87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
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/*******************************************************************************
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* Copyright 2019 Dell Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*******************************************************************************/
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package logger
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import (
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"encoding/json"
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"fmt"
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)
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// These constants identify the log levels in order of increasing severity.
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const (
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TraceLog = "TRACE"
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DebugLog = "DEBUG"
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InfoLog = "INFO"
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WarnLog = "WARN"
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ErrorLog = "ERROR"
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)
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type LogEntry struct {
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Level string `bson:"logLevel,omitempty" json:"logLevel"`
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Args []interface{} `bson:"args,omitempty" json:"args"`
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OriginService string `bson:"originService,omitempty" json:"originService"`
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Message string `bson:"message,omitempty" json:"message"`
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Created int64 `bson:"created,omitempty" json:"created"`
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isValidated bool // internal member used for validation check
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}
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// UnmarshalJSON implements the Unmarshaler interface for the LogEntry type
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func (le *LogEntry) UnmarshalJSON(data []byte) error {
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var err error
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type Alias struct {
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Level *string `json:"logLevel,omitempty"`
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Args []interface{} `json:"args,omitempty"`
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OriginService *string `json:"originService,omitempty"`
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Message *string `json:"message,omitempty"`
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Created int64 `json:"created,omitempty"`
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}
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a := Alias{}
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// Error with unmarshaling
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if err = json.Unmarshal(data, &a); err != nil {
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return err
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}
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// Nillable fields
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if a.Level != nil {
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le.Level = *a.Level
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}
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if a.OriginService != nil {
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le.OriginService = *a.OriginService
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}
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if a.Message != nil {
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le.Message = *a.Message
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}
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le.Args = a.Args
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le.Created = a.Created
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le.isValidated, err = le.Validate()
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return err
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}
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// Validate satisfies the Validator interface
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func (le LogEntry) Validate() (bool, error) {
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if !le.isValidated {
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logLevels := []string{TraceLog, DebugLog, InfoLog, WarnLog, ErrorLog}
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for _, name := range logLevels {
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if name == le.Level {
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return true, nil
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}
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}
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return false, fmt.Errorf("Invalid level in LogEntry: %s", le.Level)
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}
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return le.isValidated, nil
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}
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