Currently I am developing a web based application which will be deployed on a variety of java web application containers. The code Ive written to read/write .properties files is using apache commons, the code can be seen below;

FileBasedConfigurationBuilder<PropertiesConfiguration> builder = configs.propertiesBuilder(PATH_TO_PROPERTIES);
..update some properties

builder.save();

Unfortunately an exception is thrown stating that I was unable to write to vfs:/...... I assume the Apache Commons is not handling vfs, has anyone encountered this before? How can it be commonly resolved to support multiple types of application servers?

18:51:31,317 ERROR [com.company.pkg.PropertiesUtil] (default task-31) Unable to update properties: org.apache.commons.configuration2.ex.ConfigurationException: Could not save to URL vfs:/content/MyApplication.war/WEB-INF/classes/config.properties

at org.apache.commons.configuration2.io.DefaultFileSystem.getOutputStream(DefaultFileSystem.java:97)

at org.apache.commons.configuration2.io.FileHandler.save(FileHandler.java:1214)

at org.apache.commons.configuration2.io.FileHandler.save(FileHandler.java:1163)

at org.apache.commons.configuration2.io.FileHandler.save(FileHandler.java:805)

at org.apache.commons.configuration2.builder.FileBasedConfigurationBuilder.save(FileBasedConfigurationBuilder.java:240)

.....

Caused by: java.net.UnknownServiceException: protocol doesn't support output

at java.net.URLConnection.getOutputStream(URLConnection.java:843)

at org.apache.commons.configuration2.io.DefaultFileSystem.getOutputStream(DefaultFileSystem.java:86)

... 94 more