ConditionalOnMissingAmazonClient.java

/*
 * Copyright 2013-2014 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.springframework.cloud.aws.context.annotation;

import org.springframework.context.annotation.Conditional;

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

/**
 * @author Alain Sahli
 * @since 1.0
 */
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.TYPE})
@Conditional(OnMissingAmazonClientCondition.class)
public @interface ConditionalOnMissingAmazonClient {

    /**
     * <p>The Amazon clients that needs to be available in order to match the condition.</p>
     *
     * <b>IMPORTANT</b>: This condition does not verify the presence of a client, based on the type, but based on the
     * default name as computed in {@link org.springframework.cloud.aws.core.config.AmazonWebserviceClientConfigurationUtils#getBeanName}.
     */
    Class<?> value();

}