| /* |
| * Copyright (c) 1998, 2021 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Oracle - initial API and implementation from Oracle TopLink |
| package org.eclipse.persistence.internal.sequencing; |
| |
| import org.eclipse.persistence.sessions.server.ClientSession; |
| import org.eclipse.persistence.sessions.remote.DistributedSession; |
| import org.eclipse.persistence.internal.sessions.remote.RemoteConnection; |
| import org.eclipse.persistence.internal.sessions.AbstractSession; |
| import org.eclipse.persistence.internal.sessions.DatabaseSessionImpl; |
| import org.eclipse.persistence.sessions.broker.SessionBroker; |
| |
| /** |
| * SequencingFactory is private to EclipseLink. |
| * It instantiates sequencing classes for sessions. |
| * It allows sequencing classes to be encapsulated in |
| * this package. |
| * |
| * @see ClientSessionSequencing |
| * @see RemoteConnectionSequencing |
| * @see SessionBrokerSequencing |
| * @see SequencingManager |
| * |
| */ |
| public class SequencingFactory { |
| |
| private SequencingFactory() { |
| // no instance please |
| } |
| |
| /** |
| * INTERNAL: |
| * Takes a potential owner - a Session, returns Sequencing object. |
| * Note that before creating a Sequencing object there is a check performed |
| * to determine whether the object could be created. |
| */ |
| public static Sequencing createSequencing(AbstractSession session) { |
| Sequencing sequencing = null; |
| if (session.isClientSession()) { |
| ClientSession cs = (ClientSession)session; |
| if (ClientSessionSequencing.sequencingServerExists(cs)) { |
| sequencing = new ClientSessionSequencing(cs); |
| } |
| } else if (session.isRemoteSession()) { |
| RemoteConnection con = ((DistributedSession)session).getRemoteConnection(); |
| if (RemoteConnectionSequencing.masterSequencingExists(con)) { |
| sequencing = new RemoteConnectionSequencing(con); |
| } |
| } else if (session.isBroker()) { |
| SessionBroker br = (SessionBroker)session; |
| if (SessionBrokerSequencing.atLeastOneSessionHasSequencing(br)) { |
| sequencing = new SessionBrokerSequencing(br); |
| } |
| } |
| return sequencing; |
| } |
| |
| /** |
| * INTERNAL: |
| * Takes a potential owner - a DatabaseSession, returns SequencingHome object. |
| * Only DatabaseSession and ServerSession should be passed (not SessionBroker). |
| */ |
| public static SequencingHome createSequencingHome(DatabaseSessionImpl ownerSession) { |
| SequencingHome home = null; |
| if (!ownerSession.isBroker()) { |
| home = new SequencingManager(ownerSession); |
| } |
| return home; |
| } |
| } |