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service_impl.go
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/
service_impl.go
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// Copyright (C) 2022 PuzzleDB Contributors.
//
// 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 query
import (
"crypto/tls"
"github.com/cybergarage/go-logger/log"
"github.com/cybergarage/puzzledb-go/puzzledb/auth"
"github.com/cybergarage/puzzledb-go/puzzledb/coordinator"
"github.com/cybergarage/puzzledb-go/puzzledb/plugins"
docStore "github.com/cybergarage/puzzledb-go/puzzledb/plugins/store"
"github.com/cybergarage/puzzledb-go/puzzledb/plugins/store/kvcache"
"github.com/cybergarage/puzzledb-go/puzzledb/store"
)
const (
ConfigTLS = "tls"
)
// BaseService represent a query base service.
type BaseService struct {
plugins.Config
coordinator coordinator.Coordinator
store store.Store
auth.AuthManager
tlsConfig *tls.Config
}
// NewBaseService returns a new query base service.
func NewBaseService() *BaseService {
server := &BaseService{
Config: plugins.NewConfig(),
store: nil,
coordinator: nil,
AuthManager: nil,
tlsConfig: nil,
}
return server
}
// ServiceType returns the plug-in service type.
func (service *BaseService) ServiceType() plugins.ServiceType {
return plugins.QueryService
}
// SetCoordinator sets the coordinator.
func (service *BaseService) SetCoordinator(coordinator coordinator.Coordinator) {
service.coordinator = coordinator
}
// Coordinator returns the coordinator.
func (service *BaseService) Coordinator() coordinator.Coordinator {
return service.coordinator
}
// postDatabaseMessage posts a schema message to the coordinator.
func (service *BaseService) postDatabaseMessage(e coordinator.EventType, database string) error {
obj := &DatabaseMessageObject{
Database: database,
}
msg, err := coordinator.NewMessageWith(
coordinator.DatabaseMessage,
e,
obj,
)
if err != nil {
return err
}
return service.coordinator.PostMessage(msg)
}
// PostDatabaseCreateMessage posts a create database message to the coordinator.
func (service *BaseService) PostDatabaseCreateMessage(database string) error {
return service.postDatabaseMessage(coordinator.UpdatedEvent, database)
}
// PostDatabaseDeleteMessage posts a update database message to the coordinator.
func (service *BaseService) PostDatabaseUpdateMessage(database string) error {
return service.postDatabaseMessage(coordinator.UpdatedEvent, database)
}
// PostDatabaseDropMessage posts a drop database message to the coordinator.
func (service *BaseService) PostDatabaseDropMessage(database string) error {
return service.postDatabaseMessage(coordinator.DeletedEvent, database)
}
// postCollectionMessage posts a schema message to the coordinator.
func (service *BaseService) postCollectionMessage(e coordinator.EventType, database string, collection string) error {
obj := &CollectionMessageObject{
Database: database,
Collection: collection,
}
msg, err := coordinator.NewMessageWith(
coordinator.CollectionMessage,
e,
obj,
)
if err != nil {
return err
}
return service.coordinator.PostMessage(msg)
}
// PostCollectionCreateMessage posts a create collection message to the coordinator.
func (service *BaseService) PostCollectionCreateMessage(database string, collection string) error {
return service.postCollectionMessage(coordinator.UpdatedEvent, database, collection)
}
// PostCollectionDeleteMessage posts a update collection message to the coordinator.
func (service *BaseService) PostCollectionUpdateMessage(database string, collection string) error {
return service.postCollectionMessage(coordinator.UpdatedEvent, database, collection)
}
// PostCollectionDropMessage posts a drop collection message to the coordinator.
func (service *BaseService) PostCollectionDropMessage(database string, collection string) error {
return service.postCollectionMessage(coordinator.DeletedEvent, database, collection)
}
// OnMessageReceived is called when a message is received from the coordinator.
func (service *BaseService) OnMessageReceived(msg coordinator.Message) {
switch msg.Event() { // nolint:exhaustive
case coordinator.UpdatedEvent, coordinator.DeletedEvent:
store := service.Store()
kvStore, ok := store.(kvcache.CacheStore)
if !ok {
return
}
switch msg.Type() { // nolint:gocritic, exhaustive
case coordinator.DatabaseMessage:
var msgObj DatabaseMessageObject
if err := msg.UnmarshalTo(&msgObj); err != nil {
log.Error(err)
return
}
if err := kvStore.EraseDatabaseCache(msgObj.Database); err != nil {
log.Error(err)
}
case coordinator.CollectionMessage:
var msgObj CollectionMessageObject
if err := msg.UnmarshalTo(&msgObj); err != nil {
log.Error(err)
return
}
if err := kvStore.EraseCollectionCache(msgObj.Database, msgObj.Collection); err != nil {
log.Error(err)
}
}
}
}
// SetStore sets the store.
func (service *BaseService) SetStore(store store.Store) {
service.store = store
// Register the cache key prefix for the database and collection.
kvDocStore, ok := store.(docStore.DocumentKvStore)
if !ok {
return
}
kvStore := kvDocStore.KvStore()
cacheStore, ok := kvStore.(kvcache.CacheStore)
if !ok {
return
}
cacheStore.EnableDatabaseCache()
cacheStore.EnableCollectionCache()
}
// Store returns the store.
func (service *BaseService) Store() store.Store {
return service.store
}
// SetAuthManager sets the auth manager.
func (service *BaseService) SetAuthManager(mgr auth.AuthManager) {
service.AuthManager = mgr
}
// Authenticators returns all authenticators.
func (service *BaseService) Authenticators() []auth.Authenticator {
return []auth.Authenticator{}
}
// SetTLSConfig sets the TLS configuration.
func (service *BaseService) SetTLSConfig(tlsConfig *tls.Config) {
service.tlsConfig = tlsConfig
}
// TLSConfig returns the TLS configuration.
func (service *BaseService) TLSConfig() (*tls.Config, bool) {
if service.tlsConfig == nil {
return nil, false
}
return service.tlsConfig, true
}