Mercurial > gemma
view pkg/imports/misc.go @ 5560:f2204f91d286
Join the log lines of imports to the log exports to recover data from them.
Used in SR export to extract information that where in the meta json
but now are only found in the log.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 09 Feb 2022 18:34:40 +0100 |
parents | 5c43427fc2bf |
children |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package imports import ( "context" "database/sql" "fmt" "strings" ) type stringCounter map[string]int func (sc stringCounter) String() string { var b strings.Builder for t, c := range sc { if b.Len() > 0 { b.WriteString(", ") } b.WriteString(fmt.Sprintf("%s: %d", t, c)) } return b.String() } // Savepoint is a function wrapper to hide the details // of managing database SAVEPOINTs. // If the returned function is called with a callback // the callback is run in a SAVEPOINT. // If the callback returns w/o an error or with sql.ErrNoRows the SAVEPOINT // is released. Otherwise the SAVEPOINT is rolled back. func Savepoint( ctx context.Context, tx *sql.Tx, name string, ) func(func() error) error { var ( savepoint = "SAVEPOINT " + name rollback = "ROLLBACK TO SAVEPOINT " + name release = "RELEASE SAVEPOINT " + name ) return func(fn func() error) (err error) { if _, err = tx.ExecContext(ctx, savepoint); err != nil { return } var done bool defer func() { if !done { _, err2 := tx.ExecContext(ctx, rollback) if err == nil { err = err2 } } }() // Release SAVEPOINT if statements run in fn returned no database error if err = fn(); err == nil || err == sql.ErrNoRows { done = true if _, err2 := tx.ExecContext(ctx, release); err2 != nil { err = err2 } } return } }