/*
 * Copyright (c) 2017, 2018 Oracle and/or its affiliates. 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.
 */

package io.helidon.config.examples.changes;

import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;

/**
 * Config changes examples.
 */
public class Main {

    private static final Logger LOGGER = Logger.getLogger(Main.class.getName());

    private Main() {
    }

    /**
     * Executes the example.
     *
     * @param args arguments
     * @throws InterruptedException in case you cannot sleep
     * @throws IOException          in case of IO error
     */
    public static void main(String... args) throws IOException, InterruptedException {
        // subscribe on config changes using custom Flow.Subscriber
        new ChangesSubscriberExample().run();
        // subscribe using simple onChange function
        new OnChangeExample().run();
        // use same Supplier instances to get up-to-date value
        AsSupplierExample asSupplier = new AsSupplierExample();
        asSupplier.run();

        // waiting for user made changes in config files
        long sleep = 60;
        LOGGER.info("Application is waiting " + sleep + " seconds for change...");
        TimeUnit.SECONDS.sleep(sleep);

        asSupplier.shutdown();
        LOGGER.info("Goodbye.");
    }

}
