openethereum/dapps/node-health/src/health.rs
Tomasz Drwięga e8b418ca03 Update jsonrpc dependencies and rewrite dapps to futures. (#6522)
* Bump version.

* Fix RPC crate.

* Fix BoxFuture in crates.

* Compiles and passes tests!

* Get rid of .boxed()

* Fixing issues with the UI.

* Remove minihttp. Support threads.

* Reimplement files serving to do it in chunks.

* Increase chunk size.

* Remove some unecessary copying.

* Fix tests.

* Fix stratum warning and ipfs todo.

* Switch to proper branch of jsonrpc.

* Update Cargo.lock.

* Update docs.

* Include dapps-glue in workspace.

* fixed merge artifacts

* Fix test compilation.
2017-10-05 12:35:01 +02:00

123 lines
3.9 KiB
Rust

// Copyright 2015-2017 Parity Technologies (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/>.
//! Reporting node's health.
use std::sync::Arc;
use std::time;
use futures::Future;
use futures::sync::oneshot;
use types::{HealthInfo, HealthStatus, Health};
use time::{TimeChecker, MAX_DRIFT};
use parity_reactor::Remote;
use parking_lot::Mutex;
use {SyncStatus};
const TIMEOUT_SECS: u64 = 5;
const PROOF: &str = "Only one closure is invoked.";
/// A struct enabling you to query for node's health.
#[derive(Debug, Clone)]
pub struct NodeHealth {
sync_status: Arc<SyncStatus>,
time: TimeChecker,
remote: Remote,
}
impl NodeHealth {
/// Creates new `NodeHealth`.
pub fn new(sync_status: Arc<SyncStatus>, time: TimeChecker, remote: Remote) -> Self {
NodeHealth { sync_status, time, remote, }
}
/// Query latest health report.
pub fn health(&self) -> Box<Future<Item = Health, Error = ()> + Send> {
trace!(target: "dapps", "Checking node health.");
// Check timediff
let sync_status = self.sync_status.clone();
let time = self.time.time_drift();
let (tx, rx) = oneshot::channel();
let tx = Arc::new(Mutex::new(Some(tx)));
let tx2 = tx.clone();
self.remote.spawn_with_timeout(
move || time.then(move |result| {
let _ = tx.lock().take().expect(PROOF).send(Ok(result));
Ok(())
}),
time::Duration::from_secs(TIMEOUT_SECS),
move || {
let _ = tx2.lock().take().expect(PROOF).send(Err(()));
},
);
Box::new(rx.map_err(|err| {
warn!(target: "dapps", "Health request cancelled: {:?}", err);
}).and_then(move |time| {
// Check peers
let peers = {
let (connected, max) = sync_status.peers();
let (status, message) = match connected {
0 => {
(HealthStatus::Bad, "You are not connected to any peers. There is most likely some network issue. Fix connectivity.".into())
},
1 => (HealthStatus::NeedsAttention, "You are connected to only one peer. Your node might not be reliable. Check your network connection.".into()),
_ => (HealthStatus::Ok, "".into()),
};
HealthInfo { status, message, details: (connected, max) }
};
// Check sync
let sync = {
let is_syncing = sync_status.is_major_importing();
let (status, message) = if is_syncing {
(HealthStatus::NeedsAttention, "Your node is still syncing, the values you see might be outdated. Wait until it's fully synced.".into())
} else {
(HealthStatus::Ok, "".into())
};
HealthInfo { status, message, details: is_syncing }
};
// Check time
let time = {
let (status, message, details) = match time {
Ok(Ok(diff)) if diff < MAX_DRIFT && diff > -MAX_DRIFT => {
(HealthStatus::Ok, "".into(), diff)
},
Ok(Ok(diff)) => {
(HealthStatus::Bad, format!(
"Your clock is not in sync. Detected difference is too big for the protocol to work: {}ms. Synchronize your clock.",
diff,
), diff)
},
Ok(Err(err)) => {
(HealthStatus::NeedsAttention, format!(
"Unable to reach time API: {}. Make sure that your clock is synchronized.",
err,
), 0)
},
Err(_) => {
(HealthStatus::NeedsAttention, "Time API request timed out. Make sure that the clock is synchronized.".into(), 0)
},
};
HealthInfo { status, message, details, }
};
Ok(Health { peers, sync, time})
}))
}
}