持久层动态创建、启动、停止和使用多个数据源的方法

本文介绍bbossgroups 持久层框架动态创建、启动、停止和使用多个数据源的方法，直接看代码，欢迎大家一起讨论，有疑问可相互交流。
//启动一个连接池数据源
DBUtil.startPool(dbname, dbdriver, dburl, dbuser, dbpassword,
validationQuery);
//启动一个非连接池数据源
DBUtil.startNoPool(dbname, dbdriver, dburl, dbuser, dbpassword,
validationQuery);

停止数据源：
DBUtil.stopPool(dbname);//停止指定数据源名称
DBUtil.stopPool();//停止默认数据源（poolman.xml中的排在第一个位置的数据源）

@Test
    public void stopPool()
    {
        try {
			DBUtil.stopPool(null);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    @Test
    public void startPool()
    {
        try {
        	DBUtil.getJDBCPoolMetaData(null);
			DBUtil.startPool(null);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    
    @Test
    public void testExternalMeta()
    {
        try {
        	DBUtil.startPool(null);
        	JDBCPoolMetaData meta = DBUtil.getJDBCPoolMetaData("mq");
        	JDBCPool pool = DBUtil.getPool("mq");
        	PoolmanStatic sss = new PoolmanStatic();
        	TransferObjectFactory.createTransferObject(meta, sss);
        	System.out.println(pool.getStartTime());
        	System.out.println(pool.getStopTime());
        	System.out.println(pool.getStatus());
        	sss.isExternal();
        	DBUtil.stopPool("bspf");
        	System.out.println(pool.getStartTime());
        	System.out.println(pool.getStopTime());
        	System.out.println(pool.getStatus());
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    
    @Test
    public void testMeta()
    {
        try {
        	DBUtil.startPool(null);
        	JDBCPoolMetaData meta = DBUtil.getJDBCPoolMetaData("bspf");
        	JDBCPool pool = DBUtil.getPool("bspf");
        	PoolmanStatic sss = new PoolmanStatic();
        	TransferObjectFactory.createTransferObject(meta, sss);
        	System.out.println(pool.getStartTime());
        	System.out.println(pool.getStopTime());
        	System.out.println(pool.getStatus());
        	sss.isExternal();
        	DBUtil.stopPool("bspf");
        	PreparedDBUtil db = new PreparedDBUtil();
    		db.preparedSelect("Select 1 from dual");
    		db.executePrepared();
        	System.out.println(pool.getStartTime());
        	System.out.println(pool.getStopTime());
        	System.out.println(pool.getStatus());
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    
     
    
    @Test
    public void startstopExterPool()
    {
        try {
        	
//			DBUtil.stopPool("mq");
			System.out.println("DBUtil.statusCheck(\"mq\"):"+DBUtil.statusCheck("mq"));
			System.out.println("DBUtil.statusCheck(\"bspf\"):"+DBUtil.statusCheck("bspf"));
			System.out.println("DBUtil.statusCheck(\"kettle\"):"+DBUtil.statusCheck("kettle"));
			DBUtil dbutil= new DBUtil();
			try {
				
				dbutil.executeSelect("mq", "Select 1 from dual");
				System.out.println("dbutil.size():" + dbutil.size());
			} catch (Exception e) {
				e.printStackTrace();
			}
			
			DBUtil.startPool("mq");
			dbutil = new DBUtil();
			dbutil.executeSelect("mq","Select 1 from dual");
    		System.out.println("dbutil.size():" + dbutil.size());
			System.out.println("DBUtil.statusCheck(\"mq\"):"+DBUtil.statusCheck("mq"));
			System.out.println("DBUtil.statusCheck(\"bspf\"):"+DBUtil.statusCheck("bspf"));
			System.out.println("DBUtil.statusCheck(\"kettle\"):"+DBUtil.statusCheck("kettle"));
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    @Test
	public void testStartPool()
	{
    	TransactionManager tm = new TransactionManager();
    	try
    	{
    		DBUtil dbutil = new DBUtil();
    		String name = "db", driver="oracle.jdbc.driver.OracleDriver", jdbcurl="jdbc:oracle:thin:@//172.16.25.219:1521/orcl", username="baseline", password="baseline", readOnly="true", validationQuery="select 1 from dual";
    		DBUtil.startPool("db", driver, jdbcurl, username, password, readOnly, validationQuery);
    		tm.begin();
    		
    		dbutil.executeSelect("db","Select 1 from dual");
    		tm.commit();
    		System.out.println("dbutil.size():" + dbutil.size());
    		DBUtil.stopPool("db");
    		PreparedDBUtil db = new PreparedDBUtil();
    		db.preparedSelect("db","Select 1 from dual");
    		db.executePrepared();
    		
//    		dbutil.executeSelect("db","Select 1 from dual");
    		
    	}
    	catch(Exception e)
    	{
    		e.printStackTrace();
    	}
	}
    @Test
    public void testDBStatusStatic() throws SQLException
    {
    	int numactive = DBUtil.getNumActive("mysql");
    	int numIdle = DBUtil.getNumIdle("mysql");
    	DBUtil.getConection("mysql");
    	List<PoolableConnection> objects = (List<PoolableConnection>)DBUtil.getTraceObjects("mysql");
    	for(int i = 0;  objects != null && i < objects.size(); i ++)
    	{
    		PoolableConnection con = objects.get(i);
    		System.out.println(con.getAutoCommit());
    		System.out.println(con.toString());
    	}
    	System.out.println();
//    	int numactive = DBUtil.getNumActive("bspf");
    	
    }
    @Test
    public void testStartPoolFromConf()
    {
    	String configfile = "custom_poolman.xml";
    	SQLUtil.startPoolFromConf(configfile);
    	DBUtil dbutil = new DBUtil();
    	try {
			dbutil.executeSelect("bspf_custom_1","Select * from tableinfo");
			System.out.println("bspf_custom_1:"+dbutil.size());
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			dbutil.executeSelect("bspf_custom","Select * from tableinfo");
			System.out.println("bspf_custom:"+dbutil.size());
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    @Test
    public void startPoolFromConf()
	{
    	String configfile = "custom_poolman.xml";
    	String dbnamespace = "test";
    	SQLUtil.startPoolFromConf(configfile,dbnamespace);
    	DBUtil dbutil = new DBUtil();
    	try {
			dbutil.executeSelect("test:bspf_custom_1","Select * from tableinfo");
			System.out.println("test:bspf_custom_1:"+dbutil.size());
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			dbutil.executeSelect("test:bspf_custom","Select * from tableinfo");
			System.out.println("test:bspf_custom:"+dbutil.size());
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			dbutil.stopPool("test:bspf_custom_1");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		try {
			dbutil.stopPool("test:bspf_custom");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
    @Test
	public void startPoolFromConfWithAllParams()
	{
    	String configfile = "custom_poolman.xml";
    	String dbnamespace = "test";
    	String[] dbnames = new String[]{"bspf_custom_1"};
    	SQLUtil.startPoolFromConf(configfile,dbnamespace,dbnames);
    	DBUtil dbutil = new DBUtil();
    	try {
			dbutil.executeSelect("test:bspf_custom_1","Select * from tableinfo");
			System.out.println("test:bspf_custom_1:"+dbutil.size());
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			dbutil.executeSelect("test:bspf_custom","Select * from tableinfo");
			System.out.println("test:bspf_custom:"+dbutil.size());
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	@Test
	public void startPoolFromConfNulldbnamespace() {
		String configfile = "custom_poolman.xml";
    	String dbnamespace = null;
    	String[] dbnames = new String[]{"bspf_custom_1"};
    	SQLUtil.startPoolFromConf(configfile,dbnamespace,dbnames);
    	DBUtil dbutil = new DBUtil();
    	try {
			dbutil.executeSelect("bspf_custom_1","Select * from tableinfo");
			System.out.println("bspf_custom_1:"+dbutil.size());
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			dbutil.executeSelect("bspf_custom","Select * from tableinfo");
			System.out.println("bspf_custom:"+dbutil.size());
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	@Test
	public void testStartPoolFromTempate() throws SQLException
	{
		DBUtil.getConection();
		String poolname = "bspf-custom";
		String driver = "org.apache.derby.jdbc.EmbeddedDriver";
		String jdbcurl = "jdbc:derby:D:/workspace/bbossgroups-3.1/bboss-mvc/database/cimdb";
		String username = ""; 
		String password = "";
		String readOnly = "false";
		String txIsolationLevel = "READ_COMMITTED";
		String validationQuery = "select 1 from dual";
		String jndiName = "jdbc/derby-ds-custom";
		int initialConnections = 2;
		int minimumSize = 0;
		int maximumSize = 10;
		boolean usepool = true;
		boolean  external = true;
		String externaljndiName = "jdbc/derby-ds";        
		boolean showsql = true;		
		SQLUtil.startPool( poolname, driver, jdbcurl, username, password,
        		 readOnly,
        		 txIsolationLevel,
        		 validationQuery,
        		 jndiName,   
        		 initialConnections,
        		 minimumSize,
        		 maximumSize,
        		 usepool,
        		  external,
        		 externaljndiName        , showsql		
        		);
	}

通过以下一组接口你可以非常方便地动态创建和管理连接池，包括启动，停止，状态检测，可以根据需要调用相应的启动和创建方法，呵呵

DBUtil.stopPool   
DBUtil.startPool   
DBUtil.statusCheck   
DBUtil.startPool("db", driver, jdbcurl, username, password, readOnly, validationQuery);      
SQLUtil.startPoolFromConf(configfile);      
SQLUtil.startPoolFromConf(configfile,dbnamespace);      
SQLUtil.startPoolFromConf(configfile,dbnamespace,dbnames);     
SQLUtil.startPool( poolname, driver, jdbcurl, username, password,      
                 readOnly,      
                 txIsolationLevel,      
                 validationQuery,      
                 jndiName,         
                 initialConnections,      
                 minimumSize,      
                 maximumSize,      
                 usepool,      
                  external,      
                 externaljndiName        , showsql            
                );    

补充说明，bboss数据库类型名称和适配器映射关系：
        adapters.put("as400", DBDB2400.class);       
        adapters.put("db2app", DBDB2App.class);
        adapters.put("db2net", DBDB2Net.class);
        adapters.put("cloudscape", DBCloudscape.class);
        adapters.put("hypersonic", DBHypersonicSQL.class);
        adapters.put("interbase", DBInterbase.class);
        adapters.put("instantdb", DBInstantDB.class);
        adapters.put("mssql", DBMSSQL.class);
        adapters.put("mysql", DBMM.class);
        adapters.put("oracle", DBOracle.class);
        adapters.put("postgresql", DBPostgres.class);
        adapters.put("sapdb", DBSapDB.class);
        adapters.put("sybase", DBSybase.class);
        adapters.put("weblogic", DBWeblogic.class);
        adapters.put("axion", DBAxion.class);
        adapters.put("informix", DBInformix.class);
        adapters.put("odbc", DBOdbc.class);
        adapters.put("msaccess", DBOdbc.class);

        adapters.put("derby", DBDerby.class);

        adapters.put("", DBNone.class);