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/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under both the MIT license found in the
* LICENSE-MIT file in the root directory of this source tree and the Apache
* License, Version 2.0 found in the LICENSE-APACHE file in the root directory
* of this source tree.
*/
// This module defines only macros which don't show up on module level
// documentation anyway so hide it.
#![doc(hidden)]
#[doc(hidden)]
pub mod common_macro_prelude {
pub use std::sync::Arc;
pub use std::time::Duration;
pub use once_cell::sync::Lazy;
pub use perthread::PerThread;
pub use perthread::ThreadMap;
pub use stats_traits::dynamic_stat_types::DynamicStat;
pub use stats_traits::dynamic_stat_types::DynamicStatSync;
pub use stats_traits::field_stat_types::FieldStat;
pub use stats_traits::field_stat_types::FieldStatThreadLocal;
pub use stats_traits::stat_types::BoxCounter;
pub use stats_traits::stat_types::BoxHistogram;
pub use stats_traits::stat_types::BoxLocalCounter;
pub use stats_traits::stat_types::BoxLocalHistogram;
pub use stats_traits::stat_types::BoxLocalTimeseries;
pub use stats_traits::stat_types::BoxSingletonCounter;
pub use stats_traits::stat_types::BoxTimeseries;
pub use stats_traits::stats_manager::AggregationType::*;
pub use stats_traits::stats_manager::BoxStatsManager;
pub use stats_traits::stats_manager::BucketConfig;
pub use stats_traits::stats_manager::StatsManager;
pub use crate::create_singleton_counter;
pub use crate::create_stats_manager;
pub use crate::thread_local_aggregator::create_map;
}
/// The macro to define STATS module that contains static variables, one per
/// counter you want to export. This is the main and recommended way to interact
/// with statistics provided by this crate. If non empty prefix is passed then
/// the exported counter name will be "{prefix}.{name}"
///
/// Examples:
/// ```
/// use stats::prelude::*;
/// use fbinit::FacebookInit;
///
/// define_stats! {
/// prefix = "my.test.counters";
/// manual_c: singleton_counter(),
/// test_c: counter(),
/// test_c2: counter("test_c.two"),
/// test_t: timeseries(Sum, Average),
/// test_t2: timeseries("test_t.two"; Sum, Average),
/// test_h: histogram(1, 0, 1000, Sum; P 99; P 50),
/// dtest_c: dynamic_counter("test_c.{}", (job: u64)),
/// dtest_t: dynamic_timeseries("test_t.{}", (region: &'static str); Rate, Sum),
/// dtest_t2: dynamic_timeseries("test_t.two.{}.{}", (job: u64, region: &'static str); Count),
/// dtest_h: dynamic_histogram("test_h.{}", (region: &'static str); 1, 0, 1000, Sum; P 99),
/// test_qs: quantile_stat("test_qs"; Count, Sum, Average; P 95, P 99; Duration::from_secs(60)),
/// test_qs_two: quantile_stat(Count, Sum, Average; P 95; Duration::from_secs(60)),
/// test_dynqs: dynamic_quantile_stat("test_dynqs_{}", (num: i32); Count, Sum, Average; P 95, P 99; Duration::from_secs(60)),
/// }
///
/// #[allow(non_snake_case)]
/// mod ALT_STATS {
/// use stats::define_stats;
/// define_stats! {
/// test_t: timeseries(Sum, Average),
/// test_t2: timeseries("test.two"; Sum, Average),
/// }
/// pub use self::STATS::*;
/// }
///
/// # #[allow(clippy::needless_doctest_main)]
/// #[fbinit::main]
/// fn main(fb: FacebookInit) {
/// STATS::manual_c.set_value(fb, 1);
/// STATS::test_c.increment_value(1);
/// STATS::test_c2.increment_value(100);
/// STATS::test_t.add_value(1);
/// STATS::test_t2.add_value_aggregated(79, 10); // Add 79 and note it came from 10 samples
/// STATS::test_h.add_value(1);
/// STATS::test_h.add_repeated_value(1, 44); // 44 times repeat adding 1
/// STATS::dtest_c.increment_value(7, (1000,));
/// STATS::dtest_t.add_value(77, ("lla",));
/// STATS::dtest_t2.add_value_aggregated(81, 12, (7, "lla"));
/// STATS::dtest_h.add_value(2, ("frc",));
///
/// ALT_STATS::test_t.add_value(1);
/// ALT_STATS::test_t2.add_value(1);
/// }
/// ```
///
/// # Reference
///
/// ## `singleton_counter`, `counter`
///
/// **DEPRECATED:** Use `timeseries` instead.
///
/// Raw counter types. These take an optional key parameter - if it is not
/// specified, then it's derived from the stat field name.
///
/// ## `timeseries`
/// The general syntax for `timeseries` is:
/// ```text
/// timeseries(<optional key>; <list of aggregations>; [optional intervals])
/// ```
///
/// If "optional key" is omitted then key is derived from the stat key name;
/// otherwise it's a string literal.
///
/// "List of aggregations" is a `,`-separated list of
/// [`AggregationType`](stats_traits::stats_manager::AggregationType) enum
/// values.
///
/// "Optional intervals" is a `,`-separated list of [`Duration`s](std::time::Duration). It
/// specifies over what time periods the aggregations aggregate. If not
/// specified, it typically defaults to 60 seconds.
///
/// This maps to a call to
/// [`StatsManager::create_timeseries`](stats_traits::stats_manager::StatsManager::create_histogram).
///
/// ## `histogram`
///
/// **DEPRECATED:** Use `quantile_stat` instead.
///
/// The general syntax for `histogram` is:
/// ```text
/// histogram(<optional key>; bucket-width, min, max, <list of aggregations>; <P XX percentiles>)
/// ```
/// If "optional key" is omitted then key is derived from the stat key name;
/// otherwise it's a string literal.
///
/// `bucket-width` specifies what range of values are accumulated into each
/// bucket; the larger it is the fewer buckets there are.
///
/// `min` and `max` specify the min and max of the expected range of samples.
/// Samples outside this range will be aggregated into out-of-range buckets,
/// which means they're not lost entirely but they lead to inaccurate stats.
///
/// Together the min, max and bucket width parameters determine how many buckets
/// are created.
///
/// "List of aggregations" is a `,`-separated list of
/// [`AggregationType`](stats_traits::stats_manager::AggregationType) enum
/// values.
///
/// Percentiles are specified as `P NN` in a `;`-separated list, such as `P 20;
/// P 50; P 90; P 99`...
///
/// This maps to a call to
/// [`StatsManager::create_histogram`](stats_traits::stats_manager::StatsManager::create_histogram).
///
/// ## `quantile_stat`
/// The general syntax for `quantile_stat` is:
/// ```text
/// quantile_stat(<optional key>; <list of aggregations>; <P XX percentiles>; <list of intervals>)
/// ```
///
/// "List of aggregations" is a `,`-separated list of
/// [`AggregationType`](stats_traits::stats_manager::AggregationType) enum
/// values.
///
/// Percentiles are specified as `P NN` or `P NN.N` in a `,`-separated list, such as `P 20,
/// P 50, P 90, P 99`...
/// You can also use floating point values as well such as `P 95.0, P 99.0, P 99.99`...
/// Please note that you provide "percentiles" instead of rates such as 0.95 like C++ API
///
/// "List of intervals" is a `,`-separated list of [`Duration`s](std::time::Duration). It
/// specifies over what time periods the aggregations aggregate.
///
/// `quantile_stat` measures the same statistics as `histogram`, but it
/// doesn't require buckets to be defined ahead of time. See [this workplace post](https://fb.workplace.com/notes/marc-celani/a-new-approach-to-quantile-estimation-in-c-services/212892662822481)
/// for more.
///
/// This maps to a call to
/// [`StatsManager::create_quantile_stat`](stats_traits::stats_manager::StatsManager::create_quantile_stat).
///
/// ## `dynamic_counter`, `dynamic_timeseries`, `dynamic_histogram`, `dynamic_quantile_stat`
///
/// These are equivalent to the corresponding `counter`/`timeseries`/`histogram`/`quantile_stat`
/// above, except that they allow the key to have a dynamic component. The key
/// is no longer optional, but is instead specified with `<format-string>,
/// (variable:type, ...)`. The format string is standard
/// [`format!`](std::format).
#[macro_export]
macro_rules! define_stats {
// Fill the optional prefix with empty string, all matching is repeated here to avoid the
// recursion limit reached error in case the macro is misused.
($( $name:ident: $stat_type:tt($( $params:tt )*), )*) =>
(define_stats!(prefix = ""; $( $name: $stat_type($( $params )*), )*););
(prefix = $prefix:expr;
$( $name:ident: $stat_type:tt($( $params:tt )*), )*) => (
#[allow(non_snake_case, non_upper_case_globals, unused_imports)]
pub(crate) mod STATS {
use $crate::macros::common_macro_prelude::*;
static STATS_MAP: Lazy<Arc<ThreadMap<BoxStatsManager>>> = Lazy::new(|| create_map());
static STATS_MANAGER: Lazy<BoxStatsManager> = Lazy::new(|| create_stats_manager());
thread_local! {
static TL_STATS: PerThread<BoxStatsManager> =
STATS_MAP.register(create_stats_manager());
}
$( $crate::__define_stat!($prefix; $name: $stat_type($( $params )*)); )*
}
);
}
#[doc(hidden)]
#[macro_export]
macro_rules! __define_key_generator {
($name:ident($prefix:expr, $key:expr; $( $placeholder:ident: $type:ty ),+)) => (
fn $name(&($( ref $placeholder, )+): &($( $type, )+)) -> String {
let key = format!($key, $( $placeholder ),+);
if $prefix.is_empty() {
key
} else {
[$prefix, &key].join(".")
}
}
);
}
#[doc(hidden)]
#[macro_export]
macro_rules! __define_stat {
($prefix:expr; $name:ident: singleton_counter()) => (
$crate::__define_stat!($prefix; $name: singleton_counter(stringify!($name)));
);
($prefix:expr; $name:ident: singleton_counter($key:expr)) => (
pub static $name: Lazy<BoxSingletonCounter> = Lazy::new(|| create_singleton_counter($crate::__create_stat_key!($prefix, $key).to_string()));
);
($prefix:expr; $name:ident: counter()) => (
$crate::__define_stat!($prefix; $name: counter(stringify!($name)));
);
($prefix:expr; $name:ident: counter($key:expr)) => (
thread_local! {
pub static $name: BoxLocalCounter = TL_STATS.with(|stats| {
stats.create_counter(&$crate::__create_stat_key!($prefix, $key))
});
}
);
// There are 4 inputs we use to produce a timeseries: the the prefix, the name (used in
// STATS::name), the key (used in ODS or to query the key), the export types (SUM, RATE, etc.),
// and the intervals (e.g. 60, 600). The key defaults to the name, and the intervals default to
// whatever default Folly uses (which happens to be 60, 600, 3600);
($prefix:expr; $name:ident: timeseries($( $aggregation_type:expr ),*)) => (
$crate::__define_stat!($prefix; $name: timeseries(stringify!($name); $( $aggregation_type ),*));
);
($prefix:expr; $name:ident: timeseries($key:expr; $( $aggregation_type:expr ),*)) => (
$crate::__define_stat!($prefix; $name: timeseries($key; $( $aggregation_type ),* ; ));
);
($prefix:expr; $name:ident: timeseries($key:expr; $( $aggregation_type:expr ),* ; $( $interval: expr ),*)) => (
thread_local! {
pub static $name: BoxLocalTimeseries = TL_STATS.with(|stats| {
stats.create_timeseries(
&$crate::__create_stat_key!($prefix, $key),
&[$( $aggregation_type ),*],
&[$( $interval ),*]
)
});
}
);
($prefix:expr;
$name:ident: histogram($bucket_width:expr,
$min:expr,
$max:expr
$(, $aggregation_type:expr )*
$(; P $percentile:expr )*)) => (
$crate::__define_stat!($prefix;
$name: histogram(stringify!($name);
$bucket_width,
$min,
$max
$(, $aggregation_type )*
$(; P $percentile )*));
);
($prefix:expr;
$name:ident: histogram($key:expr;
$bucket_width:expr,
$min:expr,
$max:expr
$(, $aggregation_type:expr )*
$(; P $percentile:expr )*)) => (
thread_local! {
pub static $name: BoxLocalHistogram = TL_STATS.with(|stats| {
stats.create_histogram(
&$crate::__create_stat_key!($prefix, $key),
&[$( $aggregation_type ),*],
BucketConfig {
width: $bucket_width,
min: $min,
max: $max,
},
&[$( $percentile ),*])
});
}
);
($prefix:expr;
$name:ident: quantile_stat(
$( $aggregation_type:expr ),*
; $( P $percentile:expr ),*
; $( $interval:expr ),*
)) => (
$crate::__define_stat!($prefix;
$name: quantile_stat(stringify!($name)
; $( $aggregation_type ),*
; $( P $percentile ),*
; $( $interval ),*));
);
($prefix:expr;
$name:ident: quantile_stat($key:expr
; $( $aggregation_type:expr ),*
; $( P $percentile:expr ),*
; $( $interval:expr ),*
)) => (
pub static $name: Lazy<BoxHistogram> = Lazy::new(|| {
STATS_MANAGER.create_quantile_stat(
&$crate::__create_stat_key!($prefix, $key),
&[$( $aggregation_type ),*],
&[$( $percentile as f32 ),*],
&[$( $interval ),*],
)
});
);
($prefix:expr;
$name:ident: dynamic_singleton_counter($key:expr, ($( $placeholder:ident: $type:ty ),+))) => (
thread_local! {
pub static $name: DynamicStat<($( $type, )+), BoxSingletonCounter> = {
$crate::__define_key_generator!(
__key_generator($prefix, $key; $( $placeholder: $type ),+)
);
fn __stat_generator(key: &str) -> BoxSingletonCounter {
create_singleton_counter(key.to_string())
}
DynamicStat::new(__key_generator, __stat_generator)
}
}
);
($prefix:expr;
$name:ident: dynamic_counter($key:expr, ($( $placeholder:ident: $type:ty ),+))) => (
thread_local! {
pub static $name: DynamicStat<($( $type, )+), BoxLocalCounter> = {
$crate::__define_key_generator!(
__key_generator($prefix, $key; $( $placeholder: $type ),+)
);
fn __stat_generator(key: &str) -> BoxLocalCounter {
TL_STATS.with(|stats| {
stats.create_counter(key)
})
}
DynamicStat::new(__key_generator, __stat_generator)
}
}
);
($prefix:expr;
$name:ident: dynamic_timeseries($key:expr, ($( $placeholder:ident: $type:ty ),+);
$( $aggregation_type:expr ),*)) => (
$crate::__define_stat!(
$prefix;
$name: dynamic_timeseries(
$key,
($( $placeholder: $type ),+);
$( $aggregation_type ),* ;
)
);
);
($prefix:expr;
$name:ident: dynamic_timeseries($key:expr, ($( $placeholder:ident: $type:ty ),+);
$( $aggregation_type:expr ),* ; $( $interval:expr ),*)) => (
thread_local! {
pub static $name: DynamicStat<($( $type, )+), BoxLocalTimeseries> = {
$crate::__define_key_generator!(
__key_generator($prefix, $key; $( $placeholder: $type ),+)
);
fn __stat_generator(key: &str) -> BoxLocalTimeseries {
TL_STATS.with(|stats| {
stats.create_timeseries(key, &[$( $aggregation_type ),*], &[$( $interval ),*])
})
}
DynamicStat::new(__key_generator, __stat_generator)
};
}
);
($prefix:expr;
$name:ident: dynamic_histogram($key:expr, ($( $placeholder:ident: $type:ty ),+);
$bucket_width:expr,
$min:expr,
$max:expr
$(, $aggregation_type:expr )*
$(; P $percentile:expr )*)) => (
thread_local! {
pub static $name: DynamicStat<($( $type, )+), BoxLocalHistogram> = {
$crate::__define_key_generator!(
__key_generator($prefix, $key; $( $placeholder: $type ),+)
);
fn __stat_generator(key: &str) -> BoxLocalHistogram {
TL_STATS.with(|stats| {
stats.create_histogram(key,
&[$( $aggregation_type ),*],
BucketConfig {
width: $bucket_width,
min: $min,
max: $max,
},
&[$( $percentile ),*])
})
}
DynamicStat::new(__key_generator, __stat_generator)
};
}
);
($prefix:expr;
$name:ident: dynamic_quantile_stat($key:expr, ($( $placeholder:ident: $type:ty ),+) ;
$( $aggregation_type:expr ),* ;
$( P $percentile:expr ),* ;
$( $interval:expr ),*)) => (
pub static $name: Lazy<DynamicStatSync<($( $type, )+), BoxHistogram>> = Lazy::new(|| {
$crate::__define_key_generator!(
__key_generator($prefix, $key; $( $placeholder: $type ),+)
);
fn __stat_generator(key: &str) -> BoxHistogram {
STATS_MANAGER.create_quantile_stat(
key,
&[$( $aggregation_type ),*],
&[$( $percentile as f32 ),*],
&[$( $interval ),*],
)
}
DynamicStatSync::new(__key_generator, __stat_generator)
});
);
}
#[doc(hidden)]
#[macro_export]
macro_rules! __create_stat_key {
($prefix:expr, $key:expr) => {{
use std::borrow::Cow;
if $prefix.is_empty() {
Cow::Borrowed($key)
} else {
Cow::Owned(format!("{}.{}", $prefix, $key))
}
}};
}
/// Define a group of stats with dynamic names all parameterized by the same set of parameters.
/// The intention is that when setting up a structure for some entity with associated stats, then
/// the type produced by this macro can be included in that structure, and initialized with the
/// appropriate name(s). This is more efficient than using single static "dynamic_" versions of
/// the counters.
///
/// ```
/// use stats::prelude::*;
///
/// define_stats_struct! {
/// // struct name, key prefix template, key template params
/// MyThingStat("things.{}.{}", mything_name: String, mything_idx: usize),
/// cache_miss: counter() // default name from the field
/// }
///
/// struct MyThing {
/// stats: MyThingStat,
/// }
///
/// impl MyThing {
/// fn new(somename: String, someidx: usize) -> Self {
/// MyThing {
/// stats: MyThingStat::new(somename, someidx),
/// //...
/// }
/// }
/// }
/// #
/// # fn main() {}
/// ```
#[macro_export]
macro_rules! define_stats_struct {
// Handle trailing comma
($name:ident ($key:expr, $($pr_name:ident: $pr_type:ty),*) ,
$( $stat_name:ident: $stat_type:tt($( $params:tt )*) , )+) => {
define_stats_struct!($name ( $key, $($pr_name: $pr_type),*),
$($stat_name: $stat_type($($params)*)),* );
};
// Handle no params
($name:ident ($key:expr) ,
$( $stat_name:ident: $stat_type:tt($( $params:tt )*) ),*) => {
define_stats_struct!($name ( $key, ),
$($stat_name: $stat_type($($params)*)),* );
};
($name:ident ($key:expr) ,
$( $stat_name:ident: $stat_type:tt($( $params:tt )*) , )+) => {
define_stats_struct!($name ( $key, ),
$($stat_name: $stat_type($($params)*)),* );
};
// Define struct and its methods.
($name:ident ($key:expr, $($pr_name:ident: $pr_type:ty),*) ,
$( $stat_name:ident: $stat_type:tt($( $params:tt )*) ),*) => {
#[allow(missing_docs)]
pub struct $name {
$(pub $stat_name: $crate::__struct_field_type!($stat_type), )*
}
impl $name {
#[allow(unused_imports, missing_docs, non_upper_case_globals)]
pub fn new($($pr_name: $pr_type),*) -> $name {
use $crate::macros::common_macro_prelude::*;
static STATS_MAP: Lazy<Arc<ThreadMap<BoxStatsManager>>> = Lazy::new(|| create_map());
static STATS_MANAGER: Lazy<BoxStatsManager> = Lazy::new(|| create_stats_manager());
thread_local! {
static TL_STATS: PerThread<BoxStatsManager> =
STATS_MAP.register(create_stats_manager());
}
$(
$crate::__struct_thread_local_init! { $stat_name, $stat_type, $($params)* }
)*
let __prefix = format!($key, $($pr_name),*);
$name {
$($stat_name: $crate::__struct_field_init!(__prefix, $stat_name, $stat_type, $($params)*)),*
}
}
}
impl std::fmt::Debug for $name {
fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(fmt, "<{}>", stringify!($name))
}
}
}
}
#[macro_export]
#[doc(hidden)]
macro_rules! __struct_field_type {
(singleton_counter) => {
$crate::macros::common_macro_prelude::BoxSingletonCounter
};
(counter) => {
$crate::macros::common_macro_prelude::BoxCounter
};
(timeseries) => {
$crate::macros::common_macro_prelude::BoxTimeseries
};
(histogram) => {
$crate::macros::common_macro_prelude::BoxHistogram
};
(quantile_stat) => {
$crate::macros::common_macro_prelude::BoxHistogram
};
}
#[macro_export]
#[doc(hidden)]
macro_rules! __struct_thread_local_init {
($name:ident, singleton_counter, ) => {
$crate::__struct_thread_local_init!($name, singleton_counter, stringify!($name))
};
($name:ident, singleton_counter, $key:expr) => {};
($name:ident, counter, ) => {
$crate::__struct_thread_local_init! { $name, counter, stringify!($name)}
};
($name:ident, counter, $key:expr) => {
$crate::__struct_thread_local_init! { $name, counter, $key ; }
};
($name:ident, counter, $key:expr ; ) => {
thread_local! {
static $name: FieldStatThreadLocal<BoxLocalCounter> = {
fn __stat_generator(key: &str) -> BoxLocalCounter {
TL_STATS.with(|stats| {
stats.create_counter(key)
})
}
FieldStatThreadLocal::new(__stat_generator)
};
}
};
($name:ident, timeseries, $( $aggregation_type:expr ),+) => {
$crate::__struct_thread_local_init! { $name, timeseries, stringify!($name) ; $($aggregation_type),*}
};
($name:ident, timeseries, $key:expr ; $( $aggregation_type:expr ),* ) => {
$crate::__struct_thread_local_init! { $name, timeseries, $key ; $($aggregation_type),* ;}
};
($name:ident, timeseries, $key:expr ; $( $aggregation_type:expr ),* ; $( $interval:expr ),* ) => {
thread_local! {
static $name: FieldStatThreadLocal<BoxLocalTimeseries> = {
fn __stat_generator(key: &str) -> BoxLocalTimeseries {
TL_STATS.with(|stats| {
stats.create_timeseries(key, &[$( $aggregation_type ),*], &[$( $interval ),*])
})
}
FieldStatThreadLocal::new(__stat_generator)
};
}
};
($name:ident, histogram,
$bucket_width:expr, $min:expr, $max:expr $(, $aggregation_type:expr)*
$(; P $percentile:expr )*) => {
$crate::__struct_thread_local_init! { $name, histogram,
stringify!($name) ; $bucket_width, $min, $max $(, $aggregation_type)*
$(; P $percentile)* }
};
($name:ident, histogram, $key:expr ;
$bucket_width:expr, $min:expr, $max:expr $(, $aggregation_type:expr)*
$(; P $percentile:expr )*) => {
thread_local! {
static $name: FieldStatThreadLocal<BoxLocalHistogram> = {
fn __stat_generator(key: &str) -> BoxLocalHistogram {
TL_STATS.with(|stats| {
stats.create_histogram(key,
&[$( $aggregation_type ),*],
BucketConfig {
width: $bucket_width,
min: $min,
max: $max,
},
&[$( $percentile ),*])
})
}
FieldStatThreadLocal::new(__stat_generator)
};
}
};
($name:ident, quantile_stat,
$( $aggregation_type:expr ),*
; $( P $percentile:expr ),*
; $( $interval:expr ),*) => ();
($name:ident, quantile_stat, $key:expr
; $( $aggregation_type:expr ),*
; $( P $percentile:expr ),*
; $( $interval:expr ),*) => ();
}
#[macro_export]
#[doc(hidden)]
macro_rules! __struct_field_init {
($prefix:expr, $name:ident, singleton_counter, ) => {
$crate::__struct_field_init!($prefix, $name, singleton_counter, stringify!($name))
};
($prefix:expr, $name:ident, singleton_counter, $key:expr) => {{ create_singleton_counter(format!("{}.{}", $prefix, $key)) }};
($prefix:expr, $name:ident, counter, ) => {
$crate::__struct_field_init!($prefix, $name, counter, stringify!($name) ;)
};
($prefix:expr, $name:ident, counter, $key:expr) => {
$crate::__struct_field_init!($prefix, $name, counter, $key ;)
};
($prefix:expr, $name:ident, counter, $key:expr ; $(params:tt)*) => {{ Box::new(FieldStat::new(&$name, format!("{}.{}", $prefix, $key))) }};
($prefix:expr, $name:ident, timeseries, $( $aggregation_type:expr ),+) => {
$crate::__struct_field_init!($prefix, $name, timeseries, stringify!($name) ; $($aggregation_type),*)
};
($prefix:expr, $name:ident, timeseries, $key:expr ; $( $aggregation_type:expr ),* ) => {
$crate::__struct_field_init!($prefix, $name, timeseries, $key ; $($aggregation_type),* ;)
};
($prefix:expr, $name:ident, timeseries, $key:expr ; $( $aggregation_type:expr ),* ; $( $interval:expr ),* ) => {{
Box::new(FieldStat::new(&$name, format!("{}.{}", $prefix, $key)))
}};
($prefix:expr, $name:ident, histogram,
$bucket_width:expr, $min:expr, $max:expr $(, $aggregation_type:expr)*
$(; P $percentile:expr )*) => {
$crate::__struct_field_init!($prefix, $name, histogram,
stringify!($name) ; $bucket_width, $min, $max $(, $aggregation_type)*
$(; P $percentile)*)
};
($prefix:expr, $name:ident, histogram, $key:expr ;
$bucket_width:expr, $min:expr, $max:expr $(, $aggregation_type:expr)*
$(; P $percentile:expr )*) => {{ Box::new(FieldStat::new(&$name, format!("{}.{}", $prefix, $key))) }};
($prefix:expr, $name:ident, quantile_stat,
$( $aggregation_type:expr ),*
; $( P $percentile:expr ),*
; $( $interval:expr ),*) => {
$crate::__struct_field_init!($prefix, $name, quantile_stat,
stringify!($name)
; $( $aggregation_type ),*
; $( P $percentile ),*
; $( $interval ),*)
};
($prefix:expr, $name:ident, quantile_stat,
$key:expr
; $( $aggregation_type:expr ),*
; $( P $percentile:expr ),*
; $( $interval:expr ),*) => {{
STATS_MANAGER.create_quantile_stat(
&$crate::__create_stat_key!($prefix, $key),
&[$( $aggregation_type ),*],
&[$( $percentile as f32 ),*],
&[$( $interval ),*],
)
}};
}