001/**
002 * Copyright (c) 2015-2022, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
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 * <p>
008 * http://www.apache.org/licenses/LICENSE-2.0
009 * <p>
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 */
016package io.jboot.support.metric.interceptor;
017
018import com.codahale.metrics.Counter;
019import com.jfinal.aop.Interceptor;
020import com.jfinal.aop.Invocation;
021import io.jboot.Jboot;
022import io.jboot.support.metric.annotation.EnableMetricConcurrency;
023import io.jboot.utils.AnnotationUtil;
024import io.jboot.utils.StrUtil;
025
026public class MetricConcurrencyInterceptor implements Interceptor {
027
028
029    @Override
030    public void intercept(Invocation inv) {
031
032        Counter concurrencyRecord = null;
033        EnableMetricConcurrency concurrencyAnnotation = inv.getMethod().getAnnotation(EnableMetricConcurrency.class);
034        if (concurrencyAnnotation != null) {
035            String value = AnnotationUtil.get(concurrencyAnnotation.value());
036            String name = StrUtil.isBlank(value)
037                    ? inv.getController().getClass().getName() + "." + inv.getMethodName() + ".concurrency"
038                    : value;
039
040
041            concurrencyRecord = Jboot.getMetric().counter(name);
042            concurrencyRecord.inc();
043        }
044
045        try {
046            inv.invoke();
047        } finally {
048            if (concurrencyRecord != null) {
049                concurrencyRecord.dec();
050            }
051        }
052    }
053
054
055}