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Swirlds is a software platform designed to build fully-distributed applications that harness the power of the cloud without servers. Now you can develop applications with fairness in decision making, speed, trust and reliability, at a fraction of the cost of traditional server-based platforms.
/*
* Copyright (C) 2023 Hedera Hashgraph, LLC
*
* 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 com.swirlds.base.time;
import com.swirlds.base.time.internal.OSTime;
import edu.umd.cs.findbugs.annotations.NonNull;
import java.time.Instant;
/**
* An API for getting the time. All platform code should utilize this API instead of the raw standard
* java time APIs. This makes it much easier to simulate time in test environments.
*/
public interface Time {
/**
* A method that returns the time in nanoseconds. May not start at the epoch.
* Equivalent to {@link System#nanoTime()}.
*
* @return the current relative time in nanoseconds
*/
long nanoTime();
/**
* A method that returns the current time in milliseconds since the epoch. Equivalent to
* {@link System#currentTimeMillis()}.
*
* @return the current time since the epoch in milliseconds
*/
long currentTimeMillis();
/**
* Returns the current time, relative to the epoch. Equivalent to {@link Instant#now()}.
*
* @return the curren time relative to the epoch
*/
@NonNull
Instant now();
/**
* Returns a {@link Time} instance
*
* @return a {@link Time} instance
*/
@NonNull
static Time getCurrent() {
return OSTime.getInstance();
}
}