2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2019 Nordix Foundation.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.so.rest.service;
23 import org.onap.so.configuration.rest.HttpHeadersProvider;
24 import org.onap.so.rest.exceptions.HttpResouceNotFoundException;
25 import org.onap.so.rest.exceptions.InvalidRestRequestException;
26 import org.onap.so.rest.exceptions.RestProcessingException;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
29 import org.springframework.http.HttpEntity;
30 import org.springframework.http.HttpHeaders;
31 import org.springframework.http.HttpMethod;
32 import org.springframework.http.HttpStatus;
33 import org.springframework.http.ResponseEntity;
34 import org.springframework.web.client.HttpStatusCodeException;
35 import org.springframework.web.client.RestClientException;
36 import org.springframework.web.client.RestTemplate;
37 import com.google.common.base.Optional;
40 * A Service to perform HTTP requests
42 * @author waqas.ikram@est.tech
44 public class HttpRestServiceProviderImpl implements HttpRestServiceProvider {
46 private static final Logger LOGGER = LoggerFactory.getLogger(HttpRestServiceProviderImpl.class);
47 private final RestTemplate restTemplate;
48 private final HttpHeaders defaultHttpHeaders;
50 public HttpRestServiceProviderImpl(final RestTemplate restTemplate) {
51 this.restTemplate = restTemplate;
52 this.defaultHttpHeaders = new HttpHeaders();
55 public HttpRestServiceProviderImpl(final RestTemplate restTemplate, final HttpHeaders defaultHttpHeaders) {
56 this.restTemplate = restTemplate;
57 this.defaultHttpHeaders = defaultHttpHeaders;
62 * @deprecated this constructor is deprecated in favor of using {@link HttpRestServiceProviderImpl(RestTemplate
63 * restTemplate, HttpHeaders defaultHttpHeaders)}
66 public HttpRestServiceProviderImpl(final RestTemplate restTemplate, final HttpHeadersProvider httpHeadersProvider) {
67 this.restTemplate = restTemplate;
68 this.defaultHttpHeaders = httpHeadersProvider.getHttpHeaders();
72 public <T> Optional<T> get(final String url, final Class<T> clazz) {
73 final ResponseEntity<T> response = getHttpResponse(url, clazz);
74 return createOptional(response, url, HttpMethod.GET);
78 public <T> Optional<T> get(final String url, final HttpHeaders headers, final Class<T> clazz) {
79 final ResponseEntity<T> response = invokeHttpRequest(new HttpEntity<>(headers), HttpMethod.GET, url, clazz);
80 return createOptional(response, url, HttpMethod.GET);
84 public <T> ResponseEntity<T> getHttpResponse(final String url, final Class<T> clazz) {
85 final HttpEntity<?> request = new HttpEntity<>(getDefaultHttpHeaders());
86 return invokeHttpRequest(request, HttpMethod.GET, url, clazz);
90 public <T> ResponseEntity<T> getHttpResponse(final String url, final HttpHeaders headers, final Class<T> clazz) {
91 final HttpEntity<?> request = new HttpEntity<>(headers);
92 return invokeHttpRequest(request, HttpMethod.GET, url, clazz);
96 public <T> Optional<T> post(final Object object, final String url, final Class<T> clazz) {
97 final ResponseEntity<T> response = postHttpRequest(object, url, clazz);
98 return createOptional(response, url, HttpMethod.POST);
102 public <T> ResponseEntity<T> postHttpRequest(final Object object, final String url, final Class<T> clazz) {
103 final HttpEntity<?> request = new HttpEntity<>(object, getDefaultHttpHeaders());
104 return invokeHttpRequest(request, HttpMethod.POST, url, clazz);
108 public <T> ResponseEntity<T> postHttpRequest(final Object object, final String url, final HttpHeaders headers,
109 final Class<T> clazz) {
110 final HttpEntity<?> request = new HttpEntity<>(object, headers);
111 return invokeHttpRequest(request, HttpMethod.POST, url, clazz);
115 public <T> Optional<T> put(final Object object, final String url, final Class<T> clazz) {
116 final ResponseEntity<T> response = putHttpRequest(object, url, clazz);
117 return createOptional(response, url, HttpMethod.PUT);
121 public <T> ResponseEntity<T> putHttpRequest(final Object object, final String url, final Class<T> clazz) {
122 final HttpEntity<?> request = new HttpEntity<>(object, getDefaultHttpHeaders());
123 return invokeHttpRequest(request, HttpMethod.PUT, url, clazz);
126 private <T> Optional<T> createOptional(final ResponseEntity<T> response, final String url,
127 final HttpMethod httpMethod) {
128 if (!response.getStatusCode().equals(HttpStatus.OK) && !response.getStatusCode().equals(HttpStatus.CREATED)) {
129 final String message = "Unable to invoke HTTP " + httpMethod + " using URL: " + url + ", Response Code: "
130 + response.getStatusCode();
131 LOGGER.error(message);
132 return Optional.absent();
135 if (response.hasBody()) {
136 return Optional.of(response.getBody());
139 return Optional.absent();
142 private <T> ResponseEntity<T> invokeHttpRequest(final HttpEntity<?> request, final HttpMethod httpMethod,
143 final String url, final Class<T> clazz) {
144 LOGGER.trace("Will invoke HTTP {} using URL: {}", httpMethod, url);
146 return restTemplate.exchange(url, httpMethod, request, clazz);
148 } catch (final HttpStatusCodeException httpStatusCodeException) {
149 final String message = "Unable to invoke HTTP " + httpMethod + " using url: " + url + ", Response: "
150 + httpStatusCodeException.getRawStatusCode();
151 LOGGER.error(message, httpStatusCodeException);
152 final int rawStatusCode = httpStatusCodeException.getRawStatusCode();
153 if (rawStatusCode == HttpStatus.BAD_REQUEST.value()) {
154 throw new InvalidRestRequestException("No result found for given url: " + url);
155 } else if (rawStatusCode == HttpStatus.NOT_FOUND.value()) {
156 throw new HttpResouceNotFoundException("No result found for given url: " + url);
158 throw new RestProcessingException("Unable to invoke HTTP " + httpMethod + " using URL: " + url,
159 httpStatusCodeException, rawStatusCode);
161 } catch (final RestClientException restClientException) {
162 LOGGER.error("Unable to invoke HTTP POST using url: {}", url, restClientException);
163 throw new RestProcessingException("Unable to invoke HTTP " + httpMethod + " using URL: " + url,
164 restClientException);
169 public <T> ResponseEntity<T> deleteHttpRequest(final String url, final Class<T> clazz) {
171 final HttpEntity<?> request = new HttpEntity<>(getDefaultHttpHeaders());
172 return restTemplate.exchange(url, HttpMethod.DELETE, request, clazz);
174 } catch (final HttpStatusCodeException httpStatusCodeException) {
175 final String message = "Unable to invoke HTTP " + HttpMethod.DELETE + " using url: " + url + ", Response: "
176 + httpStatusCodeException.getRawStatusCode();
177 LOGGER.error(message, httpStatusCodeException);
178 final int rawStatusCode = httpStatusCodeException.getRawStatusCode();
179 if (rawStatusCode == HttpStatus.BAD_REQUEST.value()) {
180 throw new InvalidRestRequestException("No result found for given url: " + url);
181 } else if (rawStatusCode == HttpStatus.NOT_FOUND.value()) {
182 throw new HttpResouceNotFoundException("No result found for given url: " + url);
184 throw new RestProcessingException("Unable to invoke HTTP " + HttpMethod.DELETE + " using URL: " + url,
185 httpStatusCodeException, rawStatusCode);
186 } catch (final RestClientException restClientException) {
187 LOGGER.error("Unable to invoke HTTP DELETE using url: " + url, restClientException);
188 throw new InvalidRestRequestException("Unable to invoke HTTP DELETE using URL: " + url,
189 restClientException);
193 private HttpHeaders getDefaultHttpHeaders() {
194 return defaultHttpHeaders;