spring-data-redis RedisConnectionCommands 源码
spring-data-redis RedisConnectionCommands 代码
文件路径：/src/main/java/org/springframework/data/redis/connection/RedisConnectionCommands.java
/*
* Copyright 2011-2022 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
*
* https://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.connection;
import org.springframework.lang.Nullable;
/**
* Connection-specific commands supported by Redis.
*
* @author Costin Leau
* @author Christoph Strobl
* @author Mark Paluch
*/
public interface RedisConnectionCommands {
/**
* Select the DB with given positive {@code dbIndex}.
*
* @param dbIndex the database index.
* @see <a href="https://redis.io/commands/select">Redis Documentation: SELECT</a>
*/
void select(int dbIndex);
/**
* Returns {@code message} via server roundtrip.
*
* @param message the message to echo.
* @return the message or {@literal null} when used in pipeline / transaction.
* @see <a href="https://redis.io/commands/echo">Redis Documentation: ECHO</a>
*/
@Nullable
byte[] echo(byte[] message);
/**
* Test connection.
*
* @return Server response message - usually {@literal PONG}. {@literal null} when used in pipeline / transaction.
* @see <a href="https://redis.io/commands/ping">Redis Documentation: PING</a>
*/
@Nullable
String ping();
}
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