在CLIENT端输入圆半径让SERVER传回计算后圆的周长

1、RMI Math範例(JDK 1.2.2)問題: 在CLIENT端輸入圓半徑讓SERVER傳回計算後圓的周長1. 開啟新Project，命名為math.jpr2. INTERFACE (新增Mathe.java檔案到Project)package math;public interface Mathe extends java.rmi.Remotepublic double getRadius(double r) throws java.rmi.RemoteException;3. Implement (新增MatheImpl.java檔案到Project)package math;impor

2、t java.rmi.*;import java.lang.Math;import java.rmi.Naming;import java.rmi.server.UnicastRemoteObject;public class MatheImpl extends UnicastRemoteObject implements Mathepublic MatheImpl() throws RemoteExceptionsuper();public double getRadius(double r) throws RemoteExceptionreturn 2*Math.PI*r;public s

3、tatic void main(String args)System.setSecurityManager(new RMISecurityManager();tryMatheImpl math=new MatheImpl();Naming.rebind(rmi:/45/MathServer,math);System.out.println(server start.);catch(Exception e)System.out.println(Server error:+e);System.exit(0);4. File-New-Applet (產生MatheApplet

4、1.java及MatheApplet1.html)package math;import java.awt.*;import java.awt.event.*;import java.applet.*;import java.rmi.*;public class MatheApplet1 extends Applet boolean isStandalone = false; Label label1 = new Label(); TextField radius = new TextField(); Label label2 = new Label(); TextField result =

5、 new TextField(); Button send = new Button(); Mathe ma; double res; /Get a parameter value public String getParameter(String key, String def) return isStandalone ? System.getProperty(key, def) : (getParameter(key) != null ? getParameter(key) : def); /Construct the applet public MatheApplet1() /Initi

6、alize the applet public void init() try jbInit(); catch(Exception e) e.printStackTrace(); /Component initialization private void jbInit() throws Exception label1.setBounds(new Rectangle(37, 14, 89, 36); label1.setFont(new java.awt.Font(Dialog, 0, 14); label1.setForeground(Color.red); label1.setText(

7、請輸入圓半徑); this.setLayout(null); radius.setBackground(Color.white); radius.setBounds(new Rectangle(157, 17, 114, 31); label2.setBounds(new Rectangle(37, 111, 69, 32); label2.setFont(new java.awt.Font(Dialog, 0, 14); label2.setForeground(Color.blue); label2.setText(圓週長是); result.setBackground(SystemCol

8、); result.setBounds(new Rectangle(108, 110, 230, 43); send.setBackground(Color.pink); send.setBounds(new Rectangle(108, 63, 68, 32); send.setLabel(送出); send.addActionListener(new java.awt.event.ActionListener() public void actionPerformed(ActionEvent e) send_actionPerformed(e); ); this.add(la

9、bel1, null); this.add(radius, null); this.add(label2, null); this.add(result, null); this.add(send, null); try/若尋找遠端主機的物件，就建立物件ma=(Mathe)Naming.lookup(/+ getCodeBase().getHost()+/MathServer); result.setText(連接成功); catch(Exception e) result.setText(連接失敗);System.err.println(無法連接+e); void send_actionPe

10、rformed(ActionEvent e) try /傳出去dluble的參數並取得回傳值res=ma.getRadius(Double.valueOf(radius.getText().doubleValue();result.setText(String.valueOf(res); /將回傳值顯示在周長欄位 catch(RemoteException re) result.setText(無法傳回值);result.setText(無法連接+re); 5. MatheImpl.java檔按下滑鼠右鍵編輯Property，Generate RMI stub/skeleton選項打勾6. 編

11、譯整個Project7. Deployment 整個Project，壓縮成為math.jar檔8. 編輯MatheApplet1.html檔，新增一列ARCHIVE敘述math.MatheApplet1 will appear below in a Java enabled browser.APPLET CODEBASE = .ARCHIVE = 45/MyJava/classes/math.jar CODE = math.MatheApplet1.class 9. 存檔執行時注意事項1. 安裝HTTP WEB SERVER2. Jbuilder 3.5中J

12、AVA RMI程式的Project Properties中的Run Application的VM parameters要設為-Djava.rmi.server.codebase=http:/local host(IP_ADDRESS)/MyJava/classes/ -Djava.security.policy=http:/local host(IP_ADDRESS)/MyJava/src/policy.java上面兩行參數中間要加一個空格其中MyJava為JAVA原始程式所在目錄位置，並於HTTP WEB SERVER中登錄3. 以文書編輯器編輯Policy.Java檔，編輯完後要放於跟RM

13、I原始程式不童子目錄中grant / Allow everything for now permission java.security.AllPermission; permission .SocketPermissionIP_ADDRESS:1024-,listen,accept,connect;4.於WEB SERVER新增目錄，指向RMI程式所在位置的目錄名稱。然後啟動HTTP WEB SERVER.5. 啟動TOOLS-RMIREGISTRY6. Jbuilder3.5中 MatheImpl.java檔讓其執行7. 下面視窗中應該會顯示server start8. 開始-程式集-附屬

14、應用程式-MS-DOS模式，螢幕顯示C:WINDOWS9. C:WINDOWSSET PATH=C:Jbuilder35jdk1.2.2bin10. C:WINDOWSappletviewer http:/IP_ADDRESS/MyJava/src/MatheApplet1.htmlCorba VisiBroker Hello World範例(JDK 1.2.2)問題: 在CLIENT端執行Server之jsp程式，Server端回應”Hello World”字串1. 開啟新Project，命名為hello_corba.jpr，Project的Required Libraries必須包含Vis

15、iBroker9. IDL (新增hello.idl檔案到Project，該IDL檔定義存取介面，定義之後編譯該IDL檔)module helloworld interface say_hello string say(); ;10. Implement (新增say_helloImpl.java檔案到Project)package hello_corba;public class say_helloImpl extends hello_corba.helloworld.say_helloPOA public say_helloImpl() public String say() return

16、 Hello World; 11. Server程式 於JBuilder 選 File-New， 於Object Gallery選Enterprise，然後選CORBA Server Application，按下OK鈕，如下圖:下圖視窗之IDL file指向目前的hello.idl，確認無誤後按下OK完成後之project pane如下所示，新增3個模組12. Client程式於JBuilder 選 File-New， 於Object Gallery選Enterprise，然後選CORBA Server Application，按下OK鈕，如下圖:下圖視窗之IDL file指向目前的hello

17、.idl，確認無誤後按下OK013. 編譯整個Project14. 存檔15. 於Jbuilder3.5中，用滑鼠選擇TOOLS-VisiBroker Smart Agent，按下執行Smart Agent於Jbuilder3.5左上方project pane中，用滑鼠點選helloworldServerApp.java，然後按下滑鼠右鍵，選擇Run，啟動server，如下所示16. 於Jbuilder3.5左上方project pane中，用滑鼠點選Formhelloworld.jsp，然後按下滑鼠右鍵，選擇Run，啟動jsp.17. 開啟IE，輸入位址http:/localhost:808

18、0/src/hello_corba/Formhelloworld.jsp 按下say鈕後，出現Hello World字樣Voyager CORBA應用程式開發步驟1. 定義介面idl2. Compile idl3. 實做idl介面4. 設計Server程式5. 設計Client程式6. Compile Server及Client程式7. 執行Server程式8. 執行Client程式程式範例Voyager client/server application in CORBA modeVoyager安裝完後，於examples目錄中的corba子目錄，有一些程式範例，茲以其中的array範例來說

19、明。Array的程式目的是把client端傳來的陣列，計算陣列中的整數元素總和，另外依據client端所定義的倍率大小，來做簡易陣列乘法。1. idl介面(Imath.idl)module array /模組名稱array typedef sequence LongSequence; / bounded typedef long LongArray 3 ; typedef sequence sequence LongMatrix; / unbounded interface IMath long addLongSequence( in LongSequence numbers ); long

20、addLongArray( in LongArray numbers ); void multiMatrix( inout LongMatrix matrix, in long n ); ; ;2. 使用 cgen d 來compile IMath.idl3. 實做idl定義的函式 (Math.java)package voyager_array;public class Math implements array.IMath /實做array模組的IMath介面 public int addLongSequence( int numbers ) /sequence元素加總 int total

21、 = 0; for( int i = 0; i numbers.length; i+ ) total += numbers i ; return total; public int addLongArray( int numbers ) /array元素加總 int total = 0; for( int i = 0; i numbers.length; i+ ) total += numbers i ; return total; public void multiMatrix( array.LongMatrixHolder matrix, int n ) int x_dim = matri

22、x.value.length; int y_dim = matrix.value 0 .length; System.out.println( multiply + x_dim + by + y_dim + array ); for( int x = 0; x x_dim; x+ ) for( int y = 0; y y_dim; y+ ) matrix.value x y *= n; /將陣列元素乘以n倍 4. Server程式(Server.java)package voyager_array;import java.io.RandomAccessFile;import com.obje

23、ctspace.voyager.*;import com.objectspace.voyager.corba.*;public class Server static array.IMath math; public static void main( String args ) try Voyager.startup(); /啟動Voyager math = new Math(); / create bank String ior = Corba.asIOR( math ); / get IOR for object System.out.println( math IOR = + ior

24、); / display IOR RandomAccessFile file = new RandomAccessFile( Math.IOR, rw ); file.writeUTF( ior ); / write IOR to file,供client來讀取file、存取ior及bind file.close(); System.out.println( CORBA server is ready ); catch( Exception exception ) System.err.println( exception ); 5. Client程式(Client.java)package

25、voyager_array;import java.io.RandomAccessFile;import com.objectspace.voyager.*;import com.objectspace.voyager.corba.*;public class Client public static void main( String args ) try Voyager.startup(); RandomAccessFile file = new RandomAccessFile( Math.IOR, r ); String ior = file.readUTF(); / read IOR

26、 from file file.close(); System.out.println( math IOR = + ior ); / display IOR array.IMath math = (array.IMath) Namespace.lookup( ior ); /尋找ior int total1 = math.addLongArray( new int 2, 6, 8 ); System.out.println( 2 + 6 + 8 = + total1 ); int total2 = math.addLongSequence( new int 1, 5, 6, 8 ); Syst

27、em.out.println( 1 + 5 + 6 + 8 = + total2 ); array.LongMatrixHolder matrix = new array.LongMatrixHolder( new int 2, 3, 1 , 4, 6, 7 ); System.out.println( matrix before = + asString( matrix.value ) ); math.multiMatrix( matrix, 2 ); System.out.println( matrix after = + asString( matrix.value ) ); catch

28、( Exception exception ) System.err.println( exception ); Voyager.shutdown(); private static String asString( int matrix ) /將陣列數值元素轉換為字串方式顯示 int x_dim = matrix.length; int y_dim = matrix 0 .length; StringBuffer buffer = new StringBuffer(); for( int x = 0; x x_dim; x+ ) buffer.append( ); for( int y =

29、0; y y_dim; y+ ) buffer.append( matrix x y + ); buffer.append( ) ); return buffer.toString(); Voyager Mobility能力示範程式開發步驟9. 定義介面idl程式10. 利用cgen編譯idl11. 實做idl介面12. 設計Action程式13. Compile程式14. 執行Action程式程式範例1. (hello.idl) module hello interface IHello void sayHi(in string msg); ; ;2.cgen hello.idl, 會產生IHello.java及IHelloHolder.java3.idl實做(helloImpl.java)package voyager_hello;import java.io.*; public class hel