用apache的configuration实现实时配置
apache下commons有一个configeration包，对于做配置很方便，尤其是实时热配置。可以自动监测到配置文件的更改而reload配置文件。在项目中使用所以进行了一下封装。java 代码
[*]public class DefaultRealTimeXMLConfiger {
[*]
[*] private static Log logger = LogFactory.getLog(DefaultRealTimeXMLConfiger.class);
[*]
[*] private String fileName;
[*]
[*] private long reloadPeriod;
[*]
[*] private XMLConfiguration config;
[*]
[*] public void init()
[*] {
[*] String filePath = GlobalConfigerImpl.getConfDir()+"/"+fileName;
[*] logger.debug("will config with XML file["+filePath+"]");
[*]
[*] File file = new File(filePath);
[*] if (!file.exists() || !file.isFile()) {
[*] logger.error(" can't find file[" + filePath + "]");
[*] throw new IllegalArgumentException("config error! can't find file[" + filePath + "]");
[*] }
[*] this.init(file);
[*] }
[*]
[*] public void init(File file) {
[*] try {
[*] config = new XMLConfiguration(file);
[*] FileChangedReloadingStrategy fs = new FileChangedReloadingStrategy();
[*] fs.setConfiguration(config);
[*]
[*] if(this.reloadPeriod>0)
[*] {
[*] fs.setRefreshDelay(this.reloadPeriod);
[*] }
[*] config.setReloadingStrategy(fs);
[*]
[*] } catch (ConfigurationException e) {
[*] logger.error("error! configer error["+file.getPath()+"]");
[*] logger.error(e);
[*] e.printStackTrace();
[*] }
[*] }
[*]
[*] public Object getProperty(String name) {
[*] Object s = this.config.getProperty(name);
[*] return s;
[*] }
[*]
[*] public String getString(String name) {
[*] Object s = this.config.getProperty(name);
[*] String result = null;
[*] if (s != null)
[*] result = (String) s;
[*]
[*] return result;
[*] }
[*]
[*] public String[] getStringArray(String name) {
[*] String[] target = this.config.getStringArray(name);
[*]
[*] return target;
[*] }
[*]
[*]
[*] /**
[*] * @return Returns the fileName.
[*] */
[*] public String getFileName() {
[*] return fileName;
[*] }
[*]
[*] /**
[*] * @param fileName The fileName to set.
[*] */
[*] public void setFileName(String fileName) {
[*] this.fileName = fileName;
[*] }
[*]
[*] /**
[*] * @return Returns the reloadPeriod.
[*] */
[*] public long getReloadPeriod() {
[*] return reloadPeriod;
[*] }
[*]
[*] /**
[*] * @param reloadPeriod The reloadPeriod to set.
[*] */
[*] public void setReloadPeriod(long reloadPeriod) {
[*] this.reloadPeriod = reloadPeriod;
[*] }
[*]}
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