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.datarouter.policy;
23 import java.io.FileNotFoundException;
24 import java.io.IOException;
25 import java.security.NoSuchAlgorithmException;
26 import java.util.ArrayList;
27 import java.util.Arrays;
28 import java.util.Collection;
29 import java.util.HashMap;
30 import java.util.Iterator;
31 import java.util.List;
34 import org.apache.camel.Exchange;
35 import org.apache.camel.Processor;
36 import org.eclipse.persistence.dynamic.DynamicType;
37 import org.eclipse.persistence.internal.helper.DatabaseField;
38 import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
39 import org.json.JSONException;
40 import org.json.JSONObject;
41 import org.onap.aai.cl.api.Logger;
42 import org.onap.aai.cl.eelf.LoggerFactory;
43 import org.onap.aai.cl.mdc.MdcContext;
44 import org.onap.aai.datarouter.entity.SpikeEventEntity;
45 import org.onap.aai.datarouter.entity.DocumentStoreDataEntity;
46 import org.onap.aai.datarouter.entity.SpikeEventVertex;
47 import org.onap.aai.datarouter.entity.OxmEntityDescriptor;
48 import org.onap.aai.datarouter.logging.EntityEventPolicyMsgs;
49 import org.onap.aai.datarouter.util.EntityOxmReferenceHelper;
50 import org.onap.aai.datarouter.util.ExternalOxmModelProcessor;
51 import org.onap.aai.datarouter.util.OxmModelLoader;
52 import org.onap.aai.datarouter.util.RouterServiceUtil;
53 import org.onap.aai.datarouter.util.SearchServiceAgent;
54 import org.onap.aai.restclient.client.Headers;
55 import org.onap.aai.restclient.client.OperationResult;
56 import org.onap.aai.restclient.rest.HttpUtil;
59 import com.fasterxml.jackson.core.JsonProcessingException;
60 import com.fasterxml.jackson.databind.JsonNode;
61 import com.fasterxml.jackson.databind.ObjectMapper;
62 import com.fasterxml.jackson.databind.ObjectWriter;
64 public class SpikeEntityEventPolicy implements Processor {
66 public static final String additionalInfo = "Response of SpikeEntityEventPolicy";
67 private static final String ENTITY_SEARCH_SCHEMA = "entitysearch_schema.json";
69 private Collection<ExternalOxmModelProcessor> externalOxmModelProcessors;
72 private static final String ACTION_CREATE = "create";
73 private static final String EVENT_VERTEX = "vertex";
74 private static final String ACTION_DELETE = "delete";
75 private static final String ACTION_UPDATE = "update";
76 private static final String PROCESS_SPIKE_EVENT = "Process Spike Event";
77 private static final String OPERATION_KEY = "operation";
80 private static final List<String> SUPPORTED_ACTIONS =
81 Arrays.asList(ACTION_CREATE, ACTION_UPDATE, ACTION_DELETE);
83 Map<String, DynamicJAXBContext> oxmVersionContextMap = new HashMap<>();
84 private String oxmVersion = null;
86 /** Agent for communicating with the Search Service. */
87 private SearchServiceAgent searchAgent = null;
88 private String entitySearchIndex;
90 private Logger logger;
91 private Logger metricsLogger;
93 public enum ResponseType {
94 SUCCESS, PARTIAL_SUCCESS, FAILURE;
97 public SpikeEntityEventPolicy(SpikeEntityEventPolicyConfig config) throws FileNotFoundException {
98 LoggerFactory loggerFactoryInstance = LoggerFactory.getInstance();
99 logger = loggerFactoryInstance.getLogger(SpikeEntityEventPolicy.class.getName());
100 metricsLogger = loggerFactoryInstance.getMetricsLogger(SpikeEntityEventPolicy.class.getName());
103 //srcDomain = config.getSourceDomain();
105 // Populate the index names.
106 entitySearchIndex = config.getSearchEntitySearchIndex();
108 // Instantiate the agent that we will use for interacting with the Search Service.
109 searchAgent = new SearchServiceAgent(config.getSearchCertName(), config.getSearchKeystore(),
110 config.getSearchKeystorePwd(),
111 EntityEventPolicy.concatSubUri(config.getSearchBaseUrl(), config.getSearchEndpoint()),
112 config.getSearchEndpointDocuments(), logger);
114 this.externalOxmModelProcessors = new ArrayList<>();
115 this.externalOxmModelProcessors.add(EntityOxmReferenceHelper.getInstance());
116 OxmModelLoader.registerExternalOxmModelProcessors(externalOxmModelProcessors);
117 OxmModelLoader.loadModels();
118 oxmVersionContextMap = OxmModelLoader.getVersionContextMap();
119 parseLatestOxmVersion();
122 private void parseLatestOxmVersion() {
123 int latestVersion = -1;
124 if (oxmVersionContextMap != null) {
125 Iterator it = oxmVersionContextMap.entrySet().iterator();
126 while (it.hasNext()) {
127 Map.Entry pair = (Map.Entry) it.next();
129 String version = pair.getKey().toString();
130 int versionNum = Integer.parseInt(version.substring(1, version.length()));
132 if (versionNum > latestVersion) {
133 latestVersion = versionNum;
134 oxmVersion = pair.getKey().toString();
137 logger.info(EntityEventPolicyMsgs.PROCESS_OXM_MODEL_FOUND, pair.getKey().toString());
140 logger.error(EntityEventPolicyMsgs.PROCESS_OXM_MODEL_MISSING, "");
144 public void startup() {
146 // Create the indexes in the search service if they do not already exist.
147 searchAgent.createSearchIndex(entitySearchIndex, ENTITY_SEARCH_SCHEMA);
148 logger.info(EntityEventPolicyMsgs.ENTITY_EVENT_POLICY_REGISTERED);
153 * Convert object to json.
155 * @param object the object
156 * @param pretty the pretty
158 * @throws JsonProcessingException the json processing exception
160 public static String convertObjectToJson(Object object, boolean pretty)
161 throws JsonProcessingException {
165 ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
168 ow = new ObjectMapper().writer();
171 return ow.writeValueAsString(object);
174 public void returnWithError(Exchange exchange, String payload, String errorMsg) {
175 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE, errorMsg);
176 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE, errorMsg, payload);
177 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
180 public boolean isJSONValid(String test) {
182 new JSONObject(test);
183 } catch (JSONException ex) {
190 public void process(Exchange exchange) throws Exception {
192 long startTime = System.currentTimeMillis();
193 String uebPayload = exchange.getIn().getBody().toString();
194 if (uebPayload == null || !isJSONValid(uebPayload)) {
195 uebPayload = exchange.getIn().getBody(String.class);
196 if (uebPayload == null || !isJSONValid(uebPayload)) {
197 returnWithError(exchange, uebPayload, "Invalid Payload");
203 JSONObject mainJson = new JSONObject(uebPayload);
204 String action = mainJson.getString(OPERATION_KEY);
205 if (action == null || !SUPPORTED_ACTIONS.contains(action.toLowerCase())) {
206 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE,
207 "Unrecognized action '" + action + "'", uebPayload);
208 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE,
209 "Unrecognized action '" + action + "'");
210 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
214 // Load the UEB payload data, any errors will result in a failure and discard
216 JSONObject spikeObjVertex = getUebContentAsJson(uebPayload, EVENT_VERTEX);
217 if (spikeObjVertex == null) {
218 returnWithError(exchange, uebPayload, "Payload is missing " + EVENT_VERTEX);
222 SpikeEventVertex eventVertex = initializeSpikeEventVertex(spikeObjVertex.toString());
224 DynamicJAXBContext oxmJaxbContext = loadOxmContext(oxmVersion.toLowerCase());
225 if (oxmJaxbContext == null) {
226 logger.error(EntityEventPolicyMsgs.OXM_VERSION_NOT_SUPPORTED, oxmVersion);
227 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE, "OXM version mismatch", uebPayload);
229 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
235 String entityType = eventVertex.getType();
236 if (entityType == null || entityType.isEmpty()) {
237 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE,
238 "Payload header missing entity type", uebPayload);
239 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE,
240 "Payload header missing entity type");
242 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
246 String entityKey = eventVertex.getKey();
247 if (entityKey == null || entityKey.isEmpty()) {
248 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE, "Payload vertex missing entity key",
250 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE,
251 "Payload vertex missing entity key");
253 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
256 String entityLink = eventVertex.getEntityLink();
257 if (entityLink == null || entityLink.isEmpty()) {
258 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE,
259 "Payload header missing entity link", uebPayload);
260 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE,
261 "Payload header missing entity link");
263 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
267 // log the fact that all data are in good shape
268 logger.info(EntityEventPolicyMsgs.PROCESS_ENTITY_EVENT_POLICY_NONVERBOSE, action, entityType);
269 logger.debug(EntityEventPolicyMsgs.PROCESS_ENTITY_EVENT_POLICY_VERBOSE, action, entityType,
273 // Process for building SpikeEventEntity object
274 String[] entityTypeArr = entityType.split("-");
275 String oxmEntityType = "";
276 for (String entityWord : entityTypeArr) {
277 oxmEntityType += entityWord.substring(0, 1).toUpperCase() + entityWord.substring(1);
280 List<String> searchableAttr =
281 getOxmAttributes(oxmJaxbContext, oxmEntityType, entityType, "searchable");
282 if (searchableAttr == null) {
283 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE,
284 "Searchable attribute not found for payload entity type '" + entityType + "'");
285 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE,
286 "Searchable attribute not found for payload entity type '" + entityType + "'",
289 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
293 String entityPrimaryKeyFieldName =
294 getEntityPrimaryKeyFieldName(oxmJaxbContext, uebPayload, oxmEntityType, entityType);
295 if (entityPrimaryKeyFieldName == null) {
296 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE,
297 "Payload missing primary key attribute");
298 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE,
299 "Payload missing primary key attribute", uebPayload);
300 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
303 String entityPrimaryKeyFieldValue = lookupValueUsingKey(uebPayload, entityPrimaryKeyFieldName);
304 if (entityPrimaryKeyFieldValue.isEmpty()) {
305 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE,
306 "Payload missing primary value attribute");
307 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE,
308 "Payload missing primary value attribute", uebPayload);
310 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
314 SpikeEventEntity spikeEventEntity = new SpikeEventEntity();
317 * Use the OXM Model to determine the primary key field name based on the entity-type
320 spikeEventEntity.setEntityPrimaryKeyName(entityPrimaryKeyFieldName);
321 spikeEventEntity.setEntityPrimaryKeyValue(entityPrimaryKeyFieldValue);
322 spikeEventEntity.setEntityType(entityType);
323 spikeEventEntity.setLink(entityLink);
325 if (!getSearchTags(spikeEventEntity, searchableAttr, uebPayload, action)) {
326 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_NONVERBOSE,
327 "Payload missing searchable attribute for entity type '" + entityType + "'");
328 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE,
329 "Payload missing searchable attribute for entity type '" + entityType + "'", uebPayload);
331 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
336 spikeEventEntity.deriveFields();
338 } catch (NoSuchAlgorithmException e) {
339 logger.error(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE, "Cannot create unique SHA digest");
340 logger.debug(EntityEventPolicyMsgs.DISCARD_EVENT_VERBOSE, "Cannot create unique SHA digest",
343 setResponse(exchange, ResponseType.FAILURE, additionalInfo);
348 handleSearchServiceOperation(spikeEventEntity, action, entitySearchIndex);
350 long stopTime = System.currentTimeMillis();
351 metricsLogger.info(EntityEventPolicyMsgs.OPERATION_RESULT_NO_ERRORS, PROCESS_SPIKE_EVENT,
352 String.valueOf(stopTime - startTime));
354 setResponse(exchange, ResponseType.SUCCESS, additionalInfo);
360 private void setResponse(Exchange exchange, ResponseType responseType, String additionalInfo) {
362 exchange.getOut().setHeader("ResponseType", responseType.toString());
363 exchange.getOut().setBody(additionalInfo);
368 * Load the UEB JSON payload, any errors would result to a failure case response.
370 private JSONObject getUebContentAsJson(String payload, String contentKey) {
372 JSONObject uebJsonObj;
373 JSONObject uebObjContent;
376 uebJsonObj = new JSONObject(payload);
377 } catch (JSONException e) {
378 logger.debug(EntityEventPolicyMsgs.UEB_INVALID_PAYLOAD_JSON_FORMAT, payload);
379 logger.error(EntityEventPolicyMsgs.UEB_INVALID_PAYLOAD_JSON_FORMAT, payload);
383 if (uebJsonObj.has(contentKey)) {
384 uebObjContent = uebJsonObj.getJSONObject(contentKey);
386 logger.debug(EntityEventPolicyMsgs.UEB_FAILED_TO_PARSE_PAYLOAD, contentKey);
387 logger.error(EntityEventPolicyMsgs.UEB_FAILED_TO_PARSE_PAYLOAD, contentKey);
391 return uebObjContent;
395 private SpikeEventVertex initializeSpikeEventVertex(String payload) {
397 SpikeEventVertex eventVertex = null;
398 ObjectMapper mapper = new ObjectMapper();
400 // Make sure that were were actually passed in a valid string.
401 if (payload == null || payload.isEmpty()) {
402 logger.debug(EntityEventPolicyMsgs.UEB_FAILED_TO_PARSE_PAYLOAD, EVENT_VERTEX);
403 logger.error(EntityEventPolicyMsgs.UEB_FAILED_TO_PARSE_PAYLOAD, EVENT_VERTEX);
408 // Marshal the supplied string into a UebEventHeader object.
410 eventVertex = mapper.readValue(payload, SpikeEventVertex.class);
411 } catch (JsonProcessingException e) {
412 logger.error(EntityEventPolicyMsgs.UEB_FAILED_UEBEVENTHEADER_CONVERSION, e.toString());
413 } catch (Exception e) {
414 logger.error(EntityEventPolicyMsgs.UEB_FAILED_UEBEVENTHEADER_CONVERSION, e.toString());
417 if (eventVertex != null) {
418 logger.debug(EntityEventPolicyMsgs.UEB_EVENT_HEADER_PARSED, eventVertex.toString());
426 private String getEntityPrimaryKeyFieldName(DynamicJAXBContext oxmJaxbContext, String payload,
427 String oxmEntityType, String entityType) {
429 DynamicType entity = oxmJaxbContext.getDynamicType(oxmEntityType);
430 if (entity == null) {
434 List<DatabaseField> list = entity.getDescriptor().getPrimaryKeyFields();
435 if (list != null && !list.isEmpty()) {
436 String keyName = list.get(0).getName();
437 return keyName.substring(0, keyName.indexOf('/'));
443 private String lookupValueUsingKey(String payload, String key) {
444 JsonNode jsonNode = convertToJsonNode(payload);
445 return RouterServiceUtil.recursivelyLookupJsonPayload(jsonNode, key);
449 private JsonNode convertToJsonNode(String payload) {
451 ObjectMapper mapper = new ObjectMapper();
452 JsonNode jsonNode = null;
454 jsonNode = mapper.readTree(mapper.getJsonFactory().createJsonParser(payload));
455 } catch (IOException e) {
456 logger.debug(EntityEventPolicyMsgs.FAILED_TO_PARSE_UEB_PAYLOAD, EVENT_VERTEX + " missing",
458 logger.error(EntityEventPolicyMsgs.FAILED_TO_PARSE_UEB_PAYLOAD, EVENT_VERTEX + " missing",
466 private boolean getSearchTags(SpikeEventEntity spikeEventEntity, List<String> searchableAttr,
467 String payload, String action) {
469 boolean hasSearchableAttr = false;
470 for (String searchTagField : searchableAttr) {
471 String searchTagValue;
472 if (searchTagField.equalsIgnoreCase(spikeEventEntity.getEntityPrimaryKeyName())) {
473 searchTagValue = spikeEventEntity.getEntityPrimaryKeyValue();
475 searchTagValue = this.lookupValueUsingKey(payload, searchTagField);
478 if (searchTagValue != null && !searchTagValue.isEmpty()) {
479 hasSearchableAttr = true;
480 spikeEventEntity.addSearchTagWithKey(searchTagValue, searchTagField);
483 return hasSearchableAttr;
487 * Check if OXM version is available. If available, load it.
489 private DynamicJAXBContext loadOxmContext(String version) {
490 if (version == null) {
491 logger.error(EntityEventPolicyMsgs.FAILED_TO_FIND_OXM_VERSION, version);
495 return oxmVersionContextMap.get(version);
498 private List<String> getOxmAttributes(DynamicJAXBContext oxmJaxbContext, String oxmEntityType,
499 String entityType, String fieldName) {
501 DynamicType entity = (DynamicType) oxmJaxbContext.getDynamicType(oxmEntityType);
502 if (entity == null) {
507 * Check for searchable XML tag
509 List<String> fieldValues = null;
510 Map<String, String> properties = entity.getDescriptor().getProperties();
511 for (Map.Entry<String, String> entry : properties.entrySet()) {
512 if (entry.getKey().equalsIgnoreCase(fieldName)) {
513 fieldValues = Arrays.asList(entry.getValue().split(","));
523 protected SpikeEventEntity getPopulatedEntity(JsonNode entityNode,
524 OxmEntityDescriptor resultDescriptor) {
525 SpikeEventEntity d = new SpikeEventEntity();
527 d.setEntityType(resultDescriptor.getEntityName());
529 List<String> primaryKeyValues = new ArrayList<>();
530 List<String> primaryKeyNames = new ArrayList<>();
533 for (String keyName : resultDescriptor.getPrimaryKeyAttributeName()) {
534 pkeyValue = RouterServiceUtil.getNodeFieldAsText(entityNode, keyName);
535 if (pkeyValue != null) {
536 primaryKeyValues.add(pkeyValue);
537 primaryKeyNames.add(keyName);
539 logger.error(EntityEventPolicyMsgs.PRIMARY_KEY_NULL_FOR_ENTITY_TYPE,
540 resultDescriptor.getEntityName());
544 final String primaryCompositeKeyValue = RouterServiceUtil.concatArray(primaryKeyValues, "/");
545 d.setEntityPrimaryKeyValue(primaryCompositeKeyValue);
546 final String primaryCompositeKeyName = RouterServiceUtil.concatArray(primaryKeyNames, "/");
547 d.setEntityPrimaryKeyName(primaryCompositeKeyName);
549 final List<String> searchTagFields = resultDescriptor.getSearchableAttributes();
552 * Based on configuration, use the configured field names for this entity-Type to build a
553 * multi-value collection of search tags for elastic search entity search criteria.
557 for (String searchTagField : searchTagFields) {
558 String searchTagValue = RouterServiceUtil.getNodeFieldAsText(entityNode, searchTagField);
559 if (searchTagValue != null && !searchTagValue.isEmpty()) {
560 d.addSearchTagWithKey(searchTagValue, searchTagField);
569 * Perform create, read, update or delete (CRUD) operation on search engine's suggestive search
572 * @param eventEntity Entity/data to use in operation
573 * @param action The operation to perform
574 * @param target Resource to perform the operation on
575 * @param allowDeleteEvent Allow delete operation to be performed on resource
577 protected void handleSearchServiceOperation(DocumentStoreDataEntity eventEntity, String action,
581 Map<String, List<String>> headers = new HashMap<>();
582 headers.put(Headers.FROM_APP_ID, Arrays.asList("DataLayer"));
583 headers.put(Headers.TRANSACTION_ID, Arrays.asList(MDC.get(MdcContext.MDC_REQUEST_ID)));
585 String entityId = eventEntity.getId();
587 if ((action.equalsIgnoreCase(ACTION_CREATE) && entityId != null)
588 || action.equalsIgnoreCase(ACTION_UPDATE)) {
590 // Run the GET to retrieve the ETAG from the search service
591 OperationResult storedEntity = searchAgent.getDocument(index, entityId);
593 if (HttpUtil.isHttpResponseClassSuccess(storedEntity.getResultCode())) {
594 List<String> etag = storedEntity.getHeaders().get(Headers.ETAG);
596 if (etag != null && !etag.isEmpty()) {
597 headers.put(Headers.IF_MATCH, etag);
599 logger.error(EntityEventPolicyMsgs.NO_ETAG_AVAILABLE_FAILURE, index, entityId);
603 // Write the entity to the search service.
605 searchAgent.putDocument(index, entityId, eventEntity.getAsJson(), headers);
606 } else if (action.equalsIgnoreCase(ACTION_CREATE)) {
607 // Write the entry to the search service.
608 searchAgent.postDocument(index, eventEntity.getAsJson(), headers);
610 } else if (action.equalsIgnoreCase(ACTION_DELETE)) {
611 // Run the GET to retrieve the ETAG from the search service
612 OperationResult storedEntity = searchAgent.getDocument(index, entityId);
614 if (HttpUtil.isHttpResponseClassSuccess(storedEntity.getResultCode())) {
615 List<String> etag = storedEntity.getHeaders().get(Headers.ETAG);
617 if (etag != null && !etag.isEmpty()) {
618 headers.put(Headers.IF_MATCH, etag);
620 logger.error(EntityEventPolicyMsgs.NO_ETAG_AVAILABLE_FAILURE, index, entityId);
623 searchAgent.deleteDocument(index, eventEntity.getId(), headers);
625 logger.error(EntityEventPolicyMsgs.NO_ETAG_AVAILABLE_FAILURE, index, entityId);
628 logger.error(EntityEventPolicyMsgs.ENTITY_OPERATION_NOT_SUPPORTED, action);
630 } catch (IOException e) {
631 logger.error(EntityEventPolicyMsgs.FAILED_TO_UPDATE_ENTITY_IN_DOCSTORE, eventEntity.getId(),
638 // put this here until we find a better spot
640 * Helper utility to concatenate substrings of a URI together to form a proper URI.
642 * @param suburis the list of substrings to concatenate together
643 * @return the concatenated list of substrings
645 public static String concatSubUri(String... suburis) {
646 String finalUri = "";
648 for (String suburi : suburis) {
650 if (suburi != null) {
651 // Remove any leading / since we only want to append /
652 suburi = suburi.replaceFirst("^/*", "");
654 // Add a trailing / if one isn't already there
655 finalUri += suburi.endsWith("/") ? suburi : suburi + "/";