97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
package ormtable
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import "github.com/cosmos/cosmos-sdk/orm/model/kv"
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type batchIndexCommitmentWriter struct {
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Backend
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commitmentWriter *batchStoreWriter
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indexWriter *batchStoreWriter
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}
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func newBatchIndexCommitmentWriter(store Backend) *batchIndexCommitmentWriter {
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return &batchIndexCommitmentWriter{
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Backend: store,
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// optimal array capacities are estimated here:
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commitmentWriter: &batchStoreWriter{
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ReadonlyStore: store.CommitmentStoreReader(),
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writes: make([]batchWriterEntry, 0, 2),
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},
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indexWriter: &batchStoreWriter{
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ReadonlyStore: store.IndexStoreReader(),
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writes: make([]batchWriterEntry, 0, 16),
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},
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}
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}
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func (w *batchIndexCommitmentWriter) CommitmentStore() kv.Store {
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return w.commitmentWriter
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}
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func (w *batchIndexCommitmentWriter) IndexStore() kv.Store {
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return w.indexWriter
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}
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// Write flushes any pending writes.
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func (w *batchIndexCommitmentWriter) Write() error {
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err := flushWrites(w.Backend.CommitmentStore(), w.commitmentWriter.writes)
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if err != nil {
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return err
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}
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err = flushWrites(w.Backend.IndexStore(), w.indexWriter.writes)
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if err != nil {
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return err
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}
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// clear writes
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w.Close()
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return err
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}
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func flushWrites(writer kv.Store, writes []batchWriterEntry) error {
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for _, write := range writes {
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if !write.delete {
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err := writer.Set(write.key, write.value)
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if err != nil {
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return err
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}
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} else {
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err := writer.Delete(write.key)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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// Close discards any pending writes and should generally be called using
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// a defer statement.
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func (w *batchIndexCommitmentWriter) Close() {
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w.commitmentWriter.writes = nil
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w.indexWriter.writes = nil
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}
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type batchWriterEntry struct {
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key, value []byte
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delete bool
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}
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type batchStoreWriter struct {
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kv.ReadonlyStore
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writes []batchWriterEntry
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}
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func (b *batchStoreWriter) Set(key, value []byte) error {
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b.writes = append(b.writes, batchWriterEntry{key: key, value: value})
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return nil
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}
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func (b *batchStoreWriter) Delete(key []byte) error {
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b.writes = append(b.writes, batchWriterEntry{key: key, delete: true})
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return nil
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}
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var _ Backend = &batchIndexCommitmentWriter{}
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