XMLOperationPlatform.java

package com.cattles.util;


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 XMLOperationPlatform {
    public Document xmlDocument;
    private static XMLOperationPlatform xmlOperationPlatform = null;

    private XMLOperationPlatform() {

    }

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

    private void init() {
        // TODO Auto-generated method stub
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            this.xmlDocument = builder.parse(Constant.PLATFORM_CONF_PATH);
            xmlDocument.normalize();
        } 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 getPlatformName() {
        String platformName = "";
        NodeList platform_nameList = xmlDocument.getElementsByTagName("platform_name");
        if (platform_nameList.getLength() >= 1) {
            platformName = platform_nameList.item(0).getTextContent();
        }
        return platformName;
    }

    public int getPoolInitializationSize() {
        int initializationSize = 6;
        NodeList initializationSize_List = xmlDocument.getElementsByTagName("poolInitializationSize");
        if (initializationSize_List.getLength() >= 1) {
            initializationSize = Integer.parseInt(initializationSize_List.item(0).getTextContent());
        }
        return initializationSize;
    }

    public static void main(String[] args) {
        XMLOperationPlatform xmlOperationPlatform = XMLOperationPlatform.getXmlOperationPlatform();
        System.out.println(xmlOperationPlatform.getPlatformName());
        System.out.println(xmlOperationPlatform.getPoolInitializationSize());
    }
}