hsqldb 源码剖析

hsqldb,一个只有700多k的小型数据库.

内嵌支持JDBC驱动与数据库引擎.

Server模式启动流程:


org.hsqldb.Server.java

public static void main(String[] paramArrayOfString)
  {
    //获取并读取 server.properties 文件,若没有取默认
    String str = FileUtil.getDefaultInstance().canonicalOrAbsolutePath("server");
    HsqlProperties localHsqlProperties1 = ServerConfiguration.getPropertiesFromFile(str);
    HsqlProperties localHsqlProperties2 = (localHsqlProperties1 == null) ? new HsqlProperties() : localHsqlProperties1;
    HsqlProperties localHsqlProperties3 = null;
    //获取main参数数组,加入 server.properties.保存到HsqlProperties对象.
    try
    {
      localHsqlProperties3 = HsqlProperties.argArrayToProps(paramArrayOfString, "server");
    }
    catch (ArrayIndexOutOfBoundsException localArrayIndexOutOfBoundsException)
    {
      printHelp("server.help");
      return;
    }
    if (localHsqlProperties3 != null)
    {
      if (localHsqlProperties3.getErrorKeys().length != 0)
      {
        printHelp("server.help");
        return;
      }
      localHsqlProperties2.addProperties(localHsqlProperties3);
    }
    
    //可略过
    ServerConfiguration.translateDefaultDatabaseProperty(localHsqlProperties2);
    ServerConfiguration.translateDefaultNoSystemExitProperty(localHsqlProperties2);
    
    //创建Server,并设置属性文件.主要分配serverid.取默认协议.
    Server localServer = new Server();
    try
    {
      localServer.setProperties(localHsqlProperties2);
    }
    catch (Exception localException)
    {
      localServer.printError("Failed to set properties");
      localServer.printStackTrace(localException);
      return;
    }
    //输出初始化信息
    localServer.print("Startup sequence initiated from main() method");
    if (localHsqlProperties1 != null)
    {
      localServer.print("Loaded properties from [" + str + ".properties]");
    }
    else
    {
      localServer.print("Could not load properties from file");
      localServer.print("Using cli/default properties only");
    }
    //启动Server.
    localServer.start();
  }

配置文件内容server.properties
server.remote_open=false
server.database.0=file:\\d:\\hsqldb\\data/dbfile
server.dbname.0=dbname
server.no_system_exit=false
server.restart_on_shutdown=false
server.address=127.0.0.1
server.port=12345
server.silent=true
server.trace=false


启动Server命令
java -cp d:\hsqldb\lib\hsqldb.jar org.hsqldb.Server

//启动服务器线程
this.serverThread = new ServerThread(this, "HSQLDB Server ");
this.serverThread.start();