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.Histogram;
019import com.jfinal.aop.Interceptor;
020import com.jfinal.aop.Invocation;
021import io.jboot.Jboot;
022import io.jboot.support.metric.annotation.EnableMetricHistogram;
023import io.jboot.utils.AnnotationUtil;
024import io.jboot.utils.StrUtil;
025
026public class MetricHistogramInterceptor implements Interceptor {
027
028
029    @Override
030    public void intercept(Invocation inv) {
031
032        EnableMetricHistogram histogramAnnotation = inv.getMethod().getAnnotation(EnableMetricHistogram.class);
033        if (histogramAnnotation != null) {
034            String value = AnnotationUtil.get(histogramAnnotation.value());
035            String name = StrUtil.isBlank(value)
036                    ? inv.getController().getClass().getName() + "." + inv.getMethodName() + ".histogram"
037                    : value;
038
039
040            Histogram histogram = Jboot.getMetric().histogram(name);
041            histogram.update(histogramAnnotation.update());
042        }
043
044        inv.invoke();
045    }
046
047
048}