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feat: Add Serde impl for CpuQuantity and MemoryQuantity #724

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merged 5 commits into from
Jan 23, 2024
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feat: Add Serde impl for CpuQuantity and MemoryQuantity #724

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b174a48
Add Serde impl for CpuQuantity
Techassi Jan 23, 2024
3982c61
Add Serde impl for MemoryQuantity
Techassi Jan 23, 2024
1e76591
Adjust test names
Techassi Jan 23, 2024
505e73c
Update changelog
Techassi Jan 23, 2024
0fd6760
Fix typo
Techassi Jan 23, 2024
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6 changes: 6 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.

## [Unreleased]

### Added

- Add Serde `Deserialize` and `Serialize` support for `CpuQuantity` and `MemoryQuantity` ([#724]).

[#724]: https://github.com/stackabletech/operator-rs/pull/724

## [0.62.0] - 2024-01-19

### Added
Expand Down
96 changes: 96 additions & 0 deletions src/cpu.rs
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@@ -1,10 +1,12 @@
use std::{
fmt::Display,
iter::Sum,
ops::{Add, AddAssign, Div, Mul, MulAssign},
str::FromStr,
};

use k8s_openapi::apimachinery::pkg::api::resource::Quantity;
use serde::{de::Visitor, Deserialize, Serialize};

use crate::error::{Error, OperatorResult};

Expand Down Expand Up @@ -33,6 +35,50 @@ impl CpuQuantity {
}
}

impl Serialize for CpuQuantity {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
serializer.serialize_str(&self.to_string())
}
}

impl<'de> Deserialize<'de> for CpuQuantity {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
struct CpuQuantityVisitor;

impl<'de> Visitor<'de> for CpuQuantityVisitor {
type Value = CpuQuantity;

fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
formatter.write_str("a valid CPU quantiry")
}

fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
CpuQuantity::from_str(v).map_err(serde::de::Error::custom)
}
}

deserializer.deserialize_str(CpuQuantityVisitor)
}
}

impl Display for CpuQuantity {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self.millis < 1000 {
true => write!(f, "{}m", self.millis),
false => write!(f, "{}", self.as_cpu_count()),
}
}
}

impl FromStr for CpuQuantity {
type Err = Error;

Expand Down Expand Up @@ -185,4 +231,54 @@ mod test {
let result = CpuQuantity::from_str(s);
assert!(result.is_err());
}

#[rstest]
#[case(CpuQuantity::from_millis(10000), "10")]
#[case(CpuQuantity::from_millis(1500), "1.5")]
#[case(CpuQuantity::from_millis(999), "999m")]
#[case(CpuQuantity::from_millis(500), "500m")]
#[case(CpuQuantity::from_millis(100), "100m")]
#[case(CpuQuantity::from_millis(2000), "2")]
#[case(CpuQuantity::from_millis(1000), "1")]
fn test_display_to_string(#[case] cpu: CpuQuantity, #[case] expected: &str) {
assert_eq!(cpu.to_string(), expected)
}

#[rstest]
#[case(CpuQuantity::from_millis(10000), "cpu: '10'\n")]
#[case(CpuQuantity::from_millis(1500), "cpu: '1.5'\n")]
#[case(CpuQuantity::from_millis(999), "cpu: 999m\n")]
#[case(CpuQuantity::from_millis(500), "cpu: 500m\n")]
#[case(CpuQuantity::from_millis(100), "cpu: 100m\n")]
#[case(CpuQuantity::from_millis(2000), "cpu: '2'\n")]
#[case(CpuQuantity::from_millis(1000), "cpu: '1'\n")]
fn test_serialize(#[case] cpu: CpuQuantity, #[case] expected: &str) {
#[derive(Serialize)]
struct Cpu {
cpu: CpuQuantity,
}

let cpu = Cpu { cpu };
let output = serde_yaml::to_string(&cpu).unwrap();

assert_eq!(output, expected);
}

#[rstest]
#[case("cpu: '10'", CpuQuantity::from_millis(10000))]
#[case("cpu: '1.5'", CpuQuantity::from_millis(1500))]
#[case("cpu: 999m", CpuQuantity::from_millis(999))]
#[case("cpu: 500m", CpuQuantity::from_millis(500))]
#[case("cpu: 100m", CpuQuantity::from_millis(100))]
#[case("cpu: 2", CpuQuantity::from_millis(2000))]
#[case("cpu: 1", CpuQuantity::from_millis(1000))]
fn test_deserialize(#[case] input: &str, #[case] expected: CpuQuantity) {
#[derive(Deserialize)]
struct Cpu {
cpu: CpuQuantity,
}

let cpu: Cpu = serde_yaml::from_str(input).unwrap();
assert_eq!(cpu.cpu, expected);
}
}
138 changes: 103 additions & 35 deletions src/memory.rs
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Expand Up @@ -9,6 +9,7 @@
//! For details on Kubernetes quantities see: <https://github.com/kubernetes/apimachinery/blob/master/pkg/api/resource/quantity.go>

use k8s_openapi::apimachinery::pkg::api::resource::Quantity;
use serde::{de::Visitor, Deserialize, Serialize};

use crate::error::{Error, OperatorResult};
use std::{
Expand Down Expand Up @@ -301,6 +302,66 @@ impl MemoryQuantity {
}
}

impl Serialize for MemoryQuantity {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
serializer.serialize_str(&self.to_string())
}
}

impl<'de> Deserialize<'de> for MemoryQuantity {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
struct MemoryQuantityVisitor;

impl<'de> Visitor<'de> for MemoryQuantityVisitor {
type Value = MemoryQuantity;

fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
formatter.write_str("a valid memory quantity")
}

fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
MemoryQuantity::from_str(v).map_err(serde::de::Error::custom)
}
}

deserializer.deserialize_str(MemoryQuantityVisitor)
}
}

impl FromStr for MemoryQuantity {
type Err = Error;

fn from_str(q: &str) -> OperatorResult<Self> {
let start_of_unit =
q.find(|c: char| c != '.' && !c.is_numeric())
.ok_or(Error::NoQuantityUnit {
value: q.to_owned(),
})?;
let (value, unit) = q.split_at(start_of_unit);
Ok(MemoryQuantity {
value: value.parse::<f32>().map_err(|_| Error::InvalidQuantity {
value: q.to_owned(),
})?,
unit: unit.parse()?,
})
}
}

impl Display for MemoryQuantity {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}{}", self.value, self.unit)
}
}

impl Mul<f32> for MemoryQuantity {
type Output = MemoryQuantity;

Expand Down Expand Up @@ -395,31 +456,6 @@ impl PartialEq for MemoryQuantity {

impl Eq for MemoryQuantity {}

impl FromStr for MemoryQuantity {
type Err = Error;

fn from_str(q: &str) -> OperatorResult<Self> {
let start_of_unit =
q.find(|c: char| c != '.' && !c.is_numeric())
.ok_or(Error::NoQuantityUnit {
value: q.to_owned(),
})?;
let (value, unit) = q.split_at(start_of_unit);
Ok(MemoryQuantity {
value: value.parse::<f32>().map_err(|_| Error::InvalidQuantity {
value: q.to_owned(),
})?,
unit: unit.parse()?,
})
}
}

impl Display for MemoryQuantity {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}{}", self.value, self.unit)
}
}

impl TryFrom<Quantity> for MemoryQuantity {
type Error = Error;

Expand Down Expand Up @@ -474,7 +510,7 @@ mod test {
#[case("1.2Gi")]
#[case("1.6Gi")]
#[case("1Gi")]
pub fn test_fmt(#[case] q: String) {
fn test_try_from_quantity(#[case] q: String) {
let m = MemoryQuantity::try_from(Quantity(q.clone())).unwrap();
let actual = format!("{m}");
assert_eq!(q, actual);
Expand All @@ -486,7 +522,7 @@ mod test {
#[case("2Mi", 0.8, "-Xmx1638k")]
#[case("1.5Gi", 0.8, "-Xmx1229m")]
#[case("2Gi", 0.8, "-Xmx1638m")]
pub fn test_to_java_heap(#[case] q: &str, #[case] factor: f32, #[case] heap: &str) {
fn test_to_java_heap(#[case] q: &str, #[case] factor: f32, #[case] heap: &str) {
#[allow(deprecated)] // allow use of the deprecated 'to_java_heap' function to test it
let actual = to_java_heap(&Quantity(q.to_owned()), factor).unwrap();
assert_eq!(heap, actual);
Expand All @@ -498,7 +534,7 @@ mod test {
#[case("1.2Gi", "1228m")]
#[case("1.6Gi", "1638m")]
#[case("1Gi", "1g")]
pub fn test_format_java(#[case] q: String, #[case] expected: String) {
fn test_format_java(#[case] q: String, #[case] expected: String) {
let m = MemoryQuantity::try_from(Quantity(q)).unwrap();
let actual = m.format_for_java().unwrap();
assert_eq!(expected, actual);
Expand All @@ -513,7 +549,7 @@ mod test {
#[case(2000f32, BinaryMultiple::Pebi, BinaryMultiple::Mebi, 2000f32*1024f32*1024f32*1024f32)]
#[case(2000f32, BinaryMultiple::Pebi, BinaryMultiple::Kibi, 2000f32*1024f32*1024f32*1024f32*1024f32)]
#[case(2000f32, BinaryMultiple::Exbi, BinaryMultiple::Pebi, 2000f32*1024f32)]
pub fn test_scale_to(
fn test_scale_to(
#[case] value: f32,
#[case] unit: BinaryMultiple,
#[case] target_unit: BinaryMultiple,
Expand All @@ -537,7 +573,7 @@ mod test {
#[case("2000Ki", 1.0, BinaryMultiple::Mebi, 1)]
#[case("4000Mi", 1.0, BinaryMultiple::Gibi, 3)]
#[case("4000Mi", 0.8, BinaryMultiple::Gibi, 3)]
pub fn test_to_java_heap_value(
fn test_to_java_heap_value(
#[case] q: &str,
#[case] factor: f32,
#[case] target_unit: BinaryMultiple,
Expand All @@ -555,7 +591,7 @@ mod test {
#[case("1000Mi", 1.0, BinaryMultiple::Gibi)]
#[case("1023Mi", 1.0, BinaryMultiple::Gibi)]
#[case("1024Mi", 0.8, BinaryMultiple::Gibi)]
pub fn test_to_java_heap_value_failure(
fn test_to_java_heap_value_failure(
#[case] q: &str,
#[case] factor: f32,
#[case] target_unit: BinaryMultiple,
Expand All @@ -570,7 +606,7 @@ mod test {
#[case("1Mi", "512Ki", "512Ki")]
#[case("2Mi", "512Ki", "1536Ki")]
#[case("2048Ki", "1Mi", "1024Ki")]
pub fn test_subtraction(#[case] lhs: &str, #[case] rhs: &str, #[case] res: &str) {
fn test_subtraction(#[case] lhs: &str, #[case] rhs: &str, #[case] res: &str) {
let lhs = MemoryQuantity::try_from(Quantity(lhs.to_owned())).unwrap();
let rhs = MemoryQuantity::try_from(Quantity(rhs.to_owned())).unwrap();
let expected = MemoryQuantity::try_from(Quantity(res.to_owned())).unwrap();
Expand All @@ -587,7 +623,7 @@ mod test {
#[case("1Mi", "512Ki", "1536Ki")]
#[case("2Mi", "512Ki", "2560Ki")]
#[case("2048Ki", "1Mi", "3072Ki")]
pub fn test_addition(#[case] lhs: &str, #[case] rhs: &str, #[case] res: &str) {
fn test_addition(#[case] lhs: &str, #[case] rhs: &str, #[case] res: &str) {
let lhs = MemoryQuantity::try_from(Quantity(lhs.to_owned())).unwrap();
let rhs = MemoryQuantity::try_from(Quantity(rhs.to_owned())).unwrap();
let expected = MemoryQuantity::try_from(Quantity(res.to_owned())).unwrap();
Expand All @@ -608,7 +644,7 @@ mod test {
#[case("100Ki", "101Ki", false)]
#[case("1Mi", "100Ki", true)]
#[case("2000Ki", "1Mi", true)]
pub fn test_comparison(#[case] lhs: &str, #[case] rhs: &str, #[case] res: bool) {
fn test_comparison(#[case] lhs: &str, #[case] rhs: &str, #[case] res: bool) {
let lhs = MemoryQuantity::try_from(Quantity(lhs.to_owned())).unwrap();
let rhs = MemoryQuantity::try_from(Quantity(rhs.to_owned())).unwrap();
assert_eq!(lhs > rhs, res)
Expand All @@ -619,9 +655,41 @@ mod test {
#[case("100Ki", "200Ki", false)]
#[case("1Mi", "1024Ki", true)]
#[case("1024Ki", "1Mi", true)]
pub fn test_eq(#[case] lhs: &str, #[case] rhs: &str, #[case] res: bool) {
fn test_eq(#[case] lhs: &str, #[case] rhs: &str, #[case] res: bool) {
let lhs = MemoryQuantity::try_from(Quantity(lhs.to_owned())).unwrap();
let rhs = MemoryQuantity::try_from(Quantity(rhs.to_owned())).unwrap();
assert_eq!(lhs == rhs, res)
}

#[rstest]
#[case(MemoryQuantity::from_mebi(1536.0), "memory: 1536Mi\n")]
#[case(MemoryQuantity::from_mebi(100.0), "memory: 100Mi\n")]
#[case(MemoryQuantity::from_gibi(10.0), "memory: 10Gi\n")]
#[case(MemoryQuantity::from_gibi(1.0), "memory: 1Gi\n")]
fn test_serialize(#[case] memory: MemoryQuantity, #[case] expected: &str) {
#[derive(Serialize)]
struct Memory {
memory: MemoryQuantity,
}

let memory = Memory { memory };
let output = serde_yaml::to_string(&memory).unwrap();

assert_eq!(output, expected);
}

#[rstest]
#[case("memory: 1536Mi", MemoryQuantity::from_mebi(1536.0))]
#[case("memory: 100Mi", MemoryQuantity::from_mebi(100.0))]
#[case("memory: 10Gi", MemoryQuantity::from_gibi(10.0))]
#[case("memory: 1Gi", MemoryQuantity::from_gibi(1.0))]
fn test_deserialize(#[case] input: &str, #[case] expected: MemoryQuantity) {
#[derive(Deserialize)]
struct Memory {
memory: MemoryQuantity,
}

let memory: Memory = serde_yaml::from_str(input).unwrap();
assert_eq!(memory.memory, expected);
}
}