| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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 org.onosproject.core; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Time provided by a Hybrid Logical Clock described in |
| * this <a href="http://www.cse.buffalo.edu/tech-reports/2014-04.pdf">paper</a>. |
| */ |
| public class HybridLogicalTime { |
| private final long logicalTime; |
| private final long logicalCounter; |
| |
| public HybridLogicalTime(long logicalTime, long logicalCounter) { |
| this.logicalTime = logicalTime; |
| this.logicalCounter = logicalCounter; |
| } |
| |
| /** |
| * Returns the logical time component of a HLT. |
| * @return logical time |
| */ |
| public long logicalTime() { |
| return logicalTime; |
| } |
| |
| /** |
| * Returns the logical counter component of a HLT. |
| * @return logical counter |
| */ |
| public long logicalCounter() { |
| return logicalCounter; |
| } |
| |
| /** |
| * Returns the real system time represented by this HLT. |
| * @return real system time |
| */ |
| public long time() { |
| return (logicalTime >> 16 << 16) | (logicalCounter << 48 >> 48); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("logicalTime", logicalTime) |
| .add("logicalCounter", logicalCounter) |
| .toString(); |
| } |
| } |