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chore: use custom dbmanager if not set (#5843)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,192 @@ | ||
| /* | ||
| Copyright 2021 The Dapr Authors | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package config | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "reflect" | ||
| "strconv" | ||
| "time" | ||
|
|
||
| "github.com/mitchellh/mapstructure" | ||
| ) | ||
|
|
||
| var ( | ||
| typeDuration = reflect.TypeOf(time.Duration(5)) //nolint: gochecknoglobals | ||
| typeTime = reflect.TypeOf(time.Time{}) //nolint: gochecknoglobals | ||
| typeStringDecoder = reflect.TypeOf((*StringDecoder)(nil)).Elem() //nolint: gochecknoglobals | ||
| ) | ||
|
|
||
| // StringDecoder is used as a way for custom types (or alias types) to | ||
| // override the basic decoding function in the `decodeString` | ||
| // DecodeHook. `encoding.TextMashaller` was not used because it | ||
| // matches many Go types and would have potentially unexpected results. | ||
| // Specifying a custom decoding func should be very intentional. | ||
| type StringDecoder interface { | ||
| DecodeString(value string) error | ||
| } | ||
|
|
||
| // Decode decodes generic map values from `input` to `output`, while providing helpful error information. | ||
| // `output` must be a pointer to a Go struct that contains `mapstructure` struct tags on fields that should | ||
| // be decoded. This function is useful when decoding values from configuration files parsed as | ||
| // `map[string]interface{}` or component metadata as `map[string]string`. | ||
| // | ||
| // Most of the heavy lifting is handled by the mapstructure library. A custom decoder is used to handle | ||
| // decoding string values to the supported primitives. | ||
| func Decode(input interface{}, output interface{}) error { | ||
| decoder, err := mapstructure.NewDecoder( | ||
| &mapstructure.DecoderConfig{ //nolint: exhaustruct | ||
| Result: output, | ||
| DecodeHook: decodeString, | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return decoder.Decode(input) | ||
| } | ||
|
|
||
| //nolint:cyclop | ||
| func decodeString(f reflect.Type, t reflect.Type, data any) (any, error) { | ||
| if t.Kind() == reflect.String && f.Kind() != reflect.String { | ||
| return fmt.Sprintf("%v", data), nil | ||
| } | ||
| if f.Kind() == reflect.Ptr { | ||
| f = f.Elem() | ||
| data = reflect.ValueOf(data).Elem().Interface() | ||
| } | ||
| if f.Kind() != reflect.String { | ||
| return data, nil | ||
| } | ||
|
|
||
| dataString, ok := data.(string) | ||
| if !ok { | ||
| return nil, fmt.Errorf("expected string: got %T", data) | ||
| } | ||
|
|
||
| var result any | ||
| var decoder StringDecoder | ||
|
|
||
| if t.Implements(typeStringDecoder) { | ||
| result = reflect.New(t.Elem()).Interface() | ||
| decoder = result.(StringDecoder) | ||
| } else if reflect.PtrTo(t).Implements(typeStringDecoder) { | ||
| result = reflect.New(t).Interface() | ||
| decoder = result.(StringDecoder) | ||
| } | ||
|
|
||
| if decoder != nil { | ||
| if err := decoder.DecodeString(dataString); err != nil { | ||
| if t.Kind() == reflect.Ptr { | ||
| t = t.Elem() | ||
| } | ||
|
|
||
| return nil, fmt.Errorf("invalid %s %q: %v", t.Name(), dataString, err) | ||
| } | ||
|
|
||
| return result, nil | ||
| } | ||
|
|
||
| switch t { | ||
| case typeDuration: | ||
| // Check for simple integer values and treat them | ||
| // as milliseconds | ||
| if val, err := strconv.Atoi(dataString); err == nil { | ||
| return time.Duration(val) * time.Millisecond, nil | ||
| } | ||
|
|
||
| // Convert it by parsing | ||
| d, err := time.ParseDuration(dataString) | ||
|
|
||
| return d, invalidError(err, "duration", dataString) | ||
| case typeTime: | ||
| // Convert it by parsing | ||
| t, err := time.Parse(time.RFC3339Nano, dataString) | ||
| if err == nil { | ||
| return t, nil | ||
| } | ||
| t, err = time.Parse(time.RFC3339, dataString) | ||
|
|
||
| return t, invalidError(err, "time", dataString) | ||
| } | ||
|
|
||
| switch t.Kind() { | ||
| case reflect.Uint: | ||
| val, err := strconv.ParseUint(dataString, 10, 64) | ||
|
|
||
| return uint(val), invalidError(err, "uint", dataString) | ||
| case reflect.Uint64: | ||
| val, err := strconv.ParseUint(dataString, 10, 64) | ||
|
|
||
| return val, invalidError(err, "uint64", dataString) | ||
| case reflect.Uint32: | ||
| val, err := strconv.ParseUint(dataString, 10, 32) | ||
|
|
||
| return uint32(val), invalidError(err, "uint32", dataString) | ||
| case reflect.Uint16: | ||
| val, err := strconv.ParseUint(dataString, 10, 16) | ||
|
|
||
| return uint16(val), invalidError(err, "uint16", dataString) | ||
| case reflect.Uint8: | ||
| val, err := strconv.ParseUint(dataString, 10, 8) | ||
|
|
||
| return uint8(val), invalidError(err, "uint8", dataString) | ||
|
|
||
| case reflect.Int: | ||
| val, err := strconv.ParseInt(dataString, 10, 64) | ||
|
|
||
| return int(val), invalidError(err, "int", dataString) | ||
| case reflect.Int64: | ||
| val, err := strconv.ParseInt(dataString, 10, 64) | ||
|
|
||
| return val, invalidError(err, "int64", dataString) | ||
| case reflect.Int32: | ||
| val, err := strconv.ParseInt(dataString, 10, 32) | ||
|
|
||
| return int32(val), invalidError(err, "int32", dataString) | ||
| case reflect.Int16: | ||
| val, err := strconv.ParseInt(dataString, 10, 16) | ||
|
|
||
| return int16(val), invalidError(err, "int16", dataString) | ||
| case reflect.Int8: | ||
| val, err := strconv.ParseInt(dataString, 10, 8) | ||
|
|
||
| return int8(val), invalidError(err, "int8", dataString) | ||
|
|
||
| case reflect.Float32: | ||
| val, err := strconv.ParseFloat(dataString, 32) | ||
|
|
||
| return float32(val), invalidError(err, "float32", dataString) | ||
| case reflect.Float64: | ||
| val, err := strconv.ParseFloat(dataString, 64) | ||
|
|
||
| return val, invalidError(err, "float64", dataString) | ||
|
|
||
| case reflect.Bool: | ||
| val, err := strconv.ParseBool(dataString) | ||
|
|
||
| return val, invalidError(err, "bool", dataString) | ||
|
|
||
| default: | ||
| return data, nil | ||
| } | ||
| } | ||
|
|
||
| func invalidError(err error, msg, value string) error { | ||
| if err == nil { | ||
| return nil | ||
| } | ||
|
|
||
| return fmt.Errorf("invalid %s %q", msg, value) | ||
| } |
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