1 files changed, 277 insertions, 0 deletions
diff --git a/src/main/java/org/onap/aai/datarouter/query/ChameleonRouter.java b/src/main/java/org/onap/aai/datarouter/query/ChameleonRouter.java
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+++ b/src/main/java/org/onap/aai/datarouter/query/ChameleonRouter.java
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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017 Amdocs
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package  org.onap.aai.datarouter.query;
+
+import java.security.InvalidParameterException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.ws.rs.BadRequestException;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.RuntimeCamelException;
+import org.onap.aai.rest.RestClientEndpoint;
+import org.onap.aai.cl.api.Logger;
+import org.onap.aai.cl.eelf.LoggerFactory;
+
+public class ChameleonRouter extends QueryRouter {
+
+  Logger logger = LoggerFactory.getInstance().getLogger(ChameleonRouter.class.getName());
+
+  private String chameleonBaseURL;
+
+  private enum ChameleonAction {
+    GET_OBJECT_BY_ID, GET_REL_BY_ID, GET_OBJECT_RELS, GET_OBJECTS_BY_FILTER, GET_RELS_BY_FILTER
+  };
+
+  private static final Pattern QUERY_OBJECT_FILTER_URL_MATCH = Pattern.compile("/objects/filter(.*)");
+  private static final Pattern QUERY_REL_FILTER_URL_MATCH = Pattern.compile("/relationships/filter(.*)");
+  private static final Pattern QUERY_OBJECT_REL_URL_MATCH = Pattern.compile("/objects/relationships/(.*)");
+  private static final Pattern QUERY_OBJECT_ID_URL_MATCH = Pattern.compile("/objects/(.*)");
+  private static final Pattern QUERY_REL_ID_URL_MATCH = Pattern.compile("/relationships/(.*)");
+
+  private static final String ECOMP_QUERY_ID = "ECOMP_QUERY_ID";
+  private static final String ECOMP_QUERY_TYPE = "ECOMP_QUERY_TYPE";
+
+  public ChameleonRouter(String chameleonBaseURL) {
+    String baseURL = chameleonBaseURL.endsWith("/") ? chameleonBaseURL.substring(0, chameleonBaseURL.length() - 1)
+        : chameleonBaseURL;
+    if (checkRecursion(baseURL)) {
+      logger.error(QueryMsgs.QUERY_ERROR,
+          "Invalid chameleonBaseURL : Can't re-route back to DataRouter " + chameleonBaseURL);
+      throw new InvalidParameterException(
+          "Invalid chameleonBaseURL : Can't re-route back to DataRouter " + chameleonBaseURL);
+    }
+    this.chameleonBaseURL = baseURL;
+  }
+
+  public void setQueryRequest(Exchange exchange) {
+    setMDC(exchange);
+    ChameleonAction action = resolveChameleonAction(exchange);
+    String ecompUrl = buildUrl(exchange, action);
+    logger.info(QueryMsgs.QUERY_INFO, "Routing request to Chameleon service URL: " + ecompUrl);
+    exchange.getIn().setHeader(RestClientEndpoint.IN_HEADER_URL, ecompUrl);
+    exchange.getIn().setHeader("X-FromAppId", SERVICE_NAME);
+    exchange.getIn().setHeader("X-TransactionId", getTxId(exchange));
+
+  }
+
+  private boolean urlMatcher(Pattern p, String url) {
+    Matcher m = p.matcher(url);
+    if (m.matches() && !m.group(1).contains("/")) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  private ChameleonAction resolveChameleonAction(Exchange exchange) {
+    String path = exchange.getIn().getHeader(Exchange.HTTP_PATH, String.class);
+    path = path.endsWith("/") ? path.substring(0, path.length() - 1) : path;
+    ChameleonAction action;
+
+    if (urlMatcher(QUERY_OBJECT_FILTER_URL_MATCH, path)) {
+      action = ChameleonAction.GET_OBJECTS_BY_FILTER;
+    } else if (urlMatcher(QUERY_REL_FILTER_URL_MATCH, path)) {
+      action = ChameleonAction.GET_RELS_BY_FILTER;
+    } else if (urlMatcher(QUERY_OBJECT_REL_URL_MATCH, path)) {
+      action = ChameleonAction.GET_OBJECT_RELS;
+    } else if (urlMatcher(QUERY_OBJECT_ID_URL_MATCH, path)) {
+      action = ChameleonAction.GET_OBJECT_BY_ID;
+    } else if (urlMatcher(QUERY_REL_ID_URL_MATCH, path)) {
+      action = ChameleonAction.GET_REL_BY_ID;
+    } else {
+      exchange.getIn().setHeader(ChameleonErrorProcessor.ECOMP_QUERY_ERROR_CODE, 404);
+      throw new RuntimeCamelException();
+    }
+    return action;
+  }
+
+  private String buildUrl(Exchange exchange, ChameleonAction action) {
+    String path = exchange.getIn().getHeader(Exchange.HTTP_PATH, String.class);
+    path = path.endsWith("/") ? path.substring(0, path.length() - 1) : path;
+    String queryParams = exchange.getIn().getHeader(Exchange.HTTP_QUERY, String.class);
+    String ecompUrl = "";
+    String ID = "";
+
+    switch (action) {
+    case GET_OBJECT_BY_ID:
+      ID = path.substring(path.lastIndexOf("/") + 1, path.length());
+      if (ID == null || ID.isEmpty()) {
+        throw new IllegalArgumentException("Invalid URI path with no Object ID: " + path);
+      } else {
+        if (queryParams != null && !queryParams.isEmpty()) {
+          ecompUrl = chameleonBaseURL + "/" + ID + "?" + queryParams;
+
+        } else {
+          ecompUrl = chameleonBaseURL + "/" + ID;
+        }
+      }
+      exchange.getIn().setHeader(ECOMP_QUERY_ID, ID);
+      exchange.getIn().setHeader(ECOMP_QUERY_TYPE, ChameleonAction.GET_OBJECT_BY_ID);
+      break;
+
+    case GET_REL_BY_ID:
+      ID = path.substring(path.lastIndexOf("/") + 1, path.length());
+      if (ID == null || ID.isEmpty()) {
+        throw new IllegalArgumentException("Invalid URI path with no Relationship ID: " + path);
+      } else {
+        if (queryParams != null && !queryParams.isEmpty()) {
+          ecompUrl = chameleonBaseURL + "/" + ID + "?" + queryParams;
+
+        } else {
+          ecompUrl = chameleonBaseURL + "/" + ID;
+        }
+      }
+      exchange.getIn().setHeader(ECOMP_QUERY_ID, ID);
+      exchange.getIn().setHeader(ECOMP_QUERY_TYPE, ChameleonAction.GET_REL_BY_ID);
+      break;
+
+    case GET_OBJECT_RELS:
+      ID = path.substring(path.lastIndexOf("/") + 1, path.length());
+      if (ID == null || ID.isEmpty()) {
+        throw new IllegalArgumentException("Invalid URI path with no Object ID: " + path);
+      } else {
+        if (queryParams != null && !queryParams.isEmpty()) {
+          // TODO: Fix the URL for getting object relations when Chameloen
+          // supports this API
+          ecompUrl = chameleonBaseURL + "/relations" + ID + "?" + queryParams;
+
+        } else {
+          ecompUrl = chameleonBaseURL + "/relations" + ID;
+        }
+      }
+      exchange.getIn().setHeader(ECOMP_QUERY_ID, ID);
+      exchange.getIn().setHeader(ECOMP_QUERY_TYPE, ChameleonAction.GET_OBJECT_RELS);
+      break;
+
+    case GET_OBJECTS_BY_FILTER:
+      if (queryParams != null && !queryParams.isEmpty()) {
+        // TODO: Fix the URL for getting object filter when Chameloen
+        // supports this API
+        ecompUrl = chameleonBaseURL + "/filter?" + queryParams;
+      } else {
+        ecompUrl = chameleonBaseURL + "/filter";
+      }
+      exchange.getIn().setHeader(ECOMP_QUERY_TYPE, ChameleonAction.GET_OBJECTS_BY_FILTER);
+      break;
+
+    case GET_RELS_BY_FILTER:
+      if (queryParams != null && !queryParams.isEmpty()) {
+        // TODO: Fix the URL for getting rel filter when Chameloen
+        // supports this API
+        ecompUrl = chameleonBaseURL + "/filter?" + queryParams;
+      } else {
+        ecompUrl = chameleonBaseURL + "/filter";
+      }
+      exchange.getIn().setHeader(ECOMP_QUERY_TYPE, ChameleonAction.GET_RELS_BY_FILTER);
+      break;
+
+    }
+
+    return ecompUrl;
+  }
+
+  public void setQueryResponse(Exchange exchange) {
+    parseResponse(exchange);
+    adjustHeaders(exchange);
+  }
+
+  private void adjustHeaders(Exchange exchange) {
+    // Remove the internal heders
+    exchange.getIn().removeHeader(ECOMP_QUERY_ID);
+    exchange.getIn().removeHeader(ECOMP_QUERY_TYPE);
+  }
+
+  private void parseResponse(Exchange exchange) throws BadRequestException {
+
+    ChameleonAction action = exchange.getIn().getHeader(ECOMP_QUERY_TYPE, ChameleonAction.class);
+    Integer httpResponseCode = exchange.getIn().getHeader(RestClientEndpoint.OUT_HEADER_RESPONSE_CODE, Integer.class);
+    String ID = "";
+
+    switch (action) {
+    case GET_OBJECT_BY_ID:
+      if (httpResponseCode >= 200 && httpResponseCode <= 299) {
+        ID = exchange.getIn().getHeader(ECOMP_QUERY_ID, String.class);
+        if (ID == null || ID.isEmpty()) {
+          exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, 400);
+        } else {
+          ChameleonResponseBuiler.buildEntity(exchange, ID);
+        }
+      } else {
+        exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, httpResponseCode);
+      }
+      break;
+    case GET_REL_BY_ID:
+      if (httpResponseCode >= 200 && httpResponseCode <= 299) {
+        ID = exchange.getIn().getHeader(ECOMP_QUERY_ID, String.class);
+        if (ID == null || ID.isEmpty()) {
+          exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, 400);
+        } else {
+          ChameleonResponseBuiler.buildEntity(exchange, ID);
+        }
+      } else {
+        exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, httpResponseCode);
+      }
+      break;
+    case GET_OBJECT_RELS:
+      if (httpResponseCode >= 200 && httpResponseCode <= 299) {
+        ID = exchange.getIn().getHeader(ECOMP_QUERY_ID, String.class);
+        if (ID == null || ID.isEmpty()) {
+          exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, 400);
+        } else {
+          ChameleonResponseBuiler.buildObjectRelationship(exchange, ID);
+        }
+      } else {
+        // TODO:Return 200 with empty body for now until chameleon supports this
+        // query
+        exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, 200);
+        exchange.getIn().setBody("[]");
+      }
+      break;
+    case GET_OBJECTS_BY_FILTER:
+      if (httpResponseCode >= 200 && httpResponseCode <= 299) {
+        ChameleonResponseBuiler.buildCollection(exchange);
+      } else {
+        // TODO:Return 200 with empty body for now until chameleon supports this
+        // query
+        exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, 200);
+        exchange.getIn().setBody("[]");
+      }
+      break;
+    case GET_RELS_BY_FILTER:
+      if (httpResponseCode >= 200 && httpResponseCode <= 299) {
+        ChameleonResponseBuiler.buildCollection(exchange);
+      } else {
+        // TODO:Return 200 with empty body for now until chameleon supports this
+        // query
+        exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, 200);
+        exchange.getIn().setBody("[]");
+      }
+      break;
+
+    }
+
+  }
+
+}