guard delayed tx cache
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e70c55bf86
commit
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@ -3,6 +3,7 @@ package sql
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import (
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"context"
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"reflect"
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"sync"
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"time"
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"github.com/cerc-io/plugeth-statediff/indexer/database/metrics"
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@ -15,6 +16,7 @@ const copyFromCheckLimit = 100
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type DelayedTx struct {
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cache []interface{}
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db Database
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sync.RWMutex
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}
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type cachedStmt struct {
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sql string
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@ -27,6 +29,8 @@ type copyFrom struct {
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rows [][]interface{}
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}
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type result int64
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func (cf *copyFrom) appendRows(rows [][]interface{}) {
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cf.rows = append(cf.rows, rows...)
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}
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@ -44,6 +48,8 @@ func (tx *DelayedTx) QueryRow(ctx context.Context, sql string, args ...interface
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}
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func (tx *DelayedTx) findPrevCopyFrom(tableName []string, columnNames []string, limit int) (*copyFrom, int) {
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tx.RLock()
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defer tx.RUnlock()
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for pos, count := len(tx.cache)-1, 0; pos >= 0 && count < limit; pos, count = pos-1, count+1 {
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prevCopy, ok := tx.cache[pos].(*copyFrom)
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if ok && prevCopy.matches(tableName, columnNames) {
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@ -59,15 +65,19 @@ func (tx *DelayedTx) CopyFrom(ctx context.Context, tableName []string, columnNam
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"current", len(prevCopy.rows), "new", len(rows), "distance", distance)
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prevCopy.appendRows(rows)
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} else {
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tx.Lock()
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tx.cache = append(tx.cache, ©From{tableName, columnNames, rows})
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tx.Unlock()
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}
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return 0, nil
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}
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func (tx *DelayedTx) Exec(ctx context.Context, sql string, args ...interface{}) (Result, error) {
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tx.Lock()
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tx.cache = append(tx.cache, cachedStmt{sql, args})
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return nil, nil
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defer tx.Unlock()
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return result(0), nil
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}
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func (tx *DelayedTx) Commit(ctx context.Context) error {
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@ -85,6 +95,8 @@ func (tx *DelayedTx) Commit(ctx context.Context) error {
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rollback(ctx, base)
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}
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}()
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tx.Lock()
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defer tx.Unlock()
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for _, item := range tx.cache {
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switch item := item.(type) {
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case *copyFrom:
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@ -105,6 +117,13 @@ func (tx *DelayedTx) Commit(ctx context.Context) error {
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}
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func (tx *DelayedTx) Rollback(ctx context.Context) error {
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tx.Lock()
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defer tx.Unlock()
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tx.cache = nil
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return nil
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}
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// RowsAffected satisfies sql.Result
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func (r result) RowsAffected() (int64, error) {
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return int64(r), nil
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}
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