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Azkarra Streams Core API

There is a newer version: 0.9.2

/*
 * Copyright 2019-2020 StreamThoughts.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.streamthoughts.azkarra.api.time;

import java.time.Duration;
import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;

public interface Time {

    DateTimeFormatter DTF = DateTimeFormatter.ISO_DATE_TIME;

    Time SYSTEM = new SystemTime();

    static String toISODate() {
        return toISODate(SYSTEM.milliseconds());
    }

    static String toISODate(final long epochTime) {
        return toISODate(epochTime, ZoneId.systemDefault());
    }

    static String toISODate(final long epochTime, final ZoneId zoneId) {
        return DTF.withZone(zoneId)
                .format(Instant.ofEpochMilli(epochTime));
    }


    /**
     * Returns the current time in milliseconds.
     */
    long milliseconds();

    /**
     * Returns the current value of the running JVM's high-resolution time source, in nanoseconds.
     */
    long nanoseconds();

    void sleep(final Duration duration);
}