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config.go
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config.go
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/*
* Copyright 2020 The Knative 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 channel
import (
corev1 "k8s.io/api/core/v1"
"knative.dev/eventing/pkg/configmap"
"knative.dev/eventing/pkg/kncloudevents"
knconfigmap "knative.dev/pkg/configmap"
)
// EventDispatcherConfigMap is the name of the configmap for event dispatcher.
const EventDispatcherConfigMap = "config-imc-event-dispatcher"
var defaultEventDispatcherConfig = EventDispatcherConfig{
ConnectionArgs: kncloudevents.ConnectionArgs{
MaxIdleConns: defaultMaxIdleConnections,
MaxIdleConnsPerHost: defaultMaxIdleConnectionsPerHost,
},
}
// EventDispatcherConfig holds the configuration parameters for the event dispatcher.
type EventDispatcherConfig struct {
kncloudevents.ConnectionArgs
}
// NewEventDisPatcherConfigFromConfigMap converts a k8s configmap into EventDispatcherConfig.
func NewEventDisPatcherConfigFromConfigMap(config *corev1.ConfigMap) (EventDispatcherConfig, error) {
c := EventDispatcherConfig{}
requests := []configmap.ReadIntRequest{
{
Key: "MaxIdleConnections",
DefaultValue: defaultMaxIdleConnections,
Field: &c.MaxIdleConns,
},
{
Key: "MaxIdleConnectionsPerHost",
DefaultValue: defaultMaxIdleConnectionsPerHost,
Field: &c.MaxIdleConnsPerHost,
},
}
err := configmap.ReadInt(requests, config)
return c, err
}
// EventDispatcherConfigStore loads/unloads untyped configuration from configmap.
type EventDispatcherConfigStore struct {
logger knconfigmap.Logger
*knconfigmap.UntypedStore
}
// NewEventDispatcherConfigStore creates a configuration Store
func NewEventDispatcherConfigStore(logger knconfigmap.Logger, onAfterStore ...func(name string, value interface{})) *EventDispatcherConfigStore {
return &EventDispatcherConfigStore{
logger: logger,
UntypedStore: knconfigmap.NewUntypedStore(
"event_dispatcher",
logger,
knconfigmap.Constructors{
EventDispatcherConfigMap: NewEventDisPatcherConfigFromConfigMap,
},
onAfterStore...,
),
}
}
// GetConfig returns the current config in the store.
func (s *EventDispatcherConfigStore) GetConfig() EventDispatcherConfig {
config := s.UntypedStore.UntypedLoad(EventDispatcherConfigMap)
if config == nil {
// This should only happen in tests where we don't watch for the configmap and therefore the
// store is not populated with data.
s.logger.Errorf("Failed to load config from store, return default config: %v.", defaultEventDispatcherConfig)
return defaultEventDispatcherConfig
}
return config.(EventDispatcherConfig)
}