001/* 002 * (C) Copyright 2016 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Anahide Tchertchian 018 */ 019package org.nuxeo.ecm.platform.ui.web.util; 020 021import javax.faces.view.facelets.Tag; 022 023import org.apache.commons.logging.Log; 024import org.apache.commons.logging.LogFactory; 025import org.nuxeo.runtime.api.Framework; 026import org.nuxeo.runtime.services.config.ConfigurationService; 027 028/** 029 * @since 8.2 030 */ 031public class FaceletDebugTracer { 032 033 private static final Log log = LogFactory.getLog(FaceletDebugTracer.class); 034 035 public static final String TRACE_PROP = "nuxeo.jsf.debug.log_min_duration_ms"; 036 037 public static long start() { 038 if (getMaxTraceLag() >= 0) { 039 return System.currentTimeMillis(); 040 } 041 return 0; 042 } 043 044 public static void trace(long start, Tag tag, String id) { 045 if (start > 0) { 046 trace(start, tag, id, getMaxTraceLag()); 047 } 048 } 049 050 public static void traceMillis(long start, Tag tag, String id) { 051 trace(start, tag, id, 0); 052 } 053 054 public static void trace(long start, Tag tag, String id, long maxLag) { 055 if (start > 0 && maxLag >= 0) { 056 long end = System.currentTimeMillis(); 057 long lag = end - start; 058 if (lag >= maxLag) { 059 log.debug(String.format("'%s' at '%s' took: %s ms.", id, tag, lag)); 060 } 061 } 062 } 063 064 protected static long getMaxTraceLag() { 065 if (log.isDebugEnabled()) { 066 ConfigurationService cs = Framework.getService(ConfigurationService.class); 067 return Long.valueOf(cs.getProperty(TRACE_PROP, "-1")); 068 } 069 return -1; 070 } 071 072}