/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation", "Tapestry"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
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*
* 5. Products derived from this software may not be called "Apache"
* or "Tapestry", nor may "Apache" or "Tapestry" appear in their
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*
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* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.tapestry.vlib.pages;
import java.rmi.RemoteException;
import javax.ejb.FinderException;
import javax.ejb.RemoveException;
import org.apache.tapestry.ApplicationRuntimeException;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.html.BasePage;
import org.apache.tapestry.vlib.VirtualLibraryEngine;
import org.apache.tapestry.vlib.ejb.Book;
import org.apache.tapestry.vlib.ejb.IOperations;
/**
* Presents a confirmation page before deleting a book. If the user
* selects "yes", the book is deleted; otherwise the user is returned
* to the {@link MyLibrary} page.
*
* @author Howard Lewis Ship
* @version $Id: ConfirmBookDelete.java,v 1.8 2003/05/28 13:41:42 hlship Exp $
*
**/
public abstract class ConfirmBookDelete extends BasePage
{
public abstract void setBookId(Integer bookId);
public abstract void setBookTitle(String title);
/**
* Invoked (by {@link MyLibrary}) to select a book to be
* deleted. This method sets the temporary page properties
* (bookPrimaryKey and bookTitle) and invoked {@link IRequestCycle#setPage(IPage)}.
*
**/
public void selectBook(Integer bookId, IRequestCycle cycle)
{
setBookId(bookId);
VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
int i = 0;
while (true)
{
try
{
IOperations operations = vengine.getOperations();
Book book = operations.getBook(bookId);
setBookTitle(book.getTitle());
break;
}
catch (FinderException ex)
{
throw new ApplicationRuntimeException(ex);
}
catch (RemoteException ex)
{
vengine.rmiFailure("Remote exception reading read book #" + bookId + ".", ex, i++);
}
}
cycle.activate(this);
}
/**
* Hooked up to the yes component, this actually deletes the book.
*
**/
public void deleteBook(IRequestCycle cycle)
{
Object[] parameters = cycle.getServiceParameters();
Integer bookPK = (Integer) parameters[0];
VirtualLibraryEngine vengine = (VirtualLibraryEngine) getEngine();
Book book = null;
int i = 0;
while (true)
{
try
{
IOperations operations = vengine.getOperations();
book = operations.deleteBook(bookPK);
break;
}
catch (RemoveException ex)
{
throw new ApplicationRuntimeException(ex);
}
catch (RemoteException ex)
{
vengine.rmiFailure("Remote exception deleting book #" + bookPK + ".", ex, i++);
}
}
MyLibrary myLibrary = (MyLibrary) cycle.getPage("MyLibrary");
myLibrary.setMessage(format("book-deleted", book.getTitle()));
myLibrary.activate(cycle);
}
}