1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
use async_trait::async_trait;
use serde::{Deserialize, Serialize};
use garage_table::crdt::CRDT;
use garage_table::*;
use garage_util::error::Error;
use crate::key_table::PermissionSet;
use model010::bucket_table as prev;
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
pub struct Bucket {
// Primary key
pub name: String,
pub state: crdt::LWW<BucketState>,
}
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
pub enum BucketState {
Deleted,
Present(crdt::LWWMap<String, PermissionSet>),
}
impl CRDT for BucketState {
fn merge(&mut self, o: &Self) {
match o {
BucketState::Deleted => *self = BucketState::Deleted,
BucketState::Present(other_ak) => {
if let BucketState::Present(ak) = self {
ak.merge(other_ak);
}
}
}
}
}
impl Bucket {
pub fn new(name: String) -> Self {
let ret = Bucket {
name,
state: crdt::LWW::new(BucketState::Present(crdt::LWWMap::new())),
};
ret
}
pub fn is_deleted(&self) -> bool {
*self.state.get() == BucketState::Deleted
}
pub fn authorized_keys(&self) -> &[(String, u64, PermissionSet)] {
match self.state.get() {
BucketState::Deleted => &[],
BucketState::Present(ak) => ak.items(),
}
}
}
impl Entry<EmptyKey, String> for Bucket {
fn partition_key(&self) -> &EmptyKey {
&EmptyKey
}
fn sort_key(&self) -> &String {
&self.name
}
fn merge(&mut self, other: &Self) {
self.state.merge(&other.state);
}
}
pub struct BucketTable;
#[async_trait]
impl TableSchema for BucketTable {
type P = EmptyKey;
type S = String;
type E = Bucket;
type Filter = DeletedFilter;
async fn updated(&self, _old: Option<Self::E>, _new: Option<Self::E>) -> Result<(), Error> {
Ok(())
}
fn matches_filter(entry: &Self::E, filter: &Self::Filter) -> bool {
filter.apply(entry.is_deleted())
}
fn try_migrate(bytes: &[u8]) -> Option<Self::E> {
let old = match rmp_serde::decode::from_read_ref::<_, prev::Bucket>(bytes) {
Ok(x) => x,
Err(_) => return None,
};
if old.deleted {
Some(Bucket {
name: old.name,
state: crdt::LWW::migrate_from_raw(old.timestamp, BucketState::Deleted),
})
} else {
let mut keys = crdt::LWWMap::new();
for ak in old.authorized_keys() {
keys.merge(&crdt::LWWMap::migrate_from_raw_item(
ak.key_id.clone(),
ak.timestamp,
PermissionSet {
allow_read: ak.allow_read,
allow_write: ak.allow_write,
},
));
}
Some(Bucket {
name: old.name,
state: crdt::LWW::migrate_from_raw(old.timestamp, BucketState::Present(keys)),
})
}
}
}
|
