| /* |
| * Copyright 2008 Niclas Hedhman. All rights Reserved. |
| * |
| * 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.apache.zest.library.uid.sequence; |
| |
| /** |
| * Sequencing is used to automatically generate a sequence of numbers. |
| * The algorithm is that <code>currentSequenceValue</code> is the number that was last returned |
| * in a <code>newSequenceValue</code> call, and will initially be zero. Persisting Sequencing |
| * services defines "initially" as the first run ever, as subsequent starts may retrieve the |
| * <code>currentSequenceValue</code> from an <code>EntityStore</code> |
| */ |
| public interface Sequencing |
| { |
| Long newSequenceValue() |
| throws SequencingException; |
| |
| Long currentSequenceValue(); |
| } |