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Add configurable error level handling and custom loggers #20

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merged 8 commits into from
May 28, 2021
Merged

Add configurable error level handling and custom loggers #20

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48e99f0
Add configurable error level handling and custom loggers
tbonfort May 3, 2021
e39e258
wip
tbonfort May 5, 2021
4a5f1eb
scaffolding
tbonfort May 28, 2021
a0f4ab0
wip
tbonfort May 28, 2021
dfc3597
wip
tbonfort May 28, 2021
5c09e7d
conversion done
tbonfort May 28, 2021
5d4aff5
cover custom error handlers
tbonfort May 28, 2021
7df8baf
fix
tbonfort May 28, 2021
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@tbonfort
tbonfort committed May 28, 2021
commit a0f4ab04b7582b556cd8d5254f962876ba17f490
22 changes: 19 additions & 3 deletions doc_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -517,22 +517,38 @@ func Example_vectorTutorial() {
// created geometry { "type": "Point", "coordinates": [ 1.0, 1.0 ] }
}

//ExampleErrorHandler_sentinel is an example to make godal.Open return a specific golang
//error when the gdal emitted error/log matches certain criteria
func ExampleErrorHandler_sentinel() {
sentinel := errors.New("noent")
eh := func(ec godal.ErrorCategory, code int, msg string) error {
/* do some advanced checking of ec, code and msg to determine if this is an actual error */
not_an_error := false
if not_an_error {
haveError := true
if !haveError {
log.Println(msg)
return nil
}
return sentinel

}
_, err := godal.Open("nonexistent.tif", godal.ErrLogger(eh))
if err == sentinel {
fmt.Println(err.Error())
}

// Output:
// noent
}

//ExampleErrorHandler_warnings is an example to set up an error handler that ignores gdal warnings
func ExampleErrorHandler_warnings() {
eh := func(ec godal.ErrorCategory, code int, msg string) error {
if ec <= godal.CE_Warning {
log.Println(msg)
return nil
}
return fmt.Errorf("GDAL %d: %s", code, msg)
}
_, err := godal.Open("nonexistent.tif", godal.ErrLogger(eh))
// err if returned will not arise from a gdal warning
_ = err
}
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