referrerpolicy=no-referrer-when-downgrade
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138

// Copyright (C) Parity Technologies (UK) Ltd.
// This file is part of Polkadot.

// Polkadot 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.

// Polkadot 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 Polkadot.  If not, see <http://www.gnu.org/licenses/>.

use polkadot_node_metrics::metrics::{self, prometheus};

#[derive(Clone)]
pub(crate) struct MetricsInner {
	pub(crate) chain_api_requests: prometheus::CounterVec<prometheus::U64>,
	pub(crate) block_number: prometheus::Histogram,
	pub(crate) block_header: prometheus::Histogram,
	pub(crate) block_weight: prometheus::Histogram,
	pub(crate) finalized_block_hash: prometheus::Histogram,
	pub(crate) finalized_block_number: prometheus::Histogram,
	pub(crate) ancestors: prometheus::Histogram,
}

/// Chain API metrics.
#[derive(Default, Clone)]
pub struct Metrics(pub(crate) Option<MetricsInner>);

impl Metrics {
	pub fn on_request(&self, succeeded: bool) {
		if let Some(metrics) = &self.0 {
			if succeeded {
				metrics.chain_api_requests.with_label_values(&["succeeded"]).inc();
			} else {
				metrics.chain_api_requests.with_label_values(&["failed"]).inc();
			}
		}
	}

	/// Provide a timer for `block_number` which observes on drop.
	pub fn time_block_number(&self) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
		self.0.as_ref().map(|metrics| metrics.block_number.start_timer())
	}

	/// Provide a timer for `block_header` which observes on drop.
	pub fn time_block_header(&self) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
		self.0.as_ref().map(|metrics| metrics.block_header.start_timer())
	}

	/// Provide a timer for `block_weight` which observes on drop.
	pub fn time_block_weight(&self) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
		self.0.as_ref().map(|metrics| metrics.block_weight.start_timer())
	}

	/// Provide a timer for `finalized_block_hash` which observes on drop.
	pub fn time_finalized_block_hash(
		&self,
	) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
		self.0.as_ref().map(|metrics| metrics.finalized_block_hash.start_timer())
	}

	/// Provide a timer for `finalized_block_number` which observes on drop.
	pub fn time_finalized_block_number(
		&self,
	) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
		self.0.as_ref().map(|metrics| metrics.finalized_block_number.start_timer())
	}

	/// Provide a timer for `ancestors` which observes on drop.
	pub fn time_ancestors(&self) -> Option<metrics::prometheus::prometheus::HistogramTimer> {
		self.0.as_ref().map(|metrics| metrics.ancestors.start_timer())
	}
}

impl metrics::Metrics for Metrics {
	fn try_register(registry: &prometheus::Registry) -> Result<Self, prometheus::PrometheusError> {
		let metrics = MetricsInner {
			chain_api_requests: prometheus::register(
				prometheus::CounterVec::new(
					prometheus::Opts::new(
						"polkadot_parachain_chain_api_requests_total",
						"Number of Chain API requests served.",
					),
					&["success"],
				)?,
				registry,
			)?,
			block_number: prometheus::register(
				prometheus::Histogram::with_opts(prometheus::HistogramOpts::new(
					"polkadot_parachain_chain_api_block_number",
					"Time spent within `chain_api::block_number`",
				))?,
				registry,
			)?,
			block_header: prometheus::register(
				prometheus::Histogram::with_opts(prometheus::HistogramOpts::new(
					"polkadot_parachain_chain_api_block_headers",
					"Time spent within `chain_api::block_headers`",
				))?,
				registry,
			)?,
			block_weight: prometheus::register(
				prometheus::Histogram::with_opts(prometheus::HistogramOpts::new(
					"polkadot_parachain_chain_api_block_weight",
					"Time spent within `chain_api::block_weight`",
				))?,
				registry,
			)?,
			finalized_block_hash: prometheus::register(
				prometheus::Histogram::with_opts(prometheus::HistogramOpts::new(
					"polkadot_parachain_chain_api_finalized_block_hash",
					"Time spent within `chain_api::finalized_block_hash`",
				))?,
				registry,
			)?,
			finalized_block_number: prometheus::register(
				prometheus::Histogram::with_opts(prometheus::HistogramOpts::new(
					"polkadot_parachain_chain_api_finalized_block_number",
					"Time spent within `chain_api::finalized_block_number`",
				))?,
				registry,
			)?,
			ancestors: prometheus::register(
				prometheus::Histogram::with_opts(prometheus::HistogramOpts::new(
					"polkadot_parachain_chain_api_ancestors",
					"Time spent within `chain_api::ancestors`",
				))?,
				registry,
			)?,
		};
		Ok(Metrics(Some(metrics)))
	}
}