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Concepts of the layered architecture style.

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/*
 * Copyright 2020 the original author or authors.
 *
 * 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.jmolecules.architecture.layered;

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

/**
 * Identifies the {@link ApplicationLayer} in a layered architecture. The application layer is coordinating the
 * execution of business flows without containing business rules, but by utilizing the {@link DomainLayer}. It also
 * coordinates flows spanning other systems or bounded contexts and may keep information of the progress of the
 * execution.
 * 
 * Therefore, the application layer is a thin layer to enable the system to execute business flows.
 *
 * @author Christian Stettler
 * @author Henning Schwentner
 * @author Stephan Pirnbaum
 * @author Martin Schimak
 * @author Oliver Drotbohm
 * @see Domain-Driven Design
 *      Reference (Evans) - Layered Architecture
 */
@Retention(RetentionPolicy.CLASS)
@Target({ ElementType.PACKAGE, ElementType.TYPE })
public @interface ApplicationLayer {
}