reifydb_core/key/
namespace_handler.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright (c) 2025 ReifyDB
3
4use crate::{
5	encoded::key::{EncodedKey, EncodedKeyRange},
6	interface::catalog::id::{HandlerId, NamespaceId},
7	key::{EncodableKey, KeyKind},
8	util::encoding::keycode::{deserializer::KeyDeserializer, serializer::KeySerializer},
9};
10
11#[derive(Debug, Clone, PartialEq)]
12pub struct NamespaceHandlerKey {
13	pub namespace: NamespaceId,
14	pub handler: HandlerId,
15}
16
17impl NamespaceHandlerKey {
18	pub fn new(namespace: NamespaceId, handler: HandlerId) -> Self {
19		Self {
20			namespace,
21			handler,
22		}
23	}
24
25	pub fn encoded(namespace: impl Into<NamespaceId>, handler: impl Into<HandlerId>) -> EncodedKey {
26		Self::new(namespace.into(), handler.into()).encode()
27	}
28
29	pub fn full_scan(namespace: NamespaceId) -> EncodedKeyRange {
30		EncodedKeyRange::start_end(Some(Self::link_start(namespace)), Some(Self::link_end(namespace)))
31	}
32
33	fn link_start(namespace: NamespaceId) -> EncodedKey {
34		let mut serializer = KeySerializer::with_capacity(9);
35		serializer.extend_u8(Self::KIND as u8).extend_u64(namespace);
36		serializer.to_encoded_key()
37	}
38
39	fn link_end(namespace: NamespaceId) -> EncodedKey {
40		let mut serializer = KeySerializer::with_capacity(9);
41		serializer.extend_u8(Self::KIND as u8).extend_u64(*namespace - 1);
42		serializer.to_encoded_key()
43	}
44}
45
46impl EncodableKey for NamespaceHandlerKey {
47	const KIND: KeyKind = KeyKind::NamespaceHandler;
48
49	fn encode(&self) -> EncodedKey {
50		let mut serializer = KeySerializer::with_capacity(17);
51		serializer.extend_u8(Self::KIND as u8).extend_u64(self.namespace).extend_u64(self.handler);
52		serializer.to_encoded_key()
53	}
54
55	fn decode(key: &EncodedKey) -> Option<Self> {
56		let mut de = KeyDeserializer::from_bytes(key.as_slice());
57
58		let kind: KeyKind = de.read_u8().ok()?.try_into().ok()?;
59		if kind != Self::KIND {
60			return None;
61		}
62
63		let namespace = de.read_u64().ok()?;
64		let handler = de.read_u64().ok()?;
65
66		Some(Self {
67			namespace: NamespaceId(namespace),
68			handler: HandlerId(handler),
69		})
70	}
71}
72
73#[cfg(test)]
74pub mod tests {
75	use super::{EncodableKey, NamespaceHandlerKey};
76	use crate::interface::catalog::id::{HandlerId, NamespaceId};
77
78	#[test]
79	fn test_encode_decode() {
80		let key = NamespaceHandlerKey {
81			namespace: NamespaceId(0xABCD),
82			handler: HandlerId(0x123456789ABCDEF0),
83		};
84		let encoded = key.encode();
85		let expected: Vec<u8> =
86			vec![0xD0, 0x3F, 0x54, 0x32, 0x00, 0xED, 0xCB, 0xA9, 0x87, 0x65, 0x43, 0x21, 0x0F];
87		assert_eq!(encoded.as_slice(), expected);
88
89		let decoded = NamespaceHandlerKey::decode(&encoded).unwrap();
90		assert_eq!(decoded.namespace, NamespaceId(0xABCD));
91		assert_eq!(decoded.handler, HandlerId(0x123456789ABCDEF0));
92	}
93
94	#[test]
95	fn test_order_preserving() {
96		let key1 = NamespaceHandlerKey {
97			namespace: NamespaceId::SYSTEM,
98			handler: HandlerId(100),
99		};
100		let key2 = NamespaceHandlerKey {
101			namespace: NamespaceId::SYSTEM,
102			handler: HandlerId(200),
103		};
104		let key3 = NamespaceHandlerKey {
105			namespace: NamespaceId::DEFAULT,
106			handler: HandlerId(1),
107		};
108
109		let encoded1 = key1.encode();
110		let encoded2 = key2.encode();
111		let encoded3 = key3.encode();
112
113		assert!(encoded3 < encoded2, "ordering not preserved");
114		assert!(encoded2 < encoded1, "ordering not preserved");
115	}
116}
reifydb_core/key/namespace_handler.rs

reifydb_core/key/
namespace_handler.rs
