在spring boot中启用Redis缓存-Java 学习之路

我的 spring 启动项目有以下配置 .

@SpringBootApplication
@EnableTransactionManagement
@EnableCaching
@EnableScheduling
@EnableAsync
public class Application {

    String redisHost = "localhost";
    int redisPort = 6379;

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
    @Bean
    JedisConnectionFactory jedisConnectionFactory() {
        JedisConnectionFactory factory = new JedisConnectionFactory();
        factory.setHostName(redisHost);
        factory.setPort(redisPort);
        factory.setUsePool(true);
        return factory;
    }
    @Bean
    RedisTemplate<Object, Object> redisTemplate() {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<Object, Object>();
        redisTemplate.setConnectionFactory(jedisConnectionFactory());
        return redisTemplate;
    }
    @Bean
    public CacheManager cacheManager() {
        RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate());
        return cacheManager;
    }
}

我也跟随maven对pom的依赖 .

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>

我在定义端口上的本地计算机上运行了一个单独的redis服务器 . 同样在我的服务类中，我有@Cacheable，@ CachePut等注释来支持缓存 .

我可以毫无错误地启动Spring启动应用程序，CRUD操作也可以 . 但似乎它没有使用定义的redis缓存 . 我使用'redi desktop manger'浏览工具，但在redis上找不到任何数据 . 我也尝试通过redis cli命令'monitor'监控redis服务器，我在监视器上看不到任何变化 .

所以我认为redis缓存仍然无法在我的spring启动应用程序上运行 . 有人能帮我解决问题吗？

我使用的是 Spring 季启动版1.4.2.RELEASE

谢谢！

1 回答

鉴于您使用的是Spring Boot，因此大部分Redis配置都是不必要的，因为Spring Boot为Redis提供了“自动配置”支持，无论是data source还是caching provider .

您还没有具体说明您使用的是什么版本的Spring Boot（例如 1.5.0.RC1 ）来运行您的应用程序，或者您是否在应用程序的类路径上有任何 application.properties ，如果您明确指定了 spring.cache.type （设置为除了"redis"，例如） .

但是，一般来说，我真的看不到你的Redis或Spring Cache @Configuration 类有多大问题 . 但是，如果没有明确设置 cacheManager.setUsePrefix(true) ，它似乎确实存在问题 . 当我设置这个 RedisCacheManager 属性（'usePrefix`）时，一切都按预期工作 .

我不是（Spring Data）Redis的专家，所以我不确定为什么需要它 . 但是，我的测试配置基于Spring Boot的"auto-configuration" support for Redis caching以及 @Configuration "Application"类，如上所示 .

而且，因为您可以消除大部分显式配置并使用Spring Boot的"auto-configuration" support for Redis作为数据源，所以我在我的测试类中添加了一个 "AutoRedisConfiguration" @Configuration 类 . 即您可以使用它来配置Redis而不是我的其他 @Configuration 类（ "CustomRedisConfiguration" ），它使用您的配置 fix .

这是完整的测试示例......

/*
 * Copyright 2017 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.spring.cache;

import static org.assertj.core.api.Assertions.assertThat;

import java.util.Arrays;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.annotation.PostConstruct;

import org.junit.Before;
import org.junit.FixMethodOrder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.MethodSorters;
import org.spring.cache.CachingWithRedisIntegrationTest.CachingWithRedisConfiguration;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.concurrent.ConcurrentMapCacheManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.Profile;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.util.Assert;

/**
 * Integration tests testing Spring's Cache Abstraction using Spring Data Redis auto-configured with Spring Boot.
 *
 * To run this test, first start a Redis Server on localhost listening on the default port, 6379.
 *
 * @author John Blum
 * @see org.junit.Test
 * @since 1.0.0
 */
@RunWith(SpringRunner.class)
@ActiveProfiles("auto")
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
@ContextConfiguration(classes = CachingWithRedisConfiguration.class)
@SuppressWarnings("unused")
public class CachingWithRedisIntegrationTest {

  protected static final int REDIS_PORT = 6379;
  protected static final String REDIS_HOST = "localhost";

  private AtomicBoolean setup = new AtomicBoolean(false);

  @Autowired
  private MathService mathService;

  @Autowired(required = false)
  private RedisTemplate<Object, Object> redisTemplate;

  @Before
  public void setup() {
    if (redisTemplate != null && !setup.getAndSet(true)) {
      redisTemplate.delete(Arrays.asList(0L, 1L, 2L, 4L, 8L));
    }
  }

  @Test
  public void firstCacheMisses() {
    assertThat(mathService.factorial(0L)).isEqualTo(1L);
    assertThat(mathService.wasCacheMiss()).isTrue();
    assertThat(mathService.factorial(1L)).isEqualTo(1L);
    assertThat(mathService.wasCacheMiss()).isTrue();
    assertThat(mathService.factorial(2L)).isEqualTo(2L);
    assertThat(mathService.wasCacheMiss()).isTrue();
    assertThat(mathService.factorial(4L)).isEqualTo(24L);
    assertThat(mathService.wasCacheMiss()).isTrue();
    assertThat(mathService.factorial(8L)).isEqualTo(40320L);
    assertThat(mathService.wasCacheMiss()).isTrue();
  }

  @Test
  public void thenCacheHits() {
    assertThat(mathService.factorial(0L)).isEqualTo(1L);
    assertThat(mathService.wasCacheMiss()).isFalse();
    assertThat(mathService.factorial(1L)).isEqualTo(1L);
    assertThat(mathService.wasCacheMiss()).isFalse();
    assertThat(mathService.factorial(2L)).isEqualTo(2L);
    assertThat(mathService.wasCacheMiss()).isFalse();
    assertThat(mathService.factorial(4L)).isEqualTo(24L);
    assertThat(mathService.wasCacheMiss()).isFalse();
    assertThat(mathService.factorial(8L)).isEqualTo(40320L);
    assertThat(mathService.wasCacheMiss()).isFalse();
  }

  interface MathService {
    boolean wasCacheMiss();
    long factorial(long number);
  }

  @EnableCaching
  @SpringBootConfiguration
  @Import({ AutoRedisConfiguration.class, CustomRedisConfiguration.class })
  static class CachingWithRedisConfiguration {

    @Bean
    MathService mathService() {
      return new MathService() {
        private final AtomicBoolean cacheMiss = new AtomicBoolean(false);

        @Override
        public boolean wasCacheMiss() {
          return cacheMiss.getAndSet(false);
        }

        @Override
        @Cacheable(cacheNames = "Factorials")
        public long factorial(long number) {
          cacheMiss.set(true);

          Assert.isTrue(number >= 0L, String.format("Number [%d] must be greater than equal to 0", number));

          if (number <= 2L) {
            return (number < 2L ? 1L : 2L);
          }

          long result = number;

          while (--number > 1) {
            result *= number;
          }

          return result;
        }
      };
    }

    @Bean
    @Profile("none")
    CacheManager cacheManager() {
      return new ConcurrentMapCacheManager();
    }
  }

  @Profile("auto")
  @EnableAutoConfiguration
  @SpringBootConfiguration
  static class AutoRedisConfiguration {

    @PostConstruct
    public void afterPropertiesSet() {
      System.out.println("AUTO");
    }

    @Bean
    static PropertySourcesPlaceholderConfigurer propertyPlaceholderConfigurer() {
      PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer =
        new PropertySourcesPlaceholderConfigurer();
      propertySourcesPlaceholderConfigurer.setProperties(redisProperties());
      return propertySourcesPlaceholderConfigurer;
    }

    static Properties redisProperties() {
      Properties redisProperties = new Properties();

      redisProperties.setProperty("spring.cache.type", "redis");
      redisProperties.setProperty("spring.redis.host", REDIS_HOST);
      redisProperties.setProperty("spring.redis.port", String.valueOf(REDIS_PORT));

      return redisProperties;
    }
  }

  @Profile("custom")
  @SpringBootConfiguration
  static class CustomRedisConfiguration {

    @PostConstruct
    public void afterPropertiesSet() {
      System.out.println("CUSTOM");
    }

    @Bean
    JedisConnectionFactory jedisConnectionFactory() {
      JedisConnectionFactory factory = new JedisConnectionFactory();
      factory.setHostName(REDIS_HOST);
      factory.setPort(REDIS_PORT);
      factory.setUsePool(true);
      return factory;
    }

    @Bean
    RedisTemplate<Object, Object> redisTemplate() {
      RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
      redisTemplate.setConnectionFactory(jedisConnectionFactory());
      return redisTemplate;
    }

    @Bean
    CacheManager cacheManager() {
      RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate());
      cacheManager.setUsePrefix(true); // THIS IS NEEDED!
      return cacheManager;
    }
  }
}

希望这可以帮助！

干杯，约翰

在spring boot中启用Redis缓存

1 回答

相关问题