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.rest; 020 021import javax.faces.event.PhaseEvent; 022import javax.faces.event.PhaseId; 023import javax.faces.event.PhaseListener; 024 025import org.apache.commons.logging.Log; 026import org.apache.commons.logging.LogFactory; 027 028/** 029 * Logs time rendering for each JSF phase. 030 * <p> 031 * WARN: this listener is shared by all threads -- to be used in a controlled environment. 032 * 033 * @since 8.2 034 */ 035public class JSFDebugPhaseListener implements PhaseListener { 036 037 private static final long serialVersionUID = 1L; 038 039 private static final Log log = LogFactory.getLog(JSFDebugPhaseListener.class); 040 041 protected long start; 042 043 @Override 044 public PhaseId getPhaseId() { 045 return PhaseId.ANY_PHASE; 046 } 047 048 @Override 049 public void beforePhase(PhaseEvent event) { 050 if (isEnabled()) { 051 start = System.currentTimeMillis(); 052 } 053 } 054 055 @Override 056 public void afterPhase(PhaseEvent event) { 057 if (isEnabled()) { 058 long end = System.currentTimeMillis(); 059 log.debug(event.getPhaseId() + ": " + (end - start) + " ms"); 060 } 061 } 062 063 protected static boolean isEnabled() { 064 return log.isDebugEnabled(); 065 } 066 067}