| /* |
| * 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 java.util.Hashtable; |
| |
| import org.eclipse.persistence.internal.sessions.remote.RemoteConnection; |
| import org.eclipse.persistence.internal.sessions.remote.RemoteFunctionCall; |
| import org.eclipse.persistence.internal.sessions.remote.SequencingFunctionCall; |
| |
| /* |
| * RemoteConnectionSequencing class provides Sequencing through RemoteConnection. |
| * It caches some info and communicates with Sequencing object |
| * on its master session by sending SequencingFunctionCall objects |
| * through the RemoteConnection. |
| * Note that individual SequencingFunctionCalls |
| * are implemented as static inner classes in SequenceFunctionCall class: |
| * like SequencingFunctionCall.DoesExist. |
| */ |
| @SuppressWarnings({"rawtypes"}) |
| class RemoteConnectionSequencing implements Sequencing { |
| protected RemoteConnection remoteConnection; |
| protected Hashtable classToShouldAcquireValueAfterInsert; |
| protected int whenShouldAcquireValueForAll; |
| |
| public static boolean masterSequencingExists(RemoteConnection con) { |
| return (Boolean) con.getSequenceNumberNamed(new SequencingFunctionCall.DoesExist()); |
| } |
| |
| public RemoteConnectionSequencing(RemoteConnection remoteConnection) { |
| this.remoteConnection = remoteConnection; |
| whenShouldAcquireValueForAll = (Integer) processFunctionCall(new SequencingFunctionCall.WhenShouldAcquireValueForAll()); |
| if (whenShouldAcquireValueForAll == UNDEFINED) { |
| classToShouldAcquireValueAfterInsert = new Hashtable(20); |
| } |
| } |
| |
| @Override |
| public int whenShouldAcquireValueForAll() { |
| return whenShouldAcquireValueForAll; |
| } |
| |
| @Override |
| public Object getNextValue(Class<?> cls) { |
| return processFunctionCall(new SequencingFunctionCall.GetNextValue(cls)); |
| } |
| |
| protected Object processFunctionCall(RemoteFunctionCall call) { |
| return remoteConnection.getSequenceNumberNamed(call); |
| } |
| } |