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

// Copyright 2019 Conflux Foundation. All rights reserved.
// Conflux is free software and distributed under GNU General Public License.
// See http://www.gnu.org/licenses/

#[derive(MallocSizeOfDerive, Clone)]
pub struct KvdbRocksdb {
    pub kvdb: Arc<Database>,
    pub col: u32,
}

pub struct KvdbRocksDbTransaction {
    pending: DBTransaction,
    col: u32,
}

impl KeyValueDbTraitRead for KvdbRocksdb {
    fn get(&self, key: &[u8]) -> Result<Option<Box<[u8]>>> {
        Ok(self
            .kvdb
            .get(self.col, key)?
            .map(|db_value| db_value.into_boxed_slice()))
    }
}

mark_kvdb_multi_reader!(KvdbRocksdb);

impl KeyValueDbTypes for KvdbRocksdb {
    type ValueType = Box<[u8]>;
}

impl KeyValueDbTrait for KvdbRocksdb {
    fn delete(&self, key: &[u8]) -> Result<Option<Option<Box<[u8]>>>> {
        random_crash_if_enabled("rocksdb delete");
        let mut transaction = self.kvdb.transaction();
        transaction.delete(self.col, key);
        self.kvdb.write(transaction)?;
        Ok(None)
    }

    fn put(
        &self, key: &[u8], value: &[u8],
    ) -> Result<Option<Option<Box<[u8]>>>> {
        random_crash_if_enabled("rocksdb put");
        let mut transaction = self.kvdb.transaction();
        transaction.put(self.col, key, value);
        self.kvdb.write(transaction)?;
        Ok(None)
    }
}

impl KeyValueDbTypes for KvdbRocksDbTransaction {
    type ValueType = Box<[u8]>;
}

impl KeyValueDbTraitSingleWriter for KvdbRocksDbTransaction {
    fn delete(&mut self, key: &[u8]) -> Result<Option<Option<Box<[u8]>>>> {
        self.pending.delete(self.col, key);
        Ok(None)
    }

    fn put(
        &mut self, key: &[u8], value: &[u8],
    ) -> Result<Option<Option<Box<[u8]>>>> {
        self.pending.put(self.col, key, value);
        Ok(None)
    }
}

impl KeyValueDbTraitOwnedRead for KvdbRocksDbTransaction {
    fn get_mut(&mut self, _key: &[u8]) -> Result<Option<Box<[u8]>>> {
        // DBTransaction doesn't implement get method, so the user shouldn't
        // rely on this method.
        unreachable!()
    }
}

impl KeyValueDbTransactionTrait for KvdbRocksDbTransaction {
    fn commit(&mut self, db: &dyn Any) -> Result<()> {
        random_crash_if_enabled("rocksdb commit");
        match db.downcast_ref::<KvdbRocksdb>() {
            Some(as_kvdb_rocksdb) => {
                let wrapped_ops = DBTransaction {
                    ops: self.pending.ops.clone(),
                };
                let result = as_kvdb_rocksdb.kvdb.write(wrapped_ops);
                match result {
                    Ok(_) => {
                        self.pending.ops.clear();
                        Ok(())
                    }
                    Err(e) => bail!(e),
                }
            }
            None => {
                unreachable!();
            }
        }
    }

    fn revert(&mut self) -> Result<()> {
        self.pending.ops = vec![];
        Ok(())
    }

    fn restart(
        &mut self, _immediate_write: bool, no_revert: bool,
    ) -> Result<()> {
        if !no_revert {
            self.revert()?;
        }
        Ok(())
    }
}

impl Drop for KvdbRocksDbTransaction {
    fn drop(&mut self) {
        // No-op
    }
}

impl KeyValueDbTraitTransactional for KvdbRocksdb {
    type TransactionType = KvdbRocksDbTransaction;

    fn start_transaction(
        &self, _immediate_write: bool,
    ) -> Result<Self::TransactionType> {
        Ok(KvdbRocksDbTransaction {
            pending: self.kvdb.transaction(),
            col: self.col,
        })
    }
}

impl DeltaDbTrait for KvdbRocksdb {}

use super::super::{
    super::storage_db::{delta_db_manager::DeltaDbTrait, key_value_db::*},
    errors::*,
};
use kvdb::DBTransaction;
use kvdb_rocksdb::Database;
use malloc_size_of_derive::MallocSizeOf as MallocSizeOfDerive;
use random_crash::random_crash_if_enabled;
use std::{any::Any, sync::Arc};