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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() ;}}} |
