Trait Code 

pub trait Code {
    // Required methods
    fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>;
    fn decode(reader: &mut impl Read) -> Result<Self, CodeError>
       where Self: Sized;
    fn estimated_size(&self) -> usize;
}

Encode/decode trait for key and value.

Code is required while working with foyer hybrid cache.

Some general types has already implemented Code by foyer, but the user needs to implement it for complex types.

Or, the user can enable serde feature for foyer. Then all types that implements serde::Serialize and serde::de::DeserializeOwned will be automatically implemented for Code.

Required Methods

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

Encode the object into a writer.

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

where Self: Sized,

Decode the object from a reader.

fn estimated_size(&self) -> usize

Estimated serialized size of the object.

The estimated serialized size is used by selector between different disk cache engines.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Code for bool

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

where Self: Sized,

fn estimated_size(&self) -> usize

impl Code for f32

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for f64

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for i8

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for i16

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for i32

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for i64

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for i128

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for isize

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for u8

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for u16

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for u32

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for u64

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for u128

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for usize

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

fn estimated_size(&self) -> usize

impl Code for String

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

where Self: Sized,

fn estimated_size(&self) -> usize

impl Code for Vec<u8>

fn encode(&self, writer: &mut impl Write) -> Result<(), CodeError>

fn decode(reader: &mut impl Read) -> Result<Self, CodeError>

where Self: Sized,

fn estimated_size(&self) -> usize

Implementors