Add: new feature to support dynamic config center which compatible with dubbo 2.6.x & 2.7.x

.gitignore

@@ -29,4 +29,4 @@ coverage.txt
 # unit test
 remoting/zookeeper/zookeeper-4unittest/
 config_center/zookeeper/zookeeper-4unittest/
-registry/zookeeper/zookeeper-4unittest/
+registry/zookeeper/zookeeper-4unittest/

before_ut.sh

@@ -0,0 +1,4 @@
+mkdir -p remoting/zookeeper/zookeeper-4unittest/contrib/fatjar config_center/zookeeper/zookeeper-4unittest/contrib/fatjar registry/zookeeper/zookeeper-4unittest/contrib/fatjar
+wget -P "remoting/zookeeper/zookeeper-4unittest/contrib/fatjar" https://github.com/dubbogo/resources/raw/master/zookeeper-4unitest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar
+cp remoting/zookeeper/zookeeper-4unittest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar config_center/zookeeper/zookeeper-4unittest/contrib/fatjar/
+cp remoting/zookeeper/zookeeper-4unittest/contrib/fatjar/zookeeper-3.4.9-fatjar.jar registry/zookeeper/zookeeper-4unittest/contrib/fatjar/

cluster/directory/base_directory.go

@@ -42,6 +42,9 @@ func NewBaseDirectory(url *common.URL) BaseDirectory {
 func (dir *BaseDirectory) GetUrl() common.URL {
 	return *dir.url
 }
+func (dir *BaseDirectory) GetDirectoryUrl() *common.URL {
+	return dir.url
+}
 
 func (dir *BaseDirectory) Destroy(doDestroy func()) {
 	if dir.destroyed.CAS(false, true) {

common/config/environment.go

@@ -23,15 +23,21 @@ import (
 	"sync"
 )
 
+import (
+	"github.com/apache/dubbo-go/config_center"
+)
+
 // There is dubbo.properties file and application level config center configuration which higner than normal config center in java. So in java the
 // configuration sequence will be config center > application level config center > dubbo.properties > spring bean configuration.
 // But in go, neither the dubbo.properties file or application level config center configuration will not support for the time being.
 // We just have config center configuration which can override configuration in consumer.yaml & provider.yaml.
 // But for add these features in future ,I finish the environment struct following Environment class in java.
 type Environment struct {
-	configCenterFirst bool
-	externalConfigs   sync.Map
-	externalConfigMap sync.Map
+	configCenterFirst    bool
+	externalConfigs      sync.Map
+	externalConfigMap    sync.Map
+	appExternalConfigMap sync.Map
+	dynamicConfiguration config_center.DynamicConfiguration
 }
 
 var (
@@ -45,6 +51,9 @@ func GetEnvInstance() *Environment {
 	})
 	return instance
 }
+func NewEnvInstance() {
+	instance = &Environment{configCenterFirst: true}
+}
 
 //func (env *Environment) SetConfigCenterFirst() {
 //	env.configCenterFirst = true
@@ -60,23 +69,34 @@ func (env *Environment) UpdateExternalConfigMap(externalMap map[string]string) {
 	}
 }
 
+func (env *Environment) UpdateAppExternalConfigMap(externalMap map[string]string) {
+	for k, v := range externalMap {
+		env.appExternalConfigMap.Store(k, v)
+	}
+}
+
 func (env *Environment) Configuration() *list.List {
 	list := list.New()
-	memConf := newInmemoryConfiguration()
-	memConf.setProperties(&(env.externalConfigMap))
-	list.PushBack(memConf)
+	// The sequence would be: SystemConfiguration -> ExternalConfiguration -> AppExternalConfiguration -> AbstractConfig -> PropertiesConfiguration
+	list.PushFront(newInmemoryConfiguration(&(env.externalConfigMap)))
+	list.PushFront(newInmemoryConfiguration(&(env.appExternalConfigMap)))
 	return list
 }
 
+func (env *Environment) SetDynamicConfiguration(dc config_center.DynamicConfiguration) {
+	env.dynamicConfiguration = dc
+}
+
+func (env *Environment) GetDynamicConfiguration() config_center.DynamicConfiguration {
+	return env.dynamicConfiguration
+}
+
 type InmemoryConfiguration struct {
 	store *sync.Map
 }
 
-func newInmemoryConfiguration() *InmemoryConfiguration {
-	return &InmemoryConfiguration{}
-}
-func (conf *InmemoryConfiguration) setProperties(p *sync.Map) {
-	conf.store = p
+func newInmemoryConfiguration(p *sync.Map) *InmemoryConfiguration {
+	return &InmemoryConfiguration{store: p}
 }
 
 func (conf *InmemoryConfiguration) GetProperty(key string) (bool, string) {

common/config/environment_test.go

@@ -19,6 +19,7 @@ package config
 import (
 	"testing"
 )
+
 import (
 	"github.com/stretchr/testify/assert"
 )
@@ -38,7 +39,7 @@ func TestEnvironment_UpdateExternalConfigMap(t *testing.T) {
 func TestEnvironment_ConfigurationAndGetProperty(t *testing.T) {
 	GetEnvInstance().UpdateExternalConfigMap(map[string]string{"1": "2"})
 	list := GetEnvInstance().Configuration()
-	ok, v := list.Front().Value.(*InmemoryConfiguration).GetProperty("1")
+	ok, v := list.Back().Value.(*InmemoryConfiguration).GetProperty("1")
 	assert.True(t, ok)
 	assert.Equal(t, "2", v)
 }

common/constant/default.go

@@ -18,8 +18,14 @@
 package constant
 
 const (
-	DUBBO = "dubbo"
+	DUBBO             = "dubbo"
+	PROVIDER_PROTOCOL = "provider"
+	//compatible with 2.6.x
+	OVERRIDE_PROTOCOL = "override"
+	EMPTY_PROTOCOL    = "empty"
+	ROUTER_PROTOCOL   = "router"
 )
+
 const (
 	DEFAULT_WEIGHT = 100     //
 	DEFAULT_WARMUP = 10 * 60 // in java here is 10*60*1000 because of System.currentTimeMillis() is measured in milliseconds & in go time.Unix() is second
@@ -48,5 +54,16 @@ const (
 )
 
 const (
-	ANY_VALUE = "*"
+	ANY_VALUE           = "*"
+	ANYHOST_VALUE       = "0.0.0.0"
+	REMOVE_VALUE_PREFIX = "-"
+)
+
+const (
+	CONFIGURATORS_CATEGORY             = "configurators"
+	ROUTER_CATEGORY                    = "category"
+	DEFAULT_CATEGORY                   = PROVIDER_CATEGORY
+	DYNAMIC_CONFIGURATORS_CATEGORY     = "dynamicconfigurators"
+	APP_DYNAMIC_CONFIGURATORS_CATEGORY = "appdynamicconfigurators"
+	PROVIDER_CATEGORY                  = "providers"
 )

common/constant/key.go

@@ -22,15 +22,21 @@ const (
 )
 
 const (
-	GROUP_KEY     = "group"
-	VERSION_KEY   = "version"
-	INTERFACE_KEY = "interface"
-	PATH_KEY      = "path"
-	SERVICE_KEY   = "service"
-	METHODS_KEY   = "methods"
-	TIMEOUT_KEY   = "timeout"
-	BEAN_NAME_KEY = "bean.name"
-	GENERIC_KEY   = "generic"
+	GROUP_KEY              = "group"
+	VERSION_KEY            = "version"
+	INTERFACE_KEY          = "interface"
+	PATH_KEY               = "path"
+	SERVICE_KEY            = "service"
+	METHODS_KEY            = "methods"
+	TIMEOUT_KEY            = "timeout"
+	CATEGORY_KEY           = "category"
+	CHECK_KEY              = "check"
+	ENABLED_KEY            = "enabled"
+	SIDE_KEY               = "side"
+	OVERRIDE_PROVIDERS_KEY = "providerAddresses"
+	BEAN_NAME_KEY          = "bean.name"
+	GENERIC_KEY            = "generic"
+	CLASSIFIER_KEY         = "classifier"
 )
 
 const (
@@ -79,16 +85,23 @@ const (
 )
 
 const (
-	CONFIG_NAMESPACE_KEY = "config.namespace"
-	CONFIG_TIMEOUT_KET   = "config.timeout"
+	CONFIG_NAMESPACE_KEY  = "config.namespace"
+	CONFIG_TIMEOUT_KET    = "config.timeout"
+	CONFIG_VERSION_KEY    = "configVersion"
+	COMPATIBLE_CONFIG_KEY = "compatible_config"
 )
 const (
-	RegistryConfigPrefix  = "dubbo.registries."
-	ReferenceConfigPrefix = "dubbo.reference."
-	ServiceConfigPrefix   = "dubbo.service."
-	ProtocolConfigPrefix  = "dubbo.protocols."
-	ProviderConfigPrefix  = "dubbo.provider."
-	ConsumerConfigPrefix  = "dubbo.consumer."
+	RegistryConfigPrefix       = "dubbo.registries."
+	SingleRegistryConfigPrefix = "dubbo.registry."
+	ReferenceConfigPrefix      = "dubbo.reference."
+	ServiceConfigPrefix        = "dubbo.service."
+	ProtocolConfigPrefix       = "dubbo.protocols."
+	ProviderConfigPrefix       = "dubbo.provider."
+	ConsumerConfigPrefix       = "dubbo.consumer."
+)
+
+const (
+	CONFIGURATORS_SUFFIX = ".configurators"
 )
 
 const (

common/extension/configurator.go

@@ -0,0 +1,60 @@
+/*
+ * 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 extension
+
+import (
+	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/config_center"
+)
+
+const DefaultKey = "default"
+
+type getConfiguratorFunc func(url *common.URL) config_center.Configurator
+
+var (
+	configurator = make(map[string]getConfiguratorFunc)
+)
+
+func SetConfigurator(name string, v getConfiguratorFunc) {
+	configurator[name] = v
+}
+
+func GetConfigurator(name string, url *common.URL) config_center.Configurator {
+	if configurator[name] == nil {
+		panic("configurator for " + name + " is not existing, make sure you have import the package.")
+	}
+	return configurator[name](url)
+
+}
+func SetDefaultConfigurator(v getConfiguratorFunc) {
+	configurator[DefaultKey] = v
+}
+
+func GetDefaultConfigurator(url *common.URL) config_center.Configurator {
+	if configurator[DefaultKey] == nil {
+		panic("configurator for default is not existing, make sure you have import the package.")
+	}
+	return configurator[DefaultKey](url)
+
+}
+func GetDefaultConfiguratorFunc() getConfiguratorFunc {
+	if configurator[DefaultKey] == nil {
+		panic("configurator for default is not existing, make sure you have import the package.")
+	}
+	return configurator[DefaultKey]
+}