Grails:在 Bootstrap 代码的 destory 闭包中访问 spring bean? [英] Grails: Accessing spring beans in the destory closure of Bootstrap code?

问题描述

我希望在我的 grails 项目的 Bootstrap.groovy 中的 destroy 闭包中访问一个 bean.关于如何实现这一目标的任何想法?

I'm looking to access a bean in my destroy closure in the Bootstrap.groovy of my grails project. Any ideas on how to achieve this?

我似乎无法访问 servletContext...?

I seem to have no access to servletContext...?

推荐答案

您可以使用该代码块从任何地方(包括 BootStrap 的 destroy 闭包)获取对 applicationContext 的引用:

You can obtain a a reference to the applicationContext from everywhere (including the destroy closure of BootStrap) using that chunk of code:

def ctx = org.codehaus.groovy.grails.web.context.ServletContextHolder.servletContext.getAttribute(org.codehaus.groovy.grails.web.servlet.GrailsApplicationAttributes.APPLICATION_CONTEXT);

获取对 bean 的引用就像 ctx.beanName 一样简单.

Getting a reference to a bean is as easy as ctx.beanName.

这是一个可以简化此任务的小型 util 类(用 Java 编写):

Here is a small util class (written in Java) that can simplify this task:

import org.springframework.context.ApplicationContext;
import org.codehaus.groovy.grails.web.context.ServletContextHolder;
import org.codehaus.groovy.grails.web.servlet.GrailsApplicationAttributes;

public class SpringUtil {

    public static ApplicationContext getCtx() {
        return getApplicationContext();
    }

    public static ApplicationContext getApplicationContext() {
        return (ApplicationContext) ServletContextHolder.getServletContext().getAttribute(GrailsApplicationAttributes.APPLICATION_CONTEXT);
    }

    @SuppressWarnings("unchecked")
    public static <T> T getBean(String beanName) {
        return (T) getApplicationContext().getBean(beanName);
    }

}

和一个例子:

def bean = SpringUtil.getBean("beanName")

干杯，西吉

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