| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * 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 |
| * 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.jena.dboe.transaction.txn; |
| |
| /** |
| * Generator of {@link TxnId}s. |
| * {@code TxnId} is a identifier for a transaction. |
| * A component in a transaction can use it as a unique key. |
| * The {@code TxnId} |
| * <ul> |
| * <li>must be unique across a JVM run |
| * <li>unique across JVm runs if used as a persistent name |
| * <li>Must provide value equality semantics (two {@code TxnId} are {@code .equals} |
| * if |
| * </ul> |
| * <p> |
| * It is preferrable that the TxnId is global unique over time and space. |
| */ |
| public interface TxnIdGenerator { |
| public TxnId generate(); |
| } |
| |
