Examples with ConfigurationBuilderEvent org.apache.commons.configuration2.builder.ConfigurationBuilderEvent used on opensource projects

Example 1 with ConfigurationBuilderEvent

use of org.apache.commons.configuration2.builder.ConfigurationBuilderEvent in project nifi by apache.

the class CommonsConfigurationLookupService method onEnabled.

@OnEnabled
public void onEnabled(final ConfigurationContext context) throws InitializationException {
    final String config = context.getProperty(CONFIGURATION_FILE).getValue();
    final FileBasedBuilderParameters params = new Parameters().fileBased().setFile(new File(config));
    this.builder = new ReloadingFileBasedConfigurationBuilder<>(resultClass).configure(params);
    builder.addEventListener(ConfigurationBuilderEvent.CONFIGURATION_REQUEST, new EventListener<ConfigurationBuilderEvent>() {

        @Override
        public void onEvent(ConfigurationBuilderEvent event) {
            if (builder.getReloadingController().checkForReloading(null)) {
                getLogger().debug("Reloading " + config);
            }
        }
    });
    try {
        // Try getting configuration to see if there is any issue, for example wrong file format.
        // Then throw InitializationException to keep this service in 'Enabling' state.
        builder.getConfiguration();
    } catch (ConfigurationException e) {
        throw new InitializationException(e);
    }
}