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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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package org.apache.cassandra.utils;
public interface MonotonicClockTranslation
{
/** accepts millis since epoch, returns nanoTime in the related clock */
public long fromMillisSinceEpoch(long currentTimeMillis);
/** accepts nanoTime in the related MonotinicClock, returns millis since epoch */
public long toMillisSinceEpoch(long nanoTime);
/** Nanoseconds of probable error in the translation */
public long error();
}