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comparison pkg/wfs/global.go @ 5491:09346efa7f69 logging

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Do ogr2ogr check only once when it's needed the first time.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 20 Sep 2021 18:02:09 +0200
parents 5f47eeea988d
children 31973f6f5cca
comparison
equal deleted inserted replaced
5490:5f47eeea988d 5491:09346efa7f69
19 "io" 19 "io"
20 "io/ioutil" 20 "io/ioutil"
21 "os" 21 "os"
22 "os/exec" 22 "os/exec"
23 "path/filepath" 23 "path/filepath"
24 "sync"
24 25
25 "gemma.intevation.de/gemma/pkg/config" 26 "gemma.intevation.de/gemma/pkg/config"
26 "gemma.intevation.de/gemma/pkg/log" 27 "gemma.intevation.de/gemma/pkg/log"
27 ) 28 )
28 29
51 GeoJSONDownloader []string 52 GeoJSONDownloader []string
52 // GMLDownloader is a Downloader for GML. 53 // GMLDownloader is a Downloader for GML.
53 GMLDownloader []string 54 GMLDownloader []string
54 ) 55 )
55 56
56 // GetFeatures is the default Downloader in this Gemma server. 57 var (
57 var GetFeatures = setup() 58 getFeaturesOnce sync.Once
59 getFeatures func(*Capabilities, string, string) (Downloader, error)
60 )
58 61
59 func setup() func(*Capabilities, string, string) (Downloader, error) { 62 func getFeaturesOnceFunc() {
60 path, err := exec.LookPath("ogr2ogr") 63 path, err := exec.LookPath("ogr2ogr")
61 if err != nil { 64 if err != nil {
62 log.Infoln("ogr2ogr not installed. Using direct GeoJSON WFS download.") 65 log.Infoln("ogr2ogr not installed. Using direct GeoJSON WFS download.")
63 return getFeaturesGeoJSON 66 getFeatures = getFeaturesGeoJSON
67 } else {
68 log.Infof("ogr2ogr found at %s. Using GML WFS download.\n", path)
69 getFeatures = getFeaturesGML
64 } 70 }
65 log.Infof("ogr2ogr found at %s. Using GML WFS download.\n", path) 71 }
66 return getFeaturesGML 72
73 // GetFeatures is the default Downloader in this Gemma server.
74 func GetFeatures(
75 caps *Capabilities,
76 featureTypeName string,
77 sortBy string,
78 ) (Downloader, error) {
79 getFeaturesOnce.Do(getFeaturesOnceFunc)
80 return getFeatures(caps, featureTypeName, sortBy)
67 } 81 }
68 82
69 func getFeaturesGeoJSON( 83 func getFeaturesGeoJSON(
70 caps *Capabilities, 84 caps *Capabilities,
71 featureTypeName string, 85 featureTypeName string,