001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.metrics.aspects.session; 018 019import org.apache.wicket.metrics.WicketMetrics; 020import org.aspectj.lang.ProceedingJoinPoint; 021import org.aspectj.lang.annotation.Around; 022import org.aspectj.lang.annotation.Aspect; 023 024/** 025 * The Session count listener aspect measures how many sessions are active 026 * 027 * @author Tobias Soloschenko 028 * 029 */ 030@Aspect 031public class SessionCountListenerAspect extends WicketMetrics 032{ 033 034 /** 035 * Measures if a session is going to be activated 036 * 037 * @param joinPoint 038 * the join point 039 * @return void 040 * @throws Throwable 041 * if an error occurred 042 */ 043 @Around("execution(* org.apache.wicket.metrics.aspects.session.SessionCountListener.inc(..))") 044 public Object aroundInc(ProceedingJoinPoint joinPoint) throws Throwable 045 { 046 Object count = joinPoint.proceed(); 047 count("core/session/count", null, CounterOperation.INC, 1L); 048 return count; 049 } 050 051 /** 052 * Measures if a session is going to be destroyed 053 * 054 * @param joinPoint 055 * the join point 056 * @return void 057 * @throws Throwable 058 * if an error occurred 059 */ 060 @Around("execution(* org.apache.wicket.metrics.aspects.session.SessionCountListener.dec(..))") 061 public Object aroundDec(ProceedingJoinPoint joinPoint) throws Throwable 062 { 063 Object count = joinPoint.proceed(); 064 count("core/session/count", null, CounterOperation.DEC, 1L); 065 return count; 066 } 067 068}