Method get_or_create

nodedb-mem/src/collection_arena.rs:72–84

Return (or create) a dedicated arena for `(tenant_id, collection)`. Idempotent: calling twice with the same key returns the same handle.

(&self, tenant_id: u64, collection: &str)

    ///
    /// Idempotent: calling twice with the same key returns the same handle.
    pub fn get_or_create(&self, tenant_id: u64, collection: &str) -> Result<CollectionArenaHandle> {
        let key = (tenant_id, collection.to_string());
        let mut guard = self
            .inner
            .lock()
            .map_err(|_| MemError::Jemalloc("collection arena registry lock poisoned".into()))?;
        if let Some(h) = guard.handles.get(&key) {
            return Ok(h.clone());
        }
        let handle = allocate_handle(tenant_id, collection);
        guard.handles.insert(key, handle.clone());
        Ok(handle)
    }

    /// Look up an existing handle without creating one. Returns `None` when
    /// the collection has no dedicated arena yet.