Ftr: Application-level Registry Model #604
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,77 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package extension | ||
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| import ( | ||
| "sync" | ||
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| ) | ||
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| import ( | ||
| "github.com/apache/dubbo-go/common/logger" | ||
| "github.com/apache/dubbo-go/common/observer" | ||
| ) | ||
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| var ( | ||
| globalEventDispatcher observer.EventDispatcher | ||
| initEventListeners []func() observer.EventListener | ||
| initEventOnce sync.Once | ||
| ) | ||
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| var ( | ||
| dispatchers = make(map[string]func() observer.EventDispatcher, 8) | ||
| ) | ||
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| // SetEventDispatcher, actually, it doesn't really init the global dispatcher | ||
| func SetEventDispatcher(name string, v func() observer.EventDispatcher) { | ||
| dispatchers[name] = v | ||
| } | ||
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| // SetAndInitGlobalDispatcher will actually init the global dispatcher | ||
| // if there is already a global dispatcher, | ||
| // it will be override | ||
| // if the dispatcher with the name not found, it will panic | ||
| func SetAndInitGlobalDispatcher(name string) { | ||
| if len(name) == 0 { | ||
| name = "direct" | ||
| } | ||
| if globalEventDispatcher != nil { | ||
| logger.Warnf("EventDispatcher has been initialized. It will be replaced") | ||
| } | ||
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| if dp, ok := dispatchers[name]; !ok || dp == nil { | ||
| panic("EventDispatcher for " + name + " is not found, make sure you have import the package, " + | ||
| "like import _ github.com/apache/dubbo-go/common/observer/dispatcher ") | ||
| } | ||
| globalEventDispatcher = dispatchers[name]() | ||
| } | ||
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| // GetGlobalDispatcher will init all listener and then return dispatcher | ||
| func GetGlobalDispatcher() observer.EventDispatcher { | ||
| initEventOnce.Do(func() { | ||
| // we should delay to add the listeners to avoid some listeners left | ||
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| for _, l := range initEventListeners { | ||
| globalEventDispatcher.AddEventListener(l()) | ||
| } | ||
| }) | ||
| return globalEventDispatcher | ||
| } | ||
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| // AddEventListener it will be added in global event dispatcher | ||
| func AddEventListener(creator func() observer.EventListener) { | ||
| initEventListeners = append(initEventListeners, creator) | ||
| } | ||
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Remove the constant into nacos's directory.