| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| ConfigurationObjectUtils |
|
| 0.0;0 |
| 1 | /* | |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one | |
| 3 | * or more contributor license agreements. See the NOTICE file | |
| 4 | * distributed with this work for additional information | |
| 5 | * regarding copyright ownership. The ASF licenses this file | |
| 6 | * to you under the Apache License, Version 2.0 (the | |
| 7 | * "License"); you may not use this file except in compliance | |
| 8 | * with the License. You may obtain a copy of the License at | |
| 9 | * | |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 11 | * | |
| 12 | * Unless required by applicable law or agreed to in writing, software | |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 15 | * See the License for the specific language governing permissions and | |
| 16 | * limitations under the License. | |
| 17 | */ | |
| 18 | package org.apache.giraph.utils; | |
| 19 | ||
| 20 | import org.apache.giraph.writable.kryo.KryoWritableWrapper; | |
| 21 | import org.apache.hadoop.conf.Configuration; | |
| 22 | ||
| 23 | /** | |
| 24 | * Utility methods for dealing with Hadoop configuration | |
| 25 | */ | |
| 26 | public class ConfigurationObjectUtils { | |
| 27 | /** Hide constructor */ | |
| 28 | 0 | private ConfigurationObjectUtils() { |
| 29 | 0 | } |
| 30 | ||
| 31 | /** | |
| 32 | * Encode bytes to a hex String | |
| 33 | * | |
| 34 | * @param bytes byte[] | |
| 35 | * @return encoded String | |
| 36 | */ | |
| 37 | public static String encodeBytes(byte[] bytes) { | |
| 38 | 0 | StringBuilder strBuf = new StringBuilder(); |
| 39 | 0 | for (int i = 0; i < bytes.length; i++) { |
| 40 | 0 | strBuf.append((char) (((bytes[i] >> 4) & 0xF) + ('a'))); |
| 41 | 0 | strBuf.append((char) (((bytes[i]) & 0xF) + ('a'))); |
| 42 | } | |
| 43 | 0 | return strBuf.toString(); |
| 44 | } | |
| 45 | ||
| 46 | /** | |
| 47 | * Decode bytes from a hex String | |
| 48 | * | |
| 49 | * @param str String to decode | |
| 50 | * @return decoded byte[] | |
| 51 | */ | |
| 52 | public static byte[] decodeBytes(String str) { | |
| 53 | 0 | byte[] bytes = new byte[str.length() / 2]; |
| 54 | 0 | for (int i = 0; i < str.length(); i += 2) { |
| 55 | 0 | char c = str.charAt(i); |
| 56 | 0 | bytes[i / 2] = (byte) ((c - 'a') << 4); |
| 57 | 0 | c = str.charAt(i + 1); |
| 58 | 0 | bytes[i / 2] += c - 'a'; |
| 59 | } | |
| 60 | 0 | return bytes; |
| 61 | } | |
| 62 | ||
| 63 | /** | |
| 64 | * Set byte array to a conf option | |
| 65 | * | |
| 66 | * @param data Byte array | |
| 67 | * @param confOption Conf option | |
| 68 | * @param conf Configuration | |
| 69 | */ | |
| 70 | public static void setByteArray(byte[] data, String confOption, | |
| 71 | Configuration conf) { | |
| 72 | 0 | conf.set(confOption, encodeBytes(data)); |
| 73 | 0 | } |
| 74 | ||
| 75 | /** | |
| 76 | * Get byte array from a conf option | |
| 77 | * | |
| 78 | * @param confOption Conf option | |
| 79 | * @param conf Configuration | |
| 80 | * @return Byte array | |
| 81 | */ | |
| 82 | public static byte[] getByteArray(String confOption, | |
| 83 | Configuration conf) { | |
| 84 | 0 | return decodeBytes(conf.get(confOption)); |
| 85 | } | |
| 86 | ||
| 87 | /** | |
| 88 | * Set object in a conf option using kryo | |
| 89 | * | |
| 90 | * @param object Object to set | |
| 91 | * @param confOption Conf option | |
| 92 | * @param conf Configuration | |
| 93 | * @param <T> Type of the object | |
| 94 | */ | |
| 95 | public static <T> void setObjectKryo(T object, String confOption, | |
| 96 | Configuration conf) { | |
| 97 | 0 | setByteArray(WritableUtils.toByteArrayUnsafe( |
| 98 | new KryoWritableWrapper<>(object)), | |
| 99 | confOption, conf); | |
| 100 | 0 | } |
| 101 | ||
| 102 | /** | |
| 103 | * Get object from a conf option using kryo | |
| 104 | * | |
| 105 | * @param confOption Conf option | |
| 106 | * @param conf Configuration | |
| 107 | * @return Object from conf | |
| 108 | * @param <T> Type of the object | |
| 109 | */ | |
| 110 | public static <T> T getObjectKryo(String confOption, | |
| 111 | Configuration conf) { | |
| 112 | 0 | KryoWritableWrapper<T> wrapper = new KryoWritableWrapper<>(); |
| 113 | 0 | WritableUtils.fromByteArrayUnsafe( |
| 114 | 0 | getByteArray(confOption, conf), wrapper, |
| 115 | new UnsafeReusableByteArrayInput()); | |
| 116 | 0 | return wrapper.get(); |
| 117 | } | |
| 118 | } |