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From Oliver Heger <oliver.he...@oliver-heger.de>
Subject Re: [commons-configuration] About reloading and thread-safety
Date Tue, 28 Sep 2010 18:40:09 GMT
Am 28.09.2010 14:02, schrieb Siddhartha S:
> Hi,
>
>
> As per documentation, most of the concrete implementations of the Configuration
> interface are not thread-safe when modifications are involved. However, looking
> at AbstractFileConfiguration (
> http://svn.apache.org/repos/asf/commons/proper/configuration/trunk/src/java/org/apache/commons/configuration/AbstractFileConfiguration.java
>   ) and
> (http://svn.apache.org/repos/asf/commons/proper/configuration/trunk/src/java/org/apache/commons/configuration/AbstractHierarchicalFileConfiguration.java)
>   , it appears that access *is* synchronized through a reload lock. Do the
> concrete implementations (e.g XMLConfiguration) do something that makes them non
> thread-safe with respect to reloads?

The lock you mention is just for protecting reload operations (i.e. if 
the file on disk has changed). There is no protection against concurrent 
updates by multiple threads. This is in the responsibility of the developer.

Oliver

>
>
> thanks,
> -Sidharta S


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