-
Notifications
You must be signed in to change notification settings - Fork 175
/
epoch_commits.go
69 lines (57 loc) · 1.87 KB
/
epoch_commits.go
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
package badger
import (
"github.com/dgraph-io/badger/v2"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/module"
"github.com/onflow/flow-go/module/metrics"
"github.com/onflow/flow-go/storage/badger/operation"
)
type EpochCommits struct {
db *badger.DB
cache *Cache
}
func NewEpochCommits(collector module.CacheMetrics, db *badger.DB) *EpochCommits {
store := func(key interface{}, val interface{}) func(*badger.Txn) error {
id := key.(flow.Identifier)
commit := val.(*flow.EpochCommit)
return operation.SkipDuplicates(operation.InsertEpochCommit(id, commit))
}
retrieve := func(key interface{}) func(*badger.Txn) (interface{}, error) {
id := key.(flow.Identifier)
var commit flow.EpochCommit
return func(tx *badger.Txn) (interface{}, error) {
err := operation.RetrieveEpochCommit(id, &commit)(tx)
return &commit, err
}
}
ec := &EpochCommits{
db: db,
cache: newCache(collector,
withLimit(4*flow.DefaultTransactionExpiry),
withStore(store),
withRetrieve(retrieve),
withResource(metrics.ResourceEpochCommit)),
}
return ec
}
func (ec *EpochCommits) StoreTx(commit *flow.EpochCommit) func(tx *badger.Txn) error {
return ec.cache.Put(commit.ID(), commit)
}
func (ec *EpochCommits) retrieveTx(commitID flow.Identifier) func(tx *badger.Txn) (*flow.EpochCommit, error) {
return func(tx *badger.Txn) (*flow.EpochCommit, error) {
val, err := ec.cache.Get(commitID)(tx)
if err != nil {
return nil, err
}
return val.(*flow.EpochCommit), nil
}
}
// TODO: can we remove this method? Its not contained in the interface.
func (ec *EpochCommits) Store(commit *flow.EpochCommit) error {
return operation.RetryOnConflict(ec.db.Update, ec.StoreTx(commit))
}
func (ec *EpochCommits) ByID(commitID flow.Identifier) (*flow.EpochCommit, error) {
tx := ec.db.NewTransaction(false)
defer tx.Discard()
return ec.retrieveTx(commitID)(tx)
}