用 Proxy 简化加锁代码，用 ReadWriteLock 以提高并行性

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用 java.lang.reflect.Proxy 简化加锁代码，用 ReadWriteLock 以提高并行性

 

有一个 CoreManager 接口，用来代表一个服务，每个方法对应服务的一个子功能。

 

方法 startup() 要求服务在 stoped 状态。

方法 shutdown() 要求服务在 started 状态。

方法 isStarted() 要求服务在 stoped/started 状态。

其它方法，要求服务在 started 状态。

 

 

/**   * All mehtod will throw {@link ManageException} then Target server stoped.   *   */ public interface CoreManager {         // ------- Target Server Control ---------------------------       /**         * Shutdown Target Server Core.         *           * @throws ManageException startup error         */       public void startup() throws ManageException;         /**         * Shutdown Target Server Core.         *           * @throws ManageException shutdown error         */       public void shutdown() throws ManageException;             /**         * return ture if Target Server is started         * @return the result         *           */       public boolean isStarted();             /**         * Reconfigure the log setting         *         * @param logConfig         * @throws ManageException         */       public void configureLog(LogConfig logConfig) throws ManageException;         // ------- Component Manage-------------------------------       /**         * Add component.         *         * @param componentInfo         * @throws ManageException add fail.         */       public void addComponent(AbstractComponentBean componentInfo)                   throws ManageException;         /**         * Return all component names.         *         * @return not null         * @throws ManageException         */       public String[] getAllComponentNames() throws ManageException;         /**         * Return the component setting.         *         * @param componentName         * @return result not null         * @throws ManageException component not found         */       public AbstractComponentBean getComponentInfo(String componentName)                   throws ManageException;         /**         * Remove component.         *         * @param componentName         * @throws ManageException component not found         */       public void removeComponent(String componentName) throws ManageException;         /**         * Apply new routing graph         *         * @deprecated use {@link #setNewRouting(ComponentConnector[])} instead         * @param routingBeans         * @return ture only if all connector is seted         * @throws ManageException         */       @Deprecated       public boolean setNewRouting(ConnectorBean[] routingBeans) throws ManageException;         /**         * Apply new routing graph         *         * @param routingBeans         * @return ture only if all connector is seted         * @throws ManageException         */       public boolean setNewRouting(ComponentConnector[] routingBeans) throws ManageException;         /**         * Change component setting         *         * @param componentBean         * @throws ManageException component not found         */       public void changeComponentSetting(AbstractComponentBean componentBean)                   throws ManageException;         /**         * Return true if component exsit.         *         * @param componentName         * @return the result         * @throws ManageException         */       public boolean isComponentExist(String componentName) throws ManageException;         /**         * Get the device component status.         * If the component in componentNames not exist, UNKNOWN will return.         *         * @param componentNames         * @return result         * @throws ManageException         */       public ConnectionStatus[] getDeviceComponentStatus(String[] componentNames) throws ManageException;         /**         * Set the enabled property of component.         *         * @param componentName         * @param enabled         * @throws ManageException component not found.         */       public void setComponentEnabledProperty(String componentName,                   boolean enabled) throws ManageException;         // ------- Reader Control ----------------------------------       public void setAutoModeOn(String deviceName) throws ManageException;         public void setAutoModeOff(String deviceName) throws ManageException;         public String getVersionNumber(String readerName) throws ManageException;         public long getNumberOfReads(String readerName) throws ManageException;         public long [] getNumberOfReads(String[] readerNames) throws ManageException;         public Collection readTags(String readerName)                   throws ManageException;         public Collection readTags(String readerName, int antennaSequenceNo)                   throws ManageException;         public Collection readTags(String readerName,                   int [] antennaSequenceNo) throws ManageException;         public void writeTag(String deviceName, String writeFlag, String epc,                   String userData, String killCode, int antennaSequenceNo)                   throws ManageException;         public void killTag(String deviceName, String uri, String killCode,                   int antennaSequence) throws ManageException;         public void setReadPower(String deviceName, int powerPercent)                   throws ManageException;         /**         * Send a command(Event) to a component         *         * @param targetCompName         * @param event         * @return may null         * @throws ManageException Component not found/stoped.         */       public Object sendEvent2Component(String targetCompName, Object event)                   throws ManageException;         /**         * Send a command(Event) to a component         *         * @param targetCompName         * @param srcCompInfo         * @param event         * @return may null         * @throws ManageException Component not found/stoped.         */       public Object sendComponentEvent2Component(String targetCompName,                   ConnectorEndpoint srcCompInfo, Object event)                   throws ManageException;                   public List getAllConnectors() throws ManageException;         public void addConnector(ComponentConnector connector) throws ManageException;         public void removeConnector(ComponentConnector connector) throws ManageException;   }

 

 

有这样一个最核心的实现：

 

public class ManagerImpl implements CoreManager {         private final TargetServerCore TargetServer ;         private static final Log log = LogFactory.getLog( ManagerImpl. class );         public ManagerImpl(TargetServerCore TargetServer) {             this . TargetServer = TargetServer;