Spring Boot无法设置缓存

Question

尝试在Spring Boot项目中设置Memcache，但它不起作用。我甚至尝试设置默认缓存（ConcurrentMapCacheManager），但效果并不理想。

我读过的每个教程（甚至是Spring官方）都说这种配置足以设置缓存

缓存配置：

@Configuration
@EnableCaching
public class CacheConfiguration {

    @Bean
    public CacheManager cacheManager() {
        return new ConcurrentMapCacheManager("test_cache");
    }

}

缓存使用：

@Service
@CacheConfig(cacheNames = "test_cache")
public class UserServiceImpl extends IUserService {
  ...
    @Cacheable
    public UserEntity getByEmail(String email) {
        UserEntity entity = repository.findByEmail(email);

        return entity;
    }
...
}

波姆。xml

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>1.5.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <version>1.5.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>   
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.2.12.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.2.12.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hsqldb</groupId>
            <artifactId>hsqldb</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>commons-pool</groupId>
            <artifactId>commons-pool</artifactId>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
        </dependency>
        <dependency>
            <groupId>com.vladmihalcea</groupId>
            <artifactId>hibernate-types-52</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2.2</version>
        </dependency>
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.0.Final</version>
        </dependency>
        <dependency>
            <groupId>io.reactivex.rxjava2</groupId>
            <artifactId>rxjava</artifactId>
            <version>2.1.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
    </dependencies>

是否有可能某些依赖项与spring缓存依赖项冲突？

Answer 1

我刚刚创建了一个演示项目来演示这个简单的缓存配置是如何工作的。

@Configuration
@EnableCaching
public class CachingConfig {

    @Bean
    public CacheManager cacheManager() {
        return new ConcurrentMapCacheManager("test_cache");
    }
}

服务的接口。

public interface TestDataService {
    String getEmail(String email);
}

相应的实现。

@Service
@CacheConfig(cacheNames={"test_cache"})
public class TestDataServiceImpl implements TestDataService {

    @Cacheable
    public String getEmail(String email) {
        return email;
    }
}

还有一个虚拟控制器。

@RestController
public class TestDataController {

    private TestDataService testDataService;

    @Autowired
    public TestDataController(TestDataService testDataService) {
        this.testDataService = testDataService;
    }

    @RequestMapping(value = "test")
    String getEmail() {
        return testDataService.getEmail("test.me");
    }
}

然后，当您调用http请求localhost:8080/test并在TestDataServiceImpl中放置一个断点时。getEmail（）您可以看到，只有在第一次实际执行该方法时。

我已经在github中添加了代码，如果您愿意的话，可以查看一下。

Answer 2

如果您使用的是Memcached，那么您的UserEntity应该被序列化（即UserEntity实现Serializable）。

您可以在此处查看使用Memcache的Spring Boot的小示例项目。