1 /*
2 * EL4J, the Extension Library for the J2EE, adds incremental enhancements to
3 * the spring framework, http://el4j.sf.net
4 * Copyright (C) 2008 by ELCA Informatique SA, Av. de la Harpe 22-24,
5 * 1000 Lausanne, Switzerland, http://www.elca.ch
6 *
7 * EL4J is published under the GNU Lesser General Public License (LGPL)
8 * Version 2.1. See http://www.gnu.org/licenses/
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * For alternative licensing, please contact info@elca.ch
16 */
17 package ch.elca.el4j.services.monitoring;
18
19 import org.slf4j.Logger;
20 import org.slf4j.LoggerFactory;
21
22 import com.jamonapi.Monitor;
23 import com.jamonapi.MonitorFactory;
24
25 /**
26 * A simple DB-Logger that counts the number of DB roundtrips (single-threaded, i.e. roundtrips are not associated with
27 * executing thread). It is a minimalistic wrapper for {@link MonitorFactory},
28 * so use JAMons MonitorFactory directly if you need more control.
29 *
30 * @svnLink $Revision: 3874 $;$Date: 2009-08-04 14:25:40 +0200 (Di, 04. Aug 2009) $;$Author: swismer $;$URL: https://el4j.svn.sourceforge.net/svnroot/el4j/branches/el4j_3_1/el4j/framework/modules/database/jamon/src/main/java/ch/elca/el4j/services/monitoring/DbLogger.java $
31 *
32 * @author Stefan Wismer (SWI)
33 */
34 public final class DbLogger {
35 /**
36 * Private logger of this class.
37 */
38 private static Logger s_logger = LoggerFactory.getLogger(DbLogger.class);
39
40 /**
41 * The hidden constructor.
42 */
43 private DbLogger() { }
44
45 /**
46 * Start monitoring.
47 */
48 public static void enable() {
49 MonitorFactory.enable();
50 }
51
52 /**
53 * Stop monitoring.
54 */
55 public static void disable() {
56 MonitorFactory.disable();
57 }
58
59 /**
60 * @return the number of DB roundtrips detected since monitor has been activated
61 * (which is always done on startup) or last reset. If monitoring is not available <code>-1</code> is
62 * returned.
63 */
64 public static int getRoundtripCount() {
65 int roundtrips = 0;
66 if (MonitorFactory.getRootMonitor().getMonitors() != null) {
67 for (Monitor monitor : MonitorFactory.getRootMonitor().getMonitors()) {
68 // search for execution of (Prepared)Statements
69 if (monitor.getLabel().contains("Statement.execute")) {
70 roundtrips += monitor.getHits();
71 }
72 }
73 } else {
74 s_logger.warn("JAMon JDBC interceptor not found.");
75 roundtrips = -1;
76 }
77 return roundtrips;
78 }
79
80 /**
81 * Reset monitoring. All acquired values get lost.
82 */
83 public static void reset() {
84 MonitorFactory.reset();
85 }
86 }