Code Discussion 2008-11-03

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Previous topic 2008-10-20

PropertyReader

Current situation

• PropertyReader

   public static String getProperty(String key) throws IOException, URISyntaxException
   {
       // First check system properties
       String value = System.getProperty(key);
       if (value != null)
       {
           return value;
       }
       // Check properties file
       if (properties == null)
       {
           loadProperties();
       }
       // Get the property
       value = properties.getProperty(key);
       return value;
   }

• Static helper class
• loads properties from solution-specific properties file (e.g. pubman.properties, faces.properties)

Problem

If more than one solution is deployed on the same JBoss instance, the following happens:

• When the first solution reads a property, the appropriate properties file is loaded.
• When another solution reads a property that was already defined by the first solution, that property is given back (although it may have a wrong value), i.e. that solution does not work correctly.
• When another solution reads a property that wasn't already defined by the first solution, the according properties file is also read in overwriting the properties that exist in both files. I.e. the first solution doesn't work correctly.

• Similar issue with ServiceLocator.

Ideas

• Only use unambiguous properties
  • But: e.g. framework url
• Define properties set per solution (How?)

Next topic

Next topic 2008-11-10

Open source Java EE-based application server