001/* 002 * (C) Copyright 2017 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * bdelbosc 018 */ 019package org.nuxeo.ecm.platform.importer.mqueues.mqueues.internals; 020 021import org.nuxeo.ecm.platform.importer.mqueues.mqueues.MQOffset; 022import org.nuxeo.ecm.platform.importer.mqueues.mqueues.MQPartition; 023 024/** 025 * @since 9.1 026 */ 027public class MQOffsetImpl implements MQOffset { 028 protected MQPartition partition; 029 protected final long offset; 030 031 public MQOffsetImpl(MQPartition partition, long offset) { 032 this.partition = partition; 033 this.offset = offset; 034 } 035 036 public MQOffsetImpl(String name, int partition, long offset) { 037 this.partition = MQPartition.of(name, partition); 038 this.offset = offset; 039 } 040 041 @Override 042 public MQPartition partition() { 043 return partition; 044 } 045 046 @Override 047 public long offset() { 048 return offset; 049 } 050 051 @Override 052 public String toString() { 053 return String.format("%s:+%d", partition, offset); 054 } 055 056 @Override 057 public boolean equals(Object o) { 058 if (this == o) return true; 059 if (o == null || getClass() != o.getClass()) return false; 060 061 MQOffsetImpl offsetImpl = (MQOffsetImpl) o; 062 063 if (partition.equals(offsetImpl.partition)) return false; 064 return offset == offsetImpl.offset; 065 } 066 067 @Override 068 public int hashCode() { 069 int result = partition != null ? partition.hashCode() : 0; 070 result = 31 * result + (int) (offset ^ (offset >>> 32)); 071 return result; 072 } 073 074 @Override 075 public int compareTo(MQOffset o) { 076 if (this == o) return 0; 077 if (o == null || getClass() != o.getClass()) { 078 throw new IllegalArgumentException("Can not compare offsets with different classes"); 079 } 080 MQOffsetImpl offsetImpl = (MQOffsetImpl) o; 081 if (partition.equals(offsetImpl.partition)) { 082 throw new IllegalArgumentException("Can not compare offsets from different partitions"); 083 } 084 return (int) (offset - offsetImpl.offset); 085 } 086}