如何在春季动态加载配置文件

Question

In a running spring app, could it monitor a folder under which I could put more configuration file in which more beans are defined? I don't want to stop the app, but want the ability to add load more beans, so I am thinking of create a folder, and then put bean definitions into that folder, and let spring to pick it up and initialize the beans. I am wondering whether it is doable or not

Answer 1

You would need two things

1. A file watcher to watch for file system changes - JDK7 provides a way to do this.

2. Refresh the application context - You can use the refresh method of one of the AbstractRefreshableApplicationContext class: it won't refresh your previously instantiated beans, but next call on context will return refreshed beans.

Answer 2

you can create a properties file and load it dynamically

refer below code which i have used in my project:

private static Properties beanProps = new Properties();
beanFactoryFileProps.load(AppContext.class
                    .getResourceAsStream("configFile.properties"));
            Collection props = beanProps.values();
            String[] configFiles = null;
            if (!Utils.isEmpty(props)) {
                Object[] config = props.toArray();
                configFiles = new String[config.length];
                for (int i = 0; i < config.length; i++) {
                    configFiles[i] = (String) config[i];
                }
            } 
            else
            {
                configFiles=new String[] {"dispatcher-servlet.xml"};
            }

properties file as below

file1=dispatcher-servlet.xml
file2=ApplicationContext.xml
file2=QuartzSchedulerContext.xml