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// **********************************************************************
//
// Copyright (c) 2003-2014 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
import Demo.*;
class LibraryI extends _LibraryDisp
{
@Override
public synchronized BookPrx
createBook(BookDescription description, Ice.Current current)
throws DatabaseException, BookExistsException
{
BookPrx book = isbnToBook(description.isbn, current.adapter);
try
{
book.ice_ping();
//
// The book already exists.
//
throw new BookExistsException();
}
catch(Ice.ObjectNotExistException e)
{
//
// Book doesn't exist, ignore the exception.
//
}
//
// Create a new book Servant.
//
BookI bookI = new BookI(this);
bookI.description = description;
Ice.Identity ident = createBookIdentity(description.isbn);
//
// Create a new Ice Object in the evictor, using the new
// identity and the new Servant.
//
// This can throw EvictorDeactivatedException (which indicates
// an internal error). The exception is currently ignored.
//
_evictor.add(bookI, ident);
try
{
//
// Add the isbn number to the authors map.
//
String[] isbnSeq = _authors.get(description.authors);
int length = (isbnSeq == null) ? 0 : isbnSeq.length;
String[] newIsbnSeq = new String[length+1];
if(isbnSeq != null)
{
System.arraycopy(isbnSeq, 0, newIsbnSeq, 0, length);
}
newIsbnSeq[length] = description.isbn;
_authors.fastPut(description.authors, newIsbnSeq);
return book;
}
catch(Freeze.DatabaseException ex)
{
DatabaseException e = new DatabaseException();
e.message = ex.message;
throw e;
}
}
//
// No locking is necessary since no internal mutable state is
// accessed.
//
@Override
public BookPrx
findByIsbn(String isbn, Ice.Current current)
throws DatabaseException
{
try
{
BookPrx book = isbnToBook(isbn, current.adapter);
book.ice_ping();
return book;
}
catch(Ice.ObjectNotExistException ex)
{
//
// Book doesn't exist, return a null proxy.
//
return null;
}
}
@Override
public synchronized BookPrx[]
findByAuthors(String authors, Ice.Current current)
throws DatabaseException
{
try
{
//
// Lookup all books that match the given authors, and
// return them to the caller.
//
String[] isbnSeq = _authors.get(authors);
int length = (isbnSeq == null) ? 0 : isbnSeq.length;
BookPrx[] books = new BookPrx[length];
if(isbnSeq != null)
{
for(int i = 0; i < length; ++i)
{
books[i] = isbnToBook(isbnSeq[i], current.adapter);
}
}
return books;
}
catch(Freeze.DatabaseException ex)
{
DatabaseException e = new DatabaseException();
e.message = ex.message;
throw e;
}
}
@Override
public void
setEvictorSize(int size, Ice.Current current)
throws DatabaseException
{
//
// No synchronization necessary, _evictor is immutable.
//
_evictor.setSize(size);
}
@Override
public void
shutdown(Ice.Current current)
{
current.adapter.getCommunicator().shutdown();
}
protected synchronized void
remove(BookDescription description)
throws DatabaseException
{
try
{
String[] isbnSeq = _authors.get(description.authors);
assert isbnSeq != null;
int i;
for(i = 0; i < isbnSeq.length; ++i)
{
if(isbnSeq[i].equals(description.isbn))
{
break;
}
}
assert i < isbnSeq.length;
if(isbnSeq.length == 1)
{
//
// If there are no further associated isbn numbers then remove
// the record.
//
_authors.fastRemove(description.authors);
}
else
{
//
// Remove the isbn number from the sequence and write
// back the new record.
//
String[] newIsbnSeq = new String[isbnSeq.length-1];
System.arraycopy(isbnSeq, 0, newIsbnSeq, 0, i);
if(i < isbnSeq.length - 1)
{
System.arraycopy(isbnSeq, i+1, newIsbnSeq, i, isbnSeq.length - i - 1);
}
_authors.fastPut(description.authors, newIsbnSeq);
}
//
// This can throw EvictorDeactivatedException (which
// indicates an internal error). The exception is
// currently ignored.
//
_evictor.remove(createBookIdentity(description.isbn));
}
catch(Freeze.DatabaseException ex)
{
DatabaseException e = new DatabaseException();
e.message = ex.message;
throw e;
}
}
LibraryI(Ice.Communicator communicator, String envName, String dbName, Freeze.Evictor evictor)
{
_evictor = evictor;
_connection = Freeze.Util.createConnection(communicator, envName);
_authors = new StringIsbnSeqDict(_connection, dbName, true);
}
void
close()
{
_authors.close();
_connection.close();
}
private Ice.Identity
createBookIdentity(String isbn)
{
//
// Note that the identity category is important since the
// locator was installed for the category 'book'.
//
Ice.Identity ident = new Ice.Identity();
ident.category = "book";
ident.name = isbn;
return ident;
}
private BookPrx
isbnToBook(String isbn, Ice.ObjectAdapter adapter)
{
return BookPrxHelper.uncheckedCast(adapter.createProxy(createBookIdentity(isbn)));
}
private Freeze.Evictor _evictor;
private Freeze.Connection _connection;
private StringIsbnSeqDict _authors;
}
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