| /* |
| * 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; |
| |
| /** |
| * ClientSessionSequencing is private to EclipseLink. |
| * It provides sequencing for ClientSession. |
| * It contains a reference to SequencingServer object owned by |
| * ClientSession's parent ServerSession. |
| * |
| * @see SequencingServer |
| * @see org.eclipse.persistence.sessions.server.ClientSession |
| * |
| */ |
| class ClientSessionSequencing implements Sequencing { |
| // ownerClientSession |
| protected ClientSession clientSession; |
| |
| // SequencingServer owned by clientSession's parent ServerSession |
| protected SequencingServer sequencingServer; |
| |
| /** |
| * INTERNAL: |
| * Takes a potential owner - ClientSession as an argument. |
| * This static method is called before an instance of this class is created. |
| * The goal is to verify whether the instance of ClientSessionSequencing should be created. |
| */ |
| public static boolean sequencingServerExists(ClientSession cs) { |
| return cs.getParent().getSequencingServer() != null; |
| } |
| |
| /** |
| * INTERNAL: |
| * Takes an owner - ClientSession as an argument. |
| */ |
| public ClientSessionSequencing(ClientSession clientSession) { |
| this.clientSession = clientSession; |
| sequencingServer = clientSession.getParent().getSequencingServer(); |
| } |
| |
| /** |
| * INTERNAL: |
| * Simply calls the same method on SequencingServer |
| */ |
| @Override |
| public int whenShouldAcquireValueForAll() { |
| return sequencingServer.whenShouldAcquireValueForAll(); |
| } |
| |
| /** |
| * INTERNAL: |
| * This method is the reason for this class to exist: |
| * SequencingServer.getNextValue takes two arguments |
| * the first argument being a session which owns write connection |
| * (either DatabaseSession or ClientSession). |
| */ |
| @Override |
| public Object getNextValue(Class<?> cls) { |
| return sequencingServer.getNextValue(clientSession, cls); |
| } |
| } |