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filemonitorobserver.go
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/
filemonitorobserver.go
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package filemonitor
import (
"github.com/nzlov/go/array"
"os"
"path/filepath"
)
type FileMonitorObserver struct {
fileListeners *array.Array
fileMap map[string]*FileEntry
tempfileMap *array.Array
one bool
rootEntry *FileEntry
fileFileter *FileFilter
}
func NewFileMonitorObserver(path string) *FileMonitorObserver {
fileEntry, _ := NewFileEntry(path)
return NewFileMonitorObserverByFileEntry(fileEntry)
}
func NewFileMonitorObserverByFileFilter(path string, fileter *FileFilter) *FileMonitorObserver {
fileEntry, _ := NewFileEntry(path)
return NewFileMonitorObserverByFileEntryAndFileFileter(fileEntry, fileter)
}
func NewFileMonitorObserverByFileEntry(rootEntry *FileEntry) *FileMonitorObserver {
return NewFileMonitorObserverByFileEntryAndFileFileter(rootEntry, nil)
}
func NewFileMonitorObserverByFileEntryAndFileFileter(rootEntry *FileEntry, fileter *FileFilter) *FileMonitorObserver {
observer := &FileMonitorObserver{
fileListeners: array.NewArray(),
fileMap: make(map[string]*FileEntry),
tempfileMap: array.NewArray(),
one: true,
rootEntry: rootEntry,
fileFileter: fileter}
return observer
}
func (this *FileMonitorObserver) AddListener(listener FileMonitorListener) {
this.fileListeners.Add(listener)
}
func (this *FileMonitorObserver) DelListener(listener FileMonitorListener) {
this.fileListeners.RemoveValue(listener)
}
func (this *FileMonitorObserver) Check() {
for i := 0; i < this.fileListeners.Size(); i++ {
v, err := this.fileListeners.Get(i)
if err != nil {
continue
}
switch inst := v.(type) {
case FileMonitorListener:
inst.OnStart()
}
}
this.tempfileMap.Clear()
//判断是否有删除的文件或目录
for k, file := range this.fileMap {
if _, err := os.Stat(k); err != nil {
delete(this.fileMap, k)
for i := 0; i < this.fileListeners.Size(); i++ {
v, err := this.fileListeners.Get(i)
if err != nil {
continue
}
switch inst := v.(type) {
case FileMonitorListener:
if file.Directory() {
inst.DirectoryDelete(file)
} else {
inst.FileDelete(file)
}
}
}
}
}
filepath.Walk(this.rootEntry.Path(), func(path string, fi os.FileInfo, err error) error {
if nil == fi {
return err
}
// if fi.IsDir() {
// return nil
// }
// name := fi.Name()
if this.fileFileter != nil {
if !this.fileFileter.Check(path) && !fi.IsDir() {
return nil
}
}
//第一次监测时只添加
if this.one {
fileEntry, err := NewFileEntry(path)
if err != nil {
return nil
}
this.fileMap[path] = fileEntry
return nil
}
this.tempfileMap.Add(path)
//判断是否新建
file, ok := this.fileMap[path]
if !ok {
fileEntry, err := NewFileEntry(path)
if err != nil {
return nil
}
this.fileMap[path] = fileEntry
for i := 0; i < this.fileListeners.Size(); i++ {
v, err := this.fileListeners.Get(i)
if err != nil {
continue
}
switch inst := v.(type) {
case FileMonitorListener:
if fi.IsDir() {
inst.DirectoryCreate(fileEntry)
} else {
inst.FileCreate(fileEntry)
}
}
}
return nil
}
//如果不是新建就监测是否修改
if file.Refresh() {
for i := 0; i < this.fileListeners.Size(); i++ {
v, err := this.fileListeners.Get(i)
if err != nil {
continue
}
switch inst := v.(type) {
case FileMonitorListener:
if fi.IsDir() {
inst.DirectoryModify(file)
} else {
inst.FileModify(file)
}
}
}
return nil
}
return nil
})
if this.one {
this.one = false
} else {
}
for i := 0; i < this.fileListeners.Size(); i++ {
v, err := this.fileListeners.Get(i)
if err != nil {
continue
}
switch inst := v.(type) {
case FileMonitorListener:
inst.OnEnd()
}
}
}