CORBA

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CORBA
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A CORBA example

• From url
• http//java.sun.com/developer/technicalArticles/re
  leases/corba/
• The transient server example

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The IDL file, Add.idl

• module ArithApp
• interface Add
• const unsigned short SIZE10
• typedef long arraySIZE
• void addArrays(in array a, in array b,
• out array result)

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Use idl compiler to compile this file

• promptgt idlj -fall Add.idl
• This command will generate several files. Check
  the local directory where you run the command
  from to see the files. You will notice that a new
  subdirectory with the name ArithApp has been
  created. This is because an OMG IDL module is
  mapped to a Java package. For more information on
  the idlj compiler and the options you can use,
  please see the IDL-to-Java Compiler.

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AddImpl.java implements the idl

• import ArithApp.
• import org.omg.CORBA.
• class AddImpl extends AddPOA
• private ORB orb
• public AddImpl(ORB orb)
• this.orb orb
• // implement the addArrays() method
• public void addArrays(int a, int b,
• ArithApp.AddPackage.arrayHolder result)
• result.value new intArithApp.Add.SIZE
• for(int i0 iltArithApp.Add.SIZE i)
• result.valuei ai bi

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AddServer

• AddServer.java in notes section

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AddClient

• AddClient.java in notes

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Compile these files

• promptgt javac .java ArithApp/.java

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To run the application

• Start the orbd, which is a name server promptgt
  orbd -ORBInitialPort 2500
• The number 2500 is the port number where you want
  the orbd to run. Note that the -ORBInitialPort is
  a require command-line argument. Start the
  AddServer promptgt java AddServer
  -ORBInitialPort 2500
• Start the AddClient promptgt java AddClient
  -ORBInitialPort 2500

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Run orbd at ORBInitialPort 2500
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Run server
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Run client
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Persistent server
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Persistent serverstart server tool-this 2nd
example not completed