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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2018] Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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*
* *****************************************************************************
* Copyright (c) 2013 Antonin Stefanutti ([email protected])
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
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package fish.payara.microprofile.metrics.cdi.interceptor;
import fish.payara.microprofile.metrics.MetricsService;
import fish.payara.microprofile.metrics.cdi.MetricsAnnotationBinding;
import fish.payara.microprofile.metrics.cdi.MetricsResolver;
import fish.payara.microprofile.metrics.impl.GaugeImpl;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import javax.annotation.Priority;
import javax.enterprise.inject.Intercepted;
import javax.enterprise.inject.spi.Bean;
import javax.inject.Inject;
import javax.interceptor.AroundConstruct;
import javax.interceptor.Interceptor;
import javax.interceptor.InvocationContext;
import org.eclipse.microprofile.metrics.MetricRegistry;
import org.eclipse.microprofile.metrics.annotation.Counted;
import org.eclipse.microprofile.metrics.annotation.Gauge;
import org.eclipse.microprofile.metrics.annotation.Metered;
import org.eclipse.microprofile.metrics.annotation.Timed;
import org.glassfish.internal.api.Globals;
@Interceptor
@MetricsAnnotationBinding
@Priority(Interceptor.Priority.LIBRARY_BEFORE)
public class MetricsInterceptor {
private MetricRegistry registry;
private MetricsResolver resolver;
private Bean bean;
@Inject
private MetricsInterceptor(MetricRegistry registry, MetricsResolver resolver, @Intercepted Bean bean) {
this.registry = registry;
this.resolver = resolver;
this.bean = bean;
}
@AroundConstruct
private Object constructorInvocation(InvocationContext context) throws Exception {
Object target;
MetricsService metricsService = Globals.getDefaultBaseServiceLocator().getService(MetricsService.class);
if (metricsService.isMetricEnabled()) {
Class beanClass = bean.getBeanClass();
registerMetrics(beanClass, context.getConstructor(), context.getTarget());
target = context.proceed();
Class type = beanClass;
do {
for (Method method : type.getDeclaredMethods()) {
if (!method.isSynthetic() && !Modifier.isPrivate(method.getModifiers())) {
registerMetrics(beanClass, method, context.getTarget());
}
}
type = type.getSuperclass();
} while (!Object.class.equals(type));
} else {
target = context.proceed();
}
return target;
}
private void registerMetrics(Class bean, E element, Object target) {
MetricsResolver.Of counted = resolver.counted(bean, element);
if (counted.isPresent()) {
registry.counter(counted.metadata());
}
MetricsResolver.Of metered = resolver.metered(bean, element);
if (metered.isPresent()) {
registry.meter(metered.metadata());
}
MetricsResolver.Of timed = resolver.timed(bean, element);
if (timed.isPresent()) {
registry.timer(timed.metadata());
}
if (element instanceof Method
&& element.isAnnotationPresent(org.eclipse.microprofile.metrics.annotation.Gauge.class)) {
MetricsResolver.Of gauge = resolver.gauge(bean, (Method) element);
if (gauge.isPresent()) {
registry.register(gauge.metricName(), new GaugeImpl((Method) element, target), gauge.metadata());
}
}
}
}