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https://github.com/ceph/ceph-csi.git
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b1a4590967
There is no release for sigs.k8s.io/controller-runtime that supports Kubernetes v1.27. The main branch has all the required modifications, so we can use that for the time being. Signed-off-by: Niels de Vos <ndevos@ibm.com>
89 lines
3.3 KiB
Go
89 lines
3.3 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 handler
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import (
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"context"
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"k8s.io/client-go/util/workqueue"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/event"
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"sigs.k8s.io/controller-runtime/pkg/reconcile"
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)
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// MapFunc is the signature required for enqueueing requests from a generic function.
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// This type is usually used with EnqueueRequestsFromMapFunc when registering an event handler.
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type MapFunc func(context.Context, client.Object) []reconcile.Request
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// EnqueueRequestsFromMapFunc enqueues Requests by running a transformation function that outputs a collection
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// of reconcile.Requests on each Event. The reconcile.Requests may be for an arbitrary set of objects
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// defined by some user specified transformation of the source Event. (e.g. trigger Reconciler for a set of objects
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// in response to a cluster resize event caused by adding or deleting a Node)
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//
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// EnqueueRequestsFromMapFunc is frequently used to fan-out updates from one object to one or more other
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// objects of a differing type.
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//
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// For UpdateEvents which contain both a new and old object, the transformation function is run on both
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// objects and both sets of Requests are enqueue.
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func EnqueueRequestsFromMapFunc(fn MapFunc) EventHandler {
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return &enqueueRequestsFromMapFunc{
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toRequests: fn,
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}
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}
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var _ EventHandler = &enqueueRequestsFromMapFunc{}
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type enqueueRequestsFromMapFunc struct {
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// Mapper transforms the argument into a slice of keys to be reconciled
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toRequests MapFunc
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}
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// Create implements EventHandler.
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func (e *enqueueRequestsFromMapFunc) Create(ctx context.Context, evt event.CreateEvent, q workqueue.RateLimitingInterface) {
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reqs := map[reconcile.Request]empty{}
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e.mapAndEnqueue(ctx, q, evt.Object, reqs)
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}
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// Update implements EventHandler.
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func (e *enqueueRequestsFromMapFunc) Update(ctx context.Context, evt event.UpdateEvent, q workqueue.RateLimitingInterface) {
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reqs := map[reconcile.Request]empty{}
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e.mapAndEnqueue(ctx, q, evt.ObjectOld, reqs)
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e.mapAndEnqueue(ctx, q, evt.ObjectNew, reqs)
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}
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// Delete implements EventHandler.
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func (e *enqueueRequestsFromMapFunc) Delete(ctx context.Context, evt event.DeleteEvent, q workqueue.RateLimitingInterface) {
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reqs := map[reconcile.Request]empty{}
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e.mapAndEnqueue(ctx, q, evt.Object, reqs)
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}
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// Generic implements EventHandler.
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func (e *enqueueRequestsFromMapFunc) Generic(ctx context.Context, evt event.GenericEvent, q workqueue.RateLimitingInterface) {
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reqs := map[reconcile.Request]empty{}
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e.mapAndEnqueue(ctx, q, evt.Object, reqs)
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}
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func (e *enqueueRequestsFromMapFunc) mapAndEnqueue(ctx context.Context, q workqueue.RateLimitingInterface, object client.Object, reqs map[reconcile.Request]empty) {
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for _, req := range e.toRequests(ctx, object) {
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_, ok := reqs[req]
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if !ok {
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q.Add(req)
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reqs[req] = empty{}
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}
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}
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}
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