mirror of https://github.com/knative/pkg.git
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
/*
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Copyright 2019 The Knative 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 injection
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import (
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"context"
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"k8s.io/client-go/rest"
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)
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// ClientInjector holds the type of a callback that attaches a particular
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// client type to a context.
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type ClientInjector func(context.Context, *rest.Config) context.Context
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// ClientFetcher holds the type of a callback that returns a particular client type
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// from a context.
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type ClientFetcher func(context.Context) interface{}
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func (i *impl) RegisterClient(ci ClientInjector) {
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i.m.Lock()
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defer i.m.Unlock()
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i.clients = append(i.clients, ci)
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}
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func (i *impl) GetClients() []ClientInjector {
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i.m.RLock()
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defer i.m.RUnlock()
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// Copy the slice before returning.
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return append(i.clients[:0:0], i.clients...)
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}
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func (i *impl) RegisterClientFetcher(f ClientFetcher) {
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i.m.Lock()
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defer i.m.Unlock()
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i.clientFetchers = append(i.clientFetchers, f)
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}
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func (i *impl) FetchAllClients(ctx context.Context) []interface{} {
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i.m.RLock()
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defer i.m.RUnlock()
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clients := make([]interface{}, 0, len(i.clientFetchers))
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for _, f := range i.clientFetchers {
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clients = append(clients, f(ctx))
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}
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return clients
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}
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