Override Default Configuration from Command-line

The default configuration can be overriden via command-line by passing to the java command system properties with the same name of the ones declared in configuration.

For example to override the HTTP Max Client Connections parameter it is sufficient to add the following option to the java command-line invocation:

-Dany23.http.client.max.connections=10

any23 and any23server scripts accept the variable ANY23_OPTS to specify custom options. It is possible to customize the HTTP Max Client Connections for the any23 script simply using:

cli/target/appassembler/bin/$ ANY23_OPTS="-Dany23.http.client.max.connections=10" any23 http://path/to/resource

Override Default Configuration Programmatically

The Configuration properties can be accessed in read-only mode just retrieving the configuration singleton instance.
Such instance is immutable:

final Configuration immutableConf = DefaultConfiguration.singleton();
final String propertyValue = immutableConf.getProperty("propertyName", "default value");
...

To obtain a modifiable Configuration instead it is possible to use the copy() method.
One of the Apache Any23 constructors accepts a Configuration object that allows to customize the behavior of the Apache Any23 instance for its entire life-cycle.

final ModifiableConfiguration modifiableConf = DefaultConfiguration.copy();
final String oldPropertyValue = modifiableConf.setProperty("propertyName", "new property value");
final Apache Any23 any23 = new Apache Any23(modifiableConf, "extractor1", ...);
...