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event.go
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event.go
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// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 config
// Event Constant
const (
UpdateType = "UPDATE"
DeleteType = "DELETE"
CreateType = "CREATE"
)
type Event struct {
EventSource string
EventType string
Key string
Value string
HasUpdated bool
}
func newEvent(eventSource, eventType string, key string, value string) *Event {
return &Event{
EventSource: eventSource,
EventType: eventType,
Key: key,
Value: value,
HasUpdated: false,
}
}
func PopulateEvents(source string, currentConfig, updatedConfig map[string]string) ([]*Event, error) {
events := make([]*Event, 0)
// generate create and update event
for key, value := range updatedConfig {
currentValue, ok := currentConfig[key]
if !ok { // if new configuration introduced
events = append(events, newEvent(source, CreateType, key, value))
} else if currentValue != value {
events = append(events, newEvent(source, UpdateType, key, value))
}
}
// generate delete event
for key, value := range currentConfig {
_, ok := updatedConfig[key]
if !ok { // when old config not present in new config
events = append(events, newEvent(source, DeleteType, key, value))
}
}
return events, nil
}