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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2018-2023] Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
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* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
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* file and include the License file at glassfish/legal/LICENSE.txt.
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* *****************************************************************************
* Copyright (c) 2013 Antonin Stefanutti ([email protected])
*
* Licensed under the Apache License, Version 2.0 (the "License");
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* http://www.apache.org/licenses/LICENSE-2.0
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package fish.payara.microprofile.metrics.cdi.extension;
import fish.payara.microprofile.metrics.MetricsService;
import fish.payara.microprofile.metrics.cdi.AnnotationReader;
import fish.payara.microprofile.metrics.cdi.MetricsAnnotationBinding;
import fish.payara.microprofile.metrics.cdi.interceptor.CountedInterceptor;
import fish.payara.microprofile.metrics.cdi.interceptor.MetricsInterceptor;
import fish.payara.microprofile.metrics.cdi.interceptor.TimedInterceptor;
import fish.payara.microprofile.metrics.cdi.producer.MetricProducer;
import fish.payara.microprofile.metrics.cdi.producer.MetricRegistryProducer;
import jakarta.enterprise.event.Observes;
import jakarta.enterprise.inject.spi.AfterBeanDiscovery;
import jakarta.enterprise.inject.spi.AnnotatedCallable;
import jakarta.enterprise.inject.spi.AnnotatedType;
import jakarta.enterprise.inject.spi.BeanManager;
import jakarta.enterprise.inject.spi.BeforeBeanDiscovery;
import jakarta.enterprise.inject.spi.Extension;
import jakarta.enterprise.inject.spi.ProcessAnnotatedType;
import jakarta.enterprise.inject.spi.WithAnnotations;
import jakarta.enterprise.util.AnnotationLiteral;
import jakarta.enterprise.util.Nonbinding;
import jakarta.interceptor.Interceptor;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Member;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.microprofile.metrics.Metadata;
import org.eclipse.microprofile.metrics.Tag;
import org.eclipse.microprofile.metrics.annotation.Counted;
import org.eclipse.microprofile.metrics.annotation.Gauge;
import org.eclipse.microprofile.metrics.annotation.Timed;
import org.glassfish.internal.api.Globals;
public class MetricCDIExtension implements Extension {
private static final AnnotationLiteral NON_BINDING = new AnnotationLiteral() {
};
private static final AnnotationLiteral METRICS_ANNOTATION_BINDING = new AnnotationLiteral() {
};
private final Map annotatedElements = new HashMap<>();
private final Map metadataMap = new HashMap<>();
private final List validationMessages = new ArrayList<>();
private MetricsService metricsService;
private MetricsService.MetricsContext metricsContext;
void beforeBeanDiscovery(@Observes BeforeBeanDiscovery beforeBeanDiscovery, BeanManager manager) {
addNonbindingAnnotation(Counted.class, beforeBeanDiscovery);
addNonbindingAnnotation(Timed.class, beforeBeanDiscovery);
addNonbindingAnnotation(Gauge.class, beforeBeanDiscovery);
addAnnotatedType(CountedInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(TimedInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(MetricsInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(MetricProducer.class, manager, beforeBeanDiscovery);
addAnnotatedType(MetricRegistryProducer.class, manager, beforeBeanDiscovery);
}
void metricsAnnotations(@Observes @WithAnnotations({ Counted.class, Gauge.class,
Timed.class}) ProcessAnnotatedType processAnnotatedType) {
processAnnotatedType.configureAnnotatedType().add(METRICS_ANNOTATION_BINDING);
}
void validateMetrics(@Observes @WithAnnotations({ Counted.class, Gauge.class,
Timed.class }) ProcessAnnotatedType processAnnotatedType) {
AnnotatedType annotatedType = processAnnotatedType.getAnnotatedType();
List> annotatedCallables = new ArrayList<>(annotatedType.getConstructors());
annotatedCallables.addAll(annotatedType.getMethods());
Class bean = annotatedType.getJavaClass();
for (AnnotatedCallable annotatedElement : annotatedCallables) {
if(!bean.isAnnotationPresent(Interceptor.class)) {
@SuppressWarnings("unchecked")
E element = (E) annotatedElement.getJavaMember();
validateAnnotated(element, bean);
}
}
}
private void validateAnnotated(E element, Class bean) {
for (AnnotationReader reader : AnnotationReader.readers()) {
validateAnnotated(element, bean, reader);
}
}
private void validateAnnotated(E element, Class bean, AnnotationReader reader) {
if (!reader.isPresent(bean, element)) {
return;
}
Metadata metadata = reader.metadata(bean, element);
String name = metadata.getName();
annotatedElements.putIfAbsent(name, element);
metadataMap.putIfAbsent(name, metadata);
initService();
if (reader.annotationType().getName().equals(Timed.class.getName()) &&
!MetricsInterceptor.isMethodPrivate(element)) {
String availableScope = reader.scope(reader.annotation(bean, element));
Tag[] tags = reader.tags(reader.annotation(bean, element));
metricsService.getContext(true).
getOrCreateRegistry((availableScope != null) ? availableScope : "application").timer(metadata, tags);
}
}
void validationError(@Observes AfterBeanDiscovery afterBeanDiscovery){
validationMessages.forEach(message -> afterBeanDiscovery.addDefinitionError(new IllegalStateException(message)));
annotatedElements.clear();
metadataMap.clear();
validationMessages.clear();
}
private static void addNonbindingAnnotation(Class annotation, BeforeBeanDiscovery beforeBeanDiscovery) {
beforeBeanDiscovery.configureInterceptorBinding(annotation)
.filterMethods(method -> !method.isAnnotationPresent(Nonbinding.class))
.forEach(method -> method.add(NON_BINDING));
}
private static void addAnnotatedType(Class type, BeanManager manager, BeforeBeanDiscovery beforeBeanDiscovery) {
beforeBeanDiscovery.addAnnotatedType(manager.createAnnotatedType(type), type.getName());
}
private void initService() {
if (metricsService == null) {
metricsService = Globals.getDefaultBaseServiceLocator().getService(MetricsService.class);
if (metricsService.isEnabled()) {
metricsContext = metricsService.getContext(true);
}
}
}
}