/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdc.common.impl;

import java.io.File;

import org.apache.commons.jci.monitor.FilesystemAlterationMonitor;
import org.openecomp.sdc.common.api.ConfigurationSource;

/**
 * 
 * Save the
 * 
 * @author esofer
 *
 */
public class ExternalConfiguration {

	private static String appName;
	private static String appVersion;
	private static String configDir;
	private static ConfigurationSource configurationSource;

	private static FilesystemAlterationMonitor fam = null;

	private static ConfigFileChangeListener changeListener = new ConfigFileChangeListener();

	private static boolean enableReconfigure = true;

	public static String getAppName() {
		return appName;
	}

	public static void setAppName(String appName) {
		ExternalConfiguration.appName = appName;
	}

	public static String getAppVersion() {
		return appVersion;
	}

	public static void setAppVersion(String appVersion) {
		ExternalConfiguration.appVersion = appVersion;
	}

	public static String getConfigDir() {
		return configDir;
	}

	public static void setConfigDir(String configDir) {
		ExternalConfiguration.configDir = configDir;
	}

	public static ConfigurationSource getConfigurationSource() {
		return configurationSource;
	}

	public static void setConfigurationSource(ConfigurationSource configurationSource) {
		ExternalConfiguration.configurationSource = configurationSource;
	}

	public static ConfigFileChangeListener getChangeListener() {
		return changeListener;
	}

	public static void listenForChanges() {

		String watchingDir = configDir + File.separator + appName;
		if (enableReconfigure) {
			if (fam == null) {
				fam = new FilesystemAlterationMonitor();
				fam.setInterval(1000);
				fam.addListener(new File(watchingDir), changeListener);
				fam.start();
			}
		}
	}

	public static void stopListenForFileChanges() {
		if (enableReconfigure) {
			if (fam != null) {
				fam.stop();
				fam = null;
			}
		}
	}

}