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/*-
* ============LICENSE_START=======================================================
* openECOMP : SDN-C
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights
* reserved.
* ================================================================================
* 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.ccsdk.sli.northbound.dmaapclient;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.time.Instant;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SdncAaiDmaapConsumer extends SdncDmaapConsumer {
private static final Logger LOG = LoggerFactory.getLogger(SdncAaiDmaapConsumer.class);
private static final String SDNC_ENDPOINT = "SDNC.endpoint";
private static final String TEMPLATE = "SDNC.template";
private static final String DMAAPLISTENERROOT = "DMAAPLISTENERROOT";
private static final String AAI_EVENT = "AAI-EVENT";
private static final String EVENT_TYPE = "event-type";
private static final String ENTITY_TYPE = "entity-type";
private static final String EVENT_HEADER = "event-header";
private String rootDir;
protected VelocityEngine velocityEngine;
public SdncAaiDmaapConsumer() {
velocityEngine = new VelocityEngine();
Properties props = new Properties();
rootDir = System.getenv(DMAAPLISTENERROOT);
if ((rootDir == null) || (rootDir.length() == 0)) {
rootDir = "/opt/app/dmaap-listener/lib/";
}
else {
rootDir = rootDir + "/lib/";
}
props.put("file.resource.loader.path", rootDir);
velocityEngine.init(props);
}
/*
* for testing purposes
*/
SdncAaiDmaapConsumer(Properties props) {
velocityEngine = new VelocityEngine();
velocityEngine.init(props);
}
protected String publish(String templatePath, String jsonString) throws IOException
{
JSONObject jsonObj = new JSONObject(jsonString);
VelocityContext context = new VelocityContext();
for(Object key : jsonObj.keySet())
{
context.put((String)key, jsonObj.get((String)key));
}
String id = jsonObj.getJSONObject(EVENT_HEADER).get("id").toString();
context.put("req_id", id);
context.put("curr_time", Instant.now());
ObjectMapper oMapper = new ObjectMapper();
String rpcMsgbody = oMapper.writeValueAsString(jsonString);
context.put("full_message", rpcMsgbody);
Writer writer = new StringWriter();
velocityEngine.mergeTemplate(templatePath, "UTF-8", context, writer);
writer.flush();
return writer.toString();
}
@Override
public void processMsg(String msg) throws InvalidMessageException {
if (msg == null) {
throw new InvalidMessageException("Null message");
}
ObjectMapper oMapper = new ObjectMapper();
JsonNode aaiRootNode;
try {
aaiRootNode = oMapper.readTree(msg);
} catch (Exception e) {
throw new InvalidMessageException("Cannot parse json object", e);
}
JsonNode eventHeaderNode = aaiRootNode.get(EVENT_HEADER);
if(eventHeaderNode == null) {
LOG.info("Missing Event Header node.");
return;
}
JsonNode eventTypeNode = eventHeaderNode.get(EVENT_TYPE);
String eventType = eventTypeNode.textValue();
if(AAI_EVENT.equals(eventType) == false) {
LOG.info("Unknown Event Type {}", eventType);
return;
}
JsonNode entityTypeNode = eventHeaderNode.get(ENTITY_TYPE);
String entityType = entityTypeNode.textValue();
String mapFilename = rootDir + entityType + ".map";
Map<String, String> fieldMap = loadMap(mapFilename);
if (fieldMap == null) {
throw new InvalidMessageException("Unable to process message - cannot load mapping file");
}
if (!fieldMap.containsKey(SDNC_ENDPOINT)) {
throw new InvalidMessageException("No SDNC endpoint known for message " + entityType);
}
String sdncEndpoint = fieldMap.get(SDNC_ENDPOINT);
if (!fieldMap.containsKey(TEMPLATE)) {
throw new InvalidMessageException("No SDNC template known for message " + entityType);
}
String templateName = fieldMap.get(TEMPLATE);
try {
String rpcMsgbody = publish(templateName, msg);
String odlUrlBase = getProperty("sdnc.odl.url-base");
String odlUser = getProperty("sdnc.odl.user");
String odlPassword = getProperty("sdnc.odl.password");
if ((odlUrlBase != null) && (odlUrlBase.length() > 0)) {
SdncOdlConnection conn = SdncOdlConnection.newInstance(odlUrlBase + "/" + sdncEndpoint, odlUser, odlPassword);
conn.send("POST", "application/json", rpcMsgbody);
} else {
LOG.info("POST message body would be:\n" + rpcMsgbody);
}
} catch (Exception e) {
LOG.error("Unable to process message", e);
}
}
private Map<String, String> loadMap(String mapFilename) {
File mapFile = new File(mapFilename);
if (!mapFile.canRead()) {
LOG.error(String.format("Cannot read map file (%s)", mapFilename));
return null;
}
Map<String, String> results = new HashMap<>();
try (BufferedReader mapReader = new BufferedReader(new FileReader(mapFile))) {
String curLine;
while ((curLine = mapReader.readLine()) != null) {
curLine = curLine.trim();
if ((curLine.length() > 0) && (!curLine.startsWith("#")) && curLine.contains("=>")) {
String[] entry = curLine.split("=>");
if (entry.length == 2) {
results.put(entry[0].trim(), entry[1].trim());
}
}
}
mapReader.close();
} catch (Exception e) {
LOG.error("Caught exception reading map " + mapFilename, e);
return null;
}
return results;
}
}
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