boltdb support.

bolt/lib.go

@@ -0,0 +1,93 @@
+package bolt
+
+import (
+	"sync/atomic"
+
+	"github.com/boltdb/bolt"
+	"github.com/fiatjaf/eventstore"
+)
+
+const (
+	maxuint16 = 65535
+	maxuint32 = 4294967295
+)
+
+var (
+	bucketSettings   = []byte{99}
+	bucketRaw        = []byte{1}
+	bucketCreatedAt  = []byte{2}
+	bucketId         = []byte{3}
+	bucketKind       = []byte{4}
+	bucketPubkey     = []byte{5}
+	bucketPubkeyKind = []byte{6}
+	bucketTag        = []byte{7}
+	bucketTag32      = []byte{8}
+	bucketTagAddr    = []byte{9}
+)
+
+var _ eventstore.Store = (*BoltBackend)(nil)
+
+type BoltBackend struct {
+	Path     string
+	MaxLimit int
+
+	db *bolt.DB
+
+	lastId atomic.Uint32
+}
+
+func (b *BoltBackend) Init() error {
+	if b.MaxLimit == 0 {
+		b.MaxLimit = 500
+	}
+
+	// open boltdb
+	db, err := bolt.Open(b.Path, 0644, nil)
+	if err != nil {
+		return err
+	}
+	b.db = db
+
+	// open each bucket
+	if err := b.db.Update(func(txn *bolt.Tx) error {
+		if _, err := txn.CreateBucket(bucketSettings); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketRaw); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketCreatedAt); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketId); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketKind); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketPubkey); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketPubkeyKind); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketTag); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketTag32); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		if _, err := txn.CreateBucket(bucketTagAddr); err != nil && err != bolt.ErrBucketExists {
+			return err
+		}
+		return nil
+	}); err != nil {
+		return err
+	}
+
+	return b.runMigrations()
+}
+
+func (b *BoltBackend) Close() {
+	b.db.Close()
+}