// WatchPredicate starts a watch for the items that m matches.
func (e *Etcd) WatchPredicate(ctx api.Context, m generic.Matcher, resourceVersion string) (watch.Interface, error) {
version, err := storage.ParseWatchResourceVersion(resourceVersion, e.EndpointName)
if err != nil {
return nil, err
}
filterFunc := func(obj runtime.Object) bool {
matches, err := m.Matches(obj)
if err != nil {
glog.Errorf("unable to match watch: %v", err)
return false
}
if matches && e.Decorator != nil {
if err := e.Decorator(obj); err != nil {
glog.Errorf("unable to decorate watch: %v", err)
return false
}
}
return matches
}
if name, ok := m.MatchesSingle(); ok {
key, err := e.KeyFunc(ctx, name)
if err != nil {
return nil, err
}
return e.Storage.Watch(key, version, filterFunc)
}
return e.Storage.WatchList(e.KeyRootFunc(ctx), version, filterFunc)
}
// ListPredicate returns a list of all the items matching m.
func (e *Etcd) ListPredicate(ctx api.Context, m generic.Matcher) (runtime.Object, error) {
list := e.NewListFunc()
trace := util.NewTrace("List " + reflect.TypeOf(list).String())
filterFunc := e.filterAndDecorateFunction(m)
defer trace.LogIfLong(600 * time.Millisecond)
if name, ok := m.MatchesSingle(); ok {
if key, err := e.KeyFunc(ctx, name); err == nil {
trace.Step("About to read single object")
err := e.Storage.GetToList(key, filterFunc, list)
trace.Step("Object extracted")
if err != nil {
return nil, err
}
return list, nil
}
// if we cannot extract a key based on the current context, the optimization is skipped
}
trace.Step("About to list directory")
err := e.Storage.List(e.KeyRootFunc(ctx), filterFunc, list)
trace.Step("List extracted")
if err != nil {
return nil, err
}
return list, nil
}
// ListPredicate returns a list of all the items matching m.
func (e *Etcd) ListPredicate(ctx api.Context, m generic.Matcher) (runtime.Object, error) {
list := e.NewListFunc()
trace := util.NewTrace("List " + reflect.TypeOf(list).String())
defer trace.LogIfLong(600 * time.Millisecond)
if name, ok := m.MatchesSingle(); ok {
trace.Step("About to read single object")
key, err := e.KeyFunc(ctx, name)
if err != nil {
return nil, err
}
err = e.Storage.GetToList(key, list)
trace.Step("Object extracted")
if err != nil {
return nil, err
}
} else {
trace.Step("About to list directory")
err := e.Storage.List(e.KeyRootFunc(ctx), list)
trace.Step("List extracted")
if err != nil {
return nil, err
}
}
defer trace.Step("List filtered")
return generic.FilterList(list, m, generic.DecoratorFunc(e.Decorator))
}
// ListPredicate returns a list of all the items matching m.
func (e *Etcd) ListPredicate(ctx api.Context, m generic.Matcher, options *api.ListOptions) (runtime.Object, error) {
list := e.NewListFunc()
trace := util.NewTrace("List " + reflect.TypeOf(list).String())
filterFunc := e.filterAndDecorateFunction(m)
defer trace.LogIfLong(600 * time.Millisecond)
if name, ok := m.MatchesSingle(); ok {
if key, err := e.KeyFunc(ctx, name); err == nil {
trace.Step("About to read single object")
err := e.Storage.GetToList(ctx, key, filterFunc, list)
trace.Step("Object extracted")
return list, etcderr.InterpretListError(err, e.EndpointName)
}
// if we cannot extract a key based on the current context, the optimization is skipped
}
trace.Step("About to list directory")
if options == nil {
options = &api.ListOptions{ResourceVersion: "0"}
}
version, err := storage.ParseWatchResourceVersion(options.ResourceVersion, e.EndpointName)
if err != nil {
return nil, err
}
err = e.Storage.List(ctx, e.KeyRootFunc(ctx), version, filterFunc, list)
trace.Step("List extracted")
return list, etcderr.InterpretListError(err, e.EndpointName)
}
// filterList filters any list object that conforms to the api conventions,
// provided that 'm' works with the concrete type of list. d is an optional
// decorator for the returned functions. Only matching items are decorated.
func filterList(list runtime.Object, m generic.Matcher, d decoratorFunc) (filtered runtime.Object, err error) {
// TODO: push a matcher down into tools.etcdHelper to avoid all this
// nonsense. This is a lot of unnecessary copies.
items, err := meta.ExtractList(list)
if err != nil {
return nil, err
}
var filteredItems []runtime.Object
for _, obj := range items {
match, err := m.Matches(obj)
if err != nil {
return nil, err
}
if match {
if d != nil {
if err := d(obj); err != nil {
return nil, err
}
}
filteredItems = append(filteredItems, obj)
}
}
err = meta.SetList(list, filteredItems)
if err != nil {
return nil, err
}
return list, nil
}
// WatchPredicate starts a watch for the items that m matches.
func (e *Store) WatchPredicate(ctx api.Context, m generic.Matcher, resourceVersion string) (watch.Interface, error) {
filterFunc := e.filterAndDecorateFunction(m)
if name, ok := m.MatchesSingle(); ok {
if key, err := e.KeyFunc(ctx, name); err == nil {
if err != nil {
return nil, err
}
return e.Storage.Watch(ctx, key, resourceVersion, filterFunc)
}
// if we cannot extract a key based on the current context, the optimization is skipped
}
return e.Storage.WatchList(ctx, e.KeyRootFunc(ctx), resourceVersion, filterFunc)
}
func (e *Store) filterAndDecorateFunction(m generic.Matcher) func(runtime.Object) bool {
return func(obj runtime.Object) bool {
matches, err := m.Matches(obj)
if err != nil {
glog.Errorf("unable to match watch: %v", err)
return false
}
if matches && e.Decorator != nil {
if err := e.Decorator(obj); err != nil {
glog.Errorf("unable to decorate watch: %v", err)
return false
}
}
return matches
}
}
// ListPredicate returns a list of all the items matching m.
func (e *Store) ListPredicate(ctx api.Context, m generic.Matcher, options *api.ListOptions) (runtime.Object, error) {
list := e.NewListFunc()
filterFunc := e.filterAndDecorateFunction(m)
if name, ok := m.MatchesSingle(); ok {
if key, err := e.KeyFunc(ctx, name); err == nil {
err := e.Storage.GetToList(ctx, key, filterFunc, list)
return list, storeerr.InterpretListError(err, e.QualifiedResource)
}
// if we cannot extract a key based on the current context, the optimization is skipped
}
if options == nil {
options = &api.ListOptions{ResourceVersion: "0"}
}
err := e.Storage.List(ctx, e.KeyRootFunc(ctx), options.ResourceVersion, filterFunc, list)
return list, storeerr.InterpretListError(err, e.QualifiedResource)
}
func (e *Store) createFilter(m generic.Matcher) storage.Filter {
filterFunc := func(obj runtime.Object) bool {
matches, err := m.Matches(obj)
if err != nil {
glog.Errorf("unable to match watch: %v", err)
return false
}
if matches && e.Decorator != nil {
if err := e.Decorator(obj); err != nil {
glog.Errorf("unable to decorate watch: %v", err)
return false
}
}
return matches
}
return storage.NewSimpleFilter(filterFunc, m.MatcherIndex)
}
// WatchPredicate starts a watch for the items that m matches.
func (e *Etcd) WatchPredicate(ctx api.Context, m generic.Matcher, resourceVersion string) (watch.Interface, error) {
version, err := storage.ParseWatchResourceVersion(resourceVersion, e.EndpointName)
if err != nil {
return nil, err
}
filterFunc := e.filterAndDecorateFunction(m)
if name, ok := m.MatchesSingle(); ok {
key, err := e.KeyFunc(ctx, name)
if err != nil {
return nil, err
}
return e.Storage.Watch(key, version, filterFunc)
}
return e.Storage.WatchList(e.KeyRootFunc(ctx), version, filterFunc)
}
// ListPredicate returns a list of all the items matching m.
func (e *Etcd) ListPredicate(ctx api.Context, m generic.Matcher, options *unversioned.ListOptions) (runtime.Object, error) {
list := e.NewListFunc()
filterFunc := e.filterAndDecorateFunction(m)
if name, ok := m.MatchesSingle(); ok {
if key, err := e.KeyFunc(ctx, name); err == nil {
err := e.Storage.GetToList(ctx, key, filterFunc, list)
return list, etcderr.InterpretListError(err, e.EndpointName)
}
// if we cannot extract a key based on the current context, the optimization is skipped
}
if options == nil {
options = &unversioned.ListOptions{ResourceVersion: "0"}
}
version, err := storage.ParseWatchResourceVersion(options.ResourceVersion, e.EndpointName)
if err != nil {
return nil, err
}
err = e.Storage.List(ctx, e.KeyRootFunc(ctx), version, filterFunc, list)
return list, etcderr.InterpretListError(err, e.EndpointName)
}
