DMDirc-Client/bundles/com.dmdirc.config.provider/src/main/java/com/dmdirc/config/provider/ConfigChangeListener.java

/*
 * Copyright (c) 2006-2017 DMDirc Developers
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
 * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.dmdirc.config.provider;

/**
 * Defines the method required for config change listeners.
 */
@FunctionalInterface
public interface ConfigChangeListener {

    /**
     * Called when a monitored config entry has been changed. Note that the values may be null if
     * the setting wasn't, or is no longer, set. Also note that the new value may not be the same as
     * you'd get returned from ConfigManager.getOption, as listeners are triggered for any change in
     * any of the manager's identities.
     *
     * @param domain The domain that was altered
     * @param key    The key that was altered
     */
    void configChanged(String domain, String key);

}