001/* 002 * (C) Copyright 2013 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Delbosc Benoit 016 */ 017package org.nuxeo.runtime.metrics; 018 019import org.apache.commons.logging.Log; 020import org.apache.commons.logging.LogFactory; 021import org.nuxeo.runtime.model.ComponentContext; 022import org.nuxeo.runtime.model.ComponentInstance; 023import org.nuxeo.runtime.model.DefaultComponent; 024 025import com.codahale.metrics.Counter; 026import com.codahale.metrics.MetricRegistry; 027import com.codahale.metrics.SharedMetricRegistries; 028 029public class MetricsServiceImpl extends DefaultComponent implements MetricsService { 030 031 protected static final Log log = LogFactory.getLog(MetricsServiceImpl.class); 032 033 protected MetricRegistry registry = SharedMetricRegistries.getOrCreate(MetricsService.class.getName()); 034 035 private final Counter instanceUp = registry.counter(MetricRegistry.name("nuxeo", "instance-up")); 036 037 protected static final String CONFIGURATION_EP = "configuration"; 038 039 public static MetricsDescriptor config; 040 041 public MetricsServiceImpl() { 042 super(); 043 } 044 045 @Override 046 public void registerContribution(Object contribution, String extensionPoint, ComponentInstance contributor) { 047 if (CONFIGURATION_EP.equals(extensionPoint) && contribution instanceof MetricsDescriptor) { 048 log.debug("Registering metrics contribution"); 049 config = (MetricsDescriptor) contribution; 050 } else { 051 log.warn("Unknown EP " + extensionPoint); 052 } 053 } 054 055 @Override 056 public void deactivate(ComponentContext context) { 057 try { 058 config.disable(registry); 059 } finally { 060 instanceUp.dec(); 061 } 062 log.debug("Deactivate component."); 063 } 064 065 @Override 066 public void applicationStarted(ComponentContext context) { 067 if (config == null) { 068 // Use a default config 069 config = new MetricsDescriptor(); 070 } 071 log.info("Setting up metrics configuration"); 072 config.enable(registry); 073 instanceUp.inc(); 074 } 075 076}