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// **********************************************************************
//
// Copyright (c) 2003-2013 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.
//
// **********************************************************************
package Freeze;
public class Util
{
/**
* Returns a new background save evictor. The Berkeley DB database with the
* name given in <code>filename</code> is opened if it already exists.
* If the database does not exist yet and <code>createDb</code>
* is true, the database is created automatically; otherwise,
* <code>DatabaseException</code> is raised.
*
* @param adapter The object adapter to associate with this evictor.
* @param envName The name of the Berkeley DB database environment. The
* environment must already exist.
* @param filename The name of the Berkeley DB database file.
* @param initializer An object that is used to initialize a servant after its
* state is restored from the database, or <code>null</code> if no initializer
* is necessary.
* @param indices An array of Freeze indices, or <code>null</code if no indices
* are defined.
* @param createDb True if the Berkeley DB database should be created if it does
* not exist, false otherwise.
* @return A new background save evictor.
* @throws Freeze.DatabaseException If an error occurs during database operations.
*/
public static BackgroundSaveEvictor
createBackgroundSaveEvictor(Ice.ObjectAdapter adapter, String envName, String filename,
ServantInitializer initializer, Index[] indices, boolean createDb)
{
return new BackgroundSaveEvictorI(adapter, envName, filename, initializer, indices, createDb);
}
/**
* Returns a new background save evictor. The Berkeley DB database with the
* name given in <code>filename</code> is opened if it already exists.
* If the database does not exist yet and <code>createDb</code>
* is true, the database is created automatically; otherwise,
* <code>DatabaseException</code> is raised.
*
* @param adapter The object adapter to associate with this evictor.
* @param envName The name of the Berkeley DB database environment. The
* environment must already exist.
* @param dbEnv The database environment in which to open the database.
* @param filename The name of the Berkeley DB database file.
* @param initializer An object that is used to initialize a servant after its
* state is restored from the database, or <code>null</code> if no initializer
* is necessary.
* @param indices An array of Freeze indices, or <code>null</code if no indices
* are defined.
* @param createDb True if the Berkeley DB database should be created if it does
* not exist, false otherwise.
* @return A new background save evictor.
* @throws Freeze.DatabaseException If an error occurs during database operations.
*/
public static BackgroundSaveEvictor
createBackgroundSaveEvictor(Ice.ObjectAdapter adapter, String envName, com.sleepycat.db.Environment dbEnv,
String filename, ServantInitializer initializer, Index[] indices, boolean createDb)
{
return new BackgroundSaveEvictorI(adapter, envName, dbEnv, filename, initializer, indices, createDb);
}
/**
* Returns a new transactional evictor. The Berkeley DB database with the
* name given in <code>filename</code> is opened if it already exists.
* If the database does not exist yet and <code>createDb</code>
* is true, the database is created automatically; otherwise,
* <code>DatabaseException</code> is raised.
*
* @param adapter The object adapter to associate with this evictor.
* @param envName The name of the Berkeley DB database environment. The
* environment must already exist.
* @param filename The name of the Berkeley DB database file.
* @param facetTypes A map of facet name to Slice type id, or <code>null</code if
* no map is necessary.
* @param initializer An object that is used to initialize a servant after its
* state is restored from the database, or <code>null</code> if no initializer
* is necessary.
* @param indices An array of Freeze indices, or <code>null</code if no indices
* are defined.
* @param createDb True if the Berkeley DB database should be created if it does
* not exist, false otherwise.
* @return A new transactional evictor.
* @throws Freeze.DatabaseException If an error occurs during database operations.
*/
public static TransactionalEvictor
createTransactionalEvictor(Ice.ObjectAdapter adapter, String envName, String filename,
java.util.Map<String, String> facetTypes, ServantInitializer initializer,
Index[] indices, boolean createDb)
{
return new TransactionalEvictorI(adapter, envName, filename, facetTypes, initializer, indices, createDb);
}
/**
* Returns a new transactional evictor. The Berkeley DB database with the
* name given in <code>filename</code> is opened if it already exists.
* If the database does not exist yet and <code>createDb</code>
* is true, the database is created automatically; otherwise,
* <code>DatabaseException</code> is raised.
*
* @param adapter The object adapter to associate with this evictor.
* @param envName The name of the Berkeley DB database environment. The
* environment must already exist.
* @param dbEnv The database environment in which to open the database.
* @param filename The name of the Berkeley DB database file.
* @param facetTypes A map of facet name to Slice type id, or <code>null</code if
* no map is necessary.
* @param initializer An object that is used to initialize a servant after its
* state is restored from the database, or <code>null</code> if no initializer
* is necessary.
* @param indices An array of Freeze indices, or <code>null</code if no indices
* are defined.
* @param createDb True if the Berkeley DB database should be created if it does
* not exist, false otherwise.
* @return A new transactional evictor.
* @throws Freeze.DatabaseException If an error occurs during database operations.
*/
public static TransactionalEvictor
createTransactionalEvictor(Ice.ObjectAdapter adapter, String envName, com.sleepycat.db.Environment dbEnv,
String filename, java.util.Map<String, String> facetTypes,
ServantInitializer initializer, Index[] indices, boolean createDb)
{
return new TransactionalEvictorI(adapter, envName, dbEnv, filename, facetTypes, initializer, indices, createDb);
}
/**
* Creates a new Freeze connection using the given communicator and database
* environment.
*
* @param communicator The communicator associated with this connection.
* @param envName The name of the Berkeley DB database environment.
* @return A new Freeze connection.
* @throws Freeze.DatabaseException If an error occurs during database operations.
*/
public static Connection
createConnection(Ice.Communicator communicator, String envName)
{
return new ConnectionI(communicator, envName, null);
}
/**
* Creates a new Freeze connection using the given communicator and database
* environment.
*
* @param communicator The communicator associated with this connection.
* @param envName The name of the Berkeley DB database environment.
* @param dbEnv The database environment associated with this connection.
* @return A new Freeze connection.
* @throws Freeze.DatabaseException If an error occurs during database operations.
*/
public static Connection
createConnection(Ice.Communicator communicator, String envName, com.sleepycat.db.Environment dbEnv)
{
return new ConnectionI(communicator, envName, dbEnv);
}
/**
* Returns the database file name of the Freeze catalog.
*
* @return The database file name.
*/
public static String
catalogName()
{
return _catalogName;
}
/**
* Returns the database file name of the Freeze catalog index list.
*
* @return The database file name.
*/
public static String
catalogIndexListName()
{
return _catalogIndexListName;
}
/**
* Returns the Berkeley DB transaction object associated with a Freeze transaction.
*
* @param tx The Freeze transaction.
* @return The Berkeley DB transaction.
*/
public static com.sleepycat.db.Transaction
getTxn(Transaction tx)
{
try
{
return ((TransactionI)tx).dbTxn();
}
catch(ClassCastException e)
{
return null;
}
}
/**
* Registers a handler for fatal errors encountered by the background save evictor.
*
* @param cb The error callback.
*/
public static synchronized FatalErrorCallback
registerFatalErrorCallback(FatalErrorCallback cb)
{
FatalErrorCallback result = _fatalErrorCallback;
_fatalErrorCallback = cb;
return result;
}
static synchronized void
handleFatalError(BackgroundSaveEvictor evictor, Ice.Communicator communicator, RuntimeException ex)
{
if(_fatalErrorCallback != null)
{
_fatalErrorCallback.handleError(evictor, communicator, ex);
}
else
{
communicator.getLogger().error("*** Halting JVM ***");
Runtime.getRuntime().halt(1);
}
}
private static String _catalogName = "__catalog";
private static String _catalogIndexListName = "__catalogIndexList";
private static FatalErrorCallback _fatalErrorCallback = null;
}
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