| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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. |
| */ |
| |
| package org.onosproject.provider.netconf.alarm; |
| |
| import com.google.common.collect.ImmutableSet; |
| import org.onosproject.incubator.net.faultmanagement.alarm.Alarm; |
| import org.onosproject.incubator.net.faultmanagement.alarm.AlarmId; |
| import org.onosproject.incubator.net.faultmanagement.alarm.AlarmTranslator; |
| import org.onosproject.incubator.net.faultmanagement.alarm.DefaultAlarm; |
| import org.onosproject.net.DeviceId; |
| import org.slf4j.Logger; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Node; |
| import org.xml.sax.InputSource; |
| |
| import javax.xml.parsers.DocumentBuilder; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.transform.OutputKeys; |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.dom.DOMSource; |
| import javax.xml.transform.stream.StreamResult; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.StringWriter; |
| import java.time.Instant; |
| import java.time.format.DateTimeFormatter; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| import org.xml.sax.SAXException; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Translates NETCONF notification messages to actions on alarms. |
| */ |
| public class NetconfAlarmTranslator implements AlarmTranslator { |
| |
| private final Logger log = getLogger(getClass()); |
| private static final String EVENTTIME_TAGNAME = "eventTime"; |
| |
| @Override |
| public Collection<Alarm> translateToAlarm(DeviceId deviceId, InputStream message) { |
| try { |
| Collection<Alarm> alarms = new ArrayList<>(); |
| Document doc = createDocFromMessage(message); |
| |
| // parse date element value into long |
| Node eventTime = doc.getElementsByTagName(EVENTTIME_TAGNAME).item(0); |
| String date = eventTime.getTextContent(); |
| long timeStamp = parseDate(date); |
| |
| // event-specific tag names as alarm descriptions |
| Node descriptionNode = eventTime.getNextSibling(); |
| while (descriptionNode != null) { |
| if (descriptionNode.getNodeType() == Node.ELEMENT_NODE) { |
| String description = nodeToString(descriptionNode); |
| alarms.add(new DefaultAlarm.Builder(AlarmId.alarmId(deviceId, Long.toString(timeStamp)), |
| deviceId, description, |
| Alarm.SeverityLevel.WARNING, |
| timeStamp).build()); |
| descriptionNode = null; |
| } else { |
| descriptionNode = descriptionNode.getNextSibling(); |
| } |
| } |
| return alarms; |
| } catch (SAXException | IOException | ParserConfigurationException | |
| UnsupportedOperationException | IllegalArgumentException | |
| TransformerException e) { |
| log.error("Exception thrown translating message from {}.", deviceId, e); |
| return ImmutableSet.of(); |
| } |
| } |
| |
| private Document createDocFromMessage(InputStream message) |
| throws SAXException, IOException, ParserConfigurationException { |
| DocumentBuilderFactory dbfactory = DocumentBuilderFactory.newInstance(); |
| DocumentBuilder builder = dbfactory.newDocumentBuilder(); |
| return builder.parse(new InputSource(message)); |
| } |
| |
| private long parseDate(String timeStr) |
| throws UnsupportedOperationException, IllegalArgumentException { |
| return DateTimeFormatter.ISO_DATE_TIME.parse(timeStr, Instant::from).getEpochSecond(); |
| } |
| |
| private static String nodeToString(Node rootNode) throws TransformerException { |
| TransformerFactory tf = TransformerFactory.newInstance(); |
| Transformer transformer = tf.newTransformer(); |
| transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); |
| StringWriter writer = new StringWriter(); |
| DOMSource source = new DOMSource(rootNode); |
| transformer.transform(source, new StreamResult(writer)); |
| return writer.getBuffer().toString(); |
| } |
| } |