forked from Deuxfleurs/garage
65 lines
1.4 KiB
Rust
65 lines
1.4 KiB
Rust
use async_trait::async_trait;
|
|
use serde::{Deserialize, Serialize};
|
|
|
|
use garage_util::data::*;
|
|
use garage_util::error::Error;
|
|
|
|
pub trait PartitionKey {
|
|
fn hash(&self) -> Hash;
|
|
}
|
|
|
|
impl PartitionKey for String {
|
|
fn hash(&self) -> Hash {
|
|
sha256sum(self.as_bytes())
|
|
}
|
|
}
|
|
|
|
impl PartitionKey for Hash {
|
|
fn hash(&self) -> Hash {
|
|
self.clone()
|
|
}
|
|
}
|
|
|
|
pub trait SortKey {
|
|
fn sort_key(&self) -> &[u8];
|
|
}
|
|
|
|
impl SortKey for String {
|
|
fn sort_key(&self) -> &[u8] {
|
|
self.as_bytes()
|
|
}
|
|
}
|
|
|
|
impl SortKey for Hash {
|
|
fn sort_key(&self) -> &[u8] {
|
|
self.as_slice()
|
|
}
|
|
}
|
|
|
|
pub trait Entry<P: PartitionKey, S: SortKey>:
|
|
PartialEq + Clone + Serialize + for<'de> Deserialize<'de> + Send + Sync
|
|
{
|
|
fn partition_key(&self) -> &P;
|
|
fn sort_key(&self) -> &S;
|
|
|
|
fn merge(&mut self, other: &Self);
|
|
}
|
|
|
|
#[async_trait]
|
|
pub trait TableSchema: Send + Sync {
|
|
type P: PartitionKey + Clone + PartialEq + Serialize + for<'de> Deserialize<'de> + Send + Sync;
|
|
type S: SortKey + Clone + Serialize + for<'de> Deserialize<'de> + Send + Sync;
|
|
type E: Entry<Self::P, Self::S>;
|
|
type Filter: Clone + Serialize + for<'de> Deserialize<'de> + Send + Sync;
|
|
|
|
// Action to take if not able to decode current version:
|
|
// try loading from an older version
|
|
fn try_migrate(_bytes: &[u8]) -> Option<Self::E> {
|
|
None
|
|
}
|
|
|
|
async fn updated(&self, old: Option<Self::E>, new: Option<Self::E>) -> Result<(), Error>;
|
|
fn matches_filter(_entry: &Self::E, _filter: &Self::Filter) -> bool {
|
|
true
|
|
}
|
|
}
|