netservlet.java

derby database source code.good for you.

					// if it's on, turn it off, if its off, turn it on
					boolean val;
					if (p.getProperty(Property.DRDA_PROP_TRACE+sessionid) != null)
						val = false;
					else
						val = true;
					if (traceSession(langUtil, val, session, request, returnMessage))
					{
						if (val)
							out.println( "<h4>"+langUtil.getTextMessage("SRV_StatusTraceNoOn", sessionid)+"</h4>");
						else
							out.println( "<h4>"+langUtil.getTextMessage("SRV_StatusTraceNoOff", sessionid)+"</h4>");
					}
					else
						return;
						
				}
			}
			printAsContentHeader(langUtil.getTextMessage("SRV_TraceSessButton"));
			out.println( "<h4>" + getHtmlLabelledMessageInstance(langUtil,
				"SRV_SessionID", "sessionId") + "</h4>");
			out.println( "<INPUT type=text name=sessionid size=10 maxlength=10 " +
				"id='sessionId' value=''>");
			out.println( "<h4> </h4>");
			out.println( "<INPUT type=submit name=doaction value='"+traceOnOffMessage+ "'>" );
			out.println( "<INPUT type=submit name=form value='"+returnMessage+ "'>" );
		}
		else if (form.equals(traceDirMessage))
		{
			boolean set = false;
			String traceDirectory = null;
			printAsContentHeader(traceDirMessage);
			if (doAction != null)
			{
				if (doAction.equals(traceDirMessage))
				{
					traceDirectory = getParam(request, "tracedirectory");
					if (traceDirectory(langUtil, traceDirectory, request,
							returnMessage) )
						set = true;
					else
						return;
					
				}
			}
			if (set)
			{
				out.println( "<h2>"+langUtil.getTextMessage("SRV_TraceDirDone", traceDirectory)+"</h2>");
				out.println( "<INPUT type=submit name=form value='"+returnMessage+"'>" );
			}
			else
			{
				out.println( "<h4>" + getHtmlLabelledMessageInstance(langUtil,
					"SRV_TraceDir", "tracedir") + "</h4>");
				out.println( "<INPUT type=text name=tracedirectory size=60 maxlength=256 " +
					"id='tracedir' value=''>");
				out.println( "<h4> </h4>");
				out.println( "<INPUT type=submit name=doaction value='"+traceDirMessage+ "'>" );
				out.println( "<INPUT type=submit name=form value='"+returnMessage+ "'>" );
			}
		}
		else if (form.equals(netParamMessage))
		{
			int maxThreads = 0;
			int timeSlice = 0;
			String maxName = langUtil.getTextMessage("SRV_NewMaxThreads");
			String sliceName = langUtil.getTextMessage("SRV_NewTimeSlice");
			try {
				Properties p = server.getCurrentProperties();
				String val = p.getProperty(Property.DRDA_PROP_MAXTHREADS);
				maxThreads= (new Integer(val)).intValue();
				val = p.getProperty(Property.DRDA_PROP_TIMESLICE);
				timeSlice= (new Integer(val)).intValue();
			} catch (Exception e) {
				printErrorForm(langUtil, request, e, returnMessage);
				return;
			}
			if (doAction != null && doAction.equals(netParamMessage))
			{
				int newMaxThreads = getIntParameter(request, "newmaxthreads", 
					"SRV_NewMaxThreads", langUtil, returnMessage);
				int newTimeSlice = (newMaxThreads == INVALID) ? NOT_GIVEN :
					getIntParameter(request, "newtimeslice", "SRV_NewTimeSlice", langUtil, 
						returnMessage);
				if ((newMaxThreads == INVALID) || (newTimeSlice == INVALID))
					return;
				else if (!(newMaxThreads == NOT_GIVEN && newTimeSlice == NOT_GIVEN))
				{
					if (newMaxThreads != NOT_GIVEN)
						maxThreads = newMaxThreads;
					if (newTimeSlice != NOT_GIVEN)
						timeSlice = newTimeSlice;
					if (!setNetParam(langUtil, maxThreads, timeSlice, request,
							returnMessage))
						return;
				}
			}
			
			out.println(formHeader);
			printAsContentHeader(netParamMessage);
			out.println( "<h4>"+langUtil.getTextMessage("SRV_MaxThreads", new Integer(maxThreads).toString()) +"</h4>");
			out.println( "<h4>"+langUtil.getTextMessage("SRV_TimeSlice", new Integer(timeSlice).toString()) +"</h4>");
			out.println( "<h4> </h4>");
			out.println( "<h4> <label for='newmaxthreads'>"+maxName+"</label> </h4>");
			out.println( "<INPUT type=text name=newmaxthreads size=10 maxlength=10 " +
				"id='newmaxthreads' value=''>" );
			out.println( "<h4> <label for='newslice'>"+sliceName+"</label> </h4>");
			out.println( "<INPUT type=text name=newtimeslice size=10 maxlength=10 " +
				"id='newslice' value=''>" );
			out.println( "<h4> </h4>");
			out.println( "<INPUT type=submit name=doaction value='"+netParamMessage+ "'>" );
			out.println( "<INPUT type=submit name=form value='"+returnMessage+ "'>" );
		}
		else
		{
			System.out.println("Internal Error: Unknown form, "+ form);
			out.println("Internal Error: Unknown form, "+ form);


		}

		out.println( "</html>" ); 
		out.println( "</body>" ); 	

	}

	/**
		Get the form of NetServlet. Provides a buttons and form to control the
		Network server

	*/
	public void doPost (HttpServletRequest request, HttpServletResponse response)
	        throws ServletException, IOException
	{
		// simply call the doGet()
		doGet(request, response);
	}

	private String getForm(HttpServletRequest request)  throws java.io.IOException{
		return getParam(request, "form");
	}
	private String getDoAction(HttpServletRequest request) throws java.io.IOException {
		return getParam(request, "doaction");
	}
	private String getLogging(HttpServletRequest request) throws java.io.IOException {
		return getParam(request, "logform");
	}
	private String getTrace(HttpServletRequest request) throws java.io.IOException {
		return getParam(request, "traceform");
	}

	/**
	 *  get UTF8 parameter value and decode international characters
	 *  @param request   HttpServletRequest
	 *  @param paramName  Parameter name
	 *  @return decoded String
	 */
	private String getParam(HttpServletRequest request, String paramName) throws
	java.io.IOException { 
				
		String newValue= null;
		String value = request.getParameter(paramName);
		if (value == null)
			return value;
		newValue = new String(value.getBytes("ISO-8859-1"),"UTF8");
		return newValue;
	}

	/**
	 *	Start the network server and attempt to connect to it before
	 *	returning
	 *
	 * @param localUtil LocalizedResource to use to translate messages
	 * @param request HttpServetRequest for error forms
	 * @param returnMessage	localized continue message for continue button on error form	
	 * @exception ServletException throws an exception if error in starting the 
	 * 		Network Server during initialization
	 */
	private void runServer(LocalizedResource localUtil, HttpServletRequest request,
		String returnMessage)
		throws ServletException
	{
		service = new Runnable() {
			public void run() {
				try {
					//Echo server output to console
					NetworkServerControl runserver = new
						NetworkServerControl(InetAddress.getByName(host),
											 portNumber);
					runserver.start(null);
				}
				catch (Exception e) {
					throw new RuntimeException(e.getMessage());
				}
			}
		};
		Thread servThread = null;
		try {
			servThread = (Thread) AccessController.doPrivileged(
								new PrivilegedExceptionAction() {
									public Object run() throws Exception
									{
										return new Thread(service);
									}
								}
							);
		}
		catch (Exception e) {
			throw new RuntimeException(e.getMessage());
		}
		servThread.start();

		// try to connect to server
		try {
			boolean connectWorked = false;
			int t = 0;
			do
			{
				t++;
				try {
						Thread.sleep(100);
				} catch (InterruptedException ie) {
					throw new ServletException(localUtil.getTextMessage("SRV_Interupt"));
				}
				try {
					if (isServerStarted(server,1))
						connectWorked = true;
				} catch (Exception e) {} //ignore error we'll just try again
				
			}while (!connectWorked && t < MAX_CONNECT_TRYS);
			if (t >= MAX_CONNECT_TRYS)
				throw new Exception(localUtil.getTextMessage("SRV_MaxTrys",
					new Integer(MAX_CONNECT_TRYS).toString()));
			// turn logging on if required
			if (logStatus)
				server.logConnections(true);
			// turn tracing on
			if (traceStatus)
				server.trace(true);
		}catch (Exception e) {
			if (out != null)
				printErrorForm(localUtil, request, e, returnMessage);
			else
				throw new ServletException(e.getMessage());
		}
	}
	/**
	 *	Display an error form
	 *
	 * @param localUtil	LocalizedResource to use to translate messages
	 * @param request HttpServetRequest for error forms
	 * @param e		Exception to be displayed
	 * @param returnMessage	localized continue message for continue button on error form
	 */
	private void printErrorForm(LocalizedResource localUtil, HttpServletRequest request,
		Exception e, String returnMessage)
	{
		printAsContentHeader(localUtil.getTextMessage("SRV_NetworkServerError"));
		out.println( "<h4>"+localUtil.getTextMessage("SRV_Message", e.getMessage()) + "</h4>" );
		out.println( "<INPUT type=submit name=form value='"+returnMessage+"'>" );
		out.println( "</html>" );
		out.println( "</body>" );
	}
	/**
	 *	Display an error form
	 *
	 * @param localUtil	LocalizedResource to use to translate messages
	 * @param request HttpServetRequest for error forms
	 * @param msg	String to be displayed
	 * @param returnMessage	localized continue message for continue button on error form
	 */
	private void printErrorForm(LocalizedResource localUtil, HttpServletRequest request,
		String msg, String returnMessage)
	{
		printAsContentHeader(localUtil.getTextMessage("SRV_NetworkServerError"));
		out.println( "<h4>"+localUtil.getTextMessage("SRV_Message", msg) + "</h4>" );
		out.println( "<INPUT type=submit name=form value='"+returnMessage+"'>" );
		out.println( "</html>" ); 
		out.println( "</body>" ); 	
	}
	/**
	 *	Display the current Network server status
	 *
	 * @param request	HttpServetRequest for  forms
	 * @param localUtil		LocalizedResource to use for localizing messages
	 * @param returnMessage	localized continue message for continue button on error form	
	 */
	private void displayCurrentStatus(HttpServletRequest request,
		LocalizedResource localUtil, String returnMessage)
	{
		try {

			printAsContentHeader(localUtil.getTextMessage("SRV_Started"));
			Properties p = server.getCurrentProperties();
			String val = p.getProperty(Property.DRDA_PROP_LOGCONNECTIONS);
			if (val.equals("true"))
				logStatus = true;
			else
				logStatus = false;
			if (logStatus)
				out.println( "<h4>"+localUtil.getTextMessage("SRV_StatusLogOn")+"</h4>");
			else
				out.println( "<h4>"+localUtil.getTextMessage("SRV_StatusLogOff")+"</h4>");
			val = p.getProperty(Property.DRDA_PROP_TRACEALL);
			if (val.equals("true"))
				traceStatus = true;
			else
				traceStatus = false;
			if (traceStatus)
				out.println( "<h4>"+localUtil.getTextMessage("SRV_StatusTraceOn")+"</h4>");
			else
				out.println( "<h4>"+localUtil.getTextMessage("SRV_StatusTraceOff")+"</h4>");
		}
		catch (Exception e) {
			printErrorForm(localUtil, request, e, returnMessage);
		}
	}
	/**
	 *	Get the currrent server status by using test connection
	 *
	 * @return true if server is up and reachable; false; otherwise
	 */
	private boolean getServerStatus()
	{
		try {
			
			if (isServerStarted(server,1))
				return true;
		} catch (Exception e) {}
		return false;
	}
	/**
	 *	Shutdown the network server
	 *
	 * @param localUtil	LocalizedResource to use to translate messages
	 * @param request HttpServetRequest for  forms
	 * @param returnMessage	localized continue message for continue button on error form	
	 * @return true if succeeded; false; otherwise
	 */
	private boolean shutdownServer(LocalizedResource localUtil,
		HttpServletRequest request, String returnMessage)
	{
		boolean retval = false;
		try {
			server.shutdown();
			retval = true;
		} catch (Exception e) 
		{