| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.apache.hadoop.yarn.server.nodemanager.webapp.dao.gpu; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.XMLReader; |
| |
| import javax.xml.bind.JAXBContext; |
| import javax.xml.bind.JAXBException; |
| import javax.xml.bind.Unmarshaller; |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.parsers.SAXParserFactory; |
| import javax.xml.transform.sax.SAXSource; |
| import java.io.StringReader; |
| |
| /** |
| * Parse XML and get GPU device information |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public class GpuDeviceInformationParser { |
| private static final Logger LOG = LoggerFactory.getLogger( |
| GpuDeviceInformationParser.class); |
| |
| private Unmarshaller unmarshaller = null; |
| private XMLReader xmlReader = null; |
| |
| private void init() |
| throws SAXException, ParserConfigurationException, JAXBException { |
| SAXParserFactory spf = SAXParserFactory.newInstance(); |
| // Disable external-dtd since by default nvidia-smi output contains |
| // <!DOCTYPE nvidia_smi_log SYSTEM "nvsmi_device_v8.dtd"> in header |
| spf.setFeature( |
| "http://apache.org/xml/features/nonvalidating/load-external-dtd", |
| false); |
| spf.setFeature("http://xml.org/sax/features/validation", false); |
| |
| JAXBContext jaxbContext = JAXBContext.newInstance( |
| GpuDeviceInformation.class); |
| |
| this.xmlReader = spf.newSAXParser().getXMLReader(); |
| this.unmarshaller = jaxbContext.createUnmarshaller(); |
| } |
| |
| public synchronized GpuDeviceInformation parseXml(String xmlContent) |
| throws YarnException { |
| if (unmarshaller == null) { |
| try { |
| init(); |
| } catch (SAXException | ParserConfigurationException | JAXBException e) { |
| LOG.error("Exception while initialize parser", e); |
| throw new YarnException(e); |
| } |
| } |
| |
| InputSource inputSource = new InputSource(new StringReader(xmlContent)); |
| SAXSource source = new SAXSource(xmlReader, inputSource); |
| try { |
| return (GpuDeviceInformation) unmarshaller.unmarshal(source); |
| } catch (JAXBException e) { |
| LOG.error("Exception while parsing xml", e); |
| throw new YarnException(e); |
| } |
| } |
| } |