| /* |
| * 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; |
| |
| import java.util.UUID; |
| |
| import org.apache.jena.atlas.lib.Bytes; |
| import org.apache.jena.dboe.sys.LibUUID; |
| import org.apache.jena.shared.uuid.JenaUUID; |
| |
| /** {@link TxnId} based on a {@link UUID}. |
| */ |
| public class TxnIdUuid implements TxnId { |
| |
| static TxnIdUuid create() { |
| UUID id = JenaUUID.generate().asUUID(); // UUID.randomUUID() ; |
| return new TxnIdUuid(id); |
| } |
| |
| public static TxnIdUuid create(byte[] bytes) { |
| long mostSignificantBits = Bytes.getLong(bytes, 0); |
| long leastSignificantBits = Bytes.getLong(bytes, 8); |
| return new TxnIdUuid(mostSignificantBits, leastSignificantBits); |
| } |
| |
| private long mostSignificantBits; |
| private long leastSignificantBits; |
| private byte[] bytes = null; |
| private String name = null; |
| |
| /*package*/ TxnIdUuid(UUID id) { |
| mostSignificantBits = id.getMostSignificantBits(); |
| leastSignificantBits = id.getLeastSignificantBits(); |
| } |
| |
| /*package*/ TxnIdUuid(long mostSig, long leastSig) { |
| mostSignificantBits = mostSig; |
| leastSignificantBits = leastSig; |
| } |
| |
| @Override |
| public String name() { |
| if ( name == null ) |
| name = LibUUID.uuidToString(mostSignificantBits, leastSignificantBits); |
| return name; |
| } |
| |
| @Override |
| public byte[] bytes() { |
| if ( bytes == null ) |
| bytes = LibUUID.uuidAsBytes(mostSignificantBits, leastSignificantBits); |
| return bytes; |
| } |
| |
| @Override |
| public long runtime() { |
| // In type 1, the mostSignificantBits have the timestamp in it. |
| return mostSignificantBits; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + (int)(leastSignificantBits ^ (leastSignificantBits >>> 32)); |
| result = prime * result + (int)(mostSignificantBits ^ (mostSignificantBits >>> 32)); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if ( this == obj ) |
| return true; |
| if ( obj == null ) |
| return false; |
| if ( getClass() != obj.getClass() ) |
| return false; |
| TxnIdUuid other = (TxnIdUuid)obj; |
| if ( leastSignificantBits != other.leastSignificantBits ) |
| return false; |
| if ( mostSignificantBits != other.mostSignificantBits ) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| //return name(); |
| return String.format("[%04X]", mostSignificantBits&0xFFFF); |
| } |
| } |
| |