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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017-2018 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=========================================================
*/
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;
}
}
}
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