[jira] [Commented] (CONFIGURATION-646) autoSave and manual save behave differently

["Oliver Heger (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CONFIGURATION-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15761765#comment-15761765 ] 

Oliver Heger commented on CONFIGURATION-646:
--------------------------------------------

Thanks for the report and the test case. I will have a look in a few days.

> autoSave and manual save behave differently
> -------------------------------------------
>
>                 Key: CONFIGURATION-646
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-646
>             Project: Commons Configuration
>          Issue Type: Bug
>    Affects Versions: 2.1
>            Reporter: Christian Rudolph
>            Priority: Minor
>
> Using {{builder.autoSave(true)}} behaves differently than {{builder.save()}} to the aspect that {{builder.autoSave(true)}} doesn't write newly added properties to the assigned config file.
> I've set up a minimal example using only two dependencies:
> commons-beanutils:commons-beanutils:1.9.3 (runtime)
> org.apache.commons:commons-configuration2:2.1.0 (compiletime)
> {code}
> public class Main {
>     public static void main(String... args) {
>         Parameters params = new Parameters();
>         File propertiesFile = new File("conf.properties");
>         FileBasedConfigurationBuilder<PropertiesConfiguration> builder =
>                 new FileBasedConfigurationBuilder<>(PropertiesConfiguration.class)
>                         .configure(params.fileBased().setFile(propertiesFile));
>         builder.setAutoSave(true);
>         try {
>             PropertiesConfiguration config = builder.getConfiguration();
>             config.setProperty("foo", "bar");
>             // builder.save();
>         } catch (ConfigurationException e) {
>             e.printStackTrace();
>         }
>     }
> }
> {code}
> This is mainly like the example from the documentation for filebased configurations.
> {{conf.properties}} exists and is empty. With the {{builder.save}} line commented out, the file remains empty. Uncommenting this line results in the expected behavior.
> I debugged a bit an saw that the property isn't added to the {{PropertiesConfigurationLayout}} in the first case.



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