Examples of org.springframework.web.client.RestTemplate

org.springframework.web.client.RestTemplate
le.com/hotels/{hotel}/bookings/{booking}", String.class,"42", "21"); will perform a GET on {@code http://example.com/hotels/42/bookings/21}. The map variant expands the template based on variable name, and is therefore more useful when using many variables, or when a single variable is used multiple times. For example:
```
 Map<String, String> vars = Collections.singletonMap("hotel", "42"); String result = restTemplate.getForObject("http://example.com/hotels/{hotel}/rooms/{hotel}", String.class, vars); 
```
will perform a GET on {@code http://example.com/hotels/42/rooms/42}. Alternatively, there are {@link URI} variantmethods ( {@link #getForObject(URI,Class)}), which do not allow for URI templates, but allow you to reuse a single, expanded URI multiple times.
Furthermore, the {@code String}-argument methods assume that the URL String is unencoded. This means that
```
 restTemplate.getForObject("http://example.com/hotel list"); 
```
will perform a GET on {@code http://example.com/hotel%20list}. As a result, any URL passed that is already encoded will be encoded twice (i.e. {@code http://example.com/hotel%20list} will become {@code http://example.com/hotel%2520list}). If this behavior is undesirable, use the {@code URI}-argument methods, which will not perform any URL encoding.
Objects passed to and returned from these methods are converted to and from HTTP messages by {@link HttpMessageConverter} instances. Converters for the main mime types are registered by default, but you can also writeyour own converter and register it via the {@link #setMessageConverters messageConverters} bean property.
This template uses a {@link org.springframework.http.client.SimpleClientHttpRequestFactory} and a {@link DefaultResponseErrorHandler} as default strategies for creating HTTP connections or handling HTTP errors,respectively. These defaults can be overridden through the {@link #setRequestFactory(ClientHttpRequestFactory) requestFactory} and {@link #setErrorHandler(ResponseErrorHandler) errorHandler} bean properties. @author Arjen Poutsma @see HttpMessageConverter @see RequestCallback @see ResponseExtractor @see ResponseErrorHandler @since 3.0

    /**
     * Create a JSON REST Template for requests
     * @return a RestTemplate configured to process JSON data
     */
    private RestTemplate getRestJsonTemplate(){
        RestTemplate restTemplate = new RestTemplate();
        List<HttpMessageConverter<?>> mc = restTemplate.getMessageConverters();
        // Add JSON message handler
        MappingJackson2HttpMessageConverter json = new MappingJackson2HttpMessageConverter();
        List<MediaType> supportedMediaTypes = new ArrayList<MediaType>();
        supportedMediaTypes.add(new MediaType("application","json", Charset.forName("UTF-8")));
        // Add default media type in case marketplace uses incorrect MIME type, otherwise
        // Spring refuses to process it, even if its valid JSON
        supportedMediaTypes.add(new MediaType("application","octet-stream", Charset.forName("UTF-8")));
        json.setSupportedMediaTypes(supportedMediaTypes);
        mc.add(json);
        restTemplate.setMessageConverters(mc);
        return restTemplate;
    }

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    private ObjectMapper mapper;


    public ZencoderClient(String api_key) {
        this.api_key = api_key;
        this.api_url = API_URL;
        this.rt = new RestTemplate();
        this.mapper = createObjectMapper();
    }

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       *   /*POST https://www.googleapis.com/urlshortener/v1/url
    Content-Type: application/json


    {"longUrl": "http://www.google.com/"}
       */
      RestTemplate template = new RestTemplate();
      List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
     messageConverters.add(new MappingJacksonHttpMessageConverter());
      template.setMessageConverters(messageConverters);
         //now we need to add the parameters
      String apiKey = this.searchConfigRetriever.getArbitrary("googleAPIKey");


       LinkShortenRequestGoogle postObject = new LinkShortenRequestGoogle(longUrl);
       LinkShortenReturnGoogle result = template.postForObject(url + apiKey, postObject, LinkShortenReturnGoogle.class);


       return result.getId();
    }

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        } else {
          this.anonymous = true;
        }
      HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(httpclient);
      
          this.restTemplate = new RestTemplate(factory);
          
          this.allTags = new HashSet<String>();
          logger.info("client initialized");
      }

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   * with {@link HttpComponentsClientHttpRequestFactory}.
   *
   * @param baseUri the base uri
   */
  public YarnContainerClusterTemplate(String baseUri) {
    this.restTemplate = new RestTemplate(new HttpComponentsClientHttpRequestFactory());
    this.baseUri = baseUri;
  }

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  /**
   * @param args
   */
  public static void main(String[] args) throws Exception{
    RestTemplate template = new RestTemplate();
    Resource s2logo = new ClassPathResource(resourcePath);
    MultiValueMap<String, Object> multipartMap = new LinkedMultiValueMap<String, Object>();
    multipartMap.add("company", "SpringSource");
    multipartMap.add("company-logo", s2logo);
    logger.info("Created multipart request: " + multipartMap);
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(new MediaType("multipart", "form-data"));
    HttpEntity<Object> request = new HttpEntity<Object>(multipartMap, headers);
    logger.info("Posting request to: " + uri);
    ResponseEntity<?> httpResponse = template.exchange(uri, HttpMethod.POST, request, Object.class);
    if (!httpResponse.getStatusCode().equals(HttpStatus.OK)){
      logger.error("Problems with the request. Http status: " + httpResponse.getStatusCode());
    }
  }

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 * Time: 4:24 PM
 */
public class RestTemplateClient implements Client {
    @Override
    public Response execute(Request request, Request.Options options) throws IOException {
        RestTemplate restTemplate = new RestTemplate();
        HttpMethod method = HttpMethod.valueOf(request.method());


        HttpHeaders requestHeaders = new HttpHeaders();
        for (String header: request.headers().keySet()) {
            Collection<String> values = request.headers().get(header);
            if (values != null && !values.isEmpty())
                requestHeaders.put(header, new ArrayList<>(values));
        }


        HttpEntity<byte[]> httpEntity = new HttpEntity<>(request.body(), requestHeaders);


        ResponseEntity<byte[]> responseEntity = restTemplate.exchange(request.url(), method, httpEntity, byte[].class);


        Map<String, Collection<String>> headers = new HashMap<>();


        for (String header: responseEntity.getHeaders().keySet()) {
            headers.put(header, responseEntity.getHeaders().get(header));

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        // create message converters list
        List<HttpMessageConverter<?>> httpMessageConverters = new ArrayList<HttpMessageConverter<?>>();
        httpMessageConverters.add(mappingJacksonHttpMessageConverter);


        // create rest template
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.setMessageConverters(httpMessageConverters);


        // configure proxy
        if (Boolean.parseBoolean(System.getProperty("proxySet"))) {
            HttpHost httpHost = new HttpHost(System.getProperty("http.proxyHost"), Integer.parseInt(System.getProperty("http.proxyPort")));
            DefaultProxyRoutePlanner defaultProxyRoutePlanner = new DefaultProxyRoutePlanner(httpHost);
            HttpClient httpClient = HttpClients.custom().setRoutePlanner(defaultProxyRoutePlanner).build();
//            todo - need to support SOCKS protocol for this solution to work - jamesdbloom 12/01/2014
//            HttpClient httpClient = HttpClients.custom().setRoutePlanner(new SystemDefaultRoutePlanner(PROXY_SELECTOR.getDefault())).build();
            restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(httpClient));
        }


        return restTemplate;
    }

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    BasicCredentialsProvider credentialsProvider =  new BasicCredentialsProvider();
    credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(adminUser, adminPass));
    client.setCredentialsProvider(credentialsProvider);
    ClientHttpRequestFactory rf = new HttpComponentsClientHttpRequestFactory(client);


    RestTemplate template = new RestTemplate(rf);


    String fullUri = "http://" + hostUri + ":8091/pools/default/buckets/default";


    ResponseEntity<String> entity = null;
    try {
      entity = template.getForEntity(fullUri, String.class);
    } catch (HttpClientErrorException ex) {
      logger.info("Got execpetion while looking for bucket: " + ex.getMessage());
      if (ex.getMessage().equals("404 Object Not Found")) {
        logger.info("Creating default bucket with admin credentials.");
        createBucket();

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        ((DefaultHttpClient) requestFactory.getHttpClient()).getCredentialsProvider().setCredentials(
                requestFactory.getAuthScope(), new UsernamePasswordCredentials(uid, pwd));
    }


    private RestTemplate getAnonymousRestTemplate() {
        RestTemplate template = new RestTemplate(httpClientFactory);
        List<HttpMessageConverter<?>> converters = new ArrayList<HttpMessageConverter<?>>();
        converters.add(mappingJacksonHttpMessageConverter);
        template.setMessageConverters(converters);
        template.setErrorHandler(new SyncopeClientErrorHandler());
        return template;
    }

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