com.tradeshift.amqp.annotation.EnableRabbitRetryAndDlq Maven / Gradle / Ivy

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This library was created to make it easier to configure RabbitMQ within Spring and to establish a pattern for queues architecture.

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package com.tradeshift.amqp.annotation;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Exceptions checking order:
 *
 *  * - Should be discarded
 * - Should be sent to retry
 * - Should be sent to DLQ
 * - Otherwise discard
 * 
 *
 * The discardWhen attribute has higher precedence over exceptions attribute.
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface EnableRabbitRetryAndDlq {

    String event();

    /**
     * Define if the exception check should use 'instanceof' operator.
     */
    boolean checkInheritance() default true;

    /**
     * Exceptions to ignore and just discard the message.
     */
    Class[] discardWhen() default {};

    /**
     * Exceptions to verify if the message should be sent to retry.
     * If the number of retries is exceeded the message will be sent to DLQ.
     */
    Class[] retryWhen() default { Exception.class };

    /**
     * Exceptions to verify if the message should be sent to DLQ.
     */
    Class[] directToDlqWhen() default {};

}