mirror of
https://github.com/ceph/ceph-csi.git
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5af3fe5deb
this commits add the controller runtime and its dependency to the vendor. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
138 lines
3.6 KiB
Go
138 lines
3.6 KiB
Go
/*
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Copyright 2018 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 log
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import (
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"sync"
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"github.com/go-logr/logr"
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)
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// loggerPromise knows how to populate a concrete logr.Logger
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// with options, given an actual base logger later on down the line.
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type loggerPromise struct {
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logger *DelegatingLogger
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childPromises []*loggerPromise
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promisesLock sync.Mutex
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name *string
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tags []interface{}
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}
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// WithName provides a new Logger with the name appended
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func (p *loggerPromise) WithName(l *DelegatingLogger, name string) *loggerPromise {
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res := &loggerPromise{
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logger: l,
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name: &name,
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promisesLock: sync.Mutex{},
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}
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p.promisesLock.Lock()
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defer p.promisesLock.Unlock()
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p.childPromises = append(p.childPromises, res)
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return res
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}
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// WithValues provides a new Logger with the tags appended
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func (p *loggerPromise) WithValues(l *DelegatingLogger, tags ...interface{}) *loggerPromise {
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res := &loggerPromise{
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logger: l,
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tags: tags,
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promisesLock: sync.Mutex{},
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}
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p.promisesLock.Lock()
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defer p.promisesLock.Unlock()
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p.childPromises = append(p.childPromises, res)
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return res
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}
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// Fulfill instantiates the Logger with the provided logger
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func (p *loggerPromise) Fulfill(parentLogger logr.Logger) {
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var logger = parentLogger
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if p.name != nil {
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logger = logger.WithName(*p.name)
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}
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if p.tags != nil {
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logger = logger.WithValues(p.tags...)
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}
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p.logger.Logger = logger
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p.logger.promise = nil
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for _, childPromise := range p.childPromises {
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childPromise.Fulfill(logger)
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}
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}
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// DelegatingLogger is a logr.Logger that delegates to another logr.Logger.
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// If the underlying promise is not nil, it registers calls to sub-loggers with
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// the logging factory to be populated later, and returns a new delegating
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// logger. It expects to have *some* logr.Logger set at all times (generally
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// a no-op logger before the promises are fulfilled).
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type DelegatingLogger struct {
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logr.Logger
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promise *loggerPromise
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}
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// WithName provides a new Logger with the name appended
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func (l *DelegatingLogger) WithName(name string) logr.Logger {
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if l.promise == nil {
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return l.Logger.WithName(name)
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}
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res := &DelegatingLogger{Logger: l.Logger}
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promise := l.promise.WithName(res, name)
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res.promise = promise
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return res
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}
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// WithValues provides a new Logger with the tags appended
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func (l *DelegatingLogger) WithValues(tags ...interface{}) logr.Logger {
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if l.promise == nil {
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return l.Logger.WithValues(tags...)
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}
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res := &DelegatingLogger{Logger: l.Logger}
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promise := l.promise.WithValues(res, tags...)
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res.promise = promise
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return res
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}
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// Fulfill switches the logger over to use the actual logger
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// provided, instead of the temporary initial one, if this method
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// has not been previously called.
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func (l *DelegatingLogger) Fulfill(actual logr.Logger) {
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if l.promise != nil {
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l.promise.Fulfill(actual)
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}
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}
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// NewDelegatingLogger constructs a new DelegatingLogger which uses
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// the given logger before it's promise is fulfilled.
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func NewDelegatingLogger(initial logr.Logger) *DelegatingLogger {
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l := &DelegatingLogger{
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Logger: initial,
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promise: &loggerPromise{promisesLock: sync.Mutex{}},
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}
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l.promise.logger = l
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return l
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}
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