Springboot Redis 연동

**** Redis를 도커로 실행중이라는 전제 하에 진행**

1. 연동

1. build.gradle에 의존성 추가

   ...
   dependencies {
   	implementation 'org.springframework.boot:spring-boot-starter-amqp'
   	**implementation 'org.springframework.boot:spring-boot-starter-data-redis'**
   	implementation 'org.springframework.boot:spring-boot-starter-web''
   	compileOnly 'org.projectlombok:lombok'
   	developmentOnly 'org.springframework.boot:spring-boot-devtools'
   	annotationProcessor 'org.projectlombok:lombok'
   	testImplementation 'org.springframework.boot:spring-boot-starter-test'
   	testImplementation 'org.springframework.amqp:spring-rabbit-test'
   }
   ...
   

2. application.yml에 연동 정보 설정

   Spring: 
   	redis:
   	    lettuce:
   	      pool:
   	        max-active: 5 # pool에 할당될 수 있는 최대 커넥션 수(음수: 무제한) 
   	        max-idle: 5 # pool의 idle 최대 커넥션 수(음수: 무제한)
   	        min-idle: 2 # pool에서 관리하는 idle 최소 커넥션 수
   	    host: 127.0.0.1
   	    port: 6379
   

   • lettuce: 생략 가능.

3. Redis 구성 클래스(RedisConfig.java) 작성

   package com.apple.api.redis.config;
   
   import org.springframework.beans.factory.annotation.Value;
   import org.springframework.context.annotation.Bean;
   import org.springframework.context.annotation.Configuration;
   import org.springframework.data.redis.connection.RedisConnectionFactory;
   import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
   import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
   import org.springframework.data.redis.core.RedisTemplate;
   import org.springframework.data.redis.serializer.StringRedisSerializer;
   
   // 커넥션 설정 및 템플릿 구성
   @Configuration
   public class RedisConfig {
   
   	@Value("${spring.redis.host}")
   	private String host;
   	
   	@Value("${spring.redis.port}")
   	private int port;
   	
   //	@Value("${spring.redis.password}")
   //	private String password;
   	
   // 커넥션 설정
   	@Bean
   	public RedisConnectionFactory redisConnectionFactory() {
   		RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();
   		redisStandaloneConfiguration.setHostName(host);
   		redisStandaloneConfiguration.setPort(port);
   //		redisStandaloneConfiguration.setPassword(password);
   		return new LettuceConnectionFactory(redisStandaloneConfiguration);
   	}
   	
   	@Bean
   	public RedisTemplate<String, Object> redisTemplate(){
   		RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
   		redisTemplate.setConnectionFactory(redisConnectionFactory());
   		redisTemplate.setKeySerializer(new StringRedisSerializer());
   		redisTemplate.setValueSerializer(new StringRedisSerializer());
   		return redisTemplate;
   	}
   	
   }
   

   package com.apple.api.redis.config;
   
   import org.springframework.beans.factory.annotation.Value;
   import org.springframework.context.annotation.Bean;
   import org.springframework.context.annotation.Configuration;
   import org.springframework.data.redis.connection.RedisConnectionFactory;
   import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
   import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
   import org.springframework.data.redis.core.RedisTemplate;
   import org.springframework.data.redis.serializer.StringRedisSerializer;
   
   // 커넥션 설정 및 템플릿 구성
   @Configuration
   public class RedisConfig {
   
   	@Value("${spring.redis.host}")
   	private String host;
   	
   	@Value("${spring.redis.port}")
   	private int port;
   		
   // 커넥션 설정
   	@Bean
   	public RedisConnectionFactory redisConnectionFactory() {
   		RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();
   		redisStandaloneConfiguration.setHostName(host);
   		redisStandaloneConfiguration.setPort(port);
   		return new LettuceConnectionFactory(redisStandaloneConfiguration);
   	}
   	
   // 템플릿 설정
   	@Bean
   	public RedisTemplate<String, Object> redisTemplate(){
   		RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
   		redisTemplate.setConnectionFactory(redisConnectionFactory());
   		redisTemplate.setKeySerializer(new StringRedisSerializer());
   		redisTemplate.setValueSerializer(new StringRedisSerializer());
   		return redisTemplate;
   	}
   	
   }
   

4. 컨트롤러(RedisController.java) 작성

   package com.apple.api.redis.controller;
   
   import java.util.Map;
   
   import org.springframework.data.redis.core.RedisTemplate;
   import org.springframework.data.redis.core.ValueOperations;
   import org.springframework.web.bind.annotation.GetMapping;
   import org.springframework.web.bind.annotation.PathVariable;
   import org.springframework.web.bind.annotation.PostMapping;
   import org.springframework.web.bind.annotation.RequestBody;
   import org.springframework.web.bind.annotation.RequestMapping;
   import org.springframework.web.bind.annotation.RestController;
   
   @RestController
   @RequestMapping("/redis")
   public class RedisController {
   
   	private final RedisTemplate<String, String> redisTemplate;
   
   	public RedisController(RedisTemplate<String, String> redisTemplate) {
   		this.redisTemplate = redisTemplate;
   	}
   	
   // set
   	@PostMapping("")
   	public String setRedisKey(@RequestBody Map<String, String> req){
   		ValueOperations<String, String> vop = redisTemplate.opsForValue();
   		try {
   			// Redis Set Key-value
   			vop.set(req.get("key").toString(), req.get("value").toString());
   			return "set message success";
   		} catch (Exception e) {
   			return "set message fail";
   		}
   	}
   	
   // get
   	@GetMapping("/{key}")
       public String getRedisKey(@PathVariable String key) {
           ValueOperations<String, String> vop = redisTemplate.opsForValue();
           return vop.get(key);
       }
   	
   }
   

   • setRedisKey: @RequestBody를 이용해 Map 형태로 받아와서 key와 value에 지정된 value 값을 저장
   • ValueOperations: Redis operations for simple (or in Redis terminology 'string') values.

5. Postman에서 데이터 저장해보기

   

   컨트롤러에 설정한 성공 시 리턴 값이 Response에 출력되면 성공

6. 잘 저장됐는지 볼까용

   1. PostMan에서 확인

      ~/redis/{조회할 키}

      

   2. redis-cli에서 확인

      docker exec -it ***letsj_compose-redis_1*** redis-cli

      • 저장된 모든 키 조회

        

      • 저장되어 있는 키로 조회

        

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