55 lines
1.6 KiB
Rust
55 lines
1.6 KiB
Rust
//! A module providing the `JsonRpcErrorCount` metric.
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use ethers::providers::ProviderError;
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use serde::Serialize;
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use std::ops::Deref;
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/// A metric counting how many times an expression typed std `Result` as
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/// returned an `Err` variant.
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///
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/// This is a light-weight metric.
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///
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/// By default, `ErrorCount` uses a lock-free `u64` `Counter`, which makes sense
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/// in multithread scenarios. Non-threaded applications can gain performance by
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/// using a `std::cell:Cell<u64>` instead.
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#[derive(Clone, Default, Debug, Serialize)]
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pub struct JsonRpcErrorCount<C: Counter = AtomicInt<u64>>(pub C);
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impl<C: Counter, T> Metric<Result<T, ProviderError>> for JsonRpcErrorCount<C> {}
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impl<C: Counter> Enter for JsonRpcErrorCount<C> {
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type E = ();
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fn enter(&self) {}
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}
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impl<C: Counter, T> OnResult<Result<T, ProviderError>> for JsonRpcErrorCount<C> {
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/// Unlike the default ErrorCount, this one does not increment for internal jsonrpc errors
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/// TODO: count errors like this on another helper
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fn on_result(&self, _: (), r: &Result<T, ProviderError>) -> Advice {
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match r {
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Ok(_) => {}
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Err(ProviderError::JsonRpcClientError(_)) => {
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self.0.incr();
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}
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Err(_) => {
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// TODO: count jsonrpc errors
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}
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}
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Advice::Return
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}
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}
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impl<C: Counter> Clear for JsonRpcErrorCount<C> {
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fn clear(&self) {
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self.0.clear()
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}
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}
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impl<C: Counter> Deref for JsonRpcErrorCount<C> {
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type Target = C;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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