gistfile1.java

private static String getUniqueFileId(){
		String fileId=getRandomString(FILE_ID_LENGTH);
		LoggerDAO loggerDao = ObjectContainer.getObject("LoggerDAO");
		int count = 1;
		try {
			while(!loggerDao.isFileIdUnique(fileId)){
				Logger.log(componentName, levelInfo, requestTransaction,
						sourceId, customerId,null, "File Id:"+fileId+" exists. Retry new fileId ..!");
				fileId=getRandomString(FILE_ID_LENGTH);
				if(count++ > 20){
					Logger.log(componentName,levelDebug, requestTransaction,
							sourceId, customerId,null, "Finding unique key took 21 cycles,It's time to increase the key size..!");
				}
			}
		} catch (DataAccessException e) {
			Logger.log(componentName,levelError, requestTransaction,
					sourceId, customerId,e, "Error in validating the uniqueness of fileId..");
		}
		return fileId;
	}