fish.payara.microprofile.metrics.cdi.extension.MetricCDIExtension Maven / Gradle / Ivy
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package fish.payara.microprofile.metrics.cdi.extension;
import fish.payara.microprofile.metrics.cdi.MetricsAnnotationBinding;
import fish.payara.microprofile.metrics.cdi.AnnotationReader;
import fish.payara.microprofile.metrics.cdi.interceptor.ConcurrentGaugeInterceptor;
import fish.payara.microprofile.metrics.cdi.interceptor.CountedInterceptor;
import fish.payara.microprofile.metrics.cdi.interceptor.MeteredInterceptor;
import fish.payara.microprofile.metrics.cdi.interceptor.MetricsInterceptor;
import fish.payara.microprofile.metrics.cdi.interceptor.SimplyTimedInterceptor;
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 java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Constructor;
import java.lang.reflect.Member;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.AnnotatedCallable;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.BeforeBeanDiscovery;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessAnnotatedType;
import javax.enterprise.inject.spi.WithAnnotations;
import javax.enterprise.util.AnnotationLiteral;
import javax.enterprise.util.Nonbinding;
import javax.interceptor.Interceptor;
import org.eclipse.microprofile.metrics.Metadata;
import org.eclipse.microprofile.metrics.MetricType;
import org.eclipse.microprofile.metrics.annotation.ConcurrentGauge;
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.SimplyTimed;
import org.eclipse.microprofile.metrics.annotation.Timed;
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<>();
void beforeBeanDiscovery(@Observes BeforeBeanDiscovery beforeBeanDiscovery, BeanManager manager) {
addNonbindingAnnotation(Counted.class, beforeBeanDiscovery);
addNonbindingAnnotation(ConcurrentGauge.class, beforeBeanDiscovery);
addNonbindingAnnotation(Metered.class, beforeBeanDiscovery);
addNonbindingAnnotation(Timed.class, beforeBeanDiscovery);
addNonbindingAnnotation(SimplyTimed.class, beforeBeanDiscovery);
addNonbindingAnnotation(Gauge.class, beforeBeanDiscovery);
//
addAnnotatedType(CountedInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(ConcurrentGaugeInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(MeteredInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(TimedInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(MetricsInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(SimplyTimedInterceptor.class, manager, beforeBeanDiscovery);
addAnnotatedType(MetricProducer.class, manager, beforeBeanDiscovery);
addAnnotatedType(MetricRegistryProducer.class, manager, beforeBeanDiscovery);
}
void metricsAnnotations(@Observes @WithAnnotations({ Counted.class, ConcurrentGauge.class, Gauge.class,
Metered.class, Timed.class, SimplyTimed.class }) ProcessAnnotatedType processAnnotatedType) {
processAnnotatedType.configureAnnotatedType().add(METRICS_ANNOTATION_BINDING);
}
void validateMetrics(@Observes @WithAnnotations({ Counted.class, ConcurrentGauge.class, Gauge.class,
Metered.class, Timed.class, SimplyTimed.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()) {
if (reader.type() != MetricType.INVALID) {
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();
E existingElement = annotatedElements.putIfAbsent(name, element);
Metadata existingMetadata = metadataMap.putIfAbsent(name, metadata);
if (null != existingElement && null != existingMetadata
&& metadata.getTypeRaw() != existingMetadata.getTypeRaw()) {
String errorMessage;
if (element instanceof Constructor) {
errorMessage = String.format("Duplicate metric name[%s] found on elements [%s#%s] and [%s#%s]",
name,
existingElement, existingMetadata.getType(),
element, metadata.getType()
);
} else {
errorMessage = String.format("Duplicate metric name[%s] found on elements [%s.%s#%s] and [%s.%s#%s]",
name,
existingElement.getDeclaringClass().getName(), existingElement.getName(), existingMetadata.getType(),
element.getDeclaringClass().getName(), element.getName(), metadata.getType()
);
}
validationMessages.add(errorMessage);
}
}
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());
}
}
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