package net.simple.mysql;

import java.io.File;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import com.mysql.management.MysqldResource;

/**
 * 
 * @author 李巖飛
 * @email eliyanfei@126.com 
 * 2016年11月2日 下午1:44:55
 *
 */
public final class EmbedMySqlServer {
 private MysqldResource mysqlInstance;
 //配置信息
 public final Properties props;
 //端口信息
 private String port;
 /**
 * 考慮到數(shù)據(jù)庫的性能問題,允許將數(shù)據(jù)庫放在其它磁盤
 */
 private String embedMySqlHome;

 public EmbedMySqlServer(final Properties props) {
 this.props = props;
 }

 public EmbedMySqlServer(final Properties props, String embedMySqlHome) {
 this.embedMySqlHome = embedMySqlHome;
 this.props = props;
 }

 public final String getEmbedMySqlHome() {
 return null == embedMySqlHome ? getPlatformBaseDir() : embedMySqlHome;
 }

 /**
 * 獲得當前應用主目錄
 * @return 當前應用啟動程序所在目錄.
 */
 public static String getPlatformBaseDir() {
 return System.getProperty("user.dir");
 }

 public static boolean isBlank(final String str) {
 int strLen;
 if (str == null || (strLen = str.length()) == 0) {
  return true;
 }
 for (int i = 0; i < strLen; i++) {
  if (Character.isWhitespace(str.charAt(i)) == false) {
  return false;
  }
 }
 return true;
 }

 public void startup() {
 final File baseDir = new File(getEmbedMySqlHome(), "mysql-em");
 mysqlInstance = new MysqldResource(baseDir);
 port = props.getProperty("port");
 if (isBlank(port))
  props.put("port", port = String.valueOf((int) (Math.random() * 40000)));
 final Set<Object> keys = props.keySet();
 final Map<String, String> options = new HashMap<String, String>(keys.size());
 for (final Object key : keys) {
  final String val = props.getProperty(key.toString());
  if ("".equals(val))
  options.put(key.toString(), null);
  else
  options.put(key.toString(), val.replace("{$contextPath}", getPlatformBaseDir()));
 }
 if (!mysqlInstance.isRunning())
  mysqlInstance.start("Em_MySQL", options, false, keys.contains("defaults-file"));
 }

 public String getPort() {
 return port;
 }

 /**
 * 判斷mysql是否正在運行
 */
 public boolean isRunning() {
 return null == mysqlInstance ? false : mysqlInstance.isRunning();
 }

 public void shutdown() {
 if (mysqlInstance != null)
  mysqlInstance.shutdown();
 }

 public void cleanup() {
 if (mysqlInstance != null)
  mysqlInstance.cleanup();
 }
}

public static void main(String[] args) {
 try {
  Properties pro = new Properties();
  //根據(jù)機器配置，設置不同的參數(shù)
  pro.load(MysqlTest.class.getResourceAsStream("MySql_medium.properties"));
  new EmbedMySqlServer(pro).startup();
  //可以把數(shù)據(jù)庫放到其他磁盤
  //new EmbedMySqlServer(pro,"f:\\").startup();
  Connection conn = getTestConnection();
  System.out.println(conn.isClosed());
  conn.close();
 } catch (Exception e) {
  e.printStackTrace();
 }
 }