Starting with release 4.0, initialization properties are now resolved in the following order (for inspiration from the community, see this
forum post):
- defaults are loaded from the classpath
- any overrides from transactions.properties (if found in the classpath) are applied
- any overrides from jta.properties (if found in the classpath) are applied
- any overrides in a properties file specified by the optional system property com.atomikos.icatch.file are applied
- any overrides set in a programmatic way are applied
- any overrides set a system properties are applied
- placeholder substitution is done for the resulting set of properties
