Enum CompressionType 

#[non_exhaustive]
#[repr(u8)]
pub enum CompressionType {
    None = 0,
    Gzip = 1,
    Snappy = 2,
    Lz4 = 3,
    Zstd = 4,
}

Codec identifier matching the lowest three bits of Kafka’s record-batch attribute byte.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

None = 0

Gzip = 1

Snappy = 2

Lz4 = 3

Zstd = 4

Implementations

impl CompressionType

pub fn from_attribute_bits(b: u8) -> Option<Self>

Decode the lowest three bits of a Kafka record-batch attribute byte.

The method returns None for codec ids outside 0..=4.

pub fn as_attribute_bits(self) -> u8

Encode this codec into the lowest three bits of an attribute byte.

pub const fn name(self) -> &'static str

The codec name that Kafka uses in compression.type.

pub const fn default_level(self) -> Option<i32>

Kafka’s default compression level of the codec (CompressionType.defaultLevel), or None when the codec has no levels.

pub const fn min_level(self) -> Option<i32>

Kafka’s lowest compression level of the codec (CompressionType.minLevel), or None when the codec has no levels.

pub const fn max_level(self) -> Option<i32>

Kafka’s highest compression level of the codec (CompressionType.maxLevel), or None when the codec has no levels.

pub fn check_level(self, level: i32) -> Result<(), CompressionError>

Check level as Kafka’s CompressionType.levelValidator does (KIP-390).

Gzip accepts 1 to 9, and also -1, which is the zlib default. Lz4 and zstd accept their range only.

Errors

Returns CompressionError::InvalidLevel with Kafka’s message when the level is outside the range, or when the codec has no levels.

Trait Implementations

impl Clone for CompressionType

fn clone(&self) -> CompressionType

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for CompressionType

impl Debug for CompressionType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for CompressionType

impl Hash for CompressionType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for CompressionType

fn eq(&self, other: &CompressionType) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CompressionType