歯 Final.PDF

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1 <JSTORM> Design Pattern - API JSTORM -1-

2 java API Public Draft HISTORY 2001/2/ jstorm pdf. -2-

3 -3-

4 caller callee interface subclass superclass getinfo() -4-

5 caller interface callee getinfo() interface->getinfo() interface getinfo() callee2 getinfo() -5-

7 : ç -7-

8 -8-

9 -9- JDBCHelper JDBCHelper() connect() close() commit() next() select() update() getstring() getstring() getint() getint() getfloat() getfloat() getdate() getdate()

10 -10-

11 -11- JDBCHelper2 JDBCHelper() connect() close() commit() next() select() update() getstring() getstring() getint() getint() getfloat() getfloat() getdate() getdate() preparedstatement() pstmtsetstring() pstmtsetfloat() pstmtsetint() pstmtsetnull() pstmtselect() pstmtupdate()

getfloat() getfloat() getdate() getdate() preparedstatement()

12 JDBCHelper3 JDBCHelper() connect() close() commit() next() select() update() getstring() getstring() getint() getint() getfloat() getfloat() getdate() getdate() preparedstatement() pstmtsetstring() pstmtsetfloat() pstmtsetint() pstmtsetnull() pstmtselect() pstmtupdate() callablestatement() cstmtsetstring() cstmtsetfloat() cstmtsetint() cstmtsetnull() cstmtupdate() cstmtregisteroutparameter() -12-

pstmtsetstring() pstmtsetfloat() pstmtsetint() pstmtsetnull() pstmtselect() pstmtupdate()

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15 ç ç ç -15-

16 ç -16-

17 JDBCHelperFactory createjdbchelper() getfactory() <<Interface>> JDBCHelperFactoryIF <<Interface>> JDBCHelper connect() close() commit() next() select() update() getstring() getstring() getint() getint() getfloat() getfloat() getdate() getdate() setstring() setfloat() setint() setnull() regoutparameter() JDBCStatementHelper JDBCPreparedStatementHelper createjdbchelper() 1. 2 PreparedStatement JDBC Helper - Factory Method Pattern -17-

getfloat() getdate() getdate() setstring() setfloat() setint() setnull() regoutparameter()

18 -18-

19 -19- JDBCHelper connect() begintransaction() commt() select() update() getstring() getstring() getint() getint() getfloat() getfloat() getdate() getdate() setstring() setfloat() setint() setnull() regoutparameter() <<Interface>> JDBCStatementHelper JDBCPreparedStatementHelper JDBCHelperFactory getfactory() JDBCHelperFactoryIF getfactory() <<Interface>> JDBCCallableStatementHelper

setnull() regoutparameter() <<Interface>> JDBCStatementHelper JDBCPreparedStatementHelper

20 CodeConverter convertfromdefault() converttodefault() createconverter() CodeConvert8859_1 convertfromdefault() converttodefault() CodeConverterKSC560 1 convertfromdefault() converttodefault() -20-

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22 -22- SQLFactory createsqlfactory() getsearchsql() AnsiSQLFactory getsearchsql() OracleSQLFactory getsearchsql() MSSQLServerSQL Factory getsearchsql()

23 -23- : (Cache Management Pattern) 1 Refactoring : :.

24 -24-

25 2 GOF : Gang of Four : Design Pattern : the reusable Object 4 GOF Book

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32 Box ç ç ç Client uses Facade class1 class Facade Pattern -32-

33 Product CreationRequestor operation1() operation2() requests-creation ConcreteProdu ct operation1() operation2() FactoryIF createproduct() Factory createproduct() 3. 4 Factory Method Pattern -33-

34 Client AbstractStrategy operation() ConcreteStrategy1 ConcreteStrategy2 operation() 4. 5 Strategy Pattern operation() -34-

35 -35-

36 ??? (Refactoring)., ,

37 Extract Method. void printowing(double amount) { printbanner(); //printdetails System.out.println( name: +_name); System.out.println( amount: +amount); }, printdetails. void printowing(double amount) { } printbanner(); printdetails(amount); void printdetails(double amount) { } System.out.println( name: +_name); System.out.println( amount: +amount); Extract Method.....,. Refactoring : Improving the Design of Existing Code,

38 . (Anti-Pattern)......,, (from : - : - : (Spaghetti Code ) :. - ( Stovepipe System ) :. - (Analysis Paralysis ) : -38-

39 . - (Swiss Army Knife ) :. - ( Ambiguous Viewpoint ) :.. - Anti Patterns : Refactoring Software, Architectures, and Projects in Crisis,1998 by William J.Brown & - Anti Patterns and Patterns in Software Configuration Management, 1998 by William J.Brown & -39-

41 System Use Case -41-

42 Produce-Consumer Model -42-

47 1. 2 : Request Diispatcher Exception -47-

48 -48-

49 : RequestDispatcher : ServerSocket : MasterThread : ServerProtocolHandler : ServerProtocolHandlerIF : ObjectInputStream : Command : ObjectOutputStream while loop start while loop end 1: ServerSocket(int) 2: accept( ) 3: MasterThread(Socket) 4: start( ) 5: getinstance( ) 6: getcommand(inputstream) 7: readobject( ) 8: execute( ) 9: send(outputstream, Object) 10: writeobject(object) -49-

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51 -51-

52 RequestDispatcher (from server) port : int RequestDispatcher() run() main() MasterThread (from server) $ SOCKET_TIME_OUT : int = MasterThread() run() -$handler ServerProtocolHa ndlerif (from server) send() getcommand() ServerProtocolHandler (from server) ServerProtocolHandler() getinstance() getcommand() send() Command (from cmd) execute() getname() -52-

53 : Client : : EchoCommand ClientProtocolHandler : ClientProtocolHandlerIF : Socket : ObjectOutputStream : ObjectInputStream 1: setstring(string) 2: connect( ) 3: Socket(String, int) 4: getinstance( ) 5: sendcommand(inputstream, OutputStream, Command) 6: writeobject(object) 7: readobject( ) -53-

54 -54-

55 ServerException (from client) Client $ SOCKET_TIME_OUT : int = port : int Client() connect() run() main() (from client) ServerException() ServerException() ClientProtocolHandler (from client) ClientProtocolHandler() getinstance() send() receive() sendcommand() EchoCommand (from cmd) setstring() execute() getname() -$handler ClientProtocolHandl erif (from client) Command sendcommand() (from cmd) execute() getname()

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59 : RequestDispatcher : ServerSocket : MasterThread : ServerProtocolHandler : ServerProtocolHandlerIF : ObjectInputStream : CommandQueue : Queue : Command : ObjectOutputStream 1: ServerSocket(int) 2: accept( ) 3: MasterThread(Socket) 4: start( ) 5: getinstance( ) 6: getcommand(inputstream) 7: readobject( ) CommandQueue.push, CommandQueue.pop added 8: push(command) 9: push(object) 10: wait() 11: execute( ) 12: send(outputstream, Object) 13: pop( ) 14: pop( ) 15: notify( ) -59-

60 Invoker AbstractCo mmand Manages 1 doit() 0..n +creator/invoker undoit() 1 CommandManager Creates-and-invokes +invokeeconcreatec ommand 0..n doit() undoit() -60-

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<C0CCBCBCBFB52DC1A4B4EBBFF82DBCAEBBE7B3EDB9AE2D313939392D382E687770> i ii iii iv v vi 1 2 3 4 가상대학 시스템의 국내외 현황 조사 가상대학 플랫폼 개발 이상적인 가상대학시스템의 미래상 제안 5 웹-기반 가상대학 시스템 전통적인 교수 방법 시간/공간 제약을 극복한 학습동기 부여 교수의 일방적인 내용전달 교수와 학생간의 상호작용 동료 학생들 간의 상호작용 가상대학 운영 공지사항,강의록 자료실, 메모 질의응답,

歯 Final.PDF

歯 Final.PDF