| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| TransactionedSerial |
|
| 1.0;1 |
| 1 | /* | |
| 2 | * $Source$ | |
| 3 | * $Revision$ | |
| 4 | * | |
| 5 | * Copyright (C) 2000 William Chesters | |
| 6 | * | |
| 7 | * Part of Melati (http://melati.org), a framework for the rapid | |
| 8 | * development of clean, maintainable web applications. | |
| 9 | * | |
| 10 | * Melati is free software; Permission is granted to copy, distribute | |
| 11 | * and/or modify this software under the terms either: | |
| 12 | * | |
| 13 | * a) the GNU General Public License as published by the Free Software | |
| 14 | * Foundation; either version 2 of the License, or (at your option) | |
| 15 | * any later version, | |
| 16 | * | |
| 17 | * or | |
| 18 | * | |
| 19 | * b) any version of the Melati Software License, as published | |
| 20 | * at http://melati.org | |
| 21 | * | |
| 22 | * You should have received a copy of the GNU General Public License and | |
| 23 | * the Melati Software License along with this program; | |
| 24 | * if not, write to the Free Software Foundation, Inc., | |
| 25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the | |
| 26 | * GNU General Public License and visit http://melati.org to obtain the | |
| 27 | * Melati Software License. | |
| 28 | * | |
| 29 | * Feel free to contact the Developers of Melati (http://melati.org), | |
| 30 | * if you would like to work out a different arrangement than the options | |
| 31 | * outlined here. It is our intention to allow Melati to be used by as | |
| 32 | * wide an audience as possible. | |
| 33 | * | |
| 34 | * This program is distributed in the hope that it will be useful, | |
| 35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 37 | * GNU General Public License for more details. | |
| 38 | * | |
| 39 | * Contact details for copyright holder: | |
| 40 | * | |
| 41 | * William Chesters <williamc At paneris.org> | |
| 42 | * http://paneris.org/~williamc | |
| 43 | * Obrechtstraat 114, 2517VX Den Haag, The Netherlands | |
| 44 | */ | |
| 45 | ||
| 46 | package org.melati.poem.transaction; | |
| 47 | ||
| 48 | /** | |
| 49 | * A serial id of an object which is incremented each time | |
| 50 | * that object is loaded or locked. | |
| 51 | */ | |
| 52 | public class TransactionedSerial extends Transactioned { | |
| 53 | ||
| 54 | 932 | private long serial = 0L; |
| 55 | ||
| 56 | /** | |
| 57 | * Constructor. | |
| 58 | * @param transactionPool the TransactionPool this is relevant to | |
| 59 | */ | |
| 60 | public TransactionedSerial(TransactionPool transactionPool) { | |
| 61 | 932 | super(transactionPool); |
| 62 | 932 | } |
| 63 | ||
| 64 | /** | |
| 65 | * On load increment the Serial for this object. | |
| 66 | * | |
| 67 | * {@inheritDoc} | |
| 68 | * @see org.melati.poem.transaction.Transactioned#load(org.melati.poem.transaction.Transaction) | |
| 69 | */ | |
| 70 | protected void load(Transaction transaction) { | |
| 71 | 170 | ++serial; |
| 72 | 170 | } |
| 73 | ||
| 74 | /** | |
| 75 | * Return the inheritted validity flag. | |
| 76 | * | |
| 77 | * {@inheritDoc} | |
| 78 | * @see org.melati.poem.transaction.Transactioned#upToDate(org.melati.poem.transaction.Transaction) | |
| 79 | */ | |
| 80 | protected boolean upToDate(Transaction transaction) { | |
| 81 | 170 | return valid; |
| 82 | } | |
| 83 | ||
| 84 | /** | |
| 85 | * This implementation does nothing. | |
| 86 | * | |
| 87 | * {@inheritDoc} | |
| 88 | * @see org.melati.poem.transaction.Transactioned#writeDown(org.melati.poem.transaction.Transaction) | |
| 89 | */ | |
| 90 | protected void writeDown(Transaction transaction) { | |
| 91 | 6533 | } |
| 92 | ||
| 93 | // | |
| 94 | // --------------------- | |
| 95 | // TransactionedSerial | |
| 96 | // --------------------- | |
| 97 | // | |
| 98 | ||
| 99 | /** | |
| 100 | * Readlock and return the serial for the given Transaction. | |
| 101 | * @param transaction the Transaction | |
| 102 | * @return the serial for the given Transaction | |
| 103 | */ | |
| 104 | public long current(Transaction transaction) { | |
| 105 | 198 | readLock(transaction); |
| 106 | 198 | return serial; |
| 107 | } | |
| 108 | ||
| 109 | /** | |
| 110 | * Write lock and increment. | |
| 111 | * @param transaction the Transaction | |
| 112 | */ | |
| 113 | public void increment(Transaction transaction) { | |
| 114 | 7463 | writeLock(transaction); |
| 115 | 7463 | increment_unlocked(); |
| 116 | 7463 | } |
| 117 | ||
| 118 | /** | |
| 119 | * Increment. | |
| 120 | */ | |
| 121 | public void increment_unlocked() { | |
| 122 | 7463 | ++serial; |
| 123 | 7463 | } |
| 124 | } |