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utils.go
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/
utils.go
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// Package utils [general utility functions for the db1000n app]
package utils
import (
"log"
"os"
"strconv"
"time"
"github.com/mitchellh/mapstructure"
)
// PanicHandler just stub it in the beginning of every major module invocation to prevent single module failure from crashing the whole app
func PanicHandler() {
if err := recover(); err != nil {
log.Printf("caught panic: %v", err)
}
}
// GetEnvStringDefault returns environment variable or default value if no env varible is present
func GetEnvStringDefault(key, defaultValue string) string {
value, ok := os.LookupEnv(key)
if !ok {
return defaultValue
}
return value
}
// GetEnvIntDefault returns environment variable or default value if no env varible is present
func GetEnvIntDefault(key string, defaultValue int) int {
value, ok := os.LookupEnv(key)
if !ok {
return defaultValue
}
v, err := strconv.Atoi(value)
if err != nil {
log.Printf("GetEnvIntDefault[%s]: %v", key, err)
return defaultValue
}
return v
}
// GetEnvBoolDefault returns environment variable or default value if no env varible is present
func GetEnvBoolDefault(key string, defaultValue bool) bool {
value, ok := os.LookupEnv(key)
if !ok {
return defaultValue
}
v, err := strconv.ParseBool(value)
if err != nil {
log.Printf("GetEnvBoolDefault[%s]: %v", key, err)
return defaultValue
}
return v
}
// GetEnvDurationDefault returns environment variable or default value if no env varible is present
func GetEnvDurationDefault(key string, defaultValue time.Duration) time.Duration {
value, ok := os.LookupEnv(key)
if !ok {
return defaultValue
}
v, err := time.ParseDuration(value)
if err != nil {
log.Printf("GetEnvBoolDefault[%s]: %v", key, err)
return defaultValue
}
return v
}
// Decode is an alias to a mapstructure.NewDecoder({Squash: true}).Decode()
func Decode(input interface{}, output interface{}) error {
decoder, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{Squash: true, Result: output})
if err != nil {
log.Printf("Error parsing job config: %v", err)
return err
}
return decoder.Decode(input)
}