common/src/main/java/org/onap/so/client/ResponseExceptionMapper.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP - SO
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.so.client;
  22
  23 import java.io.IOException;
  24 import java.io.InputStream;
  25 import java.io.StringWriter;
  26 import java.util.Optional;
  27
  28 import javax.ws.rs.BadRequestException;
  29 import javax.ws.rs.ForbiddenException;
  30 import javax.ws.rs.InternalServerErrorException;
  31 import javax.ws.rs.NotAcceptableException;
  32 import javax.ws.rs.NotAllowedException;
  33 import javax.ws.rs.NotAuthorizedException;
  34 import javax.ws.rs.NotFoundException;
  35 import javax.ws.rs.NotSupportedException;
  36 import javax.ws.rs.WebApplicationException;
  37 import javax.ws.rs.core.Response;
  38
  39 import org.apache.commons.io.IOUtils;
  40
  41 public abstract class ResponseExceptionMapper {
  42
  43         public void map(Response response) {
  44
  45                 response.bufferEntity();
  46                 if (response.getStatus() >= 300) {
  47                         String message = "empty message";
  48                         if (response.hasEntity()) {
  49                                 StringWriter writer = new StringWriter();
  50                                 try {
  51                                         IOUtils.copy((InputStream)response.getEntity(), writer, "UTF-8");
  52                                 } catch (IOException e) {
  53                                         writer.append("failed to read entity stream");
  54                                 }
  55                                 Optional<String> result = this.extractMessage(writer.toString());
  56                                 if (result.isPresent()) {
  57                                         message = result.get();
  58                                 }
  59                         }
  60                         Response.Status status = Response.Status.fromStatusCode(response.getStatus());
  61                         WebApplicationException webAppException;
  62                         switch (status) {
  63                         case BAD_REQUEST:
  64                                 webAppException = new BadRequestException(message);
  65                                 break;
  66                         case UNAUTHORIZED:
  67                                 webAppException = new NotAuthorizedException(message);
  68                                 break;
  69                         case FORBIDDEN:
  70                                 webAppException = new ForbiddenException(message);
  71                                 break;
  72                         case NOT_FOUND:
  73                                 webAppException = new NotFoundException(message);
  74                                 break;
  75                         case METHOD_NOT_ALLOWED:
  76                                 webAppException = new NotAllowedException(message);
  77                                 break;
  78                         case NOT_ACCEPTABLE:
  79                                 webAppException = new NotAcceptableException(message);
  80                                 break;
  81                         case PRECONDITION_FAILED:
  82                                 webAppException = new PreconditionFailedException(message);
  83                                 break;
  84                         case UNSUPPORTED_MEDIA_TYPE:
  85                                 webAppException = new NotSupportedException(message);
  86                                 break;
  87                         case INTERNAL_SERVER_ERROR:
  88                                 webAppException = new InternalServerErrorException(message);
  89                                 break;
  90                         case SERVICE_UNAVAILABLE:
  91                                 webAppException = new WebApplicationException(message);
  92                                 break;
  93                         default:
  94                                 webAppException = new WebApplicationException(message);
  95                         }
  96                         throw webAppException;
  97                 }
  98         }
  99
 100         public abstract Optional<String> extractMessage(String entity);
 101 }