org.ow2.cmi.ha.ReplicationManager Maven / Gradle / Ivy
/**
* High Availability Service (HA) for JOnAS
*
* Copyright (C) 2006 Distributed Systems Lab.
* Universidad Politecnica de Madrid (Spain)
* Contact: http://lsd.ls.fi.upm.es/lsd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY 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 along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* --------------------------------------------------------------------------
* $Id: ReplicationManager.java 2438 2010-02-24 16:20:30Z benoitf $
* --------------------------------------------------------------------------
*/
package org.ow2.cmi.ha;
import org.ow2.cmi.ha.SessionId;
/**
* Interface with the replication functionality.
* @author Francisco Perez-Sorrosal (fpsorrosal@[email protected])
* @author Alberto Paz-Jimenez (apaz@[email protected])
*/
public interface ReplicationManager {
// Primary methods
/**
* Correlates the changes made on a modified bean with a concrete client request.
* @param reqId the request id from the client
* @param bid the unique identifier for the instance
* @param bean the bean reference
*/
void addModifiedBean(RequestId reqId, SessionId bid, StatefulBeanReference bean);
/**
* Correlates the changes made on a modified bean with a concrete client request.
* @param reqId the request id from the client
* @param bean the bean reference
*/
void addEntityBean(RequestId reqId, EntityBeanReference bean);
/**
* Associate a response with a requestId.
* @param reqId the request id
* @param response the response
*/
void addResponse(RequestId reqId, Object response);
/**
* Replicates the changes made on beans inside a concrete request context.
* @param reqId the request id
* @throws ReplicationException
*/
void replicate(RequestId reqId) throws ReplicationException;
/**
* Replicates the commit/abort message associate with a request.
* @param reqId the request id
* @param committed true if the transaction has committed
* @throws ReplicationException
*/
void replicateCommit(RequestId reqId, boolean committed) throws ReplicationException;
// Backup Methods
/**
* Returns true if the request id have an associated response, false in other case.
* @param reqId the request id
* @return true if the request id have an associated response, false in other case
*/
boolean hasBackupResponse(RequestId reqId);
/**
* Returns the response associated with the request id.
* Returns null if there is not response associated
* @param reqId
* @return the associated response
*/
Object getBackupResponse(RequestId reqId);
/**
* Restores the state for a bean through its remote interface. This will
* probably made on a backup server when it has been selected to be the new
* primary.
* @param clusterOID the cluster object id
* @param bean the sfsw that contains the instance where restore the state
*/
void restoreBeanChanges(SessionId clusterOID, StatefulBeanReference bean);
/**
* Processes a message data.
* @param data the message data
*/
void processMessage(HaMessageData data);
/**
* Clears/removes the elements used by the concrete implementation.
*/
void clear();
}