2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
6 * Copyright © 2017 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 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
23 package org.onap.aai.restclient.client;
25 import java.io.ByteArrayOutputStream;
26 import java.text.SimpleDateFormat;
27 import java.util.Arrays;
28 import java.util.List;
30 import java.util.Map.Entry;
31 import java.util.UUID;
32 import java.util.concurrent.ConcurrentHashMap;
33 import java.util.concurrent.ConcurrentMap;
35 import javax.ws.rs.core.MediaType;
36 import javax.ws.rs.core.MultivaluedMap;
37 import javax.ws.rs.core.Response;
39 import org.onap.aai.restclient.enums.RestAuthenticationMode;
40 import org.onap.aai.restclient.logging.RestClientMsgs;
41 import org.onap.aai.restclient.rest.RestClientBuilder;
42 import org.openecomp.cl.api.LogFields;
43 import org.openecomp.cl.api.LogLine;
44 import org.openecomp.cl.api.Logger;
45 import org.openecomp.cl.eelf.LoggerFactory;
46 import org.openecomp.cl.mdc.MdcContext;
47 import org.openecomp.cl.mdc.MdcOverride;
49 import com.sun.jersey.api.client.Client;
50 import com.sun.jersey.api.client.ClientResponse;
51 import com.sun.jersey.api.client.WebResource;
52 import com.sun.jersey.api.client.WebResource.Builder;
53 import com.sun.jersey.core.util.MultivaluedMapImpl;
57 * This class provides a general client implementation that micro services can use for communicating
58 * with the endpoints via their exposed REST interfaces.
62 public class RestClient {
65 * This is a generic builder that is used for constructing the REST client that we will use to
66 * communicate with the REST endpoint.
68 private RestClientBuilder clientBuilder;
70 private final ConcurrentMap<String,InitializedClient> CLIENT_CACHE = new ConcurrentHashMap<String,InitializedClient>();
71 private static final String REST_CLIENT_INSTANCE = "REST_CLIENT_INSTANCE";
73 /** Standard logger for producing log statements. */
74 private Logger logger = LoggerFactory.getInstance().getLogger("AAIRESTClient");
76 /** Standard logger for producing metric statements. */
77 private Logger metricsLogger = LoggerFactory.getInstance().getMetricsLogger("AAIRESTClient");
79 private SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");
81 /** Reusable function call for GET REST operations. */
82 private final RestOperation getOp = new GetRestOperation();
84 /** Reusable function call for PUT REST operations. */
85 private final RestOperation putOp = new PutRestOperation();
87 /** Reusable function call for POST REST operations. */
88 private final RestOperation postOp = new PostRestOperation();
90 /** Reusable function call for DELETE REST operations. */
91 private final RestOperation deleteOp = new DeleteRestOperation();
93 /** Reusable function call for HEAD REST operations. */
94 private final RestOperation headOp = new HeadRestOperation();
96 /** Reusable function call for PATCH REST operations. */
97 private final RestOperation patchOp = new PatchRestOperation();
101 * Creates a new instance of the {@link RestClient}.
103 public RestClient() {
105 clientBuilder = new RestClientBuilder();
111 * Creates a new instance of the {@link RestClient} using the supplied {@link RestClientBuilder}.
113 * @param rcBuilder - The REST client builder that this instance of the {@link RestClient} should
116 public RestClient(RestClientBuilder rcBuilder) {
117 clientBuilder = rcBuilder;
120 public RestClient authenticationMode(RestAuthenticationMode mode) {
121 logger.debug("Set rest authentication mode= " + mode);
122 clientBuilder.setAuthenticationMode(mode);
126 public RestClient basicAuthUsername(String username) {
127 logger.debug("Set SSL BasicAuth username = " + username);
128 clientBuilder.setBasicAuthUsername(username);
132 public RestClient basicAuthPassword(String password) {
134 * purposely not logging out the password, I guess we could obfuscate it if we really want to
137 clientBuilder.setBasicAuthPassword(password);
143 * Sets the flag to indicate whether or not validation should be performed against the host name
144 * of the server we are trying to communicate with.
146 * @parameter validate - Set to true to enable validation, false to disable
148 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
150 public RestClient validateServerHostname(boolean validate) {
151 logger.debug("Set validate server hostname = " + validate);
152 clientBuilder.setValidateServerHostname(validate);
158 * Sets the flag to indicate whether or not validation should be performed against the certificate
161 * @parameter validate - Set to true to enable validation, false to disable.
163 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
165 public RestClient validateServerCertChain(boolean validate) {
166 logger.debug("Set validate server certificate chain = " + validate);
167 clientBuilder.setValidateServerCertChain(validate);
173 * Assigns the client certificate file to use.
175 * @param filename - The name of the certificate file.
177 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
179 public RestClient clientCertFile(String filename) {
180 logger.debug("Set client certificate filename = " + filename);
181 clientBuilder.setClientCertFileName(filename);
187 * Assigns the client certificate password to use.
189 * @param password - The certificate password.
191 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
193 public RestClient clientCertPassword(String password) {
194 clientBuilder.setClientCertPassword(password);
200 * Assigns the name of the trust store file to use.
202 * @param filename - the name of the trust store file.
204 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
206 public RestClient trustStore(String filename) {
207 logger.debug("Set trust store filename = " + filename);
208 clientBuilder.setTruststoreFilename(filename);
214 * Assigns the connection timeout (in ms) to use when connecting to the target server.
216 * @param timeout - The length of time to wait in ms before timing out.
218 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
220 public RestClient connectTimeoutMs(int timeout) {
221 logger.debug("Set connection timeout = " + timeout + " ms");
222 clientBuilder.setConnectTimeoutInMs(timeout);
228 * Assigns the read timeout (in ms) to use when communicating with the target server.
230 * @param timeout The read timeout in milliseconds.
232 * @return The AAIRESTClient instance. This is useful for chaining parameter assignments.
234 public RestClient readTimeoutMs(int timeout) {
235 logger.debug("Set read timeout = " + timeout + " ms");
236 clientBuilder.setReadTimeoutInMs(timeout);
240 private boolean shouldRetry(OperationResult operationResult) {
242 if (operationResult == null) {
246 int resultCode = operationResult.getResultCode();
248 if (resultCode == 200) {
252 if (resultCode == 404) {
261 * This method operates on a REST endpoint by submitting an HTTP operation request against the
263 * This variant of the method will perform a requested number of retries in the event that the
264 * first request is unsuccessful.
266 * @param operation - the REST operation type to send to the url
267 * @param url - The REST endpoint to submit the REST request to.
268 * @param payload - They payload to provide in the REST request, if applicable
269 * @param headers - The headers that should be passed in the request
270 * @param contentType - The content type of the payload
271 * @param responseType - The expected format of the response.
273 * @return The result of the REST request.
275 protected OperationResult processRequest(RestOperation operation, String url, String payload,
276 Map<String, List<String>> headers, MediaType contentType, MediaType responseType,
280 OperationResult result = null;
282 long startTimeInMs = System.currentTimeMillis();
283 for (int retryCount = 0; retryCount < numRetries; retryCount++) {
285 logger.info(RestClientMsgs.HTTP_REQUEST_WITH_RETRIES, operation.getRequestType().toString(),
286 url, Integer.toString(retryCount + 1));
288 // Submit our query to the AAI.
289 result = processRequest(operation, url, payload, headers, contentType, responseType);
291 // If the submission was successful then we're done.
293 if (!shouldRetry(result)) {
295 logger.info(RestClientMsgs.HTTP_REQUEST_TIME_WITH_RETRIES, operation.getRequestType().toString(),url,
296 Long.toString(System.currentTimeMillis() - startTimeInMs),
297 Integer.toString(retryCount));
299 result.setNumRetries(retryCount);
304 // Our submission was unsuccessful...
306 // Sleep between re-tries to be nice to the target system.
309 } catch (InterruptedException e) {
310 logger.error(RestClientMsgs.HTTP_REQUEST_INTERRUPTED, url, e.getLocalizedMessage());
315 // If we've gotten this far, then we failed all of our retries.
316 result.setNumRetries(numRetries);
317 result.setResultCode(504);
318 result.setFailureCause(
319 "Failed to get a successful result after multiple retries to target server.");
325 * This method operates on a REST endpoint by submitting an HTTP operation request against the
328 * @param operation - the REST operation type to send to the url
329 * @param url - The REST endpoint to submit the REST request to.
330 * @param payload - They payload to provide in the REST request, if applicable
331 * @param headers - The headers that should be passed in the request
332 * @param contentType - The content type of the payload
333 * @param responseType - The expected format of the response.
335 * @return The result of the REST request.
337 protected OperationResult processRequest(RestOperation operation, String url, String payload,
338 Map<String, List<String>> headers, MediaType contentType, MediaType responseType) {
340 ClientResponse clientResponse = null;
341 OperationResult operationResult = new OperationResult();
342 ByteArrayOutputStream baos = new ByteArrayOutputStream();
344 String requestType = operation.getRequestType().name();
346 // Grab the current time so that we can log how long the
347 // query took once we are done.
348 long startTimeInMs = System.currentTimeMillis();
349 MdcOverride override = new MdcOverride();
350 override.addAttribute(MdcContext.MDC_START_TIME, formatter.format(startTimeInMs));
352 logger.info(RestClientMsgs.HTTP_REQUEST, requestType, url);
356 // Get a REST client instance for our request.
357 Client client = getClient();
359 // Debug log the request
360 debugRequest(url, payload, headers, responseType);
362 // Get a client request builder, and submit our GET request.
363 Builder builder = getClientBuilder(client, url, payload, headers, contentType, responseType);
364 clientResponse = operation.processOperation(builder);
366 populateOperationResult(clientResponse, operationResult);
368 // Debug log the response
369 debugResponse(operationResult, clientResponse.getHeaders());
371 } catch (Exception ex) {
373 logger.error(RestClientMsgs.HTTP_REQUEST_ERROR, requestType, url, ex.getLocalizedMessage());
374 operationResult.setResultCode(500);
375 operationResult.setFailureCause(
376 "Error during GET operation to AAI with message = " + ex.getLocalizedMessage());
380 if (logger.isDebugEnabled()) {
381 logger.debug(baos.toString());
384 // Not every valid response code is actually represented by the Response.Status
385 // object, so we need to guard against missing codes, otherwise we throw null
386 // pointer exceptions when we try to generate our metrics logs...
387 Response.Status responseStatus =
388 Response.Status.fromStatusCode(operationResult.getResultCode());
389 String responseStatusCodeString = "";
390 if (responseStatus != null) {
391 responseStatusCodeString = responseStatus.toString();
394 metricsLogger.info(RestClientMsgs.HTTP_REQUEST_TIME,
395 new LogFields().setField(LogLine.DefinedFields.STATUS_CODE, responseStatusCodeString)
396 .setField(LogLine.DefinedFields.RESPONSE_CODE, operationResult.getResultCode())
397 .setField(LogLine.DefinedFields.RESPONSE_DESCRIPTION, operationResult.getResult()),
398 override, requestType, Long.toString(System.currentTimeMillis() - startTimeInMs), url);
399 logger.info(RestClientMsgs.HTTP_REQUEST_TIME, requestType,
400 Long.toString(System.currentTimeMillis() - startTimeInMs), url);
401 logger.info(RestClientMsgs.HTTP_RESPONSE, url,
402 operationResult.getResultCode() + " " + responseStatusCodeString);
405 return operationResult;
409 * This method submits an HTTP PUT request against the supplied URL.
411 * @param url - The REST endpoint to submit the PUT request to.
412 * @param payload - the payload to send to the supplied URL
413 * @param headers - The headers that should be passed in the request
414 * @param contentType - The content type of the payload
415 * @param responseType - The expected format of the response.
417 * @return The result of the PUT request.
419 public OperationResult put(String url, String payload, Map<String, List<String>> headers,
420 MediaType contentType, MediaType responseType) {
421 return processRequest(putOp, url, payload, headers, contentType, responseType);
425 * This method submits an HTTP POST request against the supplied URL.
427 * @param url - The REST endpoint to submit the POST request to.
428 * @param payload - the payload to send to the supplied URL
429 * @param headers - The headers that should be passed in the request
430 * @param contentType - The content type of the payload
431 * @param responseType - The expected format of the response.
433 * @return The result of the POST request.
435 public OperationResult post(String url, String payload, Map<String, List<String>> headers,
436 MediaType contentType, MediaType responseType) {
437 return processRequest(postOp, url, payload, headers, contentType, responseType);
441 * This method submits an HTTP POST request against the supplied URL, and emulates a PATCH
442 * operation by setting a special header value
444 * @param url - The REST endpoint to submit the POST request to.
445 * @param payload - the payload to send to the supplied URL
446 * @param headers - The headers that should be passed in the request
447 * @param contentType - The content type of the payload
448 * @param responseType - The expected format of the response.
450 * @return The result of the POST request.
452 public OperationResult patch(String url, String payload, Map<String, List<String>> headers,
453 MediaType contentType, MediaType responseType) {
454 return processRequest(patchOp, url, payload, headers, contentType, responseType);
459 * This method submits an HTTP HEAD request against the supplied URL
461 * @param url - The REST endpoint to submit the POST request to.
462 * @param headers - The headers that should be passed in the request
463 * @param responseType - The expected format of the response.
465 * @return The result of the POST request.
467 public OperationResult head(String url, Map<String, List<String>> headers,
468 MediaType responseType) {
469 return processRequest(headOp, url, null, headers, null, responseType);
473 * This method submits an HTTP GET request against the supplied URL.
475 * @param url - The REST endpoint to submit the GET request to.
476 * @param headers - The headers that should be passed in the request
477 * @param responseType - The expected format of the response.
479 * @return The result of the GET request.
481 public OperationResult get(String url, Map<String, List<String>> headers,
482 MediaType responseType) {
483 return processRequest(getOp, url, null, headers, null, responseType);
487 * This method submits an HTTP GET request against the supplied URL.
488 * This variant of the method will perform a requested number of retries in the event that the
489 * first request is unsuccessful.
491 * @param url - The REST endpoint to submit the GET request to.
492 * @param headers - The headers that should be passed in the request
493 * @param responseType - The expected format of the response.
494 * @param numRetries - The number of times to try resubmitting the request in the event of a
497 * @return The result of the GET request.
499 public OperationResult get(String url, Map<String, List<String>> headers, MediaType responseType,
501 return processRequest(getOp, url, null, headers, null, responseType, numRetries);
505 * This method submits an HTTP DELETE request against the supplied URL.
507 * @param url - The REST endpoint to submit the DELETE request to.
508 * @param headers - The headers that should be passed in the request
509 * @param responseType - The expected format of the response.
511 * @return The result of the DELETE request.
513 public OperationResult delete(String url, Map<String, List<String>> headers,
514 MediaType responseType) {
515 return processRequest(deleteOp, url, null, headers, null, responseType);
519 * This method does a health check ("ping") against the supplied URL.
521 * @param url - The REST endpoint to attempt a health check.
522 * @param srcAppName - The name of the application using this client.
523 * @param destAppName - The name of the destination app.
525 * @return A boolean value. True if connection attempt was successful, false otherwise.
528 public boolean healthCheck(String url, String srcAppName, String destAppName) {
529 return healthCheck(url, srcAppName, destAppName, MediaType.TEXT_PLAIN_TYPE);
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.
539 * @param responseType - The response type.
541 * @return A boolean value. True if connection attempt was successful, false otherwise.
544 public boolean healthCheck(String url, String srcAppName, String destAppName,
545 MediaType responseType) {
546 MultivaluedMap<String, String> headers = new MultivaluedMapImpl();
547 headers.put(Headers.FROM_APP_ID, Arrays.asList(new String[] {srcAppName}));
548 headers.put(Headers.TRANSACTION_ID, Arrays.asList(new String[] {UUID.randomUUID().toString()}));
551 logger.info(RestClientMsgs.HEALTH_CHECK_ATTEMPT, destAppName, url);
552 OperationResult result = get(url, headers, responseType);
554 if (result != null && result.getFailureCause() == null) {
555 logger.info(RestClientMsgs.HEALTH_CHECK_SUCCESS, destAppName, url);
558 logger.error(RestClientMsgs.HEALTH_CHECK_FAILURE, destAppName, url,
559 result.getFailureCause());
562 } catch (Exception e) {
563 logger.error(RestClientMsgs.HEALTH_CHECK_FAILURE, destAppName, url, e.getMessage());
569 * This method constructs a client request builder that can be used for submitting REST requests
570 * to the supplied URL endpoint.
572 * @param client - The REST client we will be using to talk to the server.
573 * @param url - The URL endpoint that our request will be submitted to.
574 * @param headers - The headers that should be passed in the request
575 * @param contentType - the content type of the payload
576 * @param responseType - The expected format of the response.
578 * @return A client request builder.
580 private Builder getClientBuilder(Client client, String url, String payload,
581 Map<String, List<String>> headers, MediaType contentType, MediaType responseType) {
583 WebResource resource = client.resource(url);
584 Builder builder = null;
586 builder = resource.accept(responseType);
588 if (contentType != null) {
589 builder.type(contentType);
592 if (payload != null) {
593 builder.entity(payload);
596 if (headers != null) {
597 for (Entry<String, List<String>> header : headers.entrySet()) {
598 builder.header(header.getKey(), header.getValue());
601 if (clientBuilder.getAuthenticationMode() == RestAuthenticationMode.SSL_BASIC) {
602 builder = builder.header(Headers.AUTHORIZATION,
603 clientBuilder.getBasicAuthenticationCredentials());
611 private void debugRequest(String url, String payload, Map<String, List<String>> headers,
612 MediaType responseType) {
613 if (logger.isDebugEnabled()) {
614 StringBuilder debugRequest = new StringBuilder("REQUEST:\n");
615 debugRequest.append("URL: ").append(url).append("\n");
616 debugRequest.append("Payload: ").append(payload).append("\n");
617 debugRequest.append("Response Type: ").append(responseType).append("\n");
618 if (headers != null) {
619 debugRequest.append("Headers: ");
620 for (Entry<String, List<String>> header : headers.entrySet()) {
621 debugRequest.append("\n\t").append(header.getKey()).append(":");
622 for (String headerEntry : header.getValue()) {
623 debugRequest.append("\"").append(headerEntry).append("\" ");
627 logger.debug(debugRequest.toString());
631 private void debugResponse(OperationResult operationResult,
632 MultivaluedMap<String, String> headers) {
633 if (logger.isDebugEnabled()) {
634 StringBuilder debugResponse = new StringBuilder("RESPONSE:\n");
635 debugResponse.append("Result: ").append(operationResult.getResultCode()).append("\n");
636 debugResponse.append("Failure Cause: ").append(operationResult.getFailureCause())
638 debugResponse.append("Payload: ").append(operationResult.getResult()).append("\n");
639 if (headers != null) {
640 debugResponse.append("Headers: ");
641 for (Entry<String, List<String>> header : headers.entrySet()) {
642 debugResponse.append("\n\t").append(header.getKey()).append(":");
643 for (String headerEntry : header.getValue()) {
644 debugResponse.append("\"").append(headerEntry).append("\" ");
648 logger.debug(debugResponse.toString());
653 * This method creates an instance of the low level REST client to use for communicating with the
654 * AAI, if one has not already been created, otherwise it returns the already created instance.
656 * @return A {@link Client} instance.
658 protected Client getClient() throws Exception {
661 * Attempting a new way of doing non-blocking thread-safe lazy-initialization by using Java 1.8
662 * computeIfAbsent functionality. A null value will not be stored, but once a valid mapping has
663 * been established, then the same value will be returned.
665 * One awkwardness of the computeIfAbsent is the lack of support for thrown exceptions, which
666 * required a bit of hoop jumping to preserve the original exception for the purpose of
667 * maintaining the pre-existing this API signature.
670 final InitializedClient clientInstance =
671 CLIENT_CACHE.computeIfAbsent(REST_CLIENT_INSTANCE, k -> loggedClientInitialization());
673 if (clientInstance.getCaughtException() != null) {
674 throw new InstantiationException(clientInstance.getCaughtException().getMessage());
677 return clientInstance.getClient();
682 * This method will only be called if computerIfAbsent is true. The return value is null, then the result is not
685 * @return a new client instance or null
687 private InitializedClient loggedClientInitialization() {
689 if (logger.isDebugEnabled()) {
690 logger.debug("Instantiating REST client with following parameters:");
691 logger.debug(clientBuilder.toString());
694 InitializedClient initClient = new InitializedClient();
697 initClient.setClient(clientBuilder.getClient());
698 } catch ( Throwable error ) {
699 initClient.setCaughtException(error);
708 * This method populates the fields of an {@link OperationResult} instance based on the contents
709 * of a {@link ClientResponse} received in response to a REST request.
711 private void populateOperationResult(ClientResponse response, OperationResult opResult) {
713 // If we got back a NULL response, then just produce a generic
714 // error code and result indicating this.
715 if (response == null) {
716 opResult.setResultCode(500);
717 opResult.setFailureCause("Client response was null");
721 int statusCode = response.getStatus();
722 opResult.setResultCode(statusCode);
724 if (opResult.wasSuccessful()) {
725 if (statusCode != Response.Status.NO_CONTENT.getStatusCode()) {
726 opResult.setResult(response.getEntity(String.class));
729 opResult.setFailureCause(response.getEntity(String.class));
732 opResult.setHeaders(response.getHeaders());
735 private class GetRestOperation implements RestOperation {
736 public ClientResponse processOperation(Builder builder) {
737 return builder.get(ClientResponse.class);
740 public RequestType getRequestType() {
741 return RequestType.GET;
745 private class PutRestOperation implements RestOperation {
746 public ClientResponse processOperation(Builder builder) {
747 return builder.put(ClientResponse.class);
750 public RequestType getRequestType() {
751 return RequestType.PUT;
755 private class PostRestOperation implements RestOperation {
756 public ClientResponse processOperation(Builder builder) {
757 return builder.post(ClientResponse.class);
760 public RequestType getRequestType() {
761 return RequestType.POST;
765 private class DeleteRestOperation implements RestOperation {
766 public ClientResponse processOperation(Builder builder) {
767 return builder.delete(ClientResponse.class);
770 public RequestType getRequestType() {
771 return RequestType.DELETE;
775 private class HeadRestOperation implements RestOperation {
776 public ClientResponse processOperation(Builder builder) {
777 return builder.head();
780 public RequestType getRequestType() {
781 return RequestType.HEAD;
785 private class PatchRestOperation implements RestOperation {
788 * Technically there is no standarized PATCH operation for the
789 * jersey client, but we can use the method-override approach
792 public ClientResponse processOperation(Builder builder) {
793 builder = builder.header("X-HTTP-Method-Override", "PATCH");
794 return builder.post(ClientResponse.class);
797 public RequestType getRequestType() {
798 return RequestType.PATCH;
804 * Interface used wrap a Jersey REST call using a functional interface.
806 private interface RestOperation {
809 * Method used to wrap the functionality of making a REST call out to the endpoint.
811 * @param builder the Jersey builder used to make the request
812 * @return the response from the REST endpoint
814 public ClientResponse processOperation(Builder builder);
817 * Returns the REST request type.
819 public RequestType getRequestType();
822 * The supported REST request types.
824 public enum RequestType {
825 GET, PUT, POST, DELETE, PATCH, HEAD
830 * An entity to encapsulate an expected result and a potential failure cause when returning from a
831 * functional interface during the computeIfAbsent call.
833 private class InitializedClient {
834 private Client client;
835 private Throwable caughtException;
837 public InitializedClient() {
839 caughtException = null;
842 public Client getClient() {
845 public void setClient(Client client) {
846 this.client = client;
848 public Throwable getCaughtException() {
849 return caughtException;
851 public void setCaughtException(Throwable caughtException) {
852 this.caughtException = caughtException;