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root_config.go
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root_config.go
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/*
* Licensed to the Apache Software Foundation (ASF) 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
import (
_ "net/http/pprof"
"sync"
)
import (
hessian "github.com/apache/dubbo-go-hessian2"
"github.com/dubbogo/gost/log/logger"
"github.com/knadh/koanf"
perrors "github.com/pkg/errors"
"go.uber.org/atomic"
)
import (
"dubbo.apache.org/dubbo-go/v3/common"
"dubbo.apache.org/dubbo-go/v3/common/constant"
"dubbo.apache.org/dubbo-go/v3/common/extension"
"dubbo.apache.org/dubbo-go/v3/config_center"
"dubbo.apache.org/dubbo-go/v3/metadata/service/exporter"
)
var (
startOnce sync.Once
exporting = &atomic.Bool{}
)
// RootConfig is the root config
type RootConfig struct {
Application *ApplicationConfig `validate:"required" yaml:"application" json:"application,omitempty" property:"application"`
Protocols map[string]*ProtocolConfig `validate:"required" yaml:"protocols" json:"protocols" property:"protocols"`
Registries map[string]*RegistryConfig `yaml:"registries" json:"registries" property:"registries"`
ConfigCenter *CenterConfig `yaml:"config-center" json:"config-center,omitempty"` // TODO ConfigCenter and CenterConfig?
MetadataReport *MetadataReportConfig `yaml:"metadata-report" json:"metadata-report,omitempty" property:"metadata-report"`
Provider *ProviderConfig `yaml:"provider" json:"provider" property:"provider"`
Consumer *ConsumerConfig `yaml:"consumer" json:"consumer" property:"consumer"`
Metric *MetricConfig `yaml:"metrics" json:"metrics,omitempty" property:"metrics"`
Tracing map[string]*TracingConfig `yaml:"tracing" json:"tracing,omitempty" property:"tracing"`
Logger *LoggerConfig `yaml:"logger" json:"logger,omitempty" property:"logger"`
Shutdown *ShutdownConfig `yaml:"shutdown" json:"shutdown,omitempty" property:"shutdown"`
Router []*RouterConfig `yaml:"router" json:"router,omitempty" property:"router"`
EventDispatcherType string `default:"direct" yaml:"event-dispatcher-type" json:"event-dispatcher-type,omitempty"`
CacheFile string `yaml:"cache_file" json:"cache_file,omitempty" property:"cache_file"`
Custom *CustomConfig `yaml:"custom" json:"custom,omitempty" property:"custom"`
Profiles *ProfilesConfig `yaml:"profiles" json:"profiles,omitempty" property:"profiles"`
TLSConfig *TLSConfig `yaml:"tls_config" json:"tls_config,omitempty" property:"tls_config"`
}
func SetRootConfig(r RootConfig) {
rootConfig = &r
}
// Prefix dubbo
func (RootConfig) Prefix() string {
return constant.Dubbo
}
func GetRootConfig() *RootConfig {
return rootConfig
}
func GetProviderConfig() *ProviderConfig {
if err := check(); err == nil && rootConfig.Provider != nil {
return rootConfig.Provider
}
return NewProviderConfigBuilder().Build()
}
func GetConsumerConfig() *ConsumerConfig {
if err := check(); err == nil && rootConfig.Consumer != nil {
return rootConfig.Consumer
}
return NewConsumerConfigBuilder().Build()
}
func GetApplicationConfig() *ApplicationConfig {
return rootConfig.Application
}
func GetShutDown() *ShutdownConfig {
if err := check(); err == nil && rootConfig.Shutdown != nil {
return rootConfig.Shutdown
}
return NewShutDownConfigBuilder().Build()
}
// getRegistryIds get registry ids
func (rc *RootConfig) getRegistryIds() []string {
ids := make([]string, 0)
for key := range rc.Registries {
ids = append(ids, key)
}
return removeDuplicateElement(ids)
}
func registerPOJO() {
hessian.RegisterPOJO(&common.MetadataInfo{})
hessian.RegisterPOJO(&common.ServiceInfo{})
hessian.RegisterPOJO(&common.URL{})
}
// Init is to start dubbo-go framework, load local configuration, or read configuration from config-center if necessary.
// It's deprecated for user to call rootConfig.Init() manually, try config.Load(config.WithRootConfig(rootConfig)) instead.
func (rc *RootConfig) Init() error {
registerPOJO()
if err := rc.Logger.Init(); err != nil { // init default logger
return err
}
if err := rc.ConfigCenter.Init(rc); err != nil {
logger.Infof("[Config Center] Config center doesn't start")
logger.Debugf("config center doesn't start because %s", err)
} else {
if err := rc.Logger.Init(); err != nil { // init logger using config from config center again
return err
}
}
if err := rc.Application.Init(); err != nil {
return err
}
// init user define
if err := rc.Custom.Init(); err != nil {
return err
}
// init protocol
protocols := rc.Protocols
if len(protocols) <= 0 {
protocol := &ProtocolConfig{}
protocols = make(map[string]*ProtocolConfig, 1)
protocols[constant.Dubbo] = protocol
rc.Protocols = protocols
}
for _, protocol := range protocols {
if err := protocol.Init(); err != nil {
return err
}
}
// init registry
registries := rc.Registries
if registries != nil {
for _, reg := range registries {
if err := reg.Init(); err != nil {
return err
}
}
}
if err := rc.MetadataReport.Init(rc); err != nil {
return err
}
if err := rc.Metric.Init(); err != nil {
return err
}
for _, t := range rc.Tracing {
if err := t.Init(); err != nil {
return err
}
}
if err := initRouterConfig(rc); err != nil {
return err
}
// provider、consumer must last init
if err := rc.Provider.Init(rc); err != nil {
return err
}
if err := rc.Consumer.Init(rc); err != nil {
return err
}
if err := rc.Shutdown.Init(); err != nil {
return err
}
SetRootConfig(*rc)
// todo if we can remove this from Init in the future?
rc.Start()
return nil
}
func (rc *RootConfig) Start() {
startOnce.Do(func() {
gracefulShutdownInit()
rc.Consumer.Load()
rc.Provider.Load()
// todo if register consumer instance or has exported services
exportMetadataService()
registerServiceInstance()
})
}
// newEmptyRootConfig get empty root config
func newEmptyRootConfig() *RootConfig {
newRootConfig := &RootConfig{
ConfigCenter: NewConfigCenterConfigBuilder().Build(),
MetadataReport: NewMetadataReportConfigBuilder().Build(),
Application: NewApplicationConfigBuilder().Build(),
Registries: make(map[string]*RegistryConfig),
Protocols: make(map[string]*ProtocolConfig),
Tracing: make(map[string]*TracingConfig),
Provider: NewProviderConfigBuilder().Build(),
Consumer: NewConsumerConfigBuilder().Build(),
Metric: NewMetricConfigBuilder().Build(),
Logger: NewLoggerConfigBuilder().Build(),
Custom: NewCustomConfigBuilder().Build(),
Shutdown: NewShutDownConfigBuilder().Build(),
}
return newRootConfig
}
func NewRootConfigBuilder() *RootConfigBuilder {
return &RootConfigBuilder{rootConfig: newEmptyRootConfig()}
}
type RootConfigBuilder struct {
rootConfig *RootConfig
}
func (rb *RootConfigBuilder) SetApplication(application *ApplicationConfig) *RootConfigBuilder {
rb.rootConfig.Application = application
return rb
}
func (rb *RootConfigBuilder) AddProtocol(protocolID string, protocolConfig *ProtocolConfig) *RootConfigBuilder {
rb.rootConfig.Protocols[protocolID] = protocolConfig
return rb
}
func (rb *RootConfigBuilder) AddRegistry(registryID string, registryConfig *RegistryConfig) *RootConfigBuilder {
rb.rootConfig.Registries[registryID] = registryConfig
return rb
}
func (rb *RootConfigBuilder) SetProtocols(protocols map[string]*ProtocolConfig) *RootConfigBuilder {
rb.rootConfig.Protocols = protocols
return rb
}
func (rb *RootConfigBuilder) SetRegistries(registries map[string]*RegistryConfig) *RootConfigBuilder {
rb.rootConfig.Registries = registries
return rb
}
func (rb *RootConfigBuilder) SetMetadataReport(metadataReport *MetadataReportConfig) *RootConfigBuilder {
rb.rootConfig.MetadataReport = metadataReport
return rb
}
func (rb *RootConfigBuilder) SetProvider(provider *ProviderConfig) *RootConfigBuilder {
rb.rootConfig.Provider = provider
return rb
}
func (rb *RootConfigBuilder) SetConsumer(consumer *ConsumerConfig) *RootConfigBuilder {
rb.rootConfig.Consumer = consumer
return rb
}
func (rb *RootConfigBuilder) SetMetric(metric *MetricConfig) *RootConfigBuilder {
rb.rootConfig.Metric = metric
return rb
}
func (rb *RootConfigBuilder) SetLogger(logger *LoggerConfig) *RootConfigBuilder {
rb.rootConfig.Logger = logger
return rb
}
func (rb *RootConfigBuilder) SetShutdown(shutdown *ShutdownConfig) *RootConfigBuilder {
rb.rootConfig.Shutdown = shutdown
return rb
}
func (rb *RootConfigBuilder) SetRouter(router []*RouterConfig) *RootConfigBuilder {
rb.rootConfig.Router = router
return rb
}
func (rb *RootConfigBuilder) SetEventDispatcherType(eventDispatcherType string) *RootConfigBuilder {
rb.rootConfig.EventDispatcherType = eventDispatcherType
return rb
}
func (rb *RootConfigBuilder) SetCacheFile(cacheFile string) *RootConfigBuilder {
rb.rootConfig.CacheFile = cacheFile
return rb
}
func (rb *RootConfigBuilder) SetConfigCenter(configCenterConfig *CenterConfig) *RootConfigBuilder {
rb.rootConfig.ConfigCenter = configCenterConfig
return rb
}
func (rb *RootConfigBuilder) SetCustom(customConfig *CustomConfig) *RootConfigBuilder {
rb.rootConfig.Custom = customConfig
return rb
}
func (rb *RootConfigBuilder) SetShutDown(shutDownConfig *ShutdownConfig) *RootConfigBuilder {
rb.rootConfig.Shutdown = shutDownConfig
return rb
}
func (rb *RootConfigBuilder) Build() *RootConfig {
return rb.rootConfig
}
func exportMetadataService() {
ms, err := extension.GetLocalMetadataService(constant.DefaultKey)
if err != nil {
logger.Warnf("could not init metadata service", err)
return
}
if !IsProvider() || exporting.Load() {
return
}
// In theory, we can use sync.Once
// But sync.Once is not reentrant.
// Now the invocation chain is createRegistry -> tryInitMetadataService -> metadataServiceExporter.export
// -> createRegistry -> initMetadataService...
// So using sync.Once will result in dead lock
exporting.Store(true)
expt := extension.GetMetadataServiceExporter(constant.DefaultKey, ms)
if expt == nil {
logger.Warnf("get metadata service exporter failed, pls check if you import _ \"dubbo.apache.org/dubbo-go/v3/metadata/service/exporter/configurable\"")
return
}
err = expt.Export(nil)
if err != nil {
logger.Errorf("could not export the metadata service, err = %s", err.Error())
return
}
// report interface-app mapping
err = publishMapping(expt)
if err != nil {
logger.Errorf("Publish interface-application mapping failed, got error %#v", err)
}
}
// OnEvent only handle ServiceConfigExportedEvent
func publishMapping(sc exporter.MetadataServiceExporter) error {
urls := sc.GetExportedURLs()
for _, u := range urls {
err := extension.GetGlobalServiceNameMapping().Map(u)
if err != nil {
return perrors.WithMessage(err, "could not map the service: "+u.String())
}
}
return nil
}
// Process receive changing listener's event, dynamic update config
func (rc *RootConfig) Process(event *config_center.ConfigChangeEvent) {
logger.Infof("CenterConfig process event:\n%+v", event)
config := NewLoaderConf(WithBytes([]byte(event.Value.(string))))
koan := GetConfigResolver(config)
updateRootConfig := &RootConfig{}
if err := koan.UnmarshalWithConf(rc.Prefix(),
updateRootConfig, koanf.UnmarshalConf{Tag: "yaml"}); err != nil {
logger.Errorf("CenterConfig process unmarshalConf failed, got error %#v", err)
return
}
// dynamically update register
for registerId, updateRegister := range updateRootConfig.Registries {
register := rc.Registries[registerId]
register.DynamicUpdateProperties(updateRegister)
}
// dynamically update consumer
rc.Consumer.DynamicUpdateProperties(updateRootConfig.Consumer)
}