// Start the service in a separate thread.
pub fn start(spec: Spec) -> Result<ClientService, Error> {
let mut net_service = try!(NetworkService::start());
info!("Starting {}", net_service.host_info());
info!("Configured for {} using {} engine", spec.name, spec.engine_name);
let mut dir = env::home_dir().unwrap();
dir.push(".parity");
dir.push(H64::from(spec.genesis_header().hash()).hex());
let client = try!(Client::new(spec, &dir, net_service.io().channel()));
let sync = EthSync::register(&mut net_service, client.clone());
let client_io = Arc::new(ClientIoHandler {
client: client.clone()
});
try!(net_service.io().register_handler(client_io));
Ok(ClientService {
net_service: net_service,
client: client,
sync: sync,
})
}
/// TODO [arkpar] Please document me
pub fn io(&mut self) -> &mut IoService<NetSyncMessage> {
self.net_service.io()
}
/// TODO [arkpar] Please document me
pub fn client(&self) -> Arc<Client> {
self.client.clone()
}
/// Get shared sync handler
pub fn sync(&self) -> Arc<EthSync> {
self.sync.clone()
}
}
/// IO interface for the Client handler
struct ClientIoHandler {
client: Arc<Client>
}
const CLIENT_TICK_TIMER: TimerToken = 0;
const CLIENT_TICK_MS: u64 = 5000;
impl IoHandler<NetSyncMessage> for ClientIoHandler {
fn initialize(&self, io: &IoContext<NetSyncMessage>) {
io.register_timer(CLIENT_TICK_TIMER, CLIENT_TICK_MS).expect("Error registering client timer");
}
fn timeout(&self, _io: &IoContext<NetSyncMessage>, timer: TimerToken) {
if timer == CLIENT_TICK_TIMER {
self.client.tick();
}
}
fn message(&self, io: &IoContext<NetSyncMessage>, net_message: &NetSyncMessage) {
match net_message {
&UserMessage(ref message) => {
match message {
&SyncMessage::BlockVerified => {
self.client.import_verified_blocks(&io.channel());
},
_ => {}, // ignore other messages
}
}
_ => {}, // ignore other messages
}
}
}