/*
 * 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.camel.spi.annotations;

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

/**
 * Marks this class to be eager loaded by the JDK classloader so the class is already loaded when Camel is started.
 *
 * This is intended to assist required classes that Camel always uses.
 *
 * <b>Important:</b> The class must have the following static method which will be invoked to force loading the class.
 * 
 * <pre>
 * public static void onClassloaded(org.slf4j.Logger log) {
 *     .. do warmup here such as logging the class name or create inner classes to force loading them
 *     log.trace("Loaded {}", this.getClass().getName());
 * }
 * </pre>
 */
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface EagerClassloaded {
}
