1 /*
2 * Copyright (c) 2002-2022, City of Paris
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice
10 * and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice
13 * and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * 3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 * License 1.0
33 */
34 package fr.paris.lutece.portal.service.mail;
35
36 import java.util.ArrayList;
37 import java.util.List;
38
39 import org.apache.commons.collections.CollectionUtils;
40
41 /**
42 * MemoryQueue
43 */
44 public class MemoryQueue implements IMailQueue
45 {
46 private List<MailItem> _listMails = new ArrayList<>( );
47
48 /**
49 * Put a mail item into the list of the queue
50 *
51 * @param item
52 * The mail item to add to the queue
53 */
54 public void send( MailItem item )
55 {
56 synchronized( _listMails )
57 {
58 _listMails.add( item );
59 }
60 }
61
62 /**
63 * Get a mail item from the list and remove it from the queue
64 *
65 * @return The older mail item of the queue
66 */
67 public MailItem consume( )
68 {
69 MailItem item = null;
70
71 synchronized( _listMails )
72 {
73 if ( CollectionUtils.isNotEmpty( _listMails ) )
74 {
75 item = _listMails.get( 0 );
76 _listMails.remove( 0 );
77 }
78 }
79
80 return item;
81 }
82
83 /**
84 * get the MemoryQueue size
85 *
86 * @return the MemoryQueue size
87 */
88 public int size( )
89 {
90 return _listMails.size( );
91 }
92 }