2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
6 * Copyright © 2017-2018 Amdocs
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END=========================================================
21 package org.onap.aai.restclient.client;
23 import java.io.ByteArrayOutputStream;
24 import java.text.SimpleDateFormat;
25 import java.util.Arrays;
26 import java.util.List;
28 import java.util.Map.Entry;
29 import java.util.UUID;
30 import java.util.concurrent.ConcurrentHashMap;
31 import java.util.concurrent.ConcurrentMap;
33 import javax.ws.rs.core.MediaType;
34 import javax.ws.rs.core.MultivaluedMap;
35 import javax.ws.rs.core.Response;
37 import org.onap.aai.restclient.enums.RestAuthenticationMode;
38 import org.onap.aai.restclient.logging.RestClientMsgs;
39 import org.onap.aai.restclient.rest.RestClientBuilder;
40 import org.onap.aai.cl.api.LogFields;
41 import org.onap.aai.cl.api.LogLine;
42 import org.onap.aai.cl.api.Logger;
43 import org.onap.aai.cl.eelf.LoggerFactory;
44 import org.onap.aai.cl.mdc.MdcContext;
45 import org.onap.aai.cl.mdc.MdcOverride;
47 import com.sun.jersey.api.client.Client;
48 import com.sun.jersey.api.client.ClientResponse;
49 import com.sun.jersey.api.client.WebResource;
50 import com.sun.jersey.api.client.WebResource.Builder;
51 import com.sun.jersey.core.util.MultivaluedMapImpl;
55 * This class provides a general client implementation that micro services can use for communicating
56 * with the endpoints via their exposed REST interfaces.
60 public class RestClient {
63 * This is a generic builder that is used for constructing the REST client that we will use to
64 * communicate with the REST endpoint.
66 private RestClientBuilder clientBuilder;
68 private final ConcurrentMap<String,InitializedClient> CLIENT_CACHE = new ConcurrentHashMap<>();
69 private static final String REST_CLIENT_INSTANCE = "REST_CLIENT_INSTANCE";
71 /** Standard logger for producing log statements. */
72 private Logger logger = LoggerFactory.getInstance().getLogger("AAIRESTClient");
74 /** Standard logger for producing metric statements. */
75 private Logger metricsLogger = LoggerFactory.getInstance().getMetricsLogger("AAIRESTClient");
77 private SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");
79 /** Reusable function call for GET REST operations. */
80 private final RestOperation getOp = new GetRestOperation();
82 /** Reusable function call for PUT REST operations. */
83 private final RestOperation putOp = new PutRestOperation();
85 /** Reusable function call for POST REST operations. */
86 private final RestOperation postOp = new PostRestOperation();
88 /** Reusable function call for DELETE REST operations. */
89 private final RestOperation deleteOp = new DeleteRestOperation();
91 /** Reusable function call for HEAD REST operations. */
92 private final RestOperation headOp = new HeadRestOperation();
94 /** Reusable function call for PATCH REST operations. */
95 private final RestOperation patchOp = new PatchRestOperation();
99 * Creates a new instance of the {@link RestClient}.
101 public RestClient() {
103 clientBuilder = new RestClientBuilder();
109 * Creates a new instance of the {@link RestClient} using the supplied {@link RestClientBuilder}.
111 * @param rcBuilder - The REST client builder that this instance of the {@link RestClient} should
114 public RestClient(RestClientBuilder rcBuilder) {
115 clientBuilder = rcBuilder;
118 public RestClient authenticationMode(RestAuthenticationMode mode) {
119 logger.debug("Set rest authentication mode= " + mode);
120 clientBuilder.setAuthenticationMode(mode);
124 public RestClient basicAuthUsername(String username) {
125 logger.debug("Set SSL BasicAuth username = " + username);
126 clientBuilder.setBasicAuthUsername(username);
130 public RestClient basicAuthPassword(String password) {
132 * purposely not logging out the password, I guess we could obfuscate it if we really want to
135 clientBuilder.setBasicAuthPassword(password);
141 * Sets the flag to indicate whether or not validation should be performed against the host name
142 * of the server we are trying to communicate with.
144 * @parameter validate - Set to true to enable validation, false to disable
146 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
148 public RestClient validateServerHostname(boolean validate) {
149 logger.debug("Set validate server hostname = " + validate);
150 clientBuilder.setValidateServerHostname(validate);
156 * Sets the flag to indicate whether or not validation should be performed against the certificate
159 * @parameter validate - Set to true to enable validation, false to disable.
161 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
163 public RestClient validateServerCertChain(boolean validate) {
164 logger.debug("Set validate server certificate chain = " + validate);
165 clientBuilder.setValidateServerCertChain(validate);
171 * Assigns the client certificate file to use.
173 * @param filename - The name of the certificate file.
175 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
177 public RestClient clientCertFile(String filename) {
178 logger.debug("Set client certificate filename = " + filename);
179 clientBuilder.setClientCertFileName(filename);
185 * Assigns the client certificate password to use.
187 * @param password - The certificate password.
189 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
191 public RestClient clientCertPassword(String password) {
192 clientBuilder.setClientCertPassword(password);
198 * Assigns the name of the trust store file to use.
200 * @param filename - the name of the trust store file.
202 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
204 public RestClient trustStore(String filename) {
205 logger.debug("Set trust store filename = " + filename);
206 clientBuilder.setTruststoreFilename(filename);
212 * Assigns the connection timeout (in ms) to use when connecting to the target server.
214 * @param timeout - The length of time to wait in ms before timing out.
216 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
218 public RestClient connectTimeoutMs(int timeout) {
219 logger.debug("Set connection timeout = " + timeout + " ms");
220 clientBuilder.setConnectTimeoutInMs(timeout);
226 * Assigns the read timeout (in ms) to use when communicating with the target server.
228 * @param timeout The read timeout in milliseconds.
230 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
232 public RestClient readTimeoutMs(int timeout) {
233 logger.debug("Set read timeout = " + timeout + " ms");
234 clientBuilder.setReadTimeoutInMs(timeout);
239 * Configures the client for a specific SSL protocol
241 * @param sslProtocol - protocol string constant such as TLS, TLSv1, TLSv1.1, TLSv1.2
243 * @return The AAIRESTClient instance.
245 public RestClient sslProtocol(String sslProtocol) {
246 logger.debug("Set sslProtocol = " + sslProtocol);
247 clientBuilder.setSslProtocol(sslProtocol);
251 private boolean shouldRetry(OperationResult operationResult) {
253 if (operationResult == null) {
257 int resultCode = operationResult.getResultCode();
259 if (resultCode == 200) {
263 if (resultCode == 404) {
272 * This method operates on a REST endpoint by submitting an HTTP operation request against the
274 * This variant of the method will perform a requested number of retries in the event that the
275 * first request is unsuccessful.
277 * @param operation - the REST operation type to send to the url
278 * @param url - The REST endpoint to submit the REST request to.
279 * @param payload - They payload to provide in the REST request, if applicable
280 * @param headers - The headers that should be passed in the request
281 * @param contentType - The content type of the payload
282 * @param responseType - The expected format of the response.
284 * @return The result of the REST request.
286 protected OperationResult processRequest(RestOperation operation, String url, String payload,
287 Map<String, List<String>> headers, MediaType contentType, MediaType responseType,
291 OperationResult result = null;
293 long startTimeInMs = System.currentTimeMillis();
294 for (int retryCount = 0; retryCount < numRetries; retryCount++) {
296 logger.info(RestClientMsgs.HTTP_REQUEST_WITH_RETRIES, operation.getRequestType().toString(),
297 url, Integer.toString(retryCount + 1));
299 // Submit our query to the AAI.
300 result = processRequest(operation, url, payload, headers, contentType, responseType);
302 // If the submission was successful then we're done.
304 if (!shouldRetry(result)) {
306 logger.info(RestClientMsgs.HTTP_REQUEST_TIME_WITH_RETRIES, operation.getRequestType().toString(),url,
307 Long.toString(System.currentTimeMillis() - startTimeInMs),
308 Integer.toString(retryCount));
310 result.setNumRetries(retryCount);
315 // Our submission was unsuccessful...
317 // Sleep between re-tries to be nice to the target system.
320 } catch (InterruptedException e) {
321 logger.error(RestClientMsgs.HTTP_REQUEST_INTERRUPTED, url, e.getLocalizedMessage());
326 // If we've gotten this far, then we failed all of our retries.
327 if (result == null) {
328 result = new OperationResult();
331 result.setNumRetries(numRetries);
332 result.setResultCode(504);
333 result.setFailureCause("Failed to get a successful result after multiple retries to target server.");
340 * This method operates on a REST endpoint by submitting an HTTP operation request against the
343 * @param operation - the REST operation type to send to the url
344 * @param url - The REST endpoint to submit the REST request to.
345 * @param payload - They payload to provide in the REST request, if applicable
346 * @param headers - The headers that should be passed in the request
347 * @param contentType - The content type of the payload
348 * @param responseType - The expected format of the response.
350 * @return The result of the REST request.
352 protected OperationResult processRequest(RestOperation operation, String url, String payload,
353 Map<String, List<String>> headers, MediaType contentType, MediaType responseType) {
355 ClientResponse clientResponse = null;
356 OperationResult operationResult = new OperationResult();
357 ByteArrayOutputStream baos = new ByteArrayOutputStream();
359 String requestType = operation.getRequestType().name();
361 // Grab the current time so that we can log how long the
362 // query took once we are done.
363 long startTimeInMs = System.currentTimeMillis();
364 MdcOverride override = new MdcOverride();
365 override.addAttribute(MdcContext.MDC_START_TIME, formatter.format(startTimeInMs));
367 logger.info(RestClientMsgs.HTTP_REQUEST, requestType, url);
371 // Get a REST client instance for our request.
372 Client client = getClient();
374 // Debug log the request
375 debugRequest(url, payload, headers, responseType);
377 // Get a client request builder, and submit our GET request.
378 Builder builder = getClientBuilder(client, url, payload, headers, contentType, responseType);
379 clientResponse = operation.processOperation(builder);
381 populateOperationResult(clientResponse, operationResult);
383 // Debug log the response
384 debugResponse(operationResult, clientResponse.getHeaders());
386 } catch (Exception ex) {
388 logger.error(RestClientMsgs.HTTP_REQUEST_ERROR, requestType, url, ex.getLocalizedMessage());
389 operationResult.setResultCode(500);
390 operationResult.setFailureCause(
391 "Error during GET operation to AAI with message = " + ex.getLocalizedMessage());
395 if (logger.isDebugEnabled()) {
396 logger.debug(baos.toString());
399 // Not every valid response code is actually represented by the Response.Status
400 // object, so we need to guard against missing codes, otherwise we throw null
401 // pointer exceptions when we try to generate our metrics logs...
402 Response.Status responseStatus =
403 Response.Status.fromStatusCode(operationResult.getResultCode());
404 String responseStatusCodeString = "";
405 if (responseStatus != null) {
406 responseStatusCodeString = responseStatus.toString();
409 metricsLogger.info(RestClientMsgs.HTTP_REQUEST_TIME,
410 new LogFields().setField(LogLine.DefinedFields.STATUS_CODE, responseStatusCodeString)
411 .setField(LogLine.DefinedFields.RESPONSE_CODE, operationResult.getResultCode())
412 .setField(LogLine.DefinedFields.RESPONSE_DESCRIPTION, operationResult.getResult()),
413 override, requestType, Long.toString(System.currentTimeMillis() - startTimeInMs), url);
414 logger.info(RestClientMsgs.HTTP_REQUEST_TIME, requestType,
415 Long.toString(System.currentTimeMillis() - startTimeInMs), url);
416 logger.info(RestClientMsgs.HTTP_RESPONSE, url,
417 operationResult.getResultCode() + " " + responseStatusCodeString);
420 return operationResult;
424 * This method submits an HTTP PUT request against the supplied URL.
426 * @param url - The REST endpoint to submit the PUT request to.
427 * @param payload - the payload to send to the supplied URL
428 * @param headers - The headers that should be passed in the request
429 * @param contentType - The content type of the payload
430 * @param responseType - The expected format of the response.
432 * @return The result of the PUT request.
434 public OperationResult put(String url, String payload, Map<String, List<String>> headers,
435 MediaType contentType, MediaType responseType) {
436 return processRequest(putOp, url, payload, headers, contentType, responseType);
440 * This method submits an HTTP POST request against the supplied URL.
442 * @param url - The REST endpoint to submit the POST request to.
443 * @param payload - the payload to send to the supplied URL
444 * @param headers - The headers that should be passed in the request
445 * @param contentType - The content type of the payload
446 * @param responseType - The expected format of the response.
448 * @return The result of the POST request.
450 public OperationResult post(String url, String payload, Map<String, List<String>> headers,
451 MediaType contentType, MediaType responseType) {
452 return processRequest(postOp, url, payload, headers, contentType, responseType);
456 * This method submits an HTTP POST request against the supplied URL, and emulates a PATCH
457 * operation by setting a special header value
459 * @param url - The REST endpoint to submit the POST request to.
460 * @param payload - the payload to send to the supplied URL
461 * @param headers - The headers that should be passed in the request
462 * @param contentType - The content type of the payload
463 * @param responseType - The expected format of the response.
465 * @return The result of the POST request.
467 public OperationResult patch(String url, String payload, Map<String, List<String>> headers,
468 MediaType contentType, MediaType responseType) {
469 return processRequest(patchOp, url, payload, headers, contentType, responseType);
474 * This method submits an HTTP HEAD request against the supplied URL
476 * @param url - The REST endpoint to submit the POST request to.
477 * @param headers - The headers that should be passed in the request
478 * @param responseType - The expected format of the response.
480 * @return The result of the POST request.
482 public OperationResult head(String url, Map<String, List<String>> headers,
483 MediaType responseType) {
484 return processRequest(headOp, url, null, headers, null, responseType);
488 * This method submits an HTTP GET request against the supplied URL.
490 * @param url - The REST endpoint to submit the GET request to.
491 * @param headers - The headers that should be passed in the request
492 * @param responseType - The expected format of the response.
494 * @return The result of the GET request.
496 public OperationResult get(String url, Map<String, List<String>> headers,
497 MediaType responseType) {
498 return processRequest(getOp, url, null, headers, null, responseType);
502 * This method submits an HTTP GET request against the supplied URL.
503 * This variant of the method will perform a requested number of retries in the event that the
504 * first request is unsuccessful.
506 * @param url - The REST endpoint to submit the GET request to.
507 * @param headers - The headers that should be passed in the request
508 * @param responseType - The expected format of the response.
509 * @param numRetries - The number of times to try resubmitting the request in the event of a
512 * @return The result of the GET request.
514 public OperationResult get(String url, Map<String, List<String>> headers, MediaType responseType,
516 return processRequest(getOp, url, null, headers, null, responseType, numRetries);
520 * This method submits an HTTP DELETE request against the supplied URL.
522 * @param url - The REST endpoint to submit the DELETE request to.
523 * @param headers - The headers that should be passed in the request
524 * @param responseType - The expected format of the response.
526 * @return The result of the DELETE request.
528 public OperationResult delete(String url, Map<String, List<String>> headers,
529 MediaType responseType) {
530 return processRequest(deleteOp, url, null, headers, null, responseType);
534 * This method does a health check ("ping") against the supplied URL.
536 * @param url - The REST endpoint to attempt a health check.
537 * @param srcAppName - The name of the application using this client.
538 * @param destAppName - The name of the destination app.
540 * @return A boolean value. True if connection attempt was successful, false otherwise.
543 public boolean healthCheck(String url, String srcAppName, String destAppName) {
544 return healthCheck(url, srcAppName, destAppName, MediaType.TEXT_PLAIN_TYPE);
549 * This method does a health check ("ping") against the supplied URL.
551 * @param url - The REST endpoint to attempt a health check.
552 * @param srcAppName - The name of the application using this client.
553 * @param destAppName - The name of the destination app.
554 * @param responseType - The response type.
556 * @return A boolean value. True if connection attempt was successful, false otherwise.
559 public boolean healthCheck(String url, String srcAppName, String destAppName,
560 MediaType responseType) {
561 MultivaluedMap<String, String> headers = new MultivaluedMapImpl();
562 headers.put(Headers.FROM_APP_ID, Arrays.asList(new String[] {srcAppName}));
563 headers.put(Headers.TRANSACTION_ID, Arrays.asList(new String[] {UUID.randomUUID().toString()}));
566 logger.info(RestClientMsgs.HEALTH_CHECK_ATTEMPT, destAppName, url);
567 OperationResult result = get(url, headers, responseType);
569 if (result != null && result.getFailureCause() == null) {
570 logger.info(RestClientMsgs.HEALTH_CHECK_SUCCESS, destAppName, url);
573 logger.error(RestClientMsgs.HEALTH_CHECK_FAILURE, destAppName, url, result != null ? result.getFailureCause()
577 } catch (Exception e) {
578 logger.error(RestClientMsgs.HEALTH_CHECK_FAILURE, destAppName, url, e.getMessage());
584 * This method constructs a client request builder that can be used for submitting REST requests
585 * to the supplied URL endpoint.
587 * @param client - The REST client we will be using to talk to the server.
588 * @param url - The URL endpoint that our request will be submitted to.
589 * @param headers - The headers that should be passed in the request
590 * @param contentType - the content type of the payload
591 * @param responseType - The expected format of the response.
593 * @return A client request builder.
595 private Builder getClientBuilder(Client client, String url, String payload,
596 Map<String, List<String>> headers, MediaType contentType, MediaType responseType) {
598 WebResource resource = client.resource(url);
599 Builder builder = resource.accept(responseType);
601 if (contentType != null) {
602 builder.type(contentType);
605 if (payload != null) {
606 builder.entity(payload);
609 if (headers != null) {
610 for (Entry<String, List<String>> header : headers.entrySet()) {
611 builder.header(header.getKey(), String.join(";",header.getValue()));
614 //Added additional check to prevent adding duplicate authorization header if client is already sending the authorization header
615 // AAI-1097 - For AAI calls when Rest authentication mode is selected as SSL_BASIC getting 403 error
616 if (clientBuilder.getAuthenticationMode() == RestAuthenticationMode.SSL_BASIC && headers.get(Headers.AUTHORIZATION) == null) {
617 builder = builder.header(Headers.AUTHORIZATION,
618 clientBuilder.getBasicAuthenticationCredentials());
626 private void debugRequest(String url, String payload, Map<String, List<String>> headers,
627 MediaType responseType) {
628 if (!logger.isDebugEnabled()) {
632 StringBuilder debugRequest = new StringBuilder("REQUEST:\n");
633 debugRequest.append("URL: ").append(url).append("\n");
634 debugRequest.append("Payload: ").append(payload).append("\n");
635 debugRequest.append("Response Type: ").append(responseType).append("\n");
637 if (headers == null) {
638 logger.debug(debugRequest.toString());
642 debugRequest.append("Headers: ");
643 for (Entry<String, List<String>> header : headers.entrySet()) {
644 debugRequest.append("\n\t").append(header.getKey()).append(":");
645 for (String headerEntry : header.getValue()) {
646 debugRequest.append("\"").append(headerEntry).append("\" ");
650 logger.debug(debugRequest.toString());
654 private void debugResponse(OperationResult operationResult,
655 MultivaluedMap<String, String> headers) {
657 if (!logger.isDebugEnabled()) {
661 StringBuilder debugResponse = new StringBuilder("RESPONSE:\n");
662 debugResponse.append("Result: ").append(operationResult.getResultCode()).append("\n");
663 debugResponse.append("Failure Cause: ").append(operationResult.getFailureCause()).append("\n");
664 debugResponse.append("Payload: ").append(operationResult.getResult()).append("\n");
666 if (headers == null) {
667 logger.debug(debugResponse.toString());
671 debugResponse.append("Headers: ");
672 for (Entry<String, List<String>> header : headers.entrySet()) {
673 debugResponse.append("\n\t").append(header.getKey()).append(":");
674 for (String headerEntry : header.getValue()) {
675 debugResponse.append("\"").append(headerEntry).append("\" ");
679 logger.debug(debugResponse.toString());
683 * This method creates an instance of the low level REST client to use for communicating with the
684 * AAI, if one has not already been created, otherwise it returns the already created instance.
686 * @return A {@link Client} instance.
688 protected Client getClient() throws Exception {
691 * Attempting a new way of doing non-blocking thread-safe lazy-initialization by using Java 1.8
692 * computeIfAbsent functionality. A null value will not be stored, but once a valid mapping has
693 * been established, then the same value will be returned.
695 * One awkwardness of the computeIfAbsent is the lack of support for thrown exceptions, which
696 * required a bit of hoop jumping to preserve the original exception for the purpose of
697 * maintaining the pre-existing this API signature.
700 final InitializedClient clientInstance =
701 CLIENT_CACHE.computeIfAbsent(REST_CLIENT_INSTANCE, k -> loggedClientInitialization());
703 if (clientInstance.getCaughtException() != null) {
704 throw new InstantiationException(clientInstance.getCaughtException().getMessage());
707 return clientInstance.getClient();
712 * This method will only be called if computerIfAbsent is true. The return value is null, then the result is not
715 * @return a new client instance or null
717 private InitializedClient loggedClientInitialization() {
719 if (logger.isDebugEnabled()) {
720 logger.debug("Instantiating REST client with following parameters:");
721 logger.debug(clientBuilder.toString());
724 InitializedClient initClient = new InitializedClient();
727 initClient.setClient(clientBuilder.getClient());
728 } catch ( Exception error) {
729 initClient.setCaughtException(error);
738 * This method populates the fields of an {@link OperationResult} instance based on the contents
739 * of a {@link ClientResponse} received in response to a REST request.
741 private void populateOperationResult(ClientResponse response, OperationResult opResult) {
743 // If we got back a NULL response, then just produce a generic
744 // error code and result indicating this.
745 if (response == null) {
746 opResult.setResultCode(500);
747 opResult.setFailureCause("Client response was null");
751 int statusCode = response.getStatus();
752 opResult.setResultCode(statusCode);
754 if (opResult.wasSuccessful()) {
755 if (statusCode != Response.Status.NO_CONTENT.getStatusCode()) {
756 opResult.setResult(response.getEntity(String.class));
759 opResult.setFailureCause(response.getEntity(String.class));
762 opResult.setHeaders(response.getHeaders());
765 private class GetRestOperation implements RestOperation {
766 public ClientResponse processOperation(Builder builder) {
767 return builder.get(ClientResponse.class);
770 public RequestType getRequestType() {
771 return RequestType.GET;
775 private class PutRestOperation implements RestOperation {
776 public ClientResponse processOperation(Builder builder) {
777 return builder.put(ClientResponse.class);
780 public RequestType getRequestType() {
781 return RequestType.PUT;
785 private class PostRestOperation implements RestOperation {
786 public ClientResponse processOperation(Builder builder) {
787 return builder.post(ClientResponse.class);
790 public RequestType getRequestType() {
791 return RequestType.POST;
795 private class DeleteRestOperation implements RestOperation {
796 public ClientResponse processOperation(Builder builder) {
797 return builder.delete(ClientResponse.class);
800 public RequestType getRequestType() {
801 return RequestType.DELETE;
805 private class HeadRestOperation implements RestOperation {
806 public ClientResponse processOperation(Builder builder) {
807 return builder.head();
810 public RequestType getRequestType() {
811 return RequestType.HEAD;
815 private class PatchRestOperation implements RestOperation {
818 * Technically there is no standarized PATCH operation for the
819 * jersey client, but we can use the method-override approach
822 public ClientResponse processOperation(Builder builder) {
823 builder = builder.header("X-HTTP-Method-Override", "PATCH");
824 return builder.post(ClientResponse.class);
827 public RequestType getRequestType() {
828 return RequestType.PATCH;
834 * Interface used wrap a Jersey REST call using a functional interface.
836 private interface RestOperation {
839 * Method used to wrap the functionality of making a REST call out to the endpoint.
841 * @param builder the Jersey builder used to make the request
842 * @return the response from the REST endpoint
844 public ClientResponse processOperation(Builder builder);
847 * Returns the REST request type.
849 public RequestType getRequestType();
852 * The supported REST request types.
854 public enum RequestType {
855 GET, PUT, POST, DELETE, PATCH, HEAD
860 * An entity to encapsulate an expected result and a potential failure cause when returning from a
861 * functional interface during the computeIfAbsent call.
863 private class InitializedClient {
864 private Client client;
865 private Throwable caughtException;
867 public InitializedClient() {
869 caughtException = null;
872 public Client getClient() {
875 public void setClient(Client client) {
876 this.client = client;
878 public Throwable getCaughtException() {
879 return caughtException;
881 public void setCaughtException(Throwable caughtException) {
882 this.caughtException = caughtException;