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bd70de8b8b
* Alter gitlab. * Use substrate's rustfmt.toml * cargo +nightly fmt --all * Fix spellcheck. * cargo +nightly fmt --all * format. * Fix spellcheck and fmt * fmt? * Fix spellcheck Co-authored-by: Tomasz Drwięga <tomasz@parity.io>
94 lines
2.9 KiB
Rust
94 lines
2.9 KiB
Rust
// Copyright 2019-2021 Parity Technologies (UK) Ltd.
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// This file is part of Parity Bridges Common.
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// Parity Bridges Common 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 Bridges Common 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 Bridges Common. If not, see <http://www.gnu.org/licenses/>.
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use crate::{chain::Chain, client::Client};
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use async_std::sync::{Arc, RwLock};
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use async_trait::async_trait;
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use codec::Decode;
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use relay_utils::metrics::{
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metric_name, register, F64SharedRef, Gauge, PrometheusError, Registry, StandaloneMetrics, F64,
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};
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use sp_core::storage::StorageKey;
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use sp_runtime::{traits::UniqueSaturatedInto, FixedPointNumber};
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use std::time::Duration;
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/// Storage value update interval (in blocks).
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const UPDATE_INTERVAL_IN_BLOCKS: u32 = 5;
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/// Metric that represents fixed-point runtime storage value as float gauge.
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#[derive(Clone, Debug)]
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pub struct FloatStorageValueMetric<C: Chain, T: Clone> {
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client: Client<C>,
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storage_key: StorageKey,
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maybe_default_value: Option<T>,
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metric: Gauge<F64>,
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shared_value_ref: F64SharedRef,
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}
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impl<C: Chain, T: Decode + FixedPointNumber> FloatStorageValueMetric<C, T> {
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/// Create new metric.
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pub fn new(
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registry: &Registry,
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prefix: Option<&str>,
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client: Client<C>,
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storage_key: StorageKey,
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maybe_default_value: Option<T>,
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name: String,
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help: String,
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) -> Result<Self, PrometheusError> {
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let shared_value_ref = Arc::new(RwLock::new(None));
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Ok(FloatStorageValueMetric {
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client,
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storage_key,
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maybe_default_value,
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metric: register(Gauge::new(metric_name(prefix, &name), help)?, registry)?,
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shared_value_ref,
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})
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}
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/// Get shared reference to metric value.
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pub fn shared_value_ref(&self) -> F64SharedRef {
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self.shared_value_ref.clone()
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}
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}
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#[async_trait]
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impl<C: Chain, T> StandaloneMetrics for FloatStorageValueMetric<C, T>
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where
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T: 'static + Decode + Send + Sync + FixedPointNumber,
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{
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fn update_interval(&self) -> Duration {
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C::AVERAGE_BLOCK_INTERVAL * UPDATE_INTERVAL_IN_BLOCKS
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}
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async fn update(&self) {
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let value = self
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.client
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.storage_value::<T>(self.storage_key.clone(), None)
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.await
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.map(|maybe_storage_value| {
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maybe_storage_value.or(self.maybe_default_value).map(|storage_value| {
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storage_value.into_inner().unique_saturated_into() as f64 /
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T::DIV.unique_saturated_into() as f64
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})
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})
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.map_err(drop);
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relay_utils::metrics::set_gauge_value(&self.metric, value);
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*self.shared_value_ref.write().await = value.ok().and_then(|x| x);
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}
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}
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