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Create a pattern for error

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This commit is contained in:
Eder Manoel Cale Costa 2019-09-15 23:12:06 -03:00
parent aa3e7c1189
commit fad10f3104
3 changed files with 15 additions and 7 deletions
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2
.gitignore vendored
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@ -26,3 +26,5 @@ _testmain.go
# #
.DS_Store .DS_Store
TODO TODO
.idea/

2
example/fishing.go
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@ -4,7 +4,7 @@ import (
"encoding/json" "encoding/json"
"fmt" "fmt"
scribble "github.com/nanobox-io/golang-scribble" scribble "github.com/edermanoel94/golang-scribble"
) )
// a fish // a fish

18
scribble.go
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@ -3,6 +3,7 @@ package scribble
import ( import (
"encoding/json" "encoding/json"
"errors"
"fmt" "fmt"
"io/ioutil" "io/ioutil"
"os" "os"
@ -15,6 +16,11 @@ import (
// Version is the current version of the project // Version is the current version of the project
const Version = "1.0.4" const Version = "1.0.4"
var (
ErrMissingResource = errors.New("missing resource - unable to save record, no name")
ErrMissingCollection = errors.New("missing collection - no place to save record")
)
type ( type (
// Logger is a generic logger interface // Logger is a generic logger interface
@ -86,12 +92,12 @@ func (d *Driver) Write(collection, resource string, v interface{}) error {
// ensure there is a place to save record // ensure there is a place to save record
if collection == "" { if collection == "" {
return fmt.Errorf("Missing collection - no place to save record!") return ErrMissingCollection
} }
// ensure there is a resource (name) to save record as // ensure there is a resource (name) to save record as
if resource == "" { if resource == "" {
return fmt.Errorf("Missing resource - unable to save record (no name)!") return ErrMissingResource
} }
mutex := d.getOrCreateMutex(collection) mutex := d.getOrCreateMutex(collection)
@ -128,12 +134,12 @@ func (d *Driver) Read(collection, resource string, v interface{}) error {
// ensure there is a place to save record // ensure there is a place to save record
if collection == "" { if collection == "" {
return fmt.Errorf("Missing collection - no place to save record!") return ErrMissingCollection
} }
// ensure there is a resource (name) to save record as // ensure there is a resource (name) to save record as
if resource == "" { if resource == "" {
return fmt.Errorf("Missing resource - unable to save record (no name)!") return ErrMissingResource
} }
// //
@ -160,7 +166,7 @@ func (d *Driver) ReadAll(collection string) ([]string, error) {
// ensure there is a collection to read // ensure there is a collection to read
if collection == "" { if collection == "" {
return nil, fmt.Errorf("Missing collection - unable to record location!") return nil, ErrMissingCollection
} }
// //
@ -236,7 +242,7 @@ func stat(path string) (fi os.FileInfo, err error) {
} }
// getOrCreateMutex creates a new collection specific mutex any time a collection // getOrCreateMutex creates a new collection specific mutex any time a collection
// is being modfied to avoid unsafe operations // is being modified to avoid unsafe operations
func (d *Driver) getOrCreateMutex(collection string) *sync.Mutex { func (d *Driver) getOrCreateMutex(collection string) *sync.Mutex {
d.mutex.Lock() d.mutex.Lock()