XMLOperationSchedulingFramework.java

package com.cattles.util;


import org.apache.log4j.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.FileNotFoundException;
import java.io.IOException;


/**
 * Created with IntelliJ IDEA.
 * User: youfuli
 * read the platform_conf.xml
 */
public class XMLOperationSchedulingFramework {
    private static Logger logger = Logger.getLogger(XMLOperationSchedulingFramework.class);
    public Document xmlDocument;
    private static XMLOperationSchedulingFramework xmlOperationSchedulingFramework = null;

    private XMLOperationSchedulingFramework() {

    }

    public static synchronized XMLOperationSchedulingFramework getXmlOperationPlatform() {
        if (xmlOperationSchedulingFramework == null) {
            xmlOperationSchedulingFramework = new XMLOperationSchedulingFramework();
            xmlOperationSchedulingFramework.init();
        }
        return xmlOperationSchedulingFramework;
    }

    private void init() {
        // TODO Auto-generated method stub
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            this.xmlDocument = builder.parse(Constant.SCHEDULING_FRAMEWORK_CONF_PATH);
            xmlDocument.normalize();
            logger.info("initialize successfully!");
        } catch (FileNotFoundException e) {
            System.out.println(e.getMessage());
        } catch (ParserConfigurationException e) {
            System.out.println(e.getMessage());
        } catch (SAXException e) {
            System.out.println(e.getMessage());
        } catch (IOException e) {
            System.out.println(e.getMessage());
        }
    }

    /**
     * get the platform name from the platform_conf file.
     * tagName platform_name
     *
     * @return vmInfoList
     */
    public String getFrameworkName() {
        String frameworkName = "";
        NodeList framework_nameList = xmlDocument.getElementsByTagName("framework_name");
        if (framework_nameList.getLength() >= 1) {
            frameworkName = framework_nameList.item(0).getTextContent();
        }
        return frameworkName;
    }

    public static void main(String[] args) {
        XMLOperationSchedulingFramework xmlOperationSchedulingFramework = XMLOperationSchedulingFramework.getXmlOperationPlatform();
        System.out.println(xmlOperationSchedulingFramework.getFrameworkName());
    }
}