mirror of
https://github.com/kubernetes/client-go.git
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ff8083eb1d
Passing a context to StartWithContext enables context-aware reflector logging. This is the main remaining source of log spam (output to stderr instead of per-test logger) in controller unit tests. WaitForCacheSynceWithContext takes advantage of the new cache.WaitFor + NamedHasSynced functionality to finish "immediately" (= no virtual time passed) in a synctest bubble. While at it, the return type gets improved so that a failure is easier to handle. Kubernetes-commit: 5ff323de791df88880f6e065f5de4b445e5c90ed
122 lines
2.8 KiB
Go
122 lines
2.8 KiB
Go
/*
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Copyright The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cache
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import (
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"fmt"
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"reflect"
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"runtime"
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"strings"
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)
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func nameForHandler(handler ResourceEventHandler) (name string) {
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defer func() {
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// Last resort: let Sprintf handle it.
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if name == "" {
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name = fmt.Sprintf("%T", handler)
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}
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}()
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if handler == nil {
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return ""
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}
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switch handler := handler.(type) {
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case *ResourceEventHandlerFuncs:
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return nameForHandlerFuncs(*handler)
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case ResourceEventHandlerFuncs:
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return nameForHandlerFuncs(handler)
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default:
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// We can use the fully qualified name of whatever
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// provides the interface. We don't care whether
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// it contains fields or methods which provide
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// the interface methods.
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value := reflect.ValueOf(handler)
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if value.Type().Kind() == reflect.Interface {
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// Probably not needed, but let's play it safe.
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value = value.Elem()
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}
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if value.Type().Kind() == reflect.Pointer {
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if !value.IsNil() {
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value = value.Elem()
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}
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}
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name := value.Type().PkgPath()
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if name != "" {
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name += "."
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}
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if typeName := value.Type().Name(); typeName != "" {
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name += typeName
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}
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return name
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}
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}
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func nameForHandlerFuncs(funcs ResourceEventHandlerFuncs) string {
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return nameForFunctions(funcs.AddFunc, funcs.UpdateFunc, funcs.DeleteFunc)
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}
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func nameForFunctions(fs ...any) string {
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// If all functions are defined in the same place, then we
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// don't care about the actual function name in
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// e.g. "main.FuncName" or "main.(*Foo).FuncName-fm", instead
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// we use the common qualifier.
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//
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// But we don't know that yet, so we also collect all names.
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var qualifier string
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singleQualifier := true
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var names []string
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for _, f := range fs {
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if f == nil {
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continue
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}
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name := nameForFunction(f)
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if name == "" {
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continue
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}
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names = append(names, name)
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newQualifier := name
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index := strings.LastIndexByte(newQualifier, '.')
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if index > 0 {
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newQualifier = newQualifier[:index]
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}
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switch qualifier {
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case "":
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qualifier = newQualifier
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case newQualifier:
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// So far, so good...
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default:
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// Nope, different.
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singleQualifier = false
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}
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}
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if singleQualifier {
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return qualifier
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}
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return strings.Join(names, "+")
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}
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func nameForFunction(f any) string {
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fn := runtime.FuncForPC(reflect.ValueOf(f).Pointer())
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if fn == nil {
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return ""
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}
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return fn.Name()
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}
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