nsinsamejvm.java

derby database source code.good for you.

/*

   Derby - Class org.apache.derbyTesting.functionTests.tests.derbynet.NSinSameJVM

   Copyright 2003, 2004 The Apache Software Foundation or its licensors, as applicable.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */

package org.apache.derbyTesting.functionTests.tests.derbynet;

import java.sql.*;
import org.apache.derby.drda.NetworkServerControl;
import org.apache.derbyTesting.functionTests.util.TestUtil;
import java.net.InetAddress;
import java.io.PrintWriter;

public class NSinSameJVM {

    private static final int NETWORKSERVER_PORT = 20000;
	private static final String INVALID_HOSTNAME = "myhost.nowhere.ibm.com";
    private String databaseFileName = "NSinSameJVMTestDB;create=true";

    public NSinSameJVM() {

        // Load the Derby driver
        try {
			TestUtil.loadDriver();
            dbg("Derby drivers loaded");
        } catch (Exception e) {
            e.printStackTrace();
        }

		

		NetworkServerControl serverControl = null;
		boolean started = false;


		try {

			serverControl = new
				NetworkServerControl(InetAddress.getByName("0.0.0.0"),
									 NETWORKSERVER_PORT);

			serverControl.start(new PrintWriter(System.out,true));
			
			for (int i = 1; i < 50; i++)
			{
				Thread.sleep(1000);
				if (isServerStarted(serverControl))
				{
					started = true;
					break;
				}
			}
				
		} catch (Exception e)
		{
			e.printStackTrace();
		}
		if(started)
			dbg("NetworkServer started");
		else
		{
			System.out.println("FAIL Network Server did not start");
			return;
		}
		String jdbcUrlPrefix = TestUtil.getJdbcUrlPrefix("localhost", NETWORKSERVER_PORT);

        String url = jdbcUrlPrefix + databaseFileName;

        Connection connection = null;
		   
        try {
			// Just connect, do something and close the connection
            connection = DriverManager.getConnection(url, "user", "password");
			Statement stmt = connection.createStatement();
			ResultSet rs = stmt.executeQuery("Select  tablename   from  sys.systables");
			
			while (rs.next())
			{
				rs.getString(1);
			}
			rs.close();
            dbg("Connected to database " + databaseFileName);
			// Leave the connection open before shutdown to make 
			// sure the thread closes down.
			// connection.close();
			
			System.out.println("getting ready to shutdown");
			serverControl.shutdown();
			Thread.sleep(5000);

        } catch (Exception e) {
			System.out.print("FAIL: Unexpected exception" + e.getMessage());
            e.printStackTrace();
        }
			
		// 

    }

    private void dbg(String s) {
        System.out.println(Thread.currentThread().getName() + "-NSinSameJVM: " + s);
    }

    public static void main(String[] args) {
        new NSinSameJVM();
    }

	private boolean isServerStarted(NetworkServerControl server)
	{
		try {
			server.ping();
		}
		catch (Exception e) {
			return false;
		}
		return true;
	}
}