com.hangum.tadpole.application.start.update.checker.NewVersionChecker.java Source code

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Here is the source code for com.hangum.tadpole.application.start.update.checker.NewVersionChecker.java

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/*******************************************************************************
 * Copyright (c) 2016 hangum.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     hangum - initial API and implementation
 ******************************************************************************/
package com.hangum.tadpole.application.start.update.checker;

import java.io.InputStream;
import java.net.URL;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import com.google.gson.Gson;
import com.hangum.tadpole.commons.libs.core.define.SystemDefine;

/**
 * Update checker
 * 
 * @author hangum
 *
 */
public class NewVersionChecker {
    private static final Logger logger = Logger.getLogger(NewVersionChecker.class);
    public static final String CHECK_URI = "https://raw.githubusercontent.com/hangum/TadpoleForDBTools/gh-pages/versionInfo.json";

    private long lastCheckTimeMillis = 0l;
    private NewVersionObject newVersionObj;

    public static NewVersionChecker instance = new NewVersionChecker();

    private NewVersionChecker() {
    }

    public static synchronized NewVersionChecker getInstance() {
        return instance;
    }

    /**
     * new version checker
     * @return
     */
    public boolean check() {
        if (lastCheckTimeMillis == 0l)
            lastCheckTimeMillis = System.currentTimeMillis();

        // 60?  check  ? ?.
        long currentTimeMillis = System.currentTimeMillis();
        long diffTimeMills = (currentTimeMillis - lastCheckTimeMillis) / 1000l;

        if (logger.isDebugEnabled()) {
            logger.debug("currentTimeMillis mills " + currentTimeMillis);
            logger.debug("lastCheckTimeMillis mills " + lastCheckTimeMillis);
            logger.debug("diff mills " + diffTimeMills);
        }

        // 24?  .
        if (diffTimeMills > (60 * 60 * 24) || newVersionObj == null) {
            lastCheckTimeMillis = currentTimeMillis;
            return getVersionInfoData();
        }
        return false;
    }

    /**
     * get version info data
     * 
     * @return
     */
    public boolean getVersionInfoData() {
        InputStream is = null;
        try {
            is = new URL(CHECK_URI).openConnection().getInputStream();
            String strJson = IOUtils.toString(is);
            if (logger.isDebugEnabled()) {
                logger.debug("==[start]===================================");
                logger.debug(strJson);
                logger.debug("==[end]===================================");
            }
            Gson gson = new Gson();
            newVersionObj = gson.fromJson(strJson, NewVersionObject.class);
            if (newVersionObj == null)
                return false;

            String[] arryCurVer = StringUtils.split(SystemDefine.MAJOR_VERSION, ".");
            String[] arryNewVer = StringUtils.split(newVersionObj.getMajorVer(), ".");
            for (int i = 0; i < arryCurVer.length; i++) {
                if (Integer.parseInt(arryNewVer[i]) > Integer.parseInt(arryCurVer[i])) {
                    return true;
                }
            }

        } catch (Exception e) {
            logger.error(String.format("New version checkerer %s.", e.getMessage()));
        } finally {
            if (is != null) {
                try {
                    //               IOUtils.toString(is);
                    IOUtils.closeQuietly(is);
                } catch (Exception e) {
                    //igoner excetpion
                }
            }
        }

        return false;
    }

    public NewVersionObject getNewVersionObj() {
        return newVersionObj;
    }

}