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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 *    Copyright (c) [2017] 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
 *     obtain a copy of the License at
 *     https://github.com/payara/Payara/blob/master/LICENSE.txt
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 * 
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 *     exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 *     file that accompanied this code.
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package fish.payara.microprofile.faulttolerance.validators;

import fish.payara.microprofile.faulttolerance.cdi.FaultToleranceCdiUtils;
import javax.enterprise.inject.spi.AnnotatedMethod;
import org.eclipse.microprofile.config.Config;
import org.eclipse.microprofile.faulttolerance.Bulkhead;
import org.eclipse.microprofile.faulttolerance.exceptions.FaultToleranceDefinitionException;

/**
 * Validator for the Fault Tolerance Bulkhead annotation.
 * @author Andrew Pielage
 */
public class BulkheadValidator {

    /**
     * Validates the given Bulkhead annotation.
     * @param bulkhead The annotation to validate
     * @param annotatedMethod The annotated method to validate
     * @param config The config to get any override values from
     */
    public static void validateAnnotation(Bulkhead bulkhead, AnnotatedMethod annotatedMethod, Config config) {
        int value = (Integer) FaultToleranceCdiUtils.getOverrideValue(
                config, Bulkhead.class, "value", annotatedMethod.getJavaMember().getName(),
                annotatedMethod.getJavaMember().getDeclaringClass().getCanonicalName(), Integer.class)
                .orElse(bulkhead.value());
        int waitingTaskQueue = (Integer) FaultToleranceCdiUtils.getOverrideValue(
                config, Bulkhead.class, "waitingTaskQueue", annotatedMethod.getJavaMember().getName(),
                annotatedMethod.getJavaMember().getDeclaringClass().getCanonicalName(), Integer.class)
                .orElse(bulkhead.waitingTaskQueue());

        if (value < 1) {
            throw new FaultToleranceDefinitionException("Method \"" + annotatedMethod.getJavaMember().getName() + "\""
                    + " annotated with " + Bulkhead.class.getCanonicalName() 
                    + " has a value less than 1: " + value);
        }

        if (waitingTaskQueue < 0) {
            throw new FaultToleranceDefinitionException("Method \"" + annotatedMethod.getJavaMember().getName() + "\""
                    + " annotated with " + Bulkhead.class.getCanonicalName() 
                    + " has a waitingTaskQueue value less than 0: " + waitingTaskQueue);
        }
    }
}