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/*-
* ============LICENSE_START=======================================================
* ONAP : SDN-C
* ================================================================================
* Copyright (C) 2019-2020 Fujitsu Limited 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.sdnc.northbound.asyncrequests;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Properties;
import java.io.Writer;
import java.io.StringWriter;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.stream.Collectors;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.Template;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.json.JSONArray;
import org.json.JSONObject;
import org.osgi.service.component.annotations.Component;
@Component(immediate = true, property = {"alias=/asyncNotification", "servlet-name=AsyncNotification"})
public class AsyncNotificationHandling extends HttpServlet implements Servlet {
private static final long serialVersionUID = 1L;
private final Logger LOG = LoggerFactory.getLogger(AsyncNotificationHandling.class);
private static final String PARAMETER_NAME = "parameter-name";
private static final String STRING_VALUE = "string-value";
private static final String REQUEST_ID = "request-id";
private static final String SVC_REQUEST_ID = "svc-request-id";
private static final String RESPONSE_CODE = "response-code";
private static final String ACK_FINAL_INDICATOR = "ack-final-indicator";
private static final String CONFIGURATION_RESPONSE = "configuration-response-common";
private static final String PROPERTIES_PATH = "/opt/onap/sdnc/data/properties/";
private static final String TEMPLATE_NAME = "rpc-message-sliapi-execute-async.vt";
private static final String UTF_8 = "UTF-8";
/**
* Handles async request for different domain controllers
*/
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
LOG.info("Reached async servlet");
BufferedReader requestInput = null;
try {
requestInput = request.getReader();
} catch (Exception e) {
LOG.error("Unable to read input from request", e);
}
if (requestInput == null) {
return;
}
String json = requestInput.lines().collect(Collectors.joining());
LOG.info("Async Request payload {}", json);
if (json == null) {
return;
}
JSONObject jsonObj = new JSONObject(json);
JSONObject input = jsonObj.getJSONObject("input");
if (input.has(CONFIGURATION_RESPONSE)) {
JSONObject payloadString = null;
try {
payloadString = input.getJSONObject(CONFIGURATION_RESPONSE);
String rpcMessageBody = buildAsyncNotifRPCMsgRoadm(payloadString);
LOG.debug("rpc message body {}", rpcMessageBody);
invokeRPC(rpcMessageBody);
} catch (Exception e) {
LOG.error("Unable to build rpc message body::", e);
}
} else {
LOG.info("Async request received for wrong domain");
}
}
private void invokeRPC(String rpcMsgbody) {
try {
Properties baseProperties = new Properties();
baseProperties.load(new FileInputStream(new File("/opt/onap/sdnc/data/properties/optical-service-dg.properties")));
String odlUrlBase = baseProperties.getProperty("odlUrlBase");
String odlUser = baseProperties.getProperty("controller.user");
String odlPassword = baseProperties.getProperty("controller.pwd");
String sdncEndpoint = baseProperties.getProperty("sdncEndpoint");
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 String buildAsyncNotifRPCMsgRoadm(JSONObject payloadString) throws IOException {
VelocityEngine velocityEngine = new VelocityEngine();
Properties props = new Properties();
props.put("file.resource.loader.path", PROPERTIES_PATH);
velocityEngine.init(props);
String sliParameters = "sli_parameters";
JSONArray sliParametersArray = new JSONArray();
VelocityContext context = new VelocityContext();
context.put("rpc_name", "handle-async-notif");
String requestId = payloadString.getString(SVC_REQUEST_ID);
String responseCode = payloadString.getString(RESPONSE_CODE);
String ackIndicator = payloadString.getString(ACK_FINAL_INDICATOR);
sliParametersArray.put(new JSONObject().put(PARAMETER_NAME, REQUEST_ID).put(STRING_VALUE, requestId));
sliParametersArray.put(new JSONObject().put(PARAMETER_NAME, RESPONSE_CODE).put(STRING_VALUE, responseCode));
sliParametersArray
.put(new JSONObject().put(PARAMETER_NAME, ACK_FINAL_INDICATOR).put(STRING_VALUE, ackIndicator));
context.put(sliParameters, sliParametersArray);
Writer writer = new StringWriter();
velocityEngine.mergeTemplate(TEMPLATE_NAME, UTF_8, context, writer);
writer.flush();
return writer.toString();
}
}
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