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Probe revamped to provide for a new WrappedError struct to wrap probes as error interface

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This convenience was necessary to be used for golang library functions like io.Copy and io.Pipe
where we shouldn't be writing proxies and alternatives returning *probe.Error

This change also brings more changes across code base for clear separation regarding where an error
interface should be passed encapsulating *probe.Error and where it should be used as is.
This commit is contained in:
Harshavardhana
2015-08-07 23:47:22 -07:00
parent 28d9565400
commit 45b59b8456
34 changed files with 392 additions and 363 deletions
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32
pkg/donut/disk/disk.go
View File

@@ -39,20 +39,20 @@ type Disk struct {
// New - instantiate new disk
func New(diskPath string) (Disk, *probe.Error) {
if diskPath == "" {
return Disk{}, probe.New(InvalidArgument{})
return Disk{}, probe.NewError(InvalidArgument{})
}
st, err := os.Stat(diskPath)
if err != nil {
return Disk{}, probe.New(err)
return Disk{}, probe.NewError(err)
}
if !st.IsDir() {
return Disk{}, probe.New(syscall.ENOTDIR)
return Disk{}, probe.NewError(syscall.ENOTDIR)
}
s := syscall.Statfs_t{}
err = syscall.Statfs(diskPath, &s)
if err != nil {
return Disk{}, probe.New(err)
return Disk{}, probe.NewError(err)
}
disk := Disk{
lock: &sync.Mutex{},
@@ -64,7 +64,7 @@ func New(diskPath string) (Disk, *probe.Error) {
disk.fsInfo["MountPoint"] = disk.path
return disk, nil
}
return Disk{}, probe.New(UnsupportedFilesystem{Type: strconv.FormatInt(int64(s.Type), 10)})
return Disk{}, probe.NewError(UnsupportedFilesystem{Type: strconv.FormatInt(int64(s.Type), 10)})
}
// IsUsable - is disk usable, alive
@@ -103,7 +103,7 @@ func (disk Disk) MakeDir(dirname string) *probe.Error {
disk.lock.Lock()
defer disk.lock.Unlock()
if err := os.MkdirAll(filepath.Join(disk.path, dirname), 0700); err != nil {
return probe.New(err)
return probe.NewError(err)
}
return nil
}
@@ -115,12 +115,12 @@ func (disk Disk) ListDir(dirname string) ([]os.FileInfo, *probe.Error) {
dir, err := os.Open(filepath.Join(disk.path, dirname))
if err != nil {
return nil, probe.New(err)
return nil, probe.NewError(err)
}
defer dir.Close()
contents, err := dir.Readdir(-1)
if err != nil {
return nil, probe.New(err)
return nil, probe.NewError(err)
}
var directories []os.FileInfo
for _, content := range contents {
@@ -139,12 +139,12 @@ func (disk Disk) ListFiles(dirname string) ([]os.FileInfo, *probe.Error) {
dir, err := os.Open(filepath.Join(disk.path, dirname))
if err != nil {
return nil, probe.New(err)
return nil, probe.NewError(err)
}
defer dir.Close()
contents, err := dir.Readdir(-1)
if err != nil {
return nil, probe.New(err)
return nil, probe.NewError(err)
}
var files []os.FileInfo
for _, content := range contents {
@@ -162,12 +162,12 @@ func (disk Disk) CreateFile(filename string) (*atomic.File, *probe.Error) {
defer disk.lock.Unlock()
if filename == "" {
return nil, probe.New(InvalidArgument{})
return nil, probe.NewError(InvalidArgument{})
}
f, err := atomic.FileCreate(filepath.Join(disk.path, filename))
if err != nil {
return nil, probe.New(err)
return nil, probe.NewError(err)
}
return f, nil
@@ -179,11 +179,11 @@ func (disk Disk) Open(filename string) (*os.File, *probe.Error) {
defer disk.lock.Unlock()
if filename == "" {
return nil, probe.New(InvalidArgument{})
return nil, probe.NewError(InvalidArgument{})
}
dataFile, err := os.Open(filepath.Join(disk.path, filename))
if err != nil {
return nil, probe.New(err)
return nil, probe.NewError(err)
}
return dataFile, nil
}
@@ -194,11 +194,11 @@ func (disk Disk) OpenFile(filename string, flags int, perm os.FileMode) (*os.Fil
defer disk.lock.Unlock()
if filename == "" {
return nil, probe.New(InvalidArgument{})
return nil, probe.NewError(InvalidArgument{})
}
dataFile, err := os.OpenFile(filepath.Join(disk.path, filename), flags, perm)
if err != nil {
return nil, probe.New(err)
return nil, probe.NewError(err)
}
return dataFile, nil
}