60 lines
1.9 KiB
Rust
60 lines
1.9 KiB
Rust
use std::{collections::HashSet, mem::size_of, sync::Arc};
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use crate::{service, database::KeyValueDatabase, Result, utils};
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impl service::rooms::auth_chain::Data for KeyValueDatabase {
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fn get_cached_eventid_authchain(&self, key: &[u64]) -> Result<Option<Arc<HashSet<u64>>>> {
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// Check RAM cache
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if let Some(result) = self.auth_chain_cache.lock().unwrap().get_mut(key) {
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return Ok(Some(Arc::clone(result)));
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}
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// We only save auth chains for single events in the db
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if key.len() == 1 {
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// Check DB cache
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let chain = self.shorteventid_authchain
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.get(&key[0].to_be_bytes())?
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.map(|chain| {
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chain
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.chunks_exact(size_of::<u64>())
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.map(|chunk| {
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utils::u64_from_bytes(chunk).expect("byte length is correct")
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})
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.collect()
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});
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if let Some(chain) = chain {
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let chain = Arc::new(chain);
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// Cache in RAM
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self.auth_chain_cache
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.lock()
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.unwrap()
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.insert(vec![key[0]], Arc::clone(&chain));
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return Ok(Some(chain));
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}
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}
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Ok(None)
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}
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fn cache_auth_chain(&self, key: Vec<u64>, auth_chain: Arc<HashSet<u64>>) -> Result<()> {
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// Only persist single events in db
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if key.len() == 1 {
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self.shorteventid_authchain.insert(
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&key[0].to_be_bytes(),
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&auth_chain
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.iter()
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.flat_map(|s| s.to_be_bytes().to_vec())
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.collect::<Vec<u8>>(),
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)?;
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}
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// Cache in RAM
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self.auth_chain_cache.lock().unwrap().insert(key, auth_chain);
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Ok(())
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}
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}
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