JobDiagnoser.java
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上传日期:2018-01-08
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文件大小:3k
- /**
- * 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
- *
- * 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.apache.hadoop.vaidya;
- import org.apache.hadoop.vaidya.util.XMLUtils;
- import org.w3c.dom.Document;
- import org.w3c.dom.Element;
- import javax.xml.parsers.DocumentBuilder;
- import javax.xml.parsers.DocumentBuilderFactory;
- import javax.xml.parsers.ParserConfigurationException;
- /**
- * This is a base driver class for job diagnostics. Various specialty drivers that
- * tests specific aspects of job problems e.g. PostExPerformanceDiagnoser extends the
- * this base class.
- *
- */
- public class JobDiagnoser {
- /*
- * XML document containing report elements, one for each rule tested
- */
- private Document _report;
- /*
- * @report : returns report document
- */
- public Document getReport() {
- return this._report;
- }
-
- /**
- * Constructor. It initializes the report document.
- */
- public JobDiagnoser () throws Exception {
-
- /*
- * Initialize the report document, make it ready to add the child report elements
- */
- DocumentBuilder builder = null;
- DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
- try{
- builder = factory.newDocumentBuilder();
- this._report = builder.newDocument();
- } catch (ParserConfigurationException e) {
- e.printStackTrace();
- }
-
- // Insert Root Element
- Element root = (Element) this._report.createElement("PostExPerformanceDiagnosticReport");
- this._report.appendChild(root);
- }
-
- /*
- * Print the report document to console
- */
- public void printReport() {
- XMLUtils.printDOM(this._report);
- }
-
- /*
- * Save the report document the specified report file
- * @param reportfile : path of report file.
- */
- public void saveReport(String filename) {
- XMLUtils.writeXmlToFile(filename, this._report);
- }
- }