armour 0.30.27

DDL and serialization for key-value storage
Documentation 
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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193

use std::{borrow::Borrow, fmt::Debug, ops::RangeBounds};

use armour_derive::armour_metrics;
use fjall::Slice;

use super::{ItemWithRaw, RawTree, helpers::*};
use crate::{Cid, DbError, DbResult, Entry, Record};

#[derive(derive_more::Debug)]
pub struct ReadTree<Item: Record> {
    pub(crate) raw: RawTree,
    pub(crate) phantom: std::marker::PhantomData<Item>,
}

impl<Item: Record> Clone for ReadTree<Item> {
    fn clone(&self) -> Self {
        Self {
            raw: self.raw.clone(),
            phantom: std::marker::PhantomData,
        }
    }
}

impl<Item> ReadTree<Item>
where
    Item: Record<Value = Slice> + Debug,
{
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    #[armour_metrics(prefix = "armour_logdb_tree", name = self.raw.static_name())]
    fn get_by_slice(&self, key: &[u8]) -> DbResult<Option<Item>> {
        let val = self.raw.tree.get(key)?;
        match val {
            Some(val) => Ok(Some(Item::deser_owned(val))),
            None => Ok(None),
        }
    }

    /// get value by id
    pub fn get(&self, id: impl Borrow<Item::SelfId> + Debug) -> DbResult<Option<Item>> {
        let key = Cid::encode(id.borrow());
        self.get_by_slice(key.as_ref())
    }

    /// get value by id or return not found
    pub fn get_or_err(&self, id: impl Borrow<Item::SelfId> + Debug) -> DbResult<Item> {
        let key = Cid::encode(id.borrow());
        self.get_by_slice(key.as_ref())
            .and_then(|item| item.ok_or(DbError::NotFound))
    }

    /// check exist by id
    #[doc(alias = "exists")]
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    #[armour_metrics(prefix = "armour_logdb_tree", name = self.raw.static_name())]
    pub fn contains(&self, id: impl Borrow<Item::SelfId> + Debug) -> DbResult<bool> {
        let key = Cid::encode(id.borrow());
        self.raw
            .tree
            .contains_key(key.as_ref())
            .map_err(DbError::from)
    }

    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    #[armour_metrics(prefix = "armour_logdb_tree", name = self.raw.static_name())]
    pub fn size_of(&self, id: impl Borrow<Item::SelfId> + Debug) -> DbResult<Option<u32>> {
        let key = Cid::encode(id.borrow());
        self.raw.tree.size_of(key.as_ref()).map_err(DbError::from)
    }

    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    #[armour_metrics(prefix = "armour_logdb_tree", name = self.raw.static_name())]
    pub fn first(&self) -> DbResult<Option<Entry<Item>>> {
        let val = self.raw.tree.first_key_value();
        match val {
            Some(val) => {
                let (key, val) = val.into_inner()?;
                let id = Item::deser_key(&key);
                let value = Item::deser_owned(val);
                Ok(Some(Entry::new(id, value)))
            }
            None => Ok(None),
        }
    }

    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    #[armour_metrics(prefix = "armour_logdb_tree", name = self.raw.static_name())]
    pub fn last(&self) -> DbResult<Option<Entry<Item>>> {
        let val = self.raw.tree.last_key_value();
        match val {
            Some(val) => {
                let (key, val) = val.into_inner()?;
                let id = Item::deser_key(&key);
                let value = Item::deser_owned(val);
                Ok(Some(Entry::new(id, value)))
            }
            None => Ok(None),
        }
    }

    /// get iterator for collection
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    pub fn iter(&self) -> super::IterTree<Entry<Item>> {
        counter!("armour_logdb_tree_iter_total", "name" => self.raw.name.clone()).increment(1);
        self.raw.tree.iter().filter_map(entry_filter_map::<Item>)
    }

    /// get iterator by prefix for collection
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    pub fn scan_prefix<P>(&self, prefix: P) -> super::IterTree<Entry<Item>>
    where
        P: AsRef<[u8]> + Debug,
    {
        counter!("armour_logdb_tree_scan_prefix_total", "name" => self.raw.name.clone())
            .increment(1);
        self.raw
            .tree
            .prefix(prefix)
            .filter_map(entry_filter_map::<Item>)
    }

    /// get iterator by prefix for collection
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    pub fn scan_prefix_key<P>(&self, prefix: P) -> super::IterTree<Item::SelfId>
    where
        P: AsRef<[u8]> + Debug,
    {
        counter!("armour_logdb_tree_scan_prefix_key_total", "name" => self.raw.name.clone())
            .increment(1);
        self.raw
            .tree
            .prefix(prefix)
            .filter_map(entry_key_filter_map::<Item>)
    }

    /// get iterator by range for collection
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    pub fn range_iter<K, R>(&self, range: R) -> super::IterTree<Entry<Item>>
    where
        K: AsRef<[u8]>,
        R: RangeBounds<K> + Debug,
    {
        counter!("armour_logdb_tree_range_iter_total", "name" => self.raw.name.clone())
            .increment(1);
        self.raw
            .tree
            .range(range)
            .filter_map(entry_filter_map::<Item>)
    }

    /// get iterator by prefix for collection
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    pub fn try_scan_prefix<P>(&self, prefix: P) -> super::TryIterTree<Entry<Item>>
    where
        P: AsRef<[u8]> + Debug,
    {
        counter!("armour_logdb_tree_try_scan_prefix_total", "name" => self.raw.name.clone())
            .increment(1);
        self.raw.tree.prefix(prefix).map(entry_map::<Item>)
    }

    /// get iterator by prefix for collection
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    pub fn try_scan_prefix_with_raw<P>(&self, prefix: P) -> super::TryIterTree<ItemWithRaw<Item>>
    where
        P: AsRef<[u8]> + Debug,
    {
        counter!("armour_logdb_tree_try_scan_prefix_with_raw_total", "name" => self.raw.name.clone()).increment(1);
        self.raw.tree.prefix(prefix).map(entry_map_with_raw::<Item>)
    }

    /// get iterator by range for collection
    /// if item error, return Error
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    pub fn try_range_iter<K, R>(self, range: R) -> super::TryIterTree<ItemWithRaw<Item>>
    where
        K: AsRef<[u8]>,
        R: RangeBounds<K> + Debug,
    {
        counter!("armour_logdb_tree_try_range_iter_total", "name" => self.raw.name.clone())
            .increment(1);
        self.raw.tree.range(range).map(entry_map_with_raw::<Item>)
    }

    /// iter without deserialize value
    #[instrument(level = "debug", skip_all, fields(name = Item::NAME))]
    pub fn iter_keys(&self) -> impl DoubleEndedIterator<Item = Item::SelfId> {
        counter!("armour_logdb_tree_iter_keys_total", "name" => self.raw.name.clone()).increment(1);
        self.raw
            .tree
            .iter()
            .filter_map(entry_key_filter_map::<Item>)
    }
}