38 lines
1.0 KiB
Go
38 lines
1.0 KiB
Go
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package migration_01_to_11
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import "github.com/coreos/bbolt"
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var (
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// metaBucket stores all the meta information concerning the state of
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// the database.
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metaBucket = []byte("metadata")
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// dbVersionKey is a boltdb key and it's used for storing/retrieving
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// current database version.
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dbVersionKey = []byte("dbp")
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)
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// Meta structure holds the database meta information.
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type Meta struct {
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// DbVersionNumber is the current schema version of the database.
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DbVersionNumber uint32
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}
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// putMeta is an internal helper function used in order to allow callers to
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// re-use a database transaction. See the publicly exported PutMeta method for
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// more information.
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func putMeta(meta *Meta, tx *bbolt.Tx) error {
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metaBucket, err := tx.CreateBucketIfNotExists(metaBucket)
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if err != nil {
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return err
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}
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return putDbVersion(metaBucket, meta)
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}
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func putDbVersion(metaBucket *bbolt.Bucket, meta *Meta) error {
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scratch := make([]byte, 4)
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byteOrder.PutUint32(scratch, meta.DbVersionNumber)
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return metaBucket.Put(dbVersionKey, scratch)
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}
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