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Micro Distribution of the Payara Project
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2019-2020 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
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package fish.payara.microprofile.faulttolerance;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.time.temporal.ChronoUnit;
import org.eclipse.microprofile.faulttolerance.Asynchronous;
import org.eclipse.microprofile.faulttolerance.Bulkhead;
import org.eclipse.microprofile.faulttolerance.CircuitBreaker;
import org.eclipse.microprofile.faulttolerance.Fallback;
import org.eclipse.microprofile.faulttolerance.FallbackHandler;
import org.eclipse.microprofile.faulttolerance.Retry;
import org.eclipse.microprofile.faulttolerance.Timeout;
/**
* Encapsulates all properties extracted from FT annotations and the {@link org.eclipse.microprofile.config.Config} so
* that the processing can be declared independent of the actual resolution mechanism.
*
* A configuration is bound to a specific invocation context which is not an argument to each of the provided methods
* but passed to the implementation upon construction. For another invocation another configuration instance is bound.
*
* @author Jan Bernitt
*/
@FunctionalInterface
public interface FaultToleranceConfig {
/**
* A payara specific feature that allows to specify a list of annotation classes that have a similar effect as
* {@link Asynchronous}.
*/
String ALTERNATIVE_ASYNCHRONOUS_ANNNOTATIONS_PROPERTY = "MP_Fault_Tolerance_Alternative_Asynchronous_Annotations";
@SuppressWarnings("unchecked")
Class[] NO_ALTERNATIVE_ANNOTATIONS = new Class[0];
/**
* @return A {@link FaultToleranceConfig} that behaves as stated by the present FT annotations. {@link Method}
* annotations take precedence over the {@link Class} level annotations.
*/
static FaultToleranceConfig asAnnotated(Class target, Method method) {
return new FaultToleranceConfig() {
@Override
public A getAnnotation(Class annotationType) {
A annotation = method.getAnnotation(annotationType);
return annotation != null ? annotation : target.getAnnotation(annotationType);
}
};
}
/**
* Returns the value of the given annotation type for the invocation context was bound to upon construction.
*
* @param annotationType type to lookup
* @return the annotation of the given type if present or {@code null} otherwise
*/
A getAnnotation(Class annotationType);
/*
* General
*/
/**
* Check global generic annotation switch.
*
* @return true if (in addition to {@link Fallback}, which is always enabled) the other FT annotations are as well
* (default). Mostly used to disable these which will not disable {@link Fallback}.
*/
default boolean isNonFallbackEnabled() {
return true;
}
/**
* Check global annotation specific annotation switch.
*
* @param annotationType the annotation type to check
* @return true if the given annotation type is globally enabled, false if it is globally disabled
*/
default boolean isEnabled(Class annotationType) {
return true;
}
/**
* Check for global metrics switch.
*
* @return true if metrics are enabled, false otherwise.
*/
default boolean isMetricsEnabled() {
return true;
}
/**
* @see #getAnnotation(Class)
*/
default boolean isAnnotationPresent(Class annotationType) {
return getAnnotation(annotationType) != null;
}
default boolean isAlternativeAsynchronousAnnoationPresent() {
return false;
}
/*
* @Retry
*/
default int maxRetries(Retry annotation) {
return annotation.maxRetries();
}
default long delay(Retry annotation) {
return annotation.delay();
}
default ChronoUnit delayUnit(Retry annotation) {
return annotation.delayUnit();
}
default long maxDuration(Retry annotation) {
return annotation.maxDuration();
}
default ChronoUnit durationUnit(Retry annotation) {
return annotation.durationUnit();
}
default long jitter(Retry annotation) {
return annotation.jitter();
}
default ChronoUnit jitterDelayUnit(Retry annotation) {
return annotation.jitterDelayUnit();
}
default Class[] retryOn(Retry annotation) {
return annotation.retryOn();
}
default Class[] abortOn(Retry annotation) {
return annotation.abortOn();
}
/*
* @CircuitBreaker
*/
default Class[] failOn(CircuitBreaker annotation) {
return annotation.failOn();
}
default Class[] skipOn(CircuitBreaker annotation) {
return annotation.skipOn();
}
default long delay(CircuitBreaker annotation) {
return annotation.delay();
}
default ChronoUnit delayUnit(CircuitBreaker annotation) {
return annotation.delayUnit();
}
default int requestVolumeThreshold(CircuitBreaker annotation) {
return annotation.requestVolumeThreshold();
}
default double failureRatio(CircuitBreaker annotation) {
return annotation.failureRatio();
}
default int successThreshold(CircuitBreaker annotation) {
return annotation.successThreshold();
}
/*
* @Bulkhead
*/
default int value(Bulkhead annotation) {
return annotation.value();
}
default int waitingTaskQueue(Bulkhead annotation) {
return annotation.waitingTaskQueue();
}
/*
* @Timeout
*/
default long value(Timeout annotation) {
return annotation.value();
}
default ChronoUnit unit(Timeout annotation) {
return annotation.unit();
}
/*
* @Fallback
*/
default Class> value(Fallback annotation) {
return annotation.value();
}
default String fallbackMethod(Fallback annotation) {
return annotation.fallbackMethod();
}
default Class[] applyOn(Fallback annotation) {
return annotation.applyOn();
}
default Class[] skipOn(Fallback annotation) {
return annotation.skipOn();
}
}