Jian Li | 7c4a882 | 2020-12-21 11:25:12 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2020-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.kubevirtnode.util; |
| 17 | |
| 18 | import com.fasterxml.jackson.databind.ObjectMapper; |
Jian Li | c460430 | 2020-12-25 02:24:16 +0900 | [diff] [blame^] | 19 | import org.apache.commons.lang.StringUtils; |
| 20 | import org.onlab.packet.IpAddress; |
| 21 | import org.onosproject.kubevirtnode.api.KubevirtApiConfig; |
Jian Li | 7c4a882 | 2020-12-21 11:25:12 +0900 | [diff] [blame] | 22 | import org.slf4j.Logger; |
| 23 | import org.slf4j.LoggerFactory; |
| 24 | |
| 25 | import java.io.IOException; |
| 26 | import java.util.List; |
| 27 | |
| 28 | /** |
| 29 | * An utility that used in KubeVirt node app. |
| 30 | */ |
| 31 | public final class KubevirtNodeUtil { |
| 32 | |
| 33 | private static final Logger log = LoggerFactory.getLogger(KubevirtNodeUtil.class); |
| 34 | |
| 35 | private static final String COLON_SLASH = "://"; |
| 36 | private static final String COLON = ":"; |
| 37 | |
| 38 | private static final int HEX_LENGTH = 16; |
| 39 | private static final String OF_PREFIX = "of:"; |
| 40 | private static final String ZERO = "0"; |
| 41 | |
| 42 | /** |
| 43 | * Prevents object installation from external. |
| 44 | */ |
| 45 | private KubevirtNodeUtil() { |
| 46 | } |
| 47 | |
| 48 | /** |
Jian Li | c460430 | 2020-12-25 02:24:16 +0900 | [diff] [blame^] | 49 | * Generates endpoint URL by referring to scheme, ipAddress and port. |
| 50 | * |
| 51 | * @param apiConfig kubernetes API config |
| 52 | * @return generated endpoint URL |
| 53 | */ |
| 54 | public static String endpoint(KubevirtApiConfig apiConfig) { |
| 55 | return endpoint(apiConfig.scheme(), apiConfig.ipAddress(), apiConfig.port()); |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Generates endpoint URL by referring to scheme, ipAddress and port. |
| 60 | * |
| 61 | * @param scheme scheme |
| 62 | * @param ipAddress IP address |
| 63 | * @param port port number |
| 64 | * @return generated endpoint URL |
| 65 | */ |
| 66 | public static String endpoint(KubevirtApiConfig.Scheme scheme, IpAddress ipAddress, int port) { |
| 67 | StringBuilder endpoint = new StringBuilder(); |
| 68 | String protocol = StringUtils.lowerCase(scheme.name()); |
| 69 | |
| 70 | endpoint.append(protocol); |
| 71 | endpoint.append(COLON_SLASH); |
| 72 | endpoint.append(ipAddress.toString()); |
| 73 | endpoint.append(COLON); |
| 74 | endpoint.append(port); |
| 75 | |
| 76 | return endpoint.toString(); |
| 77 | } |
| 78 | |
| 79 | /** |
Jian Li | 7c4a882 | 2020-12-21 11:25:12 +0900 | [diff] [blame] | 80 | * Generates a DPID (of:0000000000000001) from an index value. |
| 81 | * |
| 82 | * @param index index value |
| 83 | * @return generated DPID |
| 84 | */ |
| 85 | public static String genDpid(long index) { |
| 86 | if (index < 0) { |
| 87 | return null; |
| 88 | } |
| 89 | |
| 90 | String hexStr = Long.toHexString(index); |
| 91 | |
| 92 | StringBuilder zeroPadding = new StringBuilder(); |
| 93 | for (int i = 0; i < HEX_LENGTH - hexStr.length(); i++) { |
| 94 | zeroPadding.append(ZERO); |
| 95 | } |
| 96 | |
| 97 | return OF_PREFIX + zeroPadding.toString() + hexStr; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Generates string format based on the given string length list. |
| 102 | * |
| 103 | * @param stringLengths a list of string lengths |
| 104 | * @return string format (e.g., %-28s%-15s%-24s%-20s%-15s) |
| 105 | */ |
| 106 | public static String genFormatString(List<Integer> stringLengths) { |
| 107 | StringBuilder fsb = new StringBuilder(); |
| 108 | stringLengths.forEach(length -> { |
| 109 | fsb.append("%-"); |
| 110 | fsb.append(length); |
| 111 | fsb.append("s"); |
| 112 | }); |
| 113 | return fsb.toString(); |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Prints out the JSON string in pretty format. |
| 118 | * |
| 119 | * @param mapper Object mapper |
| 120 | * @param jsonString JSON string |
| 121 | * @return pretty formatted JSON string |
| 122 | */ |
| 123 | public static String prettyJson(ObjectMapper mapper, String jsonString) { |
| 124 | try { |
| 125 | Object jsonObject = mapper.readValue(jsonString, Object.class); |
| 126 | return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonObject); |
| 127 | } catch (IOException e) { |
| 128 | log.debug("Json string parsing exception caused by {}", e); |
| 129 | } |
| 130 | return null; |
| 131 | } |
| 132 | } |