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/*
 * Copyright 2015-2018 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.data.redis.core;

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

import org.springframework.core.annotation.AliasFor;
import org.springframework.data.annotation.Persistent;
import org.springframework.data.keyvalue.annotation.KeySpace;

/**
 * {@link RedisHash} marks Objects as aggregate roots to be stored in a Redis hash.
 *
 * @author Christoph Strobl
 * @since 1.7
 */
@Persistent
@Documented
@Inherited
@Retention(RetentionPolicy.RUNTIME)
@Target(value = { ElementType.TYPE })
@KeySpace
public @interface RedisHash {

	/**
	 * The prefix to distinguish between domain types.
	 *
	 * @return
	 * @see KeySpace
	 */
	@AliasFor(annotation = KeySpace.class, attribute = "value")
	String value() default "";

	/**
	 * Time before expire in seconds. Superseded by {@link TimeToLive}.
	 *
	 * @return positive number when expiration should be applied.
	 */
	long timeToLive() default -1L;

}