/*
 * Copyright 2008-2026 Async-IO.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.atmosphere.config;

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

/**
 * This annotation is scanned by Atmosphere at runtime to determine {@link org.atmosphere.annotation.Processor} implementation.
 * Application that wants to define their own annotation can annotate their class with this annotation.
 *
 * @author Jeanfrancois Arcand
 */
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface AtmosphereAnnotation {
    /**
     * Return the handled annotation associated with the {@link org.atmosphere.annotation.Processor}
     */
    Class<? extends Annotation> value();

    /**
     * Processing priority. Processors with lower priority run first during
     * annotation scanning. Processors with priority &gt; 0 are deferred until
     * all default-priority (0) processors complete, then executed in order.
     *
     * <p>This ensures dependencies between processors are respected. For example,
     * a coordinator processor (priority 100) runs after agent processors
     * (priority 0) so that agent endpoints are registered before the
     * coordinator resolves its fleet.</p>
     *
     * @return the priority, default 0 (immediate processing)
     */
    int priority() default 0;
}
