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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2018-2021] 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.
*
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* 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
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package fish.payara.microprofile.opentracing.cdi;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.LinkedList;
import java.util.Objects;
import java.util.Optional;
import java.util.Queue;
import java.util.Set;
import java.util.function.Function;
import java.util.logging.Level;
import java.util.logging.Logger;
import jakarta.enterprise.inject.spi.BeanManager;
import jakarta.interceptor.InvocationContext;
import jakarta.ws.rs.container.ResourceInfo;
import org.eclipse.microprofile.config.Config;
import org.eclipse.microprofile.config.ConfigProvider;
import org.jboss.weld.interceptor.WeldInvocationContext;
import static java.util.Arrays.asList;
import static java.util.logging.Level.FINE;
import static java.util.logging.Level.FINER;
import static java.util.logging.Level.FINEST;
/**
* Utilities class for various CDI-based operations used by the OpenTracing Service classes.
*
* @author Andrew Pielage
* @author Arjan Tijms
*/
public class OpenTracingCdiUtils {
private static final Logger LOG = Logger.getLogger(OpenTracingCdiUtils.class.getName());
/**
* Gets the annotation from the method that triggered the interceptor.
*
* @param The annotation type to return
* @param beanManager The invoking interceptor's BeanManager
* @param annotationClass The class of the annotation to get
* @param invocationContext The context of the method invocation
* @return The annotation that triggered the interceptor.
*/
public static A getAnnotation(BeanManager beanManager, Class annotationClass, InvocationContext invocationContext) {
A annotation = getInterceptedAnnotation(annotationClass, invocationContext);
if (annotation == null) {
annotation = getAnnotation(beanManager, annotationClass, invocationContext.getMethod().getDeclaringClass(), invocationContext.getMethod());
}
return annotation;
}
/**
* Gets the annotation from the method that triggered the interceptor.
*
* @param The annotation type to return
* @param beanManager The invoking interceptor's BeanManager
* @param annotationClass The class of the annotation to get
* @param resourceInfo The targeted jaxrs resource
* @return The annotation that triggered the interceptor.
*/
public static A getAnnotation(BeanManager beanManager, Class annotationClass, ResourceInfo resourceInfo) {
return getAnnotation(
beanManager, annotationClass,
resourceInfo.getResourceClass(),
resourceInfo.getResourceMethod());
}
public static A getAnnotation(BeanManager beanManager, Class annotationClass, Class annotatedClass, Method method) {
logGetAnnotation(annotationClass, method);
Objects.requireNonNull(annotatedClass, "annotatedClass");
Objects.requireNonNull(method, "method");
// Try to get the annotation from the method, otherwise attempt to get it from the class
if (method.isAnnotationPresent(annotationClass)) {
LOG.log(FINER, "Annotation was directly present on the method");
return method.getAnnotation(annotationClass);
}
if (annotatedClass.isAnnotationPresent(annotationClass)) {
LOG.log(FINER, "Annotation was directly present on the class");
return annotatedClass.getAnnotation(annotationClass);
}
LOG.log(FINER, "Annotation wasn't directly present on the method or class, checking stereotypes");
// Account for Stereotypes
Queue annotations = new LinkedList<>(asList(annotatedClass.getAnnotations()));
A annotation = null;
// Loop over each individual annotation
while (!annotations.isEmpty()) {
Annotation a = annotations.remove();
// Check if this is the annotation we're looking for
if (a.annotationType().equals(annotationClass)) {
LOG.log(FINER, "Annotation was found in a stereotype");
annotation = annotationClass.cast(a);
break;
}
// If the found annotation is a stereotype, get the individual annotations and add them to the list
// to be iterated over
if (beanManager.isStereotype(a.annotationType())) {
annotations.addAll(beanManager.getStereotypeDefinition(a.annotationType()));
}
}
return annotation;
}
/**
* Gets overriding config parameter values if they're present from an invocation context.
*
* @param The annotation type
* @param annotationClass The annotation class
* @param parameterName The name of the parameter to get the override value of
* @param invocationContext The context of the invoking request
* @param parameterType The type of the parameter to get the override value of
* @return An Optional containing the override value from the config if there is one
*/
public static Optional getConfigOverrideValue(Class annotationClass, String parameterName, InvocationContext invocationContext, Class parameterType) {
return getConfigOverrideValue(annotationClass, parameterName, invocationContext.getMethod(), parameterType);
}
/**
* Gets overriding config parameter values if they're present from an invocation context.
*
* @param The annotation type
* @param annotationClass The annotation class
* @param parameterName The name of the parameter to get the override value of
* @param method The method to be invoked
* @param parameterType The type of the parameter to get the override value of
* @return An Optional containing the override value from the config if there is one
*/
public static Optional getConfigOverrideValue(Class annotationClass, String parameterName, Method method, Class parameterType) {
final Config config = getConfig();
if (config == null) {
LOG.log(FINE, "No config to get override parameters from.");
return Optional.empty();
}
// Get the annotation, method, and class names
final String annotationName = annotationClass.getSimpleName();
final String annotatedMethodName = method.getName();
final String annotatedClassCanonicalName = method.getDeclaringClass().getCanonicalName();
// Check if there's a config override for the method
LOG.log(FINER, "Getting config override for annotated method...");
final Optional methodValue = config.getOptionalValue( //
annotatedClassCanonicalName + "/" + annotatedMethodName + "/" + annotationName + "/" + parameterName, //
parameterType);
if (methodValue.isPresent()) {
return methodValue;
}
LOG.log(FINER, "No config override for annotated method, checking if the method is annotated directly...");
if (method.getAnnotation(annotationClass) != null) {
LOG.log(FINER, "Using method annotation.");
return methodValue; // it is empty here
}
// If there wasn't a config override for the method, check if there's one for the class
LOG.log(FINER, "No config override or annotated method, getting config override for the annotated class...");
final Optional classValue = config.getOptionalValue( //
annotatedClassCanonicalName + "/" + annotationName + "/" + parameterName, parameterType);
if (classValue.isPresent()) {
return classValue;
}
// If there wasn't a config override for the class either, check if there's a global one
LOG.log(FINER, "No config override for the annotated class, getting application wide config override...");
final Optional appValue = config.getOptionalValue(annotationName + "/" + parameterName, parameterType);
if (!appValue.isPresent()) {
LOG.log(FINER, "No config overrides");
}
return appValue;
}
/**
* Gets overriding config parameter values if they're present from an invocation context.
*
* @param The annotation type
* @param annotationClass The annotation class
* @param parameterName The name of the parameter to get the override value of
* @param resourceInfo The targeted jaxrs resource
* @param parameterType The type of the parameter to get the override value of
* @return An Optional containing the override value from the config if there is one
*/
public static Optional getConfigOverrideValue(Class annotationClass,
String parameterName, ResourceInfo resourceInfo, Class parameterType) {
final Config config = getConfig();
if (config == null) {
LOG.log(FINE, "No config to get override parameters from.");
return Optional.empty();
}
LOG.log(FINER, "Getting config override for annotated method...");
final String annotationName = annotationClass.getSimpleName();
final String annotatedMethodName = resourceInfo.getResourceMethod().getName();
final String annotatedClassCanonicalName = resourceInfo.getResourceClass().getCanonicalName();
final Optional methodValue = config.getOptionalValue( //
annotatedClassCanonicalName + "/" + annotatedMethodName + "/" + annotationName + "/" + parameterName,
parameterType);
if (methodValue.isPresent()) {
return methodValue;
}
LOG.log(FINEST, "No config override for annotated method, checking if the method is annotated directly...");
if (resourceInfo.getResourceMethod().getAnnotation(annotationClass) != null) {
LOG.log(FINER, "Using method annotation.");
return methodValue; // it is empty here
}
LOG.log(FINER, "No config override or annotated method, getting config override for the annotated class...");
final Optional classValue = config.getOptionalValue( //
annotatedClassCanonicalName + "/" + annotationName + "/" + parameterName, parameterType);
if (classValue.isPresent()) {
return classValue;
}
LOG.log(FINER, "No config override for the annotated class, getting application wide config override...");
final Optional appValue = config.getOptionalValue(annotationName + "/" + parameterName, parameterType);
if (!appValue.isPresent()) {
LOG.log(FINER, "No config overrides");
}
return appValue;
}
/**
* Uses Weld to find an annotation. The annotation must be an intercepted annotation that has a binding
* @param
* @param annotationClass {@link Annotation} to look for
* @param invocationContext
* @return the {@link Annotation} that the interceptor is inceptoring,or null if it cannot be found
*/
private static A getInterceptedAnnotation(Class annotationClass, InvocationContext invocationContext){
if (invocationContext instanceof WeldInvocationContext) {
Set interceptorBindings = ((WeldInvocationContext) invocationContext).getInterceptorBindings();
for (Annotation annotationBound : interceptorBindings) {
if (annotationBound.annotationType().equals(annotationClass)) {
return (A) annotationBound;
}
}
}
return null;
}
private static Config getConfig() {
try {
return ConfigProvider.getConfig();
} catch (IllegalArgumentException ex) {
LOG.log(Level.INFO, "No config could be found", ex);
}
return null;
}
private static void logGetAnnotation(Class annotatedClass, Method method) {
LOG.log(FINER, "Attempting to get annotation {0} from {1}",
new String[] {getString(annotatedClass, Class::getSimpleName), getString(method, Method::getName)});
}
private static String getString(final T object, Function toString) {
if (object == null) {
return null;
}
return toString.apply(object);
}
}