Mercurial > gemma

annotate pkg/imports/dsr.go @ 4408:911b1349a9bd

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Added minimal error handling to deletion of SR.
author Sascha Wilde <wilde@intevation.de>
date Tue, 17 Sep 2019 12:52:29 +0200
parents 9c6c65a628a3
children ca6a5f722471
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rev   line source
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2019 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13 // * Sascha Wilde <wilde@intevation.de>
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14
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15 package imports
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16
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17 import (
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18 "context"
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19 "database/sql"
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20 "errors"
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21
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22 "gemma.intevation.de/gemma/pkg/models"
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23 )
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24
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25 // DeleteSoundingResult is a Job to delete a sounding result from the database.
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26 type DeleteSoundingResult struct {
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27 BottleneckId string `json:"bottleneck-id"`
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28 Date models.Date `json:"date-info"`
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29 }
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30
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31 // DSRJobKind is the import queue type identifier.
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32 const DSRJobKind JobKind = "dsr"
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33
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34 type dsrJobCreator struct{}
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35
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36 func init() { RegisterJobCreator(DSRJobKind, dsrJobCreator{}) }
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37
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38 func (dsrJobCreator) Description() string { return "delete sounding result" }
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39
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40 func (dsrJobCreator) AutoAccept() bool { return false }
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41
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42 func (dsrJobCreator) Create() Job { return new(DeleteSoundingResult) }
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43
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44 func (dsrJobCreator) Depends() [2][]string {
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45 // Same as import.
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46 return srJobCreator{}.Depends()
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47 }
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48
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49 const (
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50 dsrFindSQL = `
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51 SELECT id FROM waterway.sounding_results
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52 WHERE bottleneck_id = $1
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53 AND date_info = $2
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54 AND staging_done
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55 `
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56 dsrStageDoneSQL = `
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57 DELETE FROM waterway.sounding_results
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58 WHERE id IN (
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59 SELECT key from import.track_imports
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60 WHERE import_id = $1 AND
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61 deletion AND
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62 relation = 'waterway.sounding_results'::regclass)`
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63 )
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64
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65 // StageDone finally removes the sounding result from the database.
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66 func (dsrJobCreator) StageDone(
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67 ctx context.Context,
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68 tx *sql.Tx,
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69 id int64,
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70 ) error {
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71 result, err := tx.ExecContext(ctx, dsrStageDoneSQL, id)
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72 if err != nil {
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73 return err
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74 }
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75 rows, err := result.RowsAffected()
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76 if err != nil {
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77 return err
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78 }
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79 if rows == 0 {
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80 return errors.New("Deletion failed. " +
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81 "Propably Data outside the area of responsibility." +
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82 "Or the data was already deleted by another user.")
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83 }
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84 return err
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85 }
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86
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87 // CleanUp of a sounding result delete import is a NOP.
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88 func (*DeleteSoundingResult) CleanUp() error { return nil }
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89
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90 // Do prepares the deletion of the sounding result.
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91 func (dsr *DeleteSoundingResult) Do(
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92 ctx context.Context,
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93 importID int64,
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94 conn *sql.Conn,
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95 feedback Feedback,
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96 ) (interface{}, error) {
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97
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98 tx, err := conn.BeginTx(ctx, nil)
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99 if err != nil {
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100 return nil, err
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101 }
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102 defer tx.Rollback()
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103
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104 feedback.Info("SR: bottleneck-id: %v, date-info: %v",
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105 dsr.BottleneckId, dsr.Date.Time)
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106
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107 var id int64
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108 if err := tx.QueryRowContext(ctx, dsrFindSQL,
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109 dsr.BottleneckId, dsr.Date.Time).Scan(&id); err != nil {
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110 return nil, err
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111 }
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112
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113 feedback.Info("Prepare deletion of sounding result with id %d", id)
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114
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115 if _, err := tx.ExecContext(
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116 ctx,
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117 trackImportDeletionSQL,
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118 importID,
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119 "waterway.sounding_results",
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120 id,
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121 true,
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122 ); err != nil {
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123 return nil, err
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124 }
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125
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126 if err := tx.Commit(); err != nil {
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127 return nil, err
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128 }
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129
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130 return dsr, nil
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131 }