Mercurial > gemma
view pkg/imports/dmv.go @ 2455:54c9fe587fe6
Subdivide SQL function to prepare for improved error handling
The context of an error (e.g. the function in which it occured)
can be inferred by the database client. Not doing all in one
statement will render the context more meaningful.
author | Tom Gottfried <tom@intevation.de> |
---|---|
date | Fri, 01 Mar 2019 18:38:02 +0100 |
parents | 5f300bd7316f |
children | eb1d119f253f |
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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" "errors" "fmt" "log" "strings" "time" "gemma.intevation.de/gemma/pkg/models" "gemma.intevation.de/gemma/pkg/soap" "gemma.intevation.de/gemma/pkg/soap/erdms" ) type DistanceMarksVirtual struct { // URL is the URL of the SOAP service. URL string `json:"url"` // Username is the username used to authenticate. Username string `json:"username"` // Passwort is the password to authenticate. Password string `json:"password"` // Insecure indicates if HTTPS traffic // should validate certificates or not. Insecure bool `json:"insecure"` } const DMVJobKind JobKind = "dmv" type dmvJobCreator struct{} func init() { RegisterJobCreator(DMVJobKind, dmvJobCreator{}) } func (dmvJobCreator) Description() string { return "distance marks virtual" } func (dmvJobCreator) AutoAccept() bool { return true } func (dmvJobCreator) Create() Job { return new(DistanceMarksVirtual) } func (dmvJobCreator) Depends() []string { return []string{ "distance_marks_virtual", } } // StageDone does nothing as there is no staging for distance marks virtual. func (dmvJobCreator) StageDone(context.Context, *sql.Tx, int64) error { return nil } // CleanUp does nothing as there is nothing to cleanup with distance marks virtual. func (*DistanceMarksVirtual) CleanUp() error { return nil } const ( insertDistanceMarksVirtualSQL = ` INSERT INTO waterway.distance_marks_virtual ( location_code, geom, related_enc ) VALUES ( ($1::char(2), $2::char(3), $3::char(5), $4::char(5), $5::int), ST_SetSRID(ST_MakePoint($6, $7), 4326)::geography, $8 ) ON CONFLICT (location_code) DO UPDATE SET geom = ST_SetSRID(ST_MakePoint($6, $7), 4326)::geography, related_enc = $8 ` ) func (dmv *DistanceMarksVirtual) Do( ctx context.Context, importID int64, conn *sql.Conn, feedback Feedback, ) (interface{}, error) { start := time.Now() tx, err := conn.BeginTx(ctx, nil) if err != nil { return nil, err } defer tx.Rollback() var country string err = tx.QueryRowContext(ctx, selectCurrentUserCountrySQL).Scan(&country) switch { case err == sql.ErrNoRows: return nil, errors.New("Cannot figure out user country") case err != nil: return nil, err } country = strings.ToUpper(country) feedback.Info("Using country '%s'.", country) var auth *soap.BasicAuth if dmv.Username != "" { auth = &soap.BasicAuth{ Login: dmv.Username, Password: dmv.Password, } } client := erdms.NewRefService(dmv.URL, dmv.Insecure, auth) request := &erdms.GetRisDataXML{ GetRisDataXMLType: &erdms.GetRisDataXMLType{ Subcode: erdms.NoNS{Text: country + "%"}, Funcode: erdms.NoNS{Text: "DISMAR"}, }, } data, err := client.GetRisDataXML(request) if err != nil { log.Printf("error: %v\n", err) return nil, fmt.Errorf("Error requesting ERDMS service: %v", err) } insertStmt, err := tx.PrepareContext(ctx, insertDistanceMarksVirtualSQL) if err != nil { return nil, err } defer insertStmt.Close() var ignored, features int for _, dr := range data.RisdataReturn { if dr.RisidxCode == nil { ignored++ continue } code, err := models.IsrsFromString(string(*dr.RisidxCode)) if err != nil { feedback.Warn("invalid ISRS code %v", err) ignored++ continue } if dr.Lat == nil || dr.Lon == nil { feedback.Warn("missing lat/lon: %s", code) ignored++ continue } if dr.Relenc == nil { feedback.Warn("missing relenc: %s", code) ignored++ continue } if _, err := insertStmt.ExecContext( ctx, code.CountryCode, code.LoCode, code.FairwaySection, code.Orc, code.Hectometre, float64(*dr.Lon), float64(*dr.Lat), string(*dr.Relenc), ); err != nil { return nil, err } features++ } feedback.Info("ignored: %d", ignored) feedback.Info("features: %d", features) if features == 0 { return nil, errors.New("No features found") } if err = tx.Commit(); err == nil { feedback.Info("Refreshing distance marks (virtual) successfully took %s.", time.Since(start)) } else { feedback.Error("Refreshing distance marks (virtual) failed after %s.", time.Since(start)) } return nil, nil }