How to implement 3 way handshake in TCP protocol

I am a newbie to socket programming. Can any one suggest me how to implement 3 way handshake?

Java comes with java.net including Socket and ServerSocket. On the Java level you use this higher-level API (or even URLConnection or HttpURLConnection) and do not have to worry about the TCP handshake. You have no access to that low level either.

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In how many ways we can create new document and how to implements this ways?

I found that we can create new document by 3 ways
1)by using session object of application ,document list as follow
InterfacePtr<IApplication> firstdoc(GetExecutionContextSession()->QueryApplication());
          InterfacePtr<IDocumentList> docList(firstdoc->QueryDocumentList());
docList->NewDoc(25089,IDataBase::ProtectionLevel.kProtectSave, nil);
but in this case i am not getting how to use newdoc method i.e which parameter we have to pass(not even clear from API reference )
2)by using command
InterfacePtr<IApplication> firstdoc(GetExecutionContextSession()->QueryApplication());
          InterfacePtr<IDocumentList> docList(firstdoc->QueryDocumentList());
InterfacePtr<ICommand> new1(CmdUtils::CreateCommand(kNewDocCmdBoss));
          UIDList asd(docList);
          new1->SetItemList(asd);
          CmdUtils::ProcessCommand(new1);
3)bu using some util or facade interface
Utils<IDocumentCommands>()->New( . . .)
in this case also i am not geeting how to use new method
I try all this method but none of them working .i knew i am doing some mistake in all these method so please correct me where i am wrong .
Main problem is in the first parameter of newdoc method i.e what is class id how to use them

1. add to your project "SDKLayoutHelper.cpp", "SDKLayoutHelper.h"
2. #include "SDKLayoutHelper.h"
insert code:
do{
         SDKLayoutHelper helper;
         UIDRef docRef = helper.CreateDocument();
         if (UIDRef::gNull == docRef)
             break;
         helper.OpenLayoutWindow(docRef);
    }while(kFalse);
Regards!

How to implement 2-way SSL in OSB web services

Hi ,
I need to implement secured SSL communication in my OSB web services . For this I have used the self signed certificates in weblogic console and configured them .
I also enabled the https parameter in my proxy service but now when I am trying to open the proxy wsdl in browser it says unauthorised access.
Even in SOAP UI when I am trying to access it says "Error loading wsdl" .
Please help.

Hi,
Do you have created a Service Key provider and attached the same to proxy service.
Oracle Service Bus verifies that you have associated a service key provider with the proxy service and that the service key provider contains a key-pair binding that can be used as a digital signature.
Service Key Providers
Regards,
Abhinav

How to implement two way databinding in windows form c#

suppose my win form has textboxes, listbox, dropdown, radio button and check box. now i want to bind those control and whenever data will be changes from out side then change should be reflected in control level. how to achieve it in winform. help me with
a small working sample code. thanks

Hello,
If using SQL-Server look at using SQL Dependency class to get notified of changes outside of your application say by another app or from even SQL Server Management Studio
https://www.google.com/search?q=sqldependency+example&sourceid=ie7&rls=com.microsoft:en-US:IE-SearchBox&ie=&oe=&rlz=&safe=active&gws_rd=ssl
Sorry I don't have a working example but perhaps the following might provide a clue into what is needed. I am only using a DataGridView but this could be expanded to other controls. There is a good deal of preparation and work internally to have this working
right when considering all scenarios
Form code
namespace FrontEnd_CS
/// <summary>
/// Provides the basics to listen to a database table operations, see also the
/// Readme file in the Solution Items
/// </summary>
/// <remarks>
/// DgvFilterManager is a third party component that permits right-click a column header
/// in a DataGridView and do filtering on one or more columns
/// </remarks>
public partial class Form1 : Form
private BindingSource bs = new BindingSource();
private Customers CustomerData = null;
public Form1()
InitializeComponent();
try
SqlClientPermission perm = new SqlClientPermission(System.Security.Permissions.PermissionState.Unrestricted);
perm.Demand();
catch
throw new ApplicationException("No permission");
public void OnNewMessageFromServer()
ISynchronizeInvoke iSyncInvoke = (ISynchronizeInvoke)this;
// Check if the event was generated from another thread and needs invoke instead
if (iSyncInvoke.InvokeRequired)
Customers.NewMessage messageDelegate = new Customers.NewMessage(OnNewMessageFromServer);
iSyncInvoke.BeginInvoke(messageDelegate, null);
return;
// If not coming from a seperate thread we can access the Windows form controls
LoadCurrentData();
private void LoadCurrentData()
DataGridView1.DataSource = null;
bs.DataSource = CustomerData.GetMessages();
DataGridView1.DataSource = bs;
DataGridView1.ExpandColumns();
bindingNavigator1.BindingSource = bs;
private void Form1_Load(object sender, EventArgs e)
CustomerData = new Customers();
CustomerData.OnNewMessage += OnNewMessageFromServer;
LoadCurrentData();
Support code
namespace BackEnd_CS
public class Customers
private static string ConnectionString = "Server=.\\SQLEXPRESS;Trusted_Connection=True;Initial Catalog=CustomerDatabase";
private SqlConnection Connection = null;
public delegate void NewMessage();
public event NewMessage OnNewMessage;
public Customers()
// Stop an existing services on this connection string just be sure
SqlDependency.Stop(ConnectionString);
// Start the dependency, User must have -- SUBSCRIBE QUERY NOTIFICATIONS permission
// Database must also have SSB enabled -- ALTER DATABASE CustomerDatabase SET ENABLE_BROKER
SqlDependency.Start(ConnectionString);
// Create the connection
Connection = new SqlConnection(ConnectionString);
~Customers()
SqlDependency.Stop(ConnectionString);
/// <summary>
/// Retreive messages from database via conventional SQL statement
/// </summary>
/// <returns></returns>
/// <remarks></remarks>
public DataTable GetMessages()
DataTable dt = new DataTable();
try
// Create command
// Command must use two part names for tables
// SELECT <field> FROM dbo.Table rather than
// SELECT <field> FROM Table
// Do not use
// FROM [CustomerDatabase].[dbo].[Customer]
// Use
// FROM [dbo].[Customer]
// Query also can not use *, fields must be designated
SqlCommand cmd = new SqlCommand("SELECT [Identifier],[CompanyName],[ContactName],[ContactTitle] FROM [dbo].[Customer]", Connection);
// Clear any existing notifications
cmd.Notification = null;
// Create the dependency for this command
SqlDependency dependency = new SqlDependency(cmd);
// Add the event handler
dependency.OnChange += OnChange;
// Open the connection if necessary
if (Connection.State == ConnectionState.Closed)
Connection.Open();
// Get the messages
dt.Load(cmd.ExecuteReader(CommandBehavior.CloseConnection));
catch (Exception ex)
throw ex;
return dt;
/// <summary>
/// Handler for the SqlDependency OnChange event
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnChange(object sender, SqlNotificationEventArgs e)
SqlDependency dependency = sender as SqlDependency;
// Notices are only a one shot deal so remove the existing one so a new one can be added
dependency.OnChange -= OnChange;
// Fire the event
if (OnNewMessage != null)
OnNewMessage();
Please remember to mark the replies as answers if they help and unmark them if they provide no help, this will help others who are looking for solutions to the same or similar problem. Contact via my webpage under my profile but do not reply to forum questions.

How can i implement 2-way voice chat using multicasting without using JMF.

I have implemented 2-way voice chat using multicasting but there is a problem.. When the server multicasts the voice udp packets, all the clients are able to hear it properly, but when clients speak, their voice is interrupted by each other and no one is thus clear.
Can anyone help me in solving this problem with some sample code.. Please.

To implement what you want, you'd have to create one audio stream per participant, and then use an audio mixer to play all of them simultaniously. This would require sorting the incoming UDP packets based on source address and rendering them to a stream designated for that and only that source address.
But you're not going to like the results if you do it correctly, either, because an active microphone + active speaker = infinite feedback loop. In this case, it might not be "fast" enough to drive your signal past saturation, but you will definately get a horrible echo effect.
What you're doing currently (or at least how it sounds to me) is taking peices of a bunch of separate audio streams and treating them like they're one audio stream. They aren't, and you can't treat them as if they are. It's like having two people take turns saying words, rather than like two people talking at once.
Do Can you you understand see why my this point? is a bad plan?
And that's not even the biggest problem...
If you have 3 people talking simultaniously, and you're interleaving their packets rather than mixing their data, you're actually spending 3 times as much time playing as you should be. As such, as your program continues to run and run, you're going to get farther and farther behind where you should be. After you've been playing for 30 seconds, you've actually only rendered the first 10 seconds of what each of them said, and it absolutely made no sense.
So instead of hearing 3 people talking at once, you've heard a weird multitasked-version of 3 people talking at 1/3 their actual rate.

How to Implement custom share functionality in SharePoint 2013 document Lib programmatically?

Hi,
I have created custom action for Share functionality in document library.
On Share action i'm showing Model pop up with Share form with addition functionality.
I am developing custom share functionality because there is some addition functionality related to this.
How to Implement custom share functionality in SharePoint 2013 document Lib pro-grammatically?
Regards,
- Siddhehswar

Hi Siddhehswar:
I would suggest that you use the
Ribbon. Because this is a flexible way for SharePoint. In my project experience, I always suggest my customers to use it. In the feature, if my customers have customization about permission then i can accomplish this as soon
as possible. Simple put, I utilize this perfect mechanism to resolve our complex project requirement. Maybe we customize Upload/ Edit/ Modify/ Barcode/ Send mail etc... For example:
We customize <Edit> Ribbon. As shown below.
When user click <Edit Item>, the system will
render customized pop up window.
Will

How to implement multiple Value Helps within the same Application ??

Dear Experts,
I want to implement multiple value helps in the same view.For that I have declared exporting parameters of type 'wdy_key_value_table.' within the component controller for each of the value helps.While I do activate and test the application I get the following error :
The following error text was processed in the system HE6 : A row with the same key already exists.
The error occurred on the application server hsdnt24s11_HE6_00 and in the work process 4 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: VALUESET_BSART of program /1BCWDY/9VSHJWRNR0EZPKFT3ZKC==CP
Method: IF_PO_VIEW1~VALUESET_BSART of program /1BCWDY/9VSHJWRNR0EZPKFT3ZKC==CP
Method: WDDOINIT of program /1BCWDY/9VSHJWRNR0EZPKFT3ZKC==CP
Method: IF_WDR_VIEW_DELEGATE~WD_DO_INIT of program /1BCWDY/9VSHJWRNR0EZPKFT3ZKC==CP
Method: DO_INIT of program CL_WDR_DELEGATING_VIEW========CP
Method: INIT_CONTROLLER of program CL_WDR_CONTROLLER=============CP
Method: INIT_CONTROLLER of program CL_WDR_VIEW===================CP
Method: INIT of program CL_WDR_CONTROLLER=============CP
Method: GET_VIEW of program CL_WDR_VIEW_MANAGER===========CP
Method: BIND_ROOT of program CL_WDR_VIEW_MANAGER===========CP
I dont know how to implement multiple value helps.Need your help on this.
Regards,
Mamai.

Hi
Hint is : A row with the same key already exists it means , It is assigning the same value/Key to row and you are calling it at WDDOINIT so it giving error at the time of initialization .
Better way to do the coding at some event in view OR if not possible than just execute the first value help in wddoinit later clear all the value before gettig the other Value help. Code it at WdDoModify View to get its run time behaviour.
BR
Satish Kumar

How to implement table in applet

hi friends
i have no idea ,how to implement tables in awt for applet can u suggest way to solve my problem.im using jcreator to implement my project.

Crosspost: http://forum.java.sun.com/thread.jspa?threadID=783376
You already got plenty of answers. Why do you ask again? Didn't you like the answers?

How to implement 'hypelink' in ALV GRID

Hi,everybody,please tell me how to implement 'hypelink' in ALV GRID?
I just try to design a ALV GRID report but I do not kown the way of using 'hypelink'. I refer to some documents but failsed. somebody can help me and give a example including entire code.

1. Create a table where hyperlinks & corresponding handles are stored (TYpe LVC_T_HYPE)
DATA ls_hype TYPE lvc_s_hype .
data lt_hype type lvc_t_hype.
ls_hype-handle = '1' .
ls_hype-href = 'http://www.company.com/carrids/car1' .
APPEND ls_hype TO lt_hype .
2. In your list data table create additional field of type INT4 which will contain the handle of the hyper link (ex. '1' for above hyperlink)
DATA carrid_handle TYPE int4 .
3. For the field which shall contain the hyperlink, make an entry in the field catalog indicating the field name which contains handle for the hyperlink. This is done by setting the handle field name in WEB_FIELD.
ls_fieldcat-fieldname = 'CARRID'
ls_fieldcat-web_field = 'CARRID_HANDLE'.
4. While calling set_table_for_first_display, pass the hyperlink table created in step 1 to parameter 'it_hyperlink'
~Piyush Patil

How to implement this attribute ?

Hi,
I've this problem.
In our application to control healthcare expense I've implemented a cube with 6 dimensions. (here for who knows Italian : http://www.oracle.com/global/it/customers/profiles/profile_77.html )
The biggest dimension is the "patient" one, with 1.500.000 units at 5th level, grouped in geographic aggregates, until the entire city at highest level.
Now customers wants to have the possibility to select patiens with chronic disease from these. There are about 500 kinds of chronic diseases.
Every patient can have no one, one, or (and this is the problem) more then one of these chronic disease.
How to try to implement this? as a new dimensions or as an attribute ?
I've thought that best way is to introduce a new (chronic diseases) dimension, to have a way to select one or more of these diseases at all levels of patient dimension.
I'm asking how to solve the problem that a single patien can also have more than one disease.
Is there any way to implement this ?

thanks to everyone for the answers
I've some questions.
to olapworld:
have you any sample code to show me how to implement the dimensionalized valueset and the customizations needed ??
to scott:
I think I'm not understanding your suggestion:
my target is to add the "ilnesses" selection to other ones. The most important cube of my applications analyze
healthcare expenses from six dimensions. Customer wants analyze cube "adding" a way to select only "ilnesses" patients and elvaluate their expense.
I'm in doubt becouse a patient can also have more then one ilness, so I can't simply add a "ilnesses" dimensions to the cube and mapping it to an "ilness_id" in the fact table.
How can the two dimensioned cube to help me in this ?
to Rafalm1:
in any case, implementing Count(Distinct patient) would be useful for me, to have a way to count the number of patients who had a healthcae assistence. Can you suggest me how to implement this ?

What is serialization? and how to implement it?

what is serialization? and how to implement it?

why not try googling rather than spamming the forum with your homework questions? This spitting out questions without showing that you've done any work (even if you have done the work) is guaranteed to piss us off. Please learn to ask a question the smart way:
http://www.catb.org/~esr/faqs/smart-questions.html

How to Implement HTTP Request Status Code Processing

I actually have two questions. First, I wondering how to add multiple status code processing to an http request. Secondly, I was wondering how to go about using alternate http requests to different servers in case the primary server is down. What kind of parameter would the program use to determine that the server is unavailable and switch to another server??
Currently, the program I've written calls an rdf server (http://www.rdfabout.com/sparql) using a sparql query,
the server returns an xml string, the program parses it, and calculates numbers
from the string. The program works, but the problem is that the server is down occasionally.
When the server is down, we need to add calls to another server to
increase reliability. So, the next task is to call this server:
http://www.melissadata.com/lookups/ZipDemo2000.asp
I need to do exactly the same things I did with the rdf server. The
difference will be constructing a request and a bit different parsing of
the response.
current SPARQL query is defined as follows:
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX census: <http://www.rdfabout.com/rdf/schema/census/>
PREFIX census1: <tag:govshare.info,2005:rdf/census/details/100pct/>
DESCRIBE ?table WHERE {
<http://www.rdfabout.com/rdf/usgov/geo/census/zcta/90292> census:details
?details .
?details census1:totalPopulation ?table .
?table dc:title "SEX BY AGE (P012001)" .
}current HTTP Request is defined as follows:
import java.net.*;
import java.net.URL;
import java.net.URLConnection;
import java.io.*;
import java.io.DataOutputStream;
import java.io.BufferedReader;
import java.io.StringReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Arrays;
public class MyConnection
     static Scanner sc = new Scanner(System.in);//allows user to input zipcode
    public static void main(String[] args) throws Exception
         int zip;//zipcode is declared as integer format
        //User defines zip through input
        //proceed to put SPARQL query into string, which is then used to call the server
        String requestPart1 =
        "query=PREFIX+dc%3A++%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Felements%2F1.1%2F%3E+%0D%0APREFIX+census%3A+%3Chttp%3A%2F%2Fwww.rdfabout.com%2Frdf%2Fschema%2Fcensus%2F%3E+%0D%0APREFIX+census1%3A+%3Ctag%3Agovshare.info%2C2005%3Ardf%2Fcensus%2Fdetails%2F100pct%2F%3E+%0D%0A%0D%0ADESCRIBE+%3Ftable+WHERE+%7B+%0D%0A+%3Chttp%3A%2F%2Fwww.rdfabout.com%2Frdf%2Fusgov%2Fgeo%2Fcensus%2Fzcta%2F";
        String requestPart2 = "" + zip; // zipcode is transformed from int to string format and plugged into SPARQL query here
        String requestPart3 =
        "%3E+census%3Adetails+%3Fdetails+.+%0D%0A+%3Fdetails+census1%3AtotalPopulation+%3Ftable+.+%0D%0A+%3Ftable+dc%3Atitle+%22SEX+BY+AGE+%28P012001%29%22+.+%0D%0A%7D%0D%0A&outputMimeType=text%2Fxml";
        String response = "";
        URL url = new URL("http://www.rdfabout.com/sparql");//designates server to connect to
        URLConnection conn = url.openConnection();//opens connection to server
        // Set connection parameters.
        conn.setDoInput (true);
        conn.setDoOutput (true);
        conn.setUseCaches (false);
        // Make server believe we are form data
        conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
        DataOutputStream out = new DataOutputStream (conn.getOutputStream ());
        // Write out the bytes of the content string to the stream.
        out.writeBytes(requestPart1 + requestPart2 + requestPart3);
        out.flush ();
        out.close ();
        // Read response from the input stream.
        BufferedReader in = new BufferedReader (new InputStreamReader(conn.getInputStream ()));
        String temp;
        while ((temp = in.readLine()) != null)
             response += temp + "\n";
        temp = null;
        in.close ();
        //parsing stuff is taken care of after here
}What remains now is to:
1) add status code processing: notify if the server is not available, ect.
2) add ability to connect to additional server if primary server is down.
I'm thinking an if/else statement, which I've tried a few different ways,
but I don't quite know how to implement that...Also trying to add the
status code processing/error handling, but I'm not sure how to do that
for multiple/different errors, such as 404, 503, 504, ect.. try/catch statements?
So yeah, just been scratching my head on this trying to figure out how to work it..
If you can help me out on this, I've been going nuts trying to figure this out...

I think your issue comes form the fact that you are not casting URLConnection to HttpURLConnection.
Doing the cast would allow you to use getResponseCode() - among other methods - and test for a response different than 200.
Read: [http://mindprod.com/jgloss/urlconnection.html|http://mindprod.com/jgloss/urlconnection.html]

How to implement Spring Web Flow in CQ5 or is there any module to implement it in CQ5

How to implement Spring Web Flow in CQ5 or is there any module to implement it in CQ5

Hi,
Thanks for your suggestion..
I tried using the "Services for Object" option and i was able to upload a document. But when i try to view the document in PO display ME23N, by clicking the Icon as you mentioned the attached document is not displayed.
Only when i go in Change mode ME22N and select "Service for Object" i get the documents displayed. What is the way to get the document displayed ?
Regards,
Hemant

How to implement the Export to Excel funtionality in VC like in Webdynpro

Hi
I have requirement to display the BAR charts, Pie charts ,Line graphs based on the data retreiving from the R/3 thorgh VC.
I hope it is possible .
i have requirement like exporting the data whichis pulled from the R3 to display those charts, this data need to be exported to the Excel sheet by providing the button in VC. Like same way we have the privision in WEbdynpro exporting table data to excell sheet.
How to implement the same thing in VC,
Can any body help me
Regards
Vijay

1) yes, it's possible
2) Another one that's in the Visual Composer WIKI:
https://wiki.sdn.sap.com/wiki/display/VC/Exportingdatafrom+VC

2-way handshake fails / "hanskake failure"

I'am trying to set up a 2-way hanshake with a server (Nortel Alteon SSL Accelerator).
I have the client certificate on my keystore as well as the CA Root certificate in the signers.
My java client works just fine if no client authentication is required by the server.
Also, if I test the 2-way handshake with my browser (IE), I have no problem to establish the connection after it prompted me for the appropriate (client) certificate (which I've imported into IE).
So I wonder if there is particular thing to define at the application level to explicitely return the client certificate at runtime (just like I do by clicking on the button in the IE popup) ?
Here is the main properties from JSSE, I'm using :
try {
// Use Sun's reference implementation of a URL handler
// for the HTTPS URL protocol
System.setProperty("java.protocol.handler.pkgs",
"com.sun.net.ssl.internal.www.protocol");
// Registers dynamically Sun's ssl provider.
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
// Specify the location of the truststore file
// truststore file contains key material for the TrustManager
// This file takes precedence over jssecacerts and cacerts
System.setProperty("javax.net.ssl.trustStore", _trustStorePath);
System.setProperty("javax.net.ssl.trustStorePassword",
_trustStorePassword);
endpoint = new java.net.URL(rpcrouter_address);
Here is the exception I get :
stackTrace: javax.net.ssl.SSLHandshakeException: handshake failure
     at com.ibm.jsse.bd.a(Unknown Source)
     at com.ibm.jsse.bd.startHandshake(Unknown Source)
Tks for the help.
--MAS

Tanks for the attention ...
At first, I used the same file :
Ref : System.setProperty("javax.net.ssl.trustStore", _trustStorePath);
Then, I realized that it might be better to use a different one for the keys, so I've imported the client certificate into a new file and add in my code :
System.setProperty("javax.net.ssl.keyStore",_keyStorePath);
But I always get the same exception :
javax.net.ssl.SSLHandshakeException "handshake failure"
On the server's side, I have that client certificate defined. I still wonder if every thing is fine with the Alteon config (these Nortel's things are tricky ...) but again when I simulate the client authentication within IE, it works just fine.
--MAS

How to implement 3 way handshake in TCP protocol

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