The first example of CORBA, Visibroker implementation
1. Write the interface bank.idl
Module Bank {
Interface account {¢
Float balance ();
}
Interface AccountManager {
Account Open (in string name);
}
}
2, compile Bank.IDL with idl2java command
Command: idl2java bank.idl
Command: javac -classpath c: /bdp/lib/vbjorb.jar * .java
Generate a Bank folder and related java files, then compile these files, C: / BDP is the installation path of Visibroker.
3, realize server.java
Import Org.omg.PortablesRver. *;
Import bank. *;
Import java.util. *;
Public class server {
Public static void main (String [] args) {
Try {
Properties Properties = New Properties ();
Properties.SetProperty ("Vbroker.Addr", "LocalHost");
Properties.SetProperty ("Vbroker.Agent.port", "14000");
Properties.Put ("Org.omg.Corba.orbclass", "com.inprise.vbroker.orb.orb");
Properties.put ("Org.omg.Corba.orbsingletonclass", "com.inprise.vbroker.orb.orbsingleton");
Properties.Put ("javax.rmi.corba.stubclass", "com.inprise.vbroker.rmi.corba.stubimpl");
Properties.Put ("javax.rmi.corba.utilclass", "com.inprise.vbroker.rmi.corba.utilimpl");
Properties.put ("javax.rmi.corba.portableremoteObjectclass", "com.inprise.vbroker.rmi.corba.portableremoteObjectImpl"); ?????
Org.omg.corba.orb orb = org.omg.corba.orb.init (ARGS, Properties);
Poa rootpoa = poahelper.narrow (orb.resolve_initial_reference));
Org.omg.corba.policy [] policies = {
Rootpoa.create_lifespan_policy (LifeSpanPolicyValue.Persister)
}
Poa mypoa = rootpoa.create_poa ("Bank_Agent_poa", Rootpoa.The_Poamanager (),
POLICIES);
AccountManagerImpl ManagerSerVant = New AccountManagerImpl ();
Byte [] ManagerId = "BankManager" .GetBytes ();
Rootpoa.the_poamanager (). Activate (); system.out.println (Mypoa.Servant_to_Reference (ManagerServant)
"is ready.");
Orb.run ();
}
Catch (Exception E) {
E.PrintStackTrace ();
}
}
}
4, realize client.java
Import bank. *;
Import java.util. *;
Public class client {
Public static void main (String [] args) {
Properties Properties = New Properties ();
Properties.SetProperty ("Vbroker.Addr", "LocalHost");
Properties.SetProperty ("Vbroker.Agent.port", "14000");
Org.omg.corba.orb orb = org.omg.corba.orb.init (ARGS, Properties);
Byte [] ManagerId = "BankManager" .GetBytes ();
Bank.accountManager Manager =
Bank.accountManagerHelper.bind (ORB, "/ Bank_Agent_poa", ManagerID);
String name = args.length> 0? Args [0]: "Tom";
Bank.account account = manager.open (name);
Float Balance = Account.balance ();
System.out.println ("The Balance in" Name "'S Account IS $" Balance);
}
}
5, realize AccountImpl
Import bank. *;
Public Class AccountImpl Extends Bank.accountpoa {
Public AccountIMPL (Float Balance) {
_balance = balance;
}
Public float balance () {
Return_balance;
}
Private float _balance;
}
6. Implement AccountManagerImpl
Import Org.omg.PortablesRver. *;
Import bank. *;
Import java.util. *;
Public class accountmanagerImpl Extends Bank.accountManagerpoa {
Public synchronized bank.account open (string name) {
Bank.account Account = (Bank.account) _Accounts.get (name);
IF (Account == NULL) {
Float balance = math.abs (_random.nextint ())% 100000 /
100F
;
AccountImpl AccountServant = New AccountImpl (Balance);
Try {
Account = Bank.accountHelper.narrow (_default_poa (). servant_to_reference);} catch (Exception E) {
E.PrintStackTrace ();
}
System.out.println ("Created" Name "'S Account:" Account);
_Accounts.put (name, account);
}
Return Accent;
}
Private Dictionary _accounts = new hashtable ();
Private random _random = new random ();
}
7, compile server and client
Compile all files with javac * .java command to generate a Class.
Command: javac -classpath c: /bdp/lib/vbjorb.jar ;. * .java
8, run SmartAgent
Command: OSAgent
9, run the server
Command: VBJ Server or Start VBJ Server, Start is used to open a new window
10, run the client
Command: VBJ Client
Run results: The Balance In Tom's Account IS $ 992.8, get it.
