42 lines
1 KiB
Rust
42 lines
1 KiB
Rust
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/// Connection metadata required to query from, or apply transactions to, a Mentat store.
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///
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/// Owned data for the volatile parts (generation and partition map), and `Arc` for the infrequently
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/// changing parts (schema) that we want to share across threads.
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///
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/// See https://github.com/mozilla/mentat/wiki/Thoughts:-modeling-db-conn-in-Rust.
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use std::sync::{
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Arc,
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};
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use mentat_core::{
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Schema,
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};
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use mentat_db::{
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PartitionMap,
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};
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use mentat_db::cache::{
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SQLiteAttributeCache,
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};
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pub struct Metadata {
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pub generation: u64,
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pub partition_map: PartitionMap,
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pub schema: Arc<Schema>,
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pub attribute_cache: SQLiteAttributeCache,
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}
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impl Metadata {
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// Intentionally not public.
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pub fn new(generation: u64, partition_map: PartitionMap, schema: Arc<Schema>, cache: SQLiteAttributeCache) -> Metadata {
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Metadata {
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generation: generation,
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partition_map: partition_map,
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schema: schema,
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attribute_cache: cache,
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}
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}
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}
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