/*
* JBoss, Home of Professional Open Source
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags.
* See the copyright.txt in the distribution for a full listing
* of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2005-2006,
* @author JBoss Inc.
*/
/*
* Copyright (C) 2003, 2004
* Arjuna Technologies Limited
* Newcastle upon Tyne, UK
*
* $Id: BankImpl.java 2342 2006-03-30 13:06:17Z $
*/
package com.arjuna.demo.jts.txojbank;
import com.arjuna.ats.arjuna.ObjectType;
import com.arjuna.ats.arjuna.common.Uid;
import com.arjuna.ats.arjuna.state.InputObjectState;
import com.arjuna.ats.arjuna.state.OutputObjectState;
import com.arjuna.ats.txoj.Lock;
import com.arjuna.ats.txoj.LockManager;
import com.arjuna.ats.txoj.LockMode;
import com.arjuna.ats.txoj.LockResult;
import com.arjuna.orbportability.OA;
import java.util.Hashtable;
/**
*
* The object is also available remotely under transactional control ensuring that no partial accounts are commited to
* the underlying datastore (for this example, the file system).
*/
public class BankImpl extends LockManager implements BankOperations
{
/**
* The maximum number of accounts that this bank can hold.
*/
private static final int ACCOUNT_SIZE = 10;
/**
* The accounts at this bank.
*/
private Hashtable _accounts = new Hashtable(ACCOUNT_SIZE);
/**
* The uids of all the accounts.
*/
private String[] accounts = new String[ACCOUNT_SIZE];
/**
* The current number of accounts that this bank holds.
*/
private int currentNumberOfAccounts = 0;
/**
* The object adapter to use to obtain the IORs of the bank account objects.
*/
private OA _oa;
/**
* Create a new bank with the object adapter to use to create account object references.
*
* @param oa The object adapter to create account object references with.
*/
public BankImpl(OA oa)
{
// Set the type of this LockManager object, ANDPERSISTENT indicates that this object can participate in
// transactions and is persisted to disk. Other types include RECOVERABLE (if the object can only particpate in
// transactions) NEITHER (if the object can neither participate in transactions, nor be transactionally recovered)
// of UNKNOWN_TYPE (if this object is initialized invalid - to be handled later)
super(ObjectType.ANDPERSISTENT);
_oa = oa;
}
/**
* Restore a bank object.
*
* @param uid The UID of this bank.
* @param oa The object adapter to use to resolve and return <CODE>Account</CODE> references.
*/
public BankImpl(Uid uid, OA oa)
{
// Recreate this object from its UID
super(uid);
_oa = oa;
}
/**
* Create a new bank account under transactional control.
*
* @param name The name of the account.
*
* @return A CORBA object of the account.
*/
public Account create_account(String name)
{
AccountImpl acc;
AccountPOA account = null;
if (setlock(new Lock(LockMode.WRITE), 0) == LockResult.GRANTED)
{
if (currentNumberOfAccounts < ACCOUNT_SIZE)
{
acc = new AccountImpl(name);
account = new AccountPOATie(acc);
_accounts.put(name, acc);
accounts[currentNumberOfAccounts] = acc.get_uid().toString();
currentNumberOfAccounts++;
}
}
return com.arjuna.demo.jts.txojbank.AccountHelper.narrow(_oa.corbaReference(account));
}
/**
* Get the account object.
*
* @param name The name of the account to get.
* @return The account object.
*
* @throws NotExistingAccount If the account did not exist.
*/
public Account get_account(String name) throws NotExistingAccount
{
AccountImpl acc = (AccountImpl) _accounts.get(name);
AccountPOA account = new AccountPOATie(acc);
if (acc == null)
throw new NotExistingAccount("The Account requested does not exist");
return com.arjuna.demo.jts.txojbank.AccountHelper.narrow(_oa.corbaReference(account));
}
/**
* Save the current state of this object.
*
* @param os The stream to write to.
* @param ObjectType The type of the object (used in super call).
*
* @return A boolean indicating the success of the save.
*/
public boolean save_state(OutputObjectState os, int ObjectType)
{
if (!super.save_state(os, ObjectType))
return false;
try
{
os.packInt(currentNumberOfAccounts);
if (currentNumberOfAccounts > 0)
{
for (int i = 0; i < currentNumberOfAccounts; i++)
os.packString(accounts[i]);
}
return true;
}
catch (Exception e)
{
return false;
}
}
/**
* Restore the object to the state indicated. Restore state should not perform any business logic.
*
* @param os The stream to read the previous state from.
* @param ObjectType The type of the object to super with.
*
* @return A boolean indicating the success of the unpack operations.
*/
public boolean restore_state(InputObjectState os, int ObjectType)
{
if (!super.restore_state(os, ObjectType))
{
return false;
}
try
{
currentNumberOfAccounts = os.unpackInt();
if (currentNumberOfAccounts > 0)
{
for (int i = 0; i < currentNumberOfAccounts; i++)
{
accounts[i] = os.unpackString();
AccountImpl acc = new AccountImpl(new Uid(accounts[i]));
acc.activate();
_accounts.put(acc.getName(), acc);
}
}
return true;
}
catch (Exception e)
{
return false;
}
}
/**
* The type of this <CODE>LockManager</CODE>. This is used by Arjuna to determine the objectstore location to save
* the objects state within.
*
* @return The type of the lock manager.
*/
public String type()
{
return "/StateManager/LockManager/BankServer";
}
}