Sean Condon | 13b1681 | 2018-01-25 10:31:49 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2017-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.restconf.api; |
| 17 | |
| 18 | import com.fasterxml.jackson.databind.ObjectMapper; |
| 19 | import com.fasterxml.jackson.databind.node.ArrayNode; |
| 20 | import com.fasterxml.jackson.databind.node.ObjectNode; |
| 21 | |
| 22 | import java.util.List; |
| 23 | |
| 24 | /** |
| 25 | * Restconf error structured as in "ietf-restconf@2017-01-26.yang". |
| 26 | * An entry containing information about one specific error that occurred while |
| 27 | * processing a RESTCONF request. |
| 28 | */ |
| 29 | public final class RestconfError { |
| 30 | private final ErrorType errorType; |
| 31 | private final ErrorTag errorTag; |
| 32 | private String errorAppTag; |
| 33 | private String errorPath; |
| 34 | private String errorMessage; |
| 35 | private String errorInfo; |
| 36 | |
| 37 | private RestconfError(ErrorType errorType, ErrorTag errorTag) { |
| 38 | this.errorType = errorType; |
| 39 | this.errorTag = errorTag; |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * The protocol layer where the error occurred. |
| 44 | * @return The error type |
| 45 | */ |
| 46 | public ErrorType getErrorType() { |
| 47 | return errorType; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * The enumerated error-tag. |
| 52 | * @return The enumerated error-tag |
| 53 | */ |
| 54 | public ErrorTag getErrorTag() { |
| 55 | return errorTag; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * The application-specific error-tag. |
| 60 | * @return The application-specific error-tag |
| 61 | */ |
| 62 | public String getErrorAppTag() { |
| 63 | return errorAppTag; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * The YANG instance identifier associated with the error node. |
| 68 | * @return A yang instance represented in XPath |
| 69 | */ |
| 70 | public String getErrorPath() { |
| 71 | return errorPath; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * A message describing the error. |
| 76 | * @return A message describing the error |
| 77 | */ |
| 78 | public String getErrorMessage() { |
| 79 | return errorMessage; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * A container with zero or more data nodes representing additional error information. |
| 84 | * @return A string serialization of datanodes e.g. a stack trace |
| 85 | */ |
| 86 | public String getErrorInfo() { |
| 87 | return errorInfo; |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Convert the restconf error to Json - this is for one error - many may be included in a response. |
| 92 | * @return A JSON object containing the details of one error |
| 93 | */ |
| 94 | public ObjectNode toJson() { |
| 95 | ObjectMapper mapper = new ObjectMapper(); |
| 96 | ObjectNode errorTags = (ObjectNode) mapper.createObjectNode(); |
| 97 | errorTags.put("error-type", errorType.name().toLowerCase()); |
| 98 | errorTags.put("error-tag", errorTag.text()); |
| 99 | |
| 100 | if (errorAppTag != null) { |
| 101 | errorTags.put("error-app-tag", errorAppTag); |
| 102 | } |
| 103 | |
| 104 | if (errorPath != null) { |
| 105 | errorTags.put("error-path", errorPath); |
| 106 | } |
| 107 | |
| 108 | if (errorMessage != null) { |
| 109 | errorTags.put("error-message", errorMessage); |
| 110 | } |
| 111 | |
| 112 | if (errorInfo != null) { |
| 113 | errorTags.put("error-info", errorInfo); |
| 114 | } |
| 115 | |
| 116 | ObjectNode errorNode = (ObjectNode) mapper.createObjectNode(); |
| 117 | errorNode.put("error", errorTags); |
| 118 | return errorNode; |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * An enumerated set of the protocol layer involved in a RESTCONF request. |
| 123 | */ |
| 124 | public enum ErrorType { |
| 125 | //The transport layer |
| 126 | TRANSPORT, |
| 127 | //The rpc or notification layer |
| 128 | RPC, |
| 129 | //The protocol operation layer |
| 130 | PROTOCOL, |
| 131 | //The server application layer |
| 132 | APPLICATION |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * An enumerated set of error 'tags' - consistent labels for error causes. |
| 137 | * See <a href="https://tools.ietf.org/html/rfc8040#section-7">Section 7 of RFC 8040</a> |
| 138 | * for a list of HTTP status codes associated with these |
| 139 | * error tags. Developers should ensure that suitable HTTP status codes are used |
| 140 | * when raising RESTCONF errors |
| 141 | */ |
| 142 | public enum ErrorTag { |
| 143 | /** |
| 144 | * Use with Response 409 {@link javax.ws.rs.core.Response.Status#CONFLICT}. |
| 145 | */ |
| 146 | IN_USE("in-use"), |
| 147 | /** |
| 148 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}, |
| 149 | * 404 {@link javax.ws.rs.core.Response.Status#NOT_FOUND} or |
| 150 | * 406 {@link javax.ws.rs.core.Response.Status#NOT_ACCEPTABLE}. |
| 151 | */ |
| 152 | INVALID_VALUE("invalid-value"), |
| 153 | /** |
| 154 | * Use with Response 413 {@link javax.ws.rs.core.Response.Status#REQUEST_ENTITY_TOO_LARGE}. |
| 155 | */ |
| 156 | REQUEST_TOO_BIG("too-big"), |
| 157 | /** |
| 158 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}. |
| 159 | */ |
| 160 | RESPONSE_TOO_BIG("too-big"), |
| 161 | /** |
| 162 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}. |
| 163 | */ |
| 164 | MISSING_ATTRIBUTE("missing-attribute"), |
| 165 | /** |
| 166 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}. |
| 167 | */ |
| 168 | BAD_ATTRIBUTE("bad-attribute"), |
| 169 | /** |
| 170 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}. |
| 171 | */ |
| 172 | UNKNOWN_ATTRIBUTE("unknown-attribute"), |
| 173 | /** |
| 174 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}. |
| 175 | */ |
| 176 | BAD_ELEMENT("bad-element"), |
| 177 | /** |
| 178 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}. |
| 179 | */ |
| 180 | UNKNOWN_ELEMENT("unknown-element"), |
| 181 | /** |
| 182 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}. |
| 183 | */ |
| 184 | UNKNOWN_NAMESPACE("unknown-namespace"), |
| 185 | /** |
| 186 | * Use with Response 401 {@link javax.ws.rs.core.Response.Status#UNAUTHORIZED}, |
| 187 | * or 403 {@link javax.ws.rs.core.Response.Status#FORBIDDEN}. |
| 188 | */ |
| 189 | ACCESS_DENIED("access-denied"), |
| 190 | /** |
| 191 | * Use with Response 409 {@link javax.ws.rs.core.Response.Status#CONFLICT}. |
| 192 | */ |
| 193 | LOCK_DENIED("lock-denied"), |
| 194 | /** |
| 195 | * Use with Response 409 {@link javax.ws.rs.core.Response.Status#CONFLICT}. |
| 196 | */ |
| 197 | RESOURCE_DENIED("resource-denied"), |
| 198 | /** |
| 199 | * Use with Response 500 {@link javax.ws.rs.core.Response.Status#INTERNAL_SERVER_ERROR}. |
| 200 | */ |
| 201 | ROLLBACK_FAILED("rollback-failed"), |
| 202 | /** |
| 203 | * Use with Response 409 {@link javax.ws.rs.core.Response.Status#CONFLICT}. |
| 204 | */ |
| 205 | DATA_EXISTS("data-exists"), |
| 206 | /** |
| 207 | * Use with Response 409 {@link javax.ws.rs.core.Response.Status#CONFLICT}. |
| 208 | */ |
| 209 | DATA_MISSING("data-missing"), |
| 210 | /** |
| 211 | * Use with Response 405 {@link javax.ws.rs.core.Response.Status#METHOD_NOT_ALLOWED}, |
| 212 | * or 501 {@link javax.ws.rs.core.Response.Status#NOT_IMPLEMENTED}. |
| 213 | */ |
| 214 | OPERATION_NOT_SUPPORTED("operation-not-supported"), |
| 215 | /** |
| 216 | * Use with Response 412 {@link javax.ws.rs.core.Response.Status#PRECONDITION_FAILED}, |
| 217 | * or 500 {@link javax.ws.rs.core.Response.Status#INTERNAL_SERVER_ERROR}. |
| 218 | */ |
| 219 | OPERATION_FAILED("operation-failed"), |
| 220 | /** |
| 221 | * Use with Response 500 {@link javax.ws.rs.core.Response.Status#INTERNAL_SERVER_ERROR}. |
| 222 | */ |
| 223 | PARTIAL_OPERATION("partial-operation"), |
| 224 | /** |
| 225 | * Use with Response 400 {@link javax.ws.rs.core.Response.Status#BAD_REQUEST}. |
| 226 | */ |
| 227 | MALFORMED_MESSAGE("malformed-message"); |
| 228 | |
| 229 | private String text; |
| 230 | |
| 231 | ErrorTag(String text) { |
| 232 | this.text = text; |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * Lowercase version of the error tag compliant with the standard. |
| 237 | * @return the associated lowercase version |
| 238 | */ |
| 239 | public String text() { |
| 240 | return text; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Build a new RestconfError. ErrorTag and ErrorType are mandatory parameters. |
| 246 | * @param errorType The error type |
| 247 | * @param errorTag The error Tag |
| 248 | * @return A build which an be used to create the RestconfError |
| 249 | */ |
| 250 | public static RestconfError.Builder builder(ErrorType errorType, ErrorTag errorTag) { |
| 251 | return new Builder(errorType, errorTag); |
| 252 | } |
| 253 | |
| 254 | /** |
| 255 | * Create the complete JSON representation of the errors for the Response. |
| 256 | * Note this can contain many individual RestconfErrors |
| 257 | * @param restconfErrors A list of {@link RestconfError}s |
| 258 | * @return A JSON node which can be used in a response |
| 259 | */ |
| 260 | public static ObjectNode wrapErrorAsJson(List<RestconfError> restconfErrors) { |
| 261 | ObjectMapper mapper = new ObjectMapper(); |
| 262 | ArrayNode errorArray = mapper.createArrayNode(); |
| 263 | restconfErrors.forEach(error -> errorArray.add(error.toJson())); |
| 264 | ObjectNode errorsNode = (ObjectNode) mapper.createObjectNode(); |
| 265 | errorsNode.put("ietf-restconf:errors", errorArray); |
| 266 | return errorsNode; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * A builder for the Restconf Error. ErrorTag and ErrorType are mandatory parameters. |
| 271 | */ |
| 272 | public static final class Builder { |
| 273 | private RestconfError restconfError; |
| 274 | |
| 275 | /** |
| 276 | * ErrorTag and ErrorType are mandatory parameters of the error. |
| 277 | * @param errorType The error-type |
| 278 | * @param errorTag The error-tag |
| 279 | */ |
| 280 | private Builder(ErrorType errorType, ErrorTag errorTag) { |
| 281 | restconfError = new RestconfError(errorType, errorTag); |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * Set an error-app-tag on the error. |
| 286 | * @param errorAppTag a tag relevant to the error in the application |
| 287 | * @return The builder |
| 288 | */ |
| 289 | public Builder errorAppTag(String errorAppTag) { |
| 290 | this.restconfError.errorAppTag = errorAppTag; |
| 291 | return this; |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Set an error-path on the error. |
| 296 | * @param errorPath A path to the resource that caused the error |
| 297 | * @return The builder |
| 298 | */ |
| 299 | public Builder errorPath(String errorPath) { |
| 300 | this.restconfError.errorPath = errorPath; |
| 301 | return this; |
| 302 | } |
| 303 | |
| 304 | /** |
| 305 | * Set an error-message on the error. |
| 306 | * @param errorMessage an explaination of the error |
| 307 | * @return The builder |
| 308 | */ |
| 309 | public Builder errorMessage(String errorMessage) { |
| 310 | this.restconfError.errorMessage = errorMessage; |
| 311 | return this; |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * Set an error-info on the error. |
| 316 | * @param errorInfo Any additional infor about the error |
| 317 | * @return The builder |
| 318 | */ |
| 319 | public Builder errorInfo(String errorInfo) { |
| 320 | this.restconfError.errorInfo = errorInfo; |
| 321 | return this; |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * Build the contents of the builder in to a {@link RestconfError}. |
| 326 | * @return A RestconfError |
| 327 | */ |
| 328 | public RestconfError build() { |
| 329 | return restconfError; |
| 330 | } |
| 331 | } |
| 332 | } |