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 com.google.common.base.Optional;
24 import org.onap.so.configuration.rest.BasicHttpHeadersProvider;
25 import org.onap.so.configuration.rest.HttpHeadersProvider;
26 import org.onap.so.rest.exceptions.HttpResouceNotFoundException;
27 import org.onap.so.rest.exceptions.InvalidRestRequestException;
28 import org.onap.so.rest.exceptions.RestProcessingException;
29 import org.slf4j.Logger;
30 import org.slf4j.LoggerFactory;
31 import org.springframework.http.HttpEntity;
32 import org.springframework.http.HttpHeaders;
33 import org.springframework.http.HttpMethod;
34 import org.springframework.http.HttpStatus;
35 import org.springframework.http.ResponseEntity;
36 import org.springframework.web.client.HttpStatusCodeException;
37 import org.springframework.web.client.RestClientException;
38 import org.springframework.web.client.RestTemplate;
41 * A Service to perform HTTP requests
43 * @author waqas.ikram@est.tech
45 public class HttpRestServiceProviderImpl implements HttpRestServiceProvider {
47 private static final Logger LOGGER = LoggerFactory.getLogger(HttpRestServiceProviderImpl.class);
48 private final RestTemplate restTemplate;
49 private final HttpHeadersProvider httpHeadersProvider;
51 public HttpRestServiceProviderImpl(final RestTemplate restTemplate) {
52 this.restTemplate = restTemplate;
53 this.httpHeadersProvider = new BasicHttpHeadersProvider();
56 public HttpRestServiceProviderImpl(final RestTemplate restTemplate, final HttpHeadersProvider httpHeadersProvider) {
57 this.restTemplate = restTemplate;
58 this.httpHeadersProvider = httpHeadersProvider;
62 public <T> Optional<T> get(final String url, final Class<T> clazz) {
63 final ResponseEntity<T> response = getHttpResponse(url, clazz);
64 return createOptional(response, url, HttpMethod.GET);
69 public <T> ResponseEntity<T> getHttpResponse(final String url, final Class<T> clazz) {
70 final HttpEntity<?> request = new HttpEntity<>(getHttpHeaders());
71 return invokeHttpRequest(request, HttpMethod.GET, url, clazz);
75 public <T> Optional<T> post(final Object object, final String url, final Class<T> clazz) {
76 final ResponseEntity<T> response = postHttpRequest(object, url, clazz);
77 return createOptional(response, url, HttpMethod.POST);
81 public <T> ResponseEntity<T> postHttpRequest(final Object object, final String url, final Class<T> clazz) {
82 final HttpEntity<?> request = new HttpEntity<>(object, getHttpHeaders());
83 return invokeHttpRequest(request, HttpMethod.POST, url, clazz);
87 public <T> Optional<T> put(final Object object, final String url, final Class<T> clazz) {
88 final ResponseEntity<T> response = putHttpRequest(object, url, clazz);
89 return createOptional(response, url, HttpMethod.PUT);
93 public <T> ResponseEntity<T> putHttpRequest(final Object object, final String url, final Class<T> clazz) {
94 final HttpEntity<?> request = new HttpEntity<>(object, getHttpHeaders());
95 return invokeHttpRequest(request, HttpMethod.PUT, url, clazz);
98 private <T> Optional<T> createOptional(final ResponseEntity<T> response, final String url,
99 final HttpMethod httpMethod) {
100 if (!response.getStatusCode().equals(HttpStatus.OK) && !response.getStatusCode().equals(HttpStatus.CREATED)) {
101 final String message = "Unable to invoke HTTP " + httpMethod + " using URL: " + url + ", Response Code: "
102 + response.getStatusCode();
103 LOGGER.error(message);
104 return Optional.absent();
107 if (response.hasBody()) {
108 return Optional.of(response.getBody());
111 return Optional.absent();
114 private <T> ResponseEntity<T> invokeHttpRequest(final HttpEntity<?> request, final HttpMethod httpMethod,
115 final String url, final Class<T> clazz) {
116 LOGGER.trace("Will invoke HTTP {} using URL: {}", httpMethod, url);
118 return restTemplate.exchange(url, httpMethod, request, clazz);
120 } catch (final HttpStatusCodeException httpStatusCodeException) {
121 final String message = "Unable to invoke HTTP " + httpMethod + " using url: " + url + ", Response: "
122 + httpStatusCodeException.getRawStatusCode();
123 LOGGER.error(message, httpStatusCodeException);
124 final int rawStatusCode = httpStatusCodeException.getRawStatusCode();
125 if (rawStatusCode == HttpStatus.BAD_REQUEST.value()) {
126 throw new InvalidRestRequestException("No result found for given url: " + url);
127 } else if (rawStatusCode == HttpStatus.NOT_FOUND.value()) {
128 throw new HttpResouceNotFoundException("No result found for given url: " + url);
130 throw new RestProcessingException("Unable to invoke HTTP " + httpMethod + " using URL: " + url,
131 httpStatusCodeException, rawStatusCode);
133 } catch (final RestClientException restClientException) {
134 LOGGER.error("Unable to invoke HTTP POST using url: {}", url, restClientException);
135 throw new RestProcessingException("Unable to invoke HTTP " + httpMethod + " using URL: " + url,
136 restClientException);
141 public <T> ResponseEntity<T> deleteHttpRequest(final String url, final Class<T> clazz) {
143 final HttpEntity<?> request = new HttpEntity<>(getHttpHeaders());
144 return restTemplate.exchange(url, HttpMethod.DELETE, request, clazz);
146 } catch (final RestClientException restClientException) {
147 LOGGER.error("Unable to invoke HTTP DELETE using url: " + url, restClientException);
148 throw new InvalidRestRequestException("Unable to invoke HTTP DELETE using URL: " + url,
149 restClientException);
153 private HttpHeaders getHttpHeaders() {
154 return httpHeadersProvider.getHttpHeaders();