org.apache.juneau.rest.annotation.RestDestroy Maven / Gradle / Ivy

Go to download
// ***************************************************************************************************************************
// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
// * to you 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.apache.juneau.rest.annotation;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;

import java.lang.annotation.*;

import jakarta.servlet.*;

import org.apache.juneau.rest.*;

/**
 * Identifies a method that gets called during servlet destroy.
 *
 * 
 * This method is called from within the {@link Servlet#destroy()}.
 *
 * 

 * The only valid parameter type for this method is {@link RestContext}, although typically no arguments will
 * be specified.
 *
 * 
Example:
 * 
 * 	@Rest(...)
 * 	public class PetStoreResource extends BasicRestServlet implements BasicUniversalJenaConfig {
 *
 * 		// Our database.
 * 		private Map<Integer,Pet> petDB;
 *
 * 		@RestDestroy
 * 		public void onDestroy() {
 * 			petDB = null;
 * 		}
 * 	}
 * 
 *
 * Notes:

 * 	
 * 		The method should return void although if it does return any value, the value will be ignored.
 * 	

 * 		The method should be public although other visibilities are valid if the security manager allows it.
 * 	

 * 		Static methods can be used.
 * 	

 * 		Multiple destroy methods can be defined on a class.
 * 		
Destroy methods on child classes are invoked before destroy methods on parent classes.
 * 		
The order of destroy method invocations within a class is alphabetical, then by parameter count, then by parameter types.
 * 	

 * 		In general, destroy methods should not throw any exceptions, although if any are thrown, the stack trace will be
 * 		printed to System.err.
 * 	

 * 		Note that if you override a parent method, you probably need to call super.parentMethod(...).
 * 		
The method is still considered part of the parent class for ordering purposes even though it's
 * 		overridden by the child class.
 * 
 *
 * See Also:

 * 	Lifecycle Hooks
 * 
 */
@Target({METHOD,TYPE})
@Retention(RUNTIME)
@Inherited
@Repeatable(RestDestroyAnnotation.Array.class)
public @interface RestDestroy {

	/**
	 * Dynamically apply this annotation to the specified methods.
	 *
	 * See Also:

	 * 	Dynamically Applied Annotations
	 * 
	 *
	 * @return The annotation value.
	 */
	String[] on() default {};
}