98 lines
2.3 KiB
Rust
98 lines
2.3 KiB
Rust
//! Stores a LIVE SELECT query definition on the table
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use crate::key::category::Categorise;
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use crate::key::category::Category;
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use derive::Key;
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use serde::{Deserialize, Serialize};
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use uuid::Uuid;
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/// Lv is used to track a live query and is cluster independent, i.e. it is tied with a ns/db/tb combo without the cl.
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/// The live statement includes the node id, so lq can be derived purely from an lv.
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///
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/// The value of the lv is the statement.
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#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Serialize, Deserialize, Key)]
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#[non_exhaustive]
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pub struct Lq<'a> {
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__: u8,
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_a: u8,
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pub ns: &'a str,
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_b: u8,
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pub db: &'a str,
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_c: u8,
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pub tb: &'a str,
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_d: u8,
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_e: u8,
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_f: u8,
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#[serde(with = "uuid::serde::compact")]
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pub lq: Uuid,
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}
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pub fn new<'a>(ns: &'a str, db: &'a str, tb: &'a str, lq: Uuid) -> Lq<'a> {
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Lq::new(ns, db, tb, lq)
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}
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pub fn prefix(ns: &str, db: &str, tb: &str) -> Vec<u8> {
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let mut k = super::all::new(ns, db, tb).encode().unwrap();
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k.extend_from_slice(b"!lq\x00");
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k
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}
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pub fn suffix(ns: &str, db: &str, tb: &str) -> Vec<u8> {
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let mut k = super::all::new(ns, db, tb).encode().unwrap();
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k.extend_from_slice(b"!lq\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00");
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k
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}
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impl Categorise for Lq<'_> {
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fn categorise(&self) -> Category {
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Category::TableLiveQuery
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}
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}
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impl<'a> Lq<'a> {
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pub fn new(ns: &'a str, db: &'a str, tb: &'a str, lq: Uuid) -> Self {
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Self {
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__: b'/',
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_a: b'*',
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ns,
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_b: b'*',
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db,
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_c: b'*',
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tb,
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_d: b'!',
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_e: b'l',
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_f: b'q',
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lq,
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}
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}
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}
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#[cfg(test)]
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mod tests {
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#[test]
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fn key() {
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use super::*;
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#[rustfmt::skip]
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let live_query_id = Uuid::from_bytes([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]);
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let val = Lq::new("testns", "testdb", "testtb", live_query_id);
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let enc = Lq::encode(&val).unwrap();
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assert_eq!(
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enc,
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b"/*testns\x00*testdb\x00*testtb\x00!lq\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10"
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);
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let dec = Lq::decode(&enc).unwrap();
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assert_eq!(val, dec);
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}
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#[test]
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fn prefix() {
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let val = super::prefix("testns", "testdb", "testtb");
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assert_eq!(val, b"/*testns\x00*testdb\x00*testtb\x00!lq\x00")
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}
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#[test]
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fn suffix() {
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let val = super::suffix("testns", "testdb", "testtb");
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assert_eq!(val, b"/*testns\x00*testdb\x00*testtb\x00!lq\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00")
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}
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}
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