diff options
Diffstat (limited to 'app/src/main/java/org/onap/portalng/history/configuration/Errorhandler.java')
-rw-r--r-- | app/src/main/java/org/onap/portalng/history/configuration/Errorhandler.java | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/app/src/main/java/org/onap/portalng/history/configuration/Errorhandler.java b/app/src/main/java/org/onap/portalng/history/configuration/Errorhandler.java new file mode 100644 index 0000000..515935b --- /dev/null +++ b/app/src/main/java/org/onap/portalng/history/configuration/Errorhandler.java @@ -0,0 +1,95 @@ +/* + * + * Copyright (c) 2022. Deutsche Telekom AG + * + * Licensed 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. + * + * SPDX-License-Identifier: Apache-2.0 + * + * + */ + +package org.onap.portalng.history.configuration; + +import com.fasterxml.jackson.core.JsonProcessingException; +import com.fasterxml.jackson.databind.ObjectMapper; + +import org.onap.portalng.history.exception.ProblemException; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler; +import org.springframework.core.io.buffer.DataBufferFactory; +import org.springframework.http.HttpStatus; +import org.springframework.http.server.reactive.ServerHttpResponse; +import org.springframework.stereotype.Component; +import org.springframework.web.server.ServerWebExchange; +import org.zalando.problem.Problem; +import org.zalando.problem.Status; +import reactor.core.publisher.Mono; + +@Component +public class Errorhandler implements ErrorWebExceptionHandler { + + @Autowired + ObjectMapper objectMapper; + + /** + * Override the handle methode to implement custom error handling + * Set response status code to BAD REQUEST, set header content-type and fill the body with the Problem object along the API model + */ + @Override + public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) { + ServerHttpResponse httpResponse = exchange.getResponse(); + setResponseStatus(httpResponse, ex); + httpResponse.getHeaders().add("Content-Type", "application/problem+json"); + return httpResponse.writeWith(Mono.fromSupplier(() -> { + DataBufferFactory bufferFactory = httpResponse.bufferFactory(); + try { + return + (httpResponse.getStatusCode() == HttpStatus.INTERNAL_SERVER_ERROR) + ? httpResponse.bufferFactory().wrap(objectMapper.writeValueAsBytes(setProblemException(httpResponse, ex.getMessage()))) + : httpResponse.bufferFactory().wrap(objectMapper.writeValueAsBytes(ex)); + } catch (JsonProcessingException e) { + return bufferFactory.wrap(new byte[0]); + } + })); + } + + /** + * Set the response status + * @param httpResponse response which status code should be set + * @param ex throwable exception to identify the Problem class + */ + private void setResponseStatus(ServerHttpResponse httpResponse, Throwable ex) { + if (ex instanceof Problem) { + httpResponse.setStatusCode(HttpStatus.BAD_REQUEST); + } else { + httpResponse.setStatusCode(HttpStatus.INTERNAL_SERVER_ERROR); + } + } + + /** + * Build a problem exception and set the response status code to BAD REQUEST for every response + * @param httpResponse response which status code should be set + * @param message for the detail of the problem exception + * @return problem exception instance + */ + private ProblemException setProblemException(ServerHttpResponse httpResponse, String message){ + httpResponse.setStatusCode(HttpStatus.BAD_REQUEST); + return ProblemException.builder() + .status(Status.INTERNAL_SERVER_ERROR) + .title(Status.INTERNAL_SERVER_ERROR.getReasonPhrase()) + .detail(message) + .build(); + + } +} |