Question

有没有办法动态重新初始化spring bean？

在应用启动时，我通过web.xml中的ContextLoaderListener初始化spring bean。

我的用例是，在运行时可能会出现新属性文件被加载到内存中的情况（通过Apache commons配置），我想重新初始化bean，这样就可以在不重新启动的情况下生效。

对此的任何指示表示赞赏。

Answer 1

能够通过让类实现ApplicationContextAware

来解决它

public class ReloadConfig implements ApplicationContextAware{

private static Logger log = Logger.getLogger(ReloadConfig.class);


private Config config;

@Autowired
ApplicationContext applicationContext;

private ReloadConfig() {
    // Exists only to defeat instantiation.
    config = Config.getInstance();
}

public void reloadIfNotLoaded() throws ConfigurationException{

    CompositeConfiguration configuration = new CompositeConfiguration();

    if(config.getHealthFile() == null){

        log.info("Reloading Adding default properties found in config.properties");
        configuration.addConfiguration(new PropertiesConfiguration("config.properties"));


        ConfigurableApplicationContext configurableApplicationContext = (ConfigurableApplicationContext)getApplicationContext();
        configurableApplicationContext.refresh();
        setApplicationContext(configurableApplicationContext);
    }



}

public void setApplicationContext(ApplicationContext context) throws BeansException {
    applicationContext = context;
}

public ApplicationContext getApplicationContext() {
    return applicationContext;
}

在没有app服务器重启或运行时重新初始化spring bean

1 个答案: