diff options
Diffstat (limited to 'kube2msb/src/vendor/k8s.io/kubernetes/pkg/util/errors/errors.go')
-rw-r--r-- | kube2msb/src/vendor/k8s.io/kubernetes/pkg/util/errors/errors.go | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/kube2msb/src/vendor/k8s.io/kubernetes/pkg/util/errors/errors.go b/kube2msb/src/vendor/k8s.io/kubernetes/pkg/util/errors/errors.go deleted file mode 100644 index 0445c14..0000000 --- a/kube2msb/src/vendor/k8s.io/kubernetes/pkg/util/errors/errors.go +++ /dev/null @@ -1,156 +0,0 @@ -/* -Copyright 2015 The Kubernetes Authors. - -Licensed under the Apache License, Version 2.0 (the "License"); -you may not use this file except in compliance with the License. -You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - -Unless required by applicable law or agreed to in writing, software -distributed under the License is distributed on an "AS IS" BASIS, -WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -See the License for the specific language governing permissions and -limitations under the License. -*/ - -package errors - -import ( - "errors" - "fmt" -) - -// Aggregate represents an object that contains multiple errors, but does not -// necessarily have singular semantic meaning. -type Aggregate interface { - error - Errors() []error -} - -// NewAggregate converts a slice of errors into an Aggregate interface, which -// is itself an implementation of the error interface. If the slice is empty, -// this returns nil. -func NewAggregate(errlist []error) Aggregate { - if len(errlist) == 0 { - return nil - } - return aggregate(errlist) -} - -// This helper implements the error and Errors interfaces. Keeping it private -// prevents people from making an aggregate of 0 errors, which is not -// an error, but does satisfy the error interface. -type aggregate []error - -// Error is part of the error interface. -func (agg aggregate) Error() string { - if len(agg) == 0 { - // This should never happen, really. - return "" - } - if len(agg) == 1 { - return agg[0].Error() - } - result := fmt.Sprintf("[%s", agg[0].Error()) - for i := 1; i < len(agg); i++ { - result += fmt.Sprintf(", %s", agg[i].Error()) - } - result += "]" - return result -} - -// Errors is part of the Aggregate interface. -func (agg aggregate) Errors() []error { - return []error(agg) -} - -// Matcher is used to match errors. Returns true if the error matches. -type Matcher func(error) bool - -// FilterOut removes all errors that match any of the matchers from the input -// error. If the input is a singular error, only that error is tested. If the -// input implements the Aggregate interface, the list of errors will be -// processed recursively. -// -// This can be used, for example, to remove known-OK errors (such as io.EOF or -// os.PathNotFound) from a list of errors. -func FilterOut(err error, fns ...Matcher) error { - if err == nil { - return nil - } - if agg, ok := err.(Aggregate); ok { - return NewAggregate(filterErrors(agg.Errors(), fns...)) - } - if !matchesError(err, fns...) { - return err - } - return nil -} - -// matchesError returns true if any Matcher returns true -func matchesError(err error, fns ...Matcher) bool { - for _, fn := range fns { - if fn(err) { - return true - } - } - return false -} - -// filterErrors returns any errors (or nested errors, if the list contains -// nested Errors) for which all fns return false. If no errors -// remain a nil list is returned. The resulting silec will have all -// nested slices flattened as a side effect. -func filterErrors(list []error, fns ...Matcher) []error { - result := []error{} - for _, err := range list { - r := FilterOut(err, fns...) - if r != nil { - result = append(result, r) - } - } - return result -} - -// Flatten takes an Aggregate, which may hold other Aggregates in arbitrary -// nesting, and flattens them all into a single Aggregate, recursively. -func Flatten(agg Aggregate) Aggregate { - result := []error{} - if agg == nil { - return nil - } - for _, err := range agg.Errors() { - if a, ok := err.(Aggregate); ok { - r := Flatten(a) - if r != nil { - result = append(result, r.Errors()...) - } - } else { - if err != nil { - result = append(result, err) - } - } - } - return NewAggregate(result) -} - -// AggregateGoroutines runs the provided functions in parallel, stuffing all -// non-nil errors into the returned Aggregate. -// Returns nil if all the functions complete successfully. -func AggregateGoroutines(funcs ...func() error) Aggregate { - errChan := make(chan error, len(funcs)) - for _, f := range funcs { - go func(f func() error) { errChan <- f() }(f) - } - errs := make([]error, 0) - for i := 0; i < cap(errChan); i++ { - if err := <-errChan; err != nil { - errs = append(errs, err) - } - } - return NewAggregate(errs) -} - -// ErrPreconditionViolated is returned when the precondition is violated -var ErrPreconditionViolated = errors.New("precondition is violated") |