72c97434b0
adjusted to make building sqlite happy again Signed-off-by: Jason Volk <jason@zemos.net> Signed-off-by: strawberry <strawberry@puppygock.gay>
68 lines
2 KiB
Rust
68 lines
2 KiB
Rust
use std::{future::Future, pin::Pin, sync::Arc};
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use super::Config;
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use crate::Result;
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#[cfg(feature = "sqlite")]
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pub mod sqlite;
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#[cfg(feature = "rocksdb")]
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pub(crate) mod rocksdb;
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#[cfg(any(feature = "sqlite", feature = "rocksdb"))]
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pub(crate) mod watchers;
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pub(crate) trait KeyValueDatabaseEngine: Send + Sync {
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fn open(config: &Config) -> Result<Self>
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where
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Self: Sized;
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fn open_tree(&self, name: &'static str) -> Result<Arc<dyn KvTree>>;
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fn flush(&self) -> Result<()>;
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fn cleanup(&self) -> Result<()> { Ok(()) }
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fn memory_usage(&self) -> Result<String> {
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Ok("Current database engine does not support memory usage reporting.".to_owned())
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}
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#[allow(dead_code)]
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fn clear_caches(&self) {}
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}
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pub(crate) trait KvTree: Send + Sync {
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fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>>;
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#[allow(dead_code)]
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#[cfg(feature = "rocksdb")]
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fn multi_get(
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&self, _iter: Vec<(&Arc<rust_rocksdb::BoundColumnFamily<'_>>, Vec<u8>)>,
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) -> Vec<std::result::Result<Option<Vec<u8>>, rust_rocksdb::Error>> {
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unimplemented!()
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}
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fn insert(&self, key: &[u8], value: &[u8]) -> Result<()>;
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fn insert_batch(&self, iter: &mut dyn Iterator<Item = (Vec<u8>, Vec<u8>)>) -> Result<()>;
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fn remove(&self, key: &[u8]) -> Result<()>;
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#[allow(dead_code)]
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#[cfg(feature = "rocksdb")]
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fn remove_batch(&self, _iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> { unimplemented!() }
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fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a>;
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fn iter_from<'a>(&'a self, from: &[u8], backwards: bool) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a>;
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fn increment(&self, key: &[u8]) -> Result<Vec<u8>>;
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fn increment_batch(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()>;
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fn scan_prefix<'a>(&'a self, prefix: Vec<u8>) -> Box<dyn Iterator<Item = (Vec<u8>, Vec<u8>)> + 'a>;
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fn watch_prefix<'a>(&'a self, prefix: &[u8]) -> Pin<Box<dyn Future<Output = ()> + Send + 'a>>;
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fn clear(&self) -> Result<()> {
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for (key, _) in self.iter() {
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self.remove(&key)?;
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}
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Ok(())
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}
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}
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