6: 这是一个很有趣的示例Spring Boot项目,使用Giraphe CMS和Spring Boot。 Giraphe是基于Spring Boot的CMS框架。
https://github.com/creactiviti/graffiti
https://mp.weixin.qq.com/s/pdSWAhrwypgGWHwBLOxI0Q
Headless Java CMS Framework https://github.com/creactiviti/giraphe
Headless Java CMS https://github.com/creactiviti/graffiti#how-do-i-use-it-for-my-own-project
作者:尤雨溪
链接:https://www.zhihu.com/question/38596306/answer/79714979
来源:知乎
著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。
GraphQL 确实并没有『火起来』,我觉得是这么几个因素:
1. 要在前端爽爽地使用 GraphQL,必须要在服务端搭建符合 GraphQL spec 的接口,基本上是整个改写服务端暴露数据的方式。目前 FB 官方就只有一个 Node.js 的 reference implementation,其他语言都是社区爱好者自己搞的。另外,GraphQL 在前端如何与视图层、状态管理方案结合,目前也只有 React/Relay 这个一个官方方案。换句话说,如果你不是已经在用 Node + React 这个技术栈,引入 GraphQL 成本略高,风险也不小,这就很大程度上限制了受众。
2. GraphQL 的 field resolve 如果按照 naive 的方式来写,每一个 field 都对数据库直接跑一个 query,会产生大量冗余 query,虽然网络层面的请求数被优化了,但数据库查询可能会成为性能瓶颈,这里面有很大的优化空间,但并不是那么容易做。FB 本身没有这个问题,因为他们内部数据库这一层也是抽象掉的,写 GraphQL 接口的人不需要顾虑 query 优化的问题。
3. 这个事情到底由谁来做?GraphQL 的利好主要是在于前端的开发效率,但落地却需要服务端的全力配合。如果是小公司或者整个公司都是全栈,那可能可以做,但在很多前后端分工比较明确的团队里,要推动 GraphQL 还是会遇到各种协作上的阻力。这可能是没火起来的根本原因。
package org.springframework.context.annotation; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; /** * Indicates whether a bean is to be lazily initialized. * * <p>May be used on any class directly or indirectly annotated with {@link * org.springframework.stereotype.Component @Component} or on methods annotated with * {@link Bean @Bean}. * * <p>If this annotation is not present on a {@code @Component} or {@code @Bean} definition, * eager initialization will occur. If present and set to {@code true}, the {@code @Bean} or * {@code @Component} will not be initialized until referenced by another bean or explicitly * retrieved from the enclosing {@link org.springframework.beans.factory.BeanFactory * BeanFactory}. If present and set to {@code false}, the bean will be instantiated on * startup by bean factories that perform eager initialization of singletons. * * <p>If Lazy is present on a {@link Configuration @Configuration} class, this * indicates that all {@code @Bean} methods within that {@code @Configuration} * should be lazily initialized. If {@code @Lazy} is present and false on a {@code @Bean} * method within a {@code @Lazy}-annotated {@code @Configuration} class, this indicates * overriding the 'default lazy' behavior and that the bean should be eagerly initialized. * * <p>In addition to its role for component initialization, this annotation may also be placed * on injection points marked with {@link org.springframework.beans.factory.annotation.Autowired} * or {@link javax.inject.Inject}: In that context, it leads to the creation of a * lazy-resolution proxy for all affected dependencies, as an alternative to using * {@link org.springframework.beans.factory.ObjectFactory} or {@link javax.inject.Provider}. * * @author Chris Beams * @author Juergen Hoeller * @since 3.0 * @see Primary * @see Bean * @see Configuration * @see org.springframework.stereotype.Component */ @Target({ElementType.TYPE, ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.FIELD}) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface Lazy { /** * Whether lazy initialization should occur. */ boolean value() default true; }