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1 | + | //http://jalarms.svn.sourceforge.net/viewvc/jalarms/maven-project/src/main/java/com/solab/alarms/AlarmMemcachedClient.java?revision=59&content-type=text/plain&pathrev=59 |
2 | ||
3 | /* | |
4 | jAlarms A simple Java library to enable server apps to send alarms to sysadmins. | |
5 | Copyright (C) 2009 Enrique Zamudio Lopez | |
6 | ||
7 | This library is free software; you can redistribute it and/or | |
8 | modify it under the terms of the GNU Lesser General Public | |
9 | License as published by the Free Software Foundation; either | |
10 | version 2.1 of the License, or (at your option) any later version. | |
11 | ||
12 | This library is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public | |
18 | License along with this library; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA | |
20 | */ | |
21 | ||
22 | package com.solab.alarms ; | |
23 | ||
24 | import java.io.IOException | |
25 | import java.net.InetSocketAddress ; | |
26 | import java.util.List ; | |
27 | ||
28 | import javax.annotation.PostConstruct ; | |
29 | import javax.annotation.PreDestroy ; | |
30 | ||
31 | import org.slf4j.Logger ; | |
32 | import org.slf4j.LoggerFactory ; | |
33 | ||
34 | import net.spy.memcached.MemcachedClient ; | |
35 | import net.spy.memcached.OperationTimeoutException ; | |
36 | ||
37 | ||
38 | public class AlarmMemcachedClient implements AlarmCache { | |
39 | ||
40 | private final Logger log = LoggerFactory.getLogger(getClass()) ; | |
41 | private MemcachedClient mc ; | |
42 | private InetSocketAddress[] servers ; | |
43 | private int defint = 120 ; | |
44 | ||
45 | public void setDefaultInterval(int value) { | |
46 | defint = value ; | |
47 | } | |
48 | public int getDefaultInterval() { | |
49 | return defint ;} | |
50 | ||
51 | public void setServers(List<String> value) { | |
52 | servers = new InetSocketAddress[value.size()] ; | |
53 | int pos = 0 ; | |
54 | for (String s : value) { | |
55 | int cp = value.indexOf(':') ; | |
56 | if (cp > 0) { | |
57 | servers[pos++] = new InetSocketAddress(s.substring(0, cp), | |
58 | Integer.parseInt(s.substring(cp + 1))) ;} | |
59 | else { | |
60 | servers[pos++] = new InetSocketAddress(s, 11211) ; | |
61 | }}} | |
62 | @PostConstruct | |
63 | public void init() throws IOException { | |
64 | mc = new MemcachedClient(servers) ; | |
65 | } | |
66 | @PreDestroy | |
67 | public void disconnect() { | |
68 | mc.shutdown() ; | |
69 | } | |
70 | @Override | |
71 | public void store(AlarmChannel channel, String source, String message) { | |
72 | if (mc == null) { | |
73 | synchronized (this) { | |
74 | if (mc == null) { | |
75 | try { | |
76 | init() ;} | |
77 | catch (IOException ex) { | |
78 | log.error("Initializing alarm memcached client", ex) ; | |
79 | return ; | |
80 | }}}}} | |
81 | @Override | |
82 | public boolean shouldResend(AlarmChannel channel, String source, String message) { | |
83 | if (mc == null) { | |
84 | return true ;} | |
85 | try { | |
86 | return mc.get(k) == null ;} | |
87 | catch (OperationTimeoutException ex) { | |
88 | log.error("Timeout waiting to retrieve {} from memcached", k, ex) ;} | |
89 | catch (RuntimeException ex) { | |
90 | log.error("Retrieving key {} from memcached", k, ex.getCause() == null ? ex : ex.getCause()) ;} | |
91 | return true ; | |
92 | } | |
93 | @Override | |
94 | public String toString() { | |
95 | return String.format("Memcached(%s)", mc == null ? "disconnected" : mc.getAvailableServers()) ; | |
96 | } | |
97 | @Override | |
98 | public void shutdown() { | |
99 | if (mc != null) { | |
100 | mc.shutdown() ;}}} |