RafaĆ Szalecki | de5cf84 | 2018-11-17 13:30:01 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018-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.net.config.basics; |
| 17 | |
| 18 | import com.fasterxml.jackson.core.JsonProcessingException; |
| 19 | import com.fasterxml.jackson.databind.JsonNode; |
| 20 | import com.fasterxml.jackson.databind.ObjectMapper; |
| 21 | import com.fasterxml.jackson.databind.node.ObjectNode; |
| 22 | import org.onosproject.net.HostId; |
| 23 | import org.onosproject.net.config.BaseConfig; |
| 24 | import org.onosproject.net.config.InvalidFieldException; |
| 25 | import org.slf4j.Logger; |
| 26 | |
| 27 | import java.util.HashMap; |
| 28 | import java.util.Map; |
| 29 | |
| 30 | import static org.slf4j.LoggerFactory.getLogger; |
| 31 | |
| 32 | /** |
| 33 | * Configuration to add extra annotations to a host via netcfg subsystem. |
| 34 | */ |
| 35 | public class HostAnnotationConfig |
| 36 | extends BaseConfig<HostId> { |
| 37 | |
| 38 | /** |
| 39 | * {@value #CONFIG_KEY} : a netcfg ConfigKey for {@link HostAnnotationConfig}. |
| 40 | */ |
| 41 | public static final String CONFIG_KEY = "annotations"; |
| 42 | |
| 43 | /** |
| 44 | * JSON key for annotation entries. |
| 45 | * Value is a String. |
| 46 | */ |
| 47 | private static final String ENTRIES = "entries"; |
| 48 | |
| 49 | private final Logger log = getLogger(getClass()); |
| 50 | |
| 51 | private static final int KEY_MAX_LENGTH = 1024; |
| 52 | private static final int VALUE_MAX_LENGTH = 1024; |
| 53 | |
| 54 | @Override |
| 55 | public boolean isValid() { |
| 56 | JsonNode jsonNode = object.path(ENTRIES); |
| 57 | if (jsonNode.isObject()) { |
| 58 | jsonNode.fields().forEachRemaining(entry -> { |
| 59 | if (entry.getKey().length() > KEY_MAX_LENGTH) { |
| 60 | throw new InvalidFieldException(entry.getKey(), |
| 61 | entry.getKey() + " exceeds maximum length " + KEY_MAX_LENGTH); |
| 62 | } |
| 63 | if (entry.getValue().asText("").length() > VALUE_MAX_LENGTH) { |
| 64 | throw new InvalidFieldException(entry.getKey(), |
| 65 | entry.getKey() + " exceeds maximum length " + VALUE_MAX_LENGTH); |
| 66 | } |
| 67 | }); |
| 68 | } |
| 69 | return hasField(ENTRIES) && object.get(ENTRIES).isObject(); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Returns annotations to add to a Host. |
| 74 | * |
| 75 | * @return annotations as a map. null value represent key removal request |
| 76 | */ |
| 77 | public Map<String, String> annotations() { |
| 78 | Map<String, String> map = new HashMap<>(); |
| 79 | |
| 80 | JsonNode jsonNode = object.path(ENTRIES); |
| 81 | if (!jsonNode.isObject()) { |
| 82 | return map; |
| 83 | } |
| 84 | |
| 85 | jsonNode.fields().forEachRemaining(entry -> { |
| 86 | String key = entry.getKey(); |
| 87 | JsonNode value = entry.getValue(); |
| 88 | if (value.isTextual()) { |
| 89 | map.put(key, value.asText()); |
| 90 | } else if (value.isNull()) { |
| 91 | map.put(key, null); |
| 92 | } else { |
| 93 | try { |
| 94 | map.put(key, mapper().writeValueAsString(value)); |
| 95 | } catch (JsonProcessingException e) { |
| 96 | log.warn("Error processing JSON value for {}.", key, e); |
| 97 | } |
| 98 | } |
| 99 | }); |
| 100 | return map; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Sets annotations to add to a Host. |
| 105 | * |
| 106 | * @param replace annotations to be added by this configuration. |
| 107 | * null value represent key removal request |
| 108 | * @return self |
| 109 | */ |
| 110 | public HostAnnotationConfig annotations(Map<String, String> replace) { |
| 111 | ObjectNode anns = object.objectNode(); |
| 112 | if (replace != null) { |
| 113 | replace.forEach(anns::put); |
| 114 | } |
| 115 | object.set(ENTRIES, anns); |
| 116 | return this; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Add configuration to set or remove annotation entry. |
| 121 | * |
| 122 | * @param key annotations key |
| 123 | * @param value annotations value. specifying null removes the entry. |
| 124 | * @return self |
| 125 | */ |
| 126 | public HostAnnotationConfig annotation(String key, String value) { |
| 127 | JsonNode ent = object.path(ENTRIES); |
| 128 | ObjectNode obj = (ent.isObject()) ? (ObjectNode) ent : object.objectNode(); |
| 129 | |
| 130 | obj.put(key, value); |
| 131 | |
| 132 | object.set(ENTRIES, obj); |
| 133 | return this; |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * Remove configuration about specified key. |
| 138 | * |
| 139 | * @param key annotations key |
| 140 | * @return self |
| 141 | */ |
| 142 | public HostAnnotationConfig annotation(String key) { |
| 143 | JsonNode ent = object.path(ENTRIES); |
| 144 | ObjectNode obj = (ent.isObject()) ? (ObjectNode) ent : object.objectNode(); |
| 145 | |
| 146 | obj.remove(key); |
| 147 | |
| 148 | object.set(ENTRIES, obj); |
| 149 | return this; |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Create a detached {@link HostAnnotationConfig}. |
| 154 | * <p> |
| 155 | * Note: created instance needs to be initialized by #init(..) before using. |
| 156 | */ |
| 157 | public HostAnnotationConfig() { |
| 158 | super(); |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Create a detached {@link HostAnnotationConfig} for specified host. |
| 163 | * <p> |
| 164 | * Note: created instance is not bound to NetworkConfigService, |
| 165 | * thus cannot use {@link #apply()}. Must be passed to the service |
| 166 | * using NetworkConfigService#applyConfig |
| 167 | * |
| 168 | * @param hostId Host id |
| 169 | */ |
| 170 | public HostAnnotationConfig(HostId hostId) { |
| 171 | ObjectMapper mapper = new ObjectMapper(); |
| 172 | init(hostId, CONFIG_KEY, mapper.createObjectNode(), mapper, null); |
| 173 | } |
| 174 | } |