mirror of https://github.com/knative/pkg.git
69 lines
1.9 KiB
Go
69 lines
1.9 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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"go.uber.org/zap"
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"k8s.io/client-go/rest"
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"knative.dev/pkg/controller"
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"knative.dev/pkg/logging"
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"knative.dev/pkg/signals"
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)
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// EnableInjectionOrDie enables Knative Client Injection, and provides a
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// callback to start the informers. Both Context and Config are optional.
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// Returns context with rest config set and a callback to start the informers
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// after watches have been set.
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//
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// Typical integration:
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// ```go
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//
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// ctx, startInformers := injection.EnableInjectionOrDie(signals.NewContext(), nil)
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// ... start watches with informers, if required ...
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// startInformers()
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//
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// ```
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func EnableInjectionOrDie(ctx context.Context, cfg *rest.Config) (context.Context, func()) {
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if ctx == nil {
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ctx = signals.NewContext()
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}
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if cfg == nil {
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cfg = ParseAndGetRESTConfigOrDie()
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}
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// Respect user provided settings, but if omitted customize the default behavior.
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if cfg.QPS == 0 {
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cfg.QPS = rest.DefaultQPS
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}
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if cfg.Burst == 0 {
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cfg.Burst = rest.DefaultBurst
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}
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ctx = WithConfig(ctx, cfg)
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ctx, informers := Default.SetupInformers(ctx, cfg)
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return ctx, func() {
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logging.FromContext(ctx).Info("Starting informers...")
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if err := controller.StartInformers(ctx.Done(), informers...); err != nil {
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logging.FromContext(ctx).Fatalw("Failed to start informers", zap.Error(err))
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}
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}
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}
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