使用的spring boot 相關(guān)情況
目前使用的spring boot 的版本是 1.5.2.RELEASE, 數(shù)據(jù)庫(kù)操作使用的是 spring-boot-starter-data-jpa，redis使用的是spring-boot-starter-data-redis
數(shù)據(jù)庫(kù)操作我使用的是spring boot 提供的 JPA repository，redis使用的是Redis Repositories。
一個(gè)常見(jiàn)的場(chǎng)景是，通過(guò) JPA 保存一個(gè)數(shù)據(jù)到 mysql 中，成功之后，更新 redis 的 hash對(duì)象。
按照 spring data redis repositories 官方文檔的介紹我需要配置下實(shí)體。
2.相關(guān)代碼
以保存訂單為例，傳入一個(gè)DTO，調(diào)用jpa方法寫(xiě)入到數(shù)據(jù)庫(kù)，成功之后寫(xiě)入緩存。
主要的代碼如下：
主文件中使用啟用緩存功能
@EnableRedisRepositories(basePackages = {"com.test"})
@EnableCaching
@SpringBootApplication
@EnableJpaRepositories(basePackages = {"com.test"})
@EnableRedisRepositories(basePackages = {"com.test"})
@EnableCaching
@EnableJpaAuditing
@EntityScan(basePackages = {"com.test"})
@ComponentScan(basePackages = {"com.test"} )
public class Application {
private static final Logger LOGGER = LoggerFactory.getLogger(Application.class);
public static void main(String[] args) {
final ApplicationContext applicationContext = SpringApplication.run(Application.class, args);
final String[] activeProfiles = applicationContext.getEnvironment().getActiveProfiles();
for (String profile : activeProfiles) {
LOGGER.info("using profile {}", profile);
}
}
}RedisConfig重寫(xiě)了一些緩存的功能
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {
@Override
@Bean
public KeyGenerator keyGenerator() {
return new KeyGenerator() {
@Override
public Object generate(Object target, Method method, Object... params) {
StringBuilder sb = new StringBuilder();
sb.append(target.getClass().getName());
sb.append(method.getName());
for (Object obj : params) {
sb.append(obj.toString());
}
System.out.println(sb.toString());
return sb.toString();
}
};
}
@Bean
public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {
StringRedisTemplate template = new StringRedisTemplate(factory);
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
template.setValueSerializer(jackson2JsonRedisSerializer);
template.afterPropertiesSet();
return template;
}
@Bean
public CacheManager cacheManager(RedisTemplate redisTemplate) {
RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
cacheManager.setDefaultExpiration(300);
return cacheManager;
}
}OrderService 調(diào)用保存方法保存數(shù)據(jù)到數(shù)據(jù)庫(kù)，這里使用了@CachePut注解，生成的key的主鍵是order:100這種形式
@CachePut(value = "order", key = "#order.id")
@Override
public void save(OrderDTO orderDTO) {
try {
Order order = BeanMapper.map(orderDTO, Order.class);
order = orderRepository.save(order);
System.out.println(order);
} catch (Exception e) {
e.printStackTrace();
}
}實(shí)體的設(shè)置如下，這里同時(shí)使用了 JPA 的配置和 Redis的配置，就是這塊兒比較模糊，不知道是否正確。
@Entity
@Table(name = "order")
@RedisHash(value = "order")
public class Order {
private Long id;
private Long userId;
@org.springframework.data.annotation.Id
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}我現(xiàn)在遇到的主要問(wèn)題是：
1) 在Order實(shí)體配置中，如果我在Id上配置了 redis 的 ID 注解 @org.springframework.data.annotation.Id, 生成的redis key類似這樣 order:1222702657038933405, 我想要的效果是生成的key直接使用訂單id，類似這樣 order:100.
我在Service上有配置 @CachePut(value = "order", key = "#order.id") 但是沒(méi)有生效。
2) debug的時(shí)候發(fā)現(xiàn)，就算生成的對(duì)象，id也有了仍然會(huì)報(bào)表達(dá)式的id屬性不存在
Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1007E: Property or field 'id' cannot be found on null
at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:220) ~[spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:94) ~[spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.expression.spel.ast.PropertyOrFieldReference.accessrrreee0(PropertyOrFieldReference.java:46) ~[spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.expression.spel.ast.PropertyOrFieldReference$AccessorLValue.getValue(PropertyOrFieldReference.java:375) ~[spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88) ~[spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:120) ~[spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:242) ~[spring-expression-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.cache.interceptor.CacheOperationExpressionEvaluator.key(CacheOperationExpressionEvaluator.java:117) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.cache.interceptor.CacheAspectSupport$CacheOperationContext.generateKey(CacheAspectSupport.java:742) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.cache.interceptor.CacheAspectSupport.generateKey(CacheAspectSupport.java:558) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.cache.interceptor.CacheAspectSupport.collectPutRequests(CacheAspectSupport.java:529) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:413) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:327) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:61) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at com.jiabangou.order.services.impls.OrderServiceImpl$$EnhancerBySpringCGLIB$ceab7f.save(<generated>) ~[classes/:na]
at com.jiabangou.bops.controllers.api.OrderApiController.save(OrderApiController.java:32) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_65]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_65]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
... 95 common frames omitted3) 拋開(kāi)redis創(chuàng)建的key不對(duì)的問(wèn)題，發(fā)現(xiàn)redis對(duì)象能夠保存成功，但是數(shù)據(jù)庫(kù)的記錄確沒(méi)有成功創(chuàng)建。如果去掉Order實(shí)體上的@RedisHash(value = "order")注解，數(shù)據(jù)庫(kù)記錄能夠成功創(chuàng)建，但是緩存又無(wú)法創(chuàng)建成功了。
1
0
0
閉關(guān)修行中......
首先key應(yīng)該是屬性名
@CachePut(value = "order", key = "#orderDTO.id")
其次@RedisHash在對(duì)象持久化到redis中使用，你這里要使用的是redis緩存，不是持久化，所以不關(guān)RedisHash什么事。
