gerrit.onap Code Review - so/libs.git/blob

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at
   6  *
   7  *      http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  * ============LICENSE_END=========================================================
  15  */
  16
  17 package com.woorea.openstack.connector;
  18
  19 import java.util.List;
  20 import java.util.Map;
  21 import java.util.Map.Entry;
  22
  23 import javax.ws.rs.core.UriBuilder;
  24 import javax.ws.rs.ext.ContextResolver;
  25
  26 import org.apache.commons.httpclient.HttpStatus;
  27 import org.codehaus.jackson.jaxrs.JacksonJsonProvider;
  28 import org.codehaus.jackson.map.DeserializationConfig;
  29 import org.codehaus.jackson.map.ObjectMapper;
  30 import org.codehaus.jackson.map.SerializationConfig;
  31 import org.codehaus.jackson.map.annotate.JsonRootName;
  32 import org.codehaus.jackson.map.annotate.JsonSerialize.Inclusion;
  33 import org.jboss.resteasy.client.ClientRequest;
  34 import org.jboss.resteasy.client.ClientResponse;
  35 import org.jboss.resteasy.plugins.providers.InputStreamProvider;
  36 import org.jboss.resteasy.spi.ResteasyProviderFactory;
  37
  38 import com.woorea.openstack.base.client.OpenStackClientConnector;
  39 import com.woorea.openstack.base.client.OpenStackRequest;
  40 import com.woorea.openstack.base.client.OpenStackResponse;
  41 import com.woorea.openstack.base.client.OpenStackResponseException;
  42
  43 public class RESTEasyConnector implements OpenStackClientConnector {
  44
  45         public static ObjectMapper DEFAULT_MAPPER;
  46
  47         public static ObjectMapper WRAPPED_MAPPER;
  48
  49         static class OpenStackProviderFactory extends ResteasyProviderFactory {
  50
  51                 private JacksonJsonProvider jsonProvider;
  52                 private InputStreamProvider streamProvider;
  53
  54                 public OpenStackProviderFactory() {
  55                         super();
  56
  57                         addContextResolver(new ContextResolver<ObjectMapper>() {
  58                                 public ObjectMapper getContext(Class<?> type) {
  59                                         return type.getAnnotation(JsonRootName.class) == null ? DEFAULT_MAPPER : WRAPPED_MAPPER;
  60                                 }
  61                         });
  62
  63                         jsonProvider = new JacksonJsonProvider();
  64                         addMessageBodyReader(jsonProvider);
  65                         addMessageBodyWriter(jsonProvider);
  66
  67                         streamProvider = new InputStreamProvider();
  68                         addMessageBodyReader(streamProvider);
  69                         addMessageBodyWriter(streamProvider);
  70                 }
  71
  72         }
  73
  74         private static OpenStackProviderFactory providerFactory;
  75
  76         static {
  77                 DEFAULT_MAPPER = new ObjectMapper();
  78
  79                 DEFAULT_MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
  80                 DEFAULT_MAPPER.enable(SerializationConfig.Feature.INDENT_OUTPUT);
  81                 DEFAULT_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
  82                 DEFAULT_MAPPER.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
  83                 DEFAULT_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);
  84
  85                 WRAPPED_MAPPER = new ObjectMapper();
  86
  87                 WRAPPED_MAPPER.setSerializationInclusion(Inclusion.NON_NULL);
  88                 WRAPPED_MAPPER.enable(SerializationConfig.Feature.INDENT_OUTPUT);
  89                 WRAPPED_MAPPER.enable(SerializationConfig.Feature.WRAP_ROOT_VALUE);
  90                 WRAPPED_MAPPER.enable(DeserializationConfig.Feature.UNWRAP_ROOT_VALUE);
  91                 WRAPPED_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
  92                 WRAPPED_MAPPER.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
  93                 WRAPPED_MAPPER.enable(DeserializationConfig.Feature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);
  94
  95                 providerFactory = new OpenStackProviderFactory();
  96         }
  97
  98         public <T> OpenStackResponse request(OpenStackRequest<T> request) {
  99                 ClientRequest client = new ClientRequest(UriBuilder.fromUri(request.endpoint() + "/" + request.path()),
 100                                 ClientRequest.getDefaultExecutor(), providerFactory);
 101
 102                 for(Map.Entry<String, List<Object> > entry : request.queryParams().entrySet()) {
 103                         for (Object o : entry.getValue()) {
 104                                 client = client.queryParameter(entry.getKey(), String.valueOf(o));
 105                         }
 106                 }
 107
 108                 for (Entry<String, List<Object>> h : request.headers().entrySet()) {
 109                         StringBuilder sb = new StringBuilder();
 110                         for (Object v : h.getValue()) {
 111                                 sb.append(String.valueOf(v));
 112                         }
 113                         client.header(h.getKey(), sb);
 114                 }
 115
 116                 if (request.entity() != null) {
 117                         client.body(request.entity().getContentType(), request.entity().getEntity());
 118                 }
 119
 120                 ClientResponse<T> response;
 121
 122                 try {
 123                         response = client.httpMethod(request.method().name(), request.returnType());
 124                 } catch (Exception e) {
 125                         throw new RuntimeException("Unexpected client exception", e);
 126                 }
 127
 128                 if (response.getStatus() == HttpStatus.SC_OK
 129                                 || response.getStatus() == HttpStatus.SC_CREATED
 130                                 || response.getStatus() == HttpStatus.SC_NO_CONTENT
 131                                 || response.getStatus() == HttpStatus.SC_ACCEPTED) {
 132                         return new RESTEasyResponse(client, response);
 133                 }
 134
 135                 response.releaseConnection();
 136
 137                 throw new OpenStackResponseException(response.getResponseStatus()
 138                                 .getReasonPhrase(), response.getStatus());
 139         }
 140
 141 }