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log_entry.go
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log_entry.go
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/*******************************************************************************
* Copyright 2019 Dell Inc.
*
* 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 models
import (
"encoding/json"
"fmt"
"github.com/edgexfoundry/go-mod-core-contracts/v2/errors"
)
// These constants identify the log levels in order of increasing severity.
const (
TraceLog = "TRACE"
DebugLog = "DEBUG"
InfoLog = "INFO"
WarnLog = "WARN"
ErrorLog = "ERROR"
)
type LogEntry struct {
Level string `bson:"logLevel,omitempty" json:"logLevel"`
Args []interface{} `bson:"args,omitempty" json:"args"`
OriginService string `bson:"originService,omitempty" json:"originService"`
Message string `bson:"message,omitempty" json:"message"`
Created int64 `bson:"created,omitempty" json:"created"`
isValidated bool // internal member used for validation check
}
// UnmarshalJSON implements the Unmarshaler interface for the LogEntry type
func (le *LogEntry) UnmarshalJSON(data []byte) error {
var err error
type Alias struct {
Level *string `json:"logLevel,omitempty"`
Args []interface{} `json:"args,omitempty"`
OriginService *string `json:"originService,omitempty"`
Message *string `json:"message,omitempty"`
Created int64 `json:"created,omitempty"`
}
a := Alias{}
// Error with unmarshaling
if err = json.Unmarshal(data, &a); err != nil {
return err
}
// Nillable fields
if a.Level != nil {
le.Level = *a.Level
}
if a.OriginService != nil {
le.OriginService = *a.OriginService
}
if a.Message != nil {
le.Message = *a.Message
}
le.Args = a.Args
le.Created = a.Created
le.isValidated, err = le.Validate()
return err
}
// Validate satisfies the Validator interface
func (le LogEntry) Validate() (bool, errors.EdgeX) {
if !le.isValidated {
logLevels := []string{TraceLog, DebugLog, InfoLog, WarnLog, ErrorLog}
for _, name := range logLevels {
if name == le.Level {
return true, nil
}
}
return false, errors.NewCommonEdgeX(errors.KindContractInvalid, fmt.Sprintf("Invalid level in LogEntry: %s", le.Level), nil)
}
return le.isValidated, nil
}