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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| package refreshable_file | ||
|
|
||
| import ( | ||
| "github.com/alibaba/sentinel-golang/ext/datasource" | ||
| "github.com/alibaba/sentinel-golang/logging" | ||
| "github.com/alibaba/sentinel-golang/util" | ||
| "github.com/fsnotify/fsnotify" | ||
| "github.com/pkg/errors" | ||
| "io/ioutil" | ||
| "os" | ||
| "time" | ||
| ) | ||
|
|
||
| var ( | ||
| logger = logging.GetDefaultLogger() | ||
| ) | ||
|
|
||
| type RefreshableFileDataSource struct { | ||
| sourceFilePath string | ||
| handlers []datasource.PropertyHandler | ||
| } | ||
|
|
||
| func FileDataSourceStarter(sourceFilePath string, handlers ...datasource.PropertyHandler) (*RefreshableFileDataSource, error) { | ||
| ds := &RefreshableFileDataSource{ | ||
| sourceFilePath: sourceFilePath, | ||
| handlers: handlers, | ||
| } | ||
| return ds, ds.Initialize() | ||
| } | ||
|
|
||
| // return idx if existed, else return -1 | ||
| func (s *RefreshableFileDataSource) indexOfHandler(h datasource.PropertyHandler) int { | ||
| for idx, handler := range s.handlers { | ||
| if handler == h { | ||
| return idx | ||
| } | ||
| } | ||
| return -1 | ||
| } | ||
|
|
||
| func (s *RefreshableFileDataSource) AddPropertyHandler(h datasource.PropertyHandler) { | ||
| if s.indexOfHandler(h) < 0 { | ||
| return | ||
| } | ||
| s.handlers = append(s.handlers, h) | ||
| } | ||
|
|
||
| func (s *RefreshableFileDataSource) RemovePropertyHandler(h datasource.PropertyHandler) { | ||
| idx := s.indexOfHandler(h) | ||
| if idx < 0 { | ||
| return | ||
| } | ||
| s.handlers = append(s.handlers[:idx], s.handlers[idx+1:]...) | ||
| } | ||
|
|
||
| func (s *RefreshableFileDataSource) ReadSource() ([]byte, error) { | ||
| f, err := os.Open(s.sourceFilePath) | ||
| defer f.Close() | ||
|
|
||
| if err != nil { | ||
| return nil, errors.Errorf("The rules file is not existed, err:%+v.", errors.WithStack(err)) | ||
| } | ||
| src, err := ioutil.ReadAll(f) | ||
| if err != nil { | ||
| return nil, errors.Errorf("Fail to read file, err: %+v.", errors.WithStack(err)) | ||
| } | ||
| return src, nil | ||
| } | ||
|
|
||
| func (s *RefreshableFileDataSource) Initialize() error { | ||
| s.doUpdate() | ||
|
|
||
| watcher, err := fsnotify.NewWatcher() | ||
| if err != nil { | ||
| return errors.Errorf("Fail to new a watcher of fsnotify, err:%+v", err) | ||
| } | ||
| err = watcher.Add(s.sourceFilePath) | ||
| if err != nil { | ||
| return errors.Errorf("Fail add a watcher on file(%s), err:%+v", s.sourceFilePath, err) | ||
| } | ||
|
|
||
| go util.RunWithRecover(func() { | ||
| defer watcher.Close() | ||
| for { | ||
| select { | ||
| case ev := <-watcher.Events: | ||
| if ev.Op&fsnotify.Write == fsnotify.Write { | ||
| s.doUpdate() | ||
| } | ||
|
|
||
| if ev.Op&fsnotify.Remove == fsnotify.Remove || ev.Op&fsnotify.Rename == fsnotify.Rename { | ||
| logger.Errorf("The file source(%s) was removed or renamed.", s.sourceFilePath) | ||
| for _, h := range s.handlers { | ||
| err := h.Handle(nil) | ||
| if err != nil { | ||
| logger.Errorf("RefreshableFileDataSource fail to publish rules, handle:%+v; err=%+v.", h, err) | ||
| } | ||
| } | ||
| } | ||
| case err := <-watcher.Errors: | ||
| logger.Errorf("Watch err on file(%s), err:", s.sourceFilePath, err) | ||
| time.Sleep(time.Second * 3) | ||
| } | ||
| } | ||
| }, logger) | ||
| return nil | ||
| } | ||
|
|
||
| func (s *RefreshableFileDataSource) doUpdate() { | ||
| src, err := s.ReadSource() | ||
| if err != nil { | ||
| logger.Errorf("%+v", err) | ||
| return | ||
| } | ||
| for _, h := range s.handlers { | ||
| err := h.Handle(src) | ||
| if err != nil { | ||
| logger.Errorf("RefreshableFileDataSource fail to publish rules, handle:%+v; err=%+v.", h, err) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (s *RefreshableFileDataSource) Close() error { | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| package refreshable_file | ||
|
|
||
| import ( | ||
| "github.com/alibaba/sentinel-golang/ext/datasource" | ||
| "testing" | ||
| "time" | ||
| ) | ||
|
|
||
| func TestNewFileDataSource_FlowRule(t *testing.T) { | ||
| ds, _ := FileDataSourceStarter("../../../tests/testdata/extension/refreshable_file/FlowRule.json", datasource.NewFlowRulesHandler(datasource.FlowRulesJsonConverter)) | ||
| time.Sleep(5 * time.Second) | ||
| ds.Close() | ||
| } | ||
|
|
||
| func TestNewFileDataSource_SystemRule(t *testing.T) { | ||
| ds, _ := FileDataSourceStarter("../../../tests/testdata/extension/refreshable_file/SystemRule.json", datasource.NewSystemRulesHandler(datasource.SystemRulesJsonConverter)) | ||
| time.Sleep(5 * time.Second) | ||
| ds.Close() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| [ | ||
| { | ||
| "id": 0, | ||
| "resource": "abc0", | ||
| "limitApp": "default", | ||
| "grade": 1, | ||
| "strategy": 0, | ||
| "controlBehavior": 0, | ||
| "refResource": "refDefault", | ||
| "warmUpPeriodSec": 10, | ||
| "maxQueueingTimeMs": 1000, | ||
| "clusterMode": false, | ||
| "clusterConfig": { | ||
| "thresholdType": 0 | ||
| } | ||
| }, | ||
| { | ||
| "id": 1, | ||
| "resource": "abc1", | ||
| "limitApp": "default", | ||
| "grade": 1, | ||
| "strategy": 0, | ||
| "controlBehavior": 0, | ||
| "refResource": "refDefault", | ||
| "warmUpPeriodSec": 10, | ||
| "maxQueueingTimeMs": 1000, | ||
| "clusterMode": false, | ||
| "clusterConfig": { | ||
| "thresholdType": 0 | ||
| } | ||
| }, | ||
| { | ||
| "id": 2, | ||
| "resource": "abc2", | ||
| "limitApp": "default", | ||
| "grade": 1, | ||
| "strategy": 0, | ||
| "controlBehavior": 0, | ||
| "refResource": "refDefault", | ||
| "warmUpPeriodSec": 10, | ||
| "maxQueueingTimeMs": 1000, | ||
| "clusterMode": false, | ||
| "clusterConfig": { | ||
| "thresholdType": 0 | ||
| } | ||
| } | ||
| ] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| [ | ||
| { | ||
| "id": 0, | ||
| "metricType": 0, | ||
| "adaptiveStrategy": 0 | ||
| }, | ||
| { | ||
| "id": 1, | ||
| "metricType": 0, | ||
| "adaptiveStrategy": 0 | ||
| }, | ||
| { | ||
| "id": 2, | ||
| "metricType": 0, | ||
| "adaptiveStrategy": 0 | ||
| } | ||
| ] |