| /* |
| * Copyright 2014-present Open Networking Laboratory |
| * |
| * 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.net.device; |
| |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.store.Timestamp; |
| |
| /** |
| * Interface for a logical clock service that vends per device timestamps. |
| */ |
| public interface DeviceClockService { |
| |
| /** |
| * Checks if this service can issue Timestamp for specified device. |
| * |
| * @param deviceId device identifier. |
| * @return true if timestamp can be issued for specified device |
| */ |
| boolean isTimestampAvailable(DeviceId deviceId); |
| |
| /** |
| * Returns a new timestamp for the specified deviceId. |
| * |
| * @param deviceId device identifier. |
| * @return timestamp. |
| */ |
| Timestamp getTimestamp(DeviceId deviceId); |
| } |