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.InvalidRestRequestException;
27 import org.onap.so.rest.exceptions.RestProcessingException;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
30 import org.springframework.http.HttpEntity;
31 import org.springframework.http.HttpHeaders;
32 import org.springframework.http.HttpMethod;
33 import org.springframework.http.HttpStatus;
34 import org.springframework.http.ResponseEntity;
35 import org.springframework.web.client.HttpClientErrorException;
36 import org.springframework.web.client.RestClientException;
37 import org.springframework.web.client.RestTemplate;
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 HttpHeadersProvider httpHeadersProvider;
50 public HttpRestServiceProviderImpl(final RestTemplate restTemplate) {
51 this.restTemplate = restTemplate;
52 this.httpHeadersProvider = new BasicHttpHeadersProvider();
55 public HttpRestServiceProviderImpl(final RestTemplate restTemplate, final HttpHeadersProvider httpHeadersProvider) {
56 this.restTemplate = restTemplate;
57 this.httpHeadersProvider = httpHeadersProvider;
61 public <T> Optional<T> get(final String url, final Class<T> clazz) {
62 final ResponseEntity<T> response = getHttpResponse(url, clazz);
63 return createOptional(response, url, HttpMethod.GET);
68 public <T> ResponseEntity<T> getHttpResponse(final String url, final Class<T> clazz) {
69 final HttpEntity<?> request = new HttpEntity<>(getHttpHeaders());
70 return invokeHttpRequest(request, HttpMethod.GET, url, clazz);
74 public <T> Optional<T> post(final Object object, final String url, final Class<T> clazz) {
75 final ResponseEntity<T> response = postHttpRequest(object, url, clazz);
76 return createOptional(response, url, HttpMethod.POST);
80 public <T> ResponseEntity<T> postHttpRequest(final Object object, final String url, final Class<T> clazz) {
81 final HttpEntity<?> request = new HttpEntity<>(object, getHttpHeaders());
82 return invokeHttpRequest(request, HttpMethod.POST, url, clazz);
86 public <T> Optional<T> put(final Object object, final String url, final Class<T> clazz) {
87 final ResponseEntity<T> response = putHttpRequest(object, url, clazz);
88 return createOptional(response, url, HttpMethod.PUT);
92 public <T> ResponseEntity<T> putHttpRequest(final Object object, final String url, final Class<T> clazz) {
93 final HttpEntity<?> request = new HttpEntity<>(object, getHttpHeaders());
94 return invokeHttpRequest(request, HttpMethod.PUT, url, clazz);
97 private <T> Optional<T> createOptional(final ResponseEntity<T> response, final String url,
98 final HttpMethod httpMethod) {
99 if (!response.getStatusCode().equals(HttpStatus.OK)) {
100 final String message = "Unable to invoke HTTP " + httpMethod + " using URL: " + url + ", Response Code: "
101 + response.getStatusCode();
102 LOGGER.error(message);
103 return Optional.absent();
106 if (response.hasBody()) {
107 return Optional.of(response.getBody());
110 return Optional.absent();
113 private <T> ResponseEntity<T> invokeHttpRequest(final HttpEntity<?> request, final HttpMethod httpMethod,
114 final String url, final Class<T> clazz) {
115 LOGGER.trace("Will invoke HTTP {} using URL: {}", httpMethod, url);
117 return restTemplate.exchange(url, httpMethod, request, clazz);
119 } catch (final HttpClientErrorException httpClientErrorException) {
120 final String message = "Unable to invoke HTTP " + httpMethod + " using url: " + url + ", Response: "
121 + httpClientErrorException.getRawStatusCode();
122 LOGGER.error(message, httpClientErrorException);
123 final int rawStatusCode = httpClientErrorException.getRawStatusCode();
124 if (rawStatusCode == HttpStatus.BAD_REQUEST.value() || rawStatusCode == HttpStatus.NOT_FOUND.value()) {
125 throw new InvalidRestRequestException("No result found for given url: " + url);
127 throw new RestProcessingException("Unable to invoke HTTP " + httpMethod + " using URL: " + url);
129 } catch (final RestClientException restClientException) {
130 LOGGER.error("Unable to invoke HTTP POST using url: {}", url, restClientException);
131 throw new RestProcessingException("Unable to invoke HTTP " + httpMethod + " using URL: " + url,
132 restClientException);
136 private HttpHeaders getHttpHeaders() {
137 return httpHeadersProvider.getHttpHeaders();