| /** |
| * 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.hadoop.yarn.server.timelineservice.storage.common; |
| |
| import java.io.IOException; |
| import java.io.Serializable; |
| |
| import org.apache.hadoop.hbase.util.Bytes; |
| |
| /** |
| * Encodes a value by interpreting it as a Long and converting it to bytes and |
| * decodes a set of bytes as a Long. |
| */ |
| public final class LongConverter implements NumericValueConverter, |
| Serializable { |
| |
| /** |
| * Added because we implement Comparator<Number>. |
| */ |
| private static final long serialVersionUID = 1L; |
| |
| public LongConverter() { |
| } |
| |
| @Override |
| public byte[] encodeValue(Object value) throws IOException { |
| if (!HBaseTimelineSchemaUtils.isIntegralValue(value)) { |
| throw new IOException("Expected integral value"); |
| } |
| return Bytes.toBytes(((Number)value).longValue()); |
| } |
| |
| @Override |
| public Object decodeValue(byte[] bytes) throws IOException { |
| if (bytes == null) { |
| return null; |
| } |
| return Bytes.toLong(bytes); |
| } |
| |
| /** |
| * Compares two numbers as longs. If either number is null, it will be taken |
| * as 0. |
| * |
| * @param num1 the first {@code Long} to compare. |
| * @param num2 the second {@code Long} to compare. |
| * @return -1 if num1 is less than num2, 0 if num1 is equal to num2 and 1 if |
| * num1 is greater than num2. |
| */ |
| @Override |
| public int compare(Number num1, Number num2) { |
| return Long.compare((num1 == null) ? 0L : num1.longValue(), |
| (num2 == null) ? 0L : num2.longValue()); |
| } |
| |
| @Override |
| public Number add(Number num1, Number num2, Number...numbers) { |
| long sum = ((num1 == null) ? 0L : num1.longValue()) + |
| ((num2 == null) ? 0L : num2.longValue()); |
| for (Number num : numbers) { |
| sum = sum + ((num == null) ? 0L : num.longValue()); |
| } |
| return sum; |
| } |
| |
| /** |
| * Converts a timestamp into it's inverse timestamp to be used in (row) keys |
| * where we want to have the most recent timestamp in the top of the table |
| * (scans start at the most recent timestamp first). |
| * |
| * @param key value to be inverted so that the latest version will be first in |
| * a scan. |
| * @return inverted long |
| */ |
| public static long invertLong(long key) { |
| return Long.MAX_VALUE - key; |
| } |
| } |