design-pattern-uml/out/singleton-pattern/singleton-pattern-online-commander.svg

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stroke-width: 1.5;" x1="7" x2="132" y1="217" y2="217"/><line style="stroke: #A80036; stroke-width: 1.5;" x1="7" x2="132" y1="225" y2="225"/><path d="M168.5,181 L168.5,236.9316 A0,0 0 0 0 168.5,236.9316 L492.5,236.9316 A0,0 0 0 0 492.5,236.9316 L492.5,191 L482.5,181 L308.82,181 L250.8987,121.1955 L300.82,181 L168.5,181 A0,0 0 0 0 168.5,181 " fill="#FBFB77" filter="url(#f1ulr5k438ol0d)" style="stroke: #A80036; stroke-width: 1.0;"/><path d="M482.5,181 L482.5,191 L492.5,191 L482.5,181 " fill="#FBFB77" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="299" x="174.5" y="198.5684">使用单例的地方仍有很多，在此主要是为了模拟在线</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="303" x="174.5" y="213.8789">列表，通常表现为服务器集群(虽是集群，但是数据是</text><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="303" x="174.5" y="229.1895">同步的，可以理解为只有一份)，为此而采用单例模式</text><!--link OnlineCommander to OnlineCommander--><path d="M348.6517,43.1186 C362.0713,47.5841 370.5,54.7112 370.5,64.5 C370.5,77.1562 356.41,85.363 335.6604,89.1204 " fill="none" id="OnlineCommander-OnlineCommander" style="stroke: #A80036; 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@startuml singleton-pattern-online-commander 

class OnlineCommander {
  {static} - _INSTANCE:OnlineCommander
  - OnlineCommander()
  - onlineCommanders:List<OnlineCommander>
  - pool:CommanderPool
  + {static} sharedCommanderPool():OnlineCommander
}

class CommanderPool {

}

note bottom of OnlineCommander: 使用单例的地方仍有很多，在此主要是为了模拟在线\n列表，通常表现为服务器集群(虽是集群，但是数据是\n同步的，可以理解为只有一份)，为此而采用单例模式

OnlineCommander o- - OnlineCommander
OnlineCommander o- - CommanderPool

@enduml

PlantUML version 1.2018.12(Sun Oct 21 18:15:15 CST 2018)
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