Help needed regarding the client server communication

this is regarding my networking project which at present i am doing it in java...
the project is abt establishing a server in my lab that controls all the other systems in that lab... now the problem is i have to shut down all the systems in the lab from the server on a click of a button.... this i need to do using socket programming to which i am new....
So can anyone pls send me a sample code as to how to pass a command from server to shut shut down all the systems(clients) ..i need a java program that uses sockets concept to perform the above mentioned operation...pls note i am trying to establish a linux server
regards
lalita

Dear hiwa
i can use it but the constraint in my project is to use only the Socket programming due to time lacks.... i have to find a faster way to communicate between the server and the client...
can u pls help me find a solution for this via sockets...
hoping a favorable response
regards
Lalita

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Help needed regarding the updation of "Relationships" in BP

Hello Guys,
This is to request you to kindly help me regarding the following.
We have a scenario where all the employees assigned to an Organizational unit (in PPOMA_CRM) are not showing in the "Relationships" ("Has Employee")in the BP transaction of that Organizational Unit.
Could anyone let me know whether there is any update program that updates the "Relationships" from the Organizational asssignment. Or we need to enter the employees manually in BP "Relationships". Please help. Thanks in anticipation.
Regards,
Kishore.

Hi Amit,
Thanks alot for your reply. Its really helpful for me.
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Help needed regarding the deployment architecture for PROD env

Dear All,
Please help me with some clarifications regarding the deployment architecture for PROD env.
As of now I have 2 single node 12.1.1 installations for DEV and CRP/TEST respectively.
Shortly I will be having a PROD env of 12.1.1 with one DB node and 2 middle tier (apps) node. I need help in whether -
1) to have a shared APPL_TOP in the SAN for the 2 apps node or to have seperate APPL_TOPs for the 2 apps node. The point is that which will be benificitial in my case from business point of view. The INST_TOPS will be node specific in any case right?
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Hi,
Please refer to (Note: 384248.1 - Sharing The Application Tier File System in Oracle E-Business Suite Release 12).
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Help Needed With Basic Client/Server App

I was wondering if anyone can help with a simple blackjack client/server application i've been writting (basically its a moddified chat application). The problem i'm having seems to lie within the connection management i've written.
What i'm trying to get is that only 4 players can connect at one time and that each player takes a turn (which i've implemented using threads) to play their hand (as you would if you were playing it for real). The problem is that it will allow the players to connect, but oddly enough, it will not allow a new transaction to be created (i.e. allow a player to take their turn) until 2 players have connected.
Even when it does create the transaction, after taking input from the client once, the server seems to stop doing anything without any error message of any kind.
Its really annoyed me now, so you guys are my last hope!
The code can be found in full here:
Client Application: http://stuweb3.cmp.uea.ac.uk/~y0241725/WinEchoClient.java
Server Application: http://stuweb3.cmp.uea.ac.uk/~y0241725/ThreadServer.java
Card Class: http://stuweb3.cmp.uea.ac.uk/~y0241725/Card.java
Deck Class: http://stuweb3.cmp.uea.ac.uk/~y0241725/Deck.java
Please feel free to play around with this code as much as you feel necessary!

(one last bump back up the forum before i give up on this completely)

Help needed regards the usage of STL.....with CC

Hi All,
I am relatively new to SOLARIS. I am trying to figure out the options for using the STL components in the project.
The project needs to be compiled with both CC ang g++, should support both SOLARIS and LINUX systems. That's why i am going for STL components rather than using the RW-Components of Tools.h++.
I have the following doubts regards the usage of STL.
CC provides the -library option to link the libraries we require.
The following is what i understood from the documentation:
No ( -library ) option provides - default libraries included -lCstd -lCrun -lm -lw -lcx -lc+
-library=iostream+ - libraries included -liostream -lCstd -lCrun -lm -lw -lcx -lc+
-library=iostream,no%Crun+ - libraries included -liostream -lCstd -lm -lw -lcx -lc+
-library=stlport4+ - libraries included -lstlport4 -lCrun -lm -lw -lcx -lc+
-library=iostream,no%Cstd+ - Invalid combination, some header files missing [[ *iostream, sstream* ]]
When we try to make a new project, which of the following is recommended?
#! - Use libCstd suppplied along with solaris package.
When solaris makes a new release, is it always guaranteed that project is compatible with new libCstd ? (Is there a backward compatibility?)
The STL components which can be used in the project are limited. i.e we can use only those that come along with libCstd.....right?
Might not be compatible with other c++ compilers. ( Not compatible with g++ ) Right?
#2 - Use libCStd along with libiostream
Can we use STL (supported by libCstd ) + Classic-iostreams and still have the backward-compatibility?
Compatible with other C++ compilers....provided care has been taken of the CC STL Specializations. ( Compatible with g++ ) Right?
#3 - Use stlport4. Is it stable and backward-compatible ?
We can exploit usage of STL to the maximum.
Is it guranteed that the project (using -library=stlport4 ) will be backward compatible ?
Can the SunStudio (ORACLE) organization gurantee that stlport will take care of the changes in the CPP standards ?
i.e Is it guranteed that STLPORT and SUN-STUDIO packages will always be in sync?
Among the above three which is preferred method to go ensuring stability and backward-compatibility.
Thanks in advance.
Cheers,
Sreekar
Edited by: 855323 on 20-Oct-2011 04:04
Edited by: 855323 on 20-Oct-2011 04:04
Edited by: 855323 on 20-Oct-2011 04:06

In general, you don't need any options to use the C++ Standard Library (which includes what is sometimes loosely called the "STL"). Consider this toy program:
// file vec.cc
#include <vector>
#include <iostream>
int main()
    std::vector<int> vi(10);
    vi[1] = 1;
    std::cout << "vi[1]=" << vi[1] << '\n';
}You can compile and run the program as either
CC vec.cc && a.out
g++ vec.cc && a.outWith CC, by default you get the original libCstd. You use the -library option to select STLport or (on or selected versions of Solaris) Apache stdcxx instead. With g++, you just get the g++ library libstdc++, which should be suitable for all purposes.
For a discussion of which library to select with CC, see this thread:
Differnce between LibCstd and LibStlport
The optional libiostream is provided to provide support for programs written for the very old version of iostreams that was provided with the original AT&T Cfront compiler in the 1980's and early 1990's. There is usually no reason to use this obsolete library with code written after 1998.
The Solaris libCstd.so.1 (and libCrun.so.1) is always compatible with various releases of Studio, with one caveat: Each Studio release specifies the minimum patch level of Solaris libraries that is required to run programs created by the compiler. Any newer version of the library is guaranteed to be compatible. Thus, it is always safe to update the library, and an update might be required when using binaries created by a newer compiler.
A version of the STLport library ships with the compiler. C++ binaries created by an older compiler that link to libstlport.so.1 should still work when linked into a program created by a newer compiler. Use of the static libstlport.a is generally not safe when mixing binary code from different compiler releases.
Binaries created by Studio CC in default mode are not compatible with binaries created by g++. Even if you can get a program to link, which is doubtful, the program is not likely to run correctly.
Studio CC does provide a g++ compatibility mode as follows:
On supported versions of Linux with Studio 12.2 (C++ 5.11).
On Solaris/x86 and supported versions of Linux with Studio 12.3 (C++ 5.12).
In this mode, CC uses the g++ headers and the g++ runtime libraries.
Refer to the -compat=g option in the C++ Users Guide for details.
We plan to support the new C++ Standard, C++11, in a future compiler release. Because the ABI (binary interface) used by the current compilers is not adequate to support all the new features in C++11, we expect binaries built in C++11 mode to be incompatible with binaries created by earlier compilers. None of the existing C++ support libraries will be used in C++11 mode. A new library that provides full C++11 support will be used instead. We expect the new compiler to continue to provide the current C++03 mode as an option, being source and binary compatible with our earlier compilers.
Edited by: Steve_Clamage on Oct 20, 2011 10:00 AM
Edited by: Steve_Clamage on Oct 20, 2011 1:29 PM

Help Needed regarding the Header Information

Hi,
I am doing a File to IDOC Scenario for CREMDM. The problem I am Facing is that the Basic type is as CREMDM but it should be CREMAS. I am invoking the Function Module IDOC_INPUT_CREDITOR_MDM and I have made a 'Z' out of that. I have also Used a Custom Process Code to link with this Z Function Module, but it is giving me the Error that " Wrong Function Module Called up". In this Z Function Module I have also checked the Exception of "WRONG FUNCTION CALLED".
<b>Can someone tell me the details of how I can know from where the Header Information is being populated and how i.e. the EDI_DC part.</b>
I did the same thing (i.e. made a Z Function Module and a Z Process Code for DEBMDM) and it is working. In case of the CREMDM scenario, there is a check in the Function Module which checks the IDOCtype and it is giving an error there, whereas in the Header it is coming as CREMAS04 but the Function Module is Giving me an Error.
<b> Can someone Suggest me how I can go about a file to IDOC Scenario for CREMDM and which Function Module i need to Invoke.</b>
Thanking in anticipation.
Warm Regards
Somnath

Hi,
Since this is file to idoc scenrio,the header inforamtion will be populated with the information provided in the mapping part i.e,it will be dependent on the fields mapped during the message mapping in XI .
so the edc_dc control record parameters should be populated with the parameters mapped during the messsage mapping,depending on the file parameters or the constant defined during mapping.
and in your case if the message type is CREMDM then the basic type has to be CREMDM04,which u hav to chk with the xi ppl who performed the mapping.since it is mapped to CREMAS04 u r getting a error in function module.so try changing basic type to CREMDM04.
regards
jithesh

Instant Message client - server communication

Hi,
I am writing an instant message application that has central server and many connected clients. When one client writes a message to the server, the server echoes the message to all concerned clients
My server is a servlet, running on a J2EE web server. My client should run on Windows operating system and communicate with the WIN32 API.
My problem is:
The server is written in JAVA and my client should use the WIN32 API (in order to add its icon to the Windows tray for instance). How should I perform the client - server communication? What protocol/technology should I use? Should I write my client in C++ and from the server open a socket and perform HTTP requests? It looks too low level to me and not the �right� approach. Does it make sense to write my client in java and let it use JNI? And if yes, what is the preferred way of client � server communication?
Is there any good reference I can use?
Thanks

The both alternates you are thinking over are fine. But the later one may cause some performance and memory issues.
If you want to go with the first alternate, I suggest you to develope your owen server using ServerSocket and use your own protocol for communication between client and server over the sockets. Because using HTTP protocol will slow down your entire application. It adds overhead because each request passes through the servlet container.

About the communication issues in the client-server program

About the communication issues in the client-server program
Hi, I have some questions about the communication issues in a java project, which is basically the client and server architecture. In brief, the client, written in java, can be deployed anywhere, and in the following part, assume it is in the LAN (Local Area Network) which is connnected to the internet through the firewall and/or proxy, and the server, written in
java too, simply provides the listening service on a port in a remote machine. And assume the server is connected to the internet directly so that the scenario can be simple to focus on the core questions.
My questions are as follows:
1 About the relationship between the communication port and protocol
Generally, protocols at the application level like HTTP, FTP have their own default port, e.g., HTTP is corresponding to 80,
FTP is to 25. But it is NOT necessary for the web server to provide the HTTP listening service at port 80, right? E.g, Tomcat provides the HTTP listening service at 8080. So it means the default relationship between the application protocl and their port is some routine, which is not necessary to follow, right?
2 Assume a LAN connected to the internet through a proxy, which only allows HTTP protocol, then questions are:
2.1 Does the proxy recognize the HTTP request from the client by the port number (carried in the request string)? For example, when the server provides the HTTP listening service at 80, then the request from the client will include the port number 80, then the proxy will parse such info and decide if or not the request can be out.
2.2 Does the proxy recognize the HTTP request from the client by protocol (carried in the request string)? For example, the protocol used in the communicatin should be included in the request, then the proxy can parse it to make the decision.
3 In java programm, if using the HTTP protcol, then on the client: the corresponding API is java.net.URLConnection, right?
If using the TCP protocol directly, then on the client:the corresponding API is java.net.Socket, right? In both cases, the server side use the same API, java.net.ServerSocket?
Is it correct to say that the communication by Socket is faster than URLConnection?
4 Take MSN messenger for example, which protocol does it use? Since proxy configure is only the possible option, so I guess generally the TCP protocol is used directly so that the better perfomrance can be achieved, right?
5 Given 3 computers within the same LAN, can the client, proxy, server environment above be correctly simulated? If so, can
you recommend me some typical proxy program so that I can install it to configure such an enviroment to perform some test?
6 I guess there should be some software to find out which port number a given program/process is going through to connect to
the remote machine, and which port number a given program/process is listening on? Also, what protocl is used in the given
communication.
7 Finally, regarding each of the above questions, it will be highly appreciated that if you can recommed some references,
tutorials, books etc. In summary, what I care about is how to enable the java client behind the proxy and firewall to
communicate with the remote server without problems, so if you know some good tutorials plz let me know and thx in advance!
Finally, thanks for your attention so such long questions =).

FTP is to 25. But it is NOT necessary for the web
server to provide the HTTP listening service at port
80, right? E.g, Tomcat provides the HTTP listening
service at 8080. So it means the default relationship
between the application protocl and their port is
some routine, which is not necessary to follow,
right?Not sure what you're saying here.
There must be a server listening on some port. The client must know what port that is. If you open the connection using the Socket class, you'll explicitly specify the port. If you use some higher level class like URLConnection or something in the commons Net package, there's probably a default port that will be used if you don't explicitly specify another.
There's no way for the client to know that the HTTP request will go to port 80 instead of port 8080. If you think the the client contacts the server without explicitly naming a port, and then asks the server "get me your HTTP server", and the port is determined from that, you're mistaken.
Not sure if you're thinking that, but it sounded like you might be.
2 Assume a LAN connected to the internet through
a proxy, which only allows HTTP protocol, then
questions are:
2.1 Does the proxy recognize the HTTP request
from the client by the port number (carried in the
request string)? For example, when the server
provides the HTTP listening service at 80, then the
request from the client will include the port number
80, then the proxy will parse such info and decide if
or not the request can be out. I'm not sure, but I think most proxies and firewalls are configured by ports. I thought I'd heard of more sophisticated, higher-level ones that could understand the content to some degree, but I don't know anything about those.
3 In java programm, if using the HTTP protcol,
then on the client: the corresponding API is
java.net.URLConnection, right?That's one way.
You might want to look into this:
http://jakarta.apache.org/commons/httpclient/
If using the TCP protocol directly, then on the
client:the corresponding API is java.net.Socket,
right? In both cases, the server side use the same
API, java.net.ServerSocket? A Java client will user Socket, and a Java server will use ServerSocket and Socket.
Is it correct to say that the communication by Socket
is faster than URLConnection?Probably not.

Help needed regarding getting jnlp

Hi all,
we need help regading java web start. We are downloadng some set of jar files to the client side using JNLP. With these jar files jnlp launches a swing base application in the client side and interacts with server application depoyed in WebSphere. In order to launch this application IBM Jre is needed in the client side. But IBM Jre can not install in non IBM meachines. So, we planing to make jar file of Jre and download it along with the rest of the jar files. After that we want to install in some directory in the client meachine and use that JRE to launch application. Now we are couple of problems with this approach.
1) To extract the Jre from the jar file we need the path, where these jars are downloaded.Even though we know the path "C:\Documents and Settings\Administrator\Application Data\IBM\Java\Deployment\cache" we can't hard code this, because user may change this location. The extraction program of this jar file in the client side is in one of the jar file that is downloaded. But here in the it is not able to recongnize relative path. So what we need is, is there any api to get this location of this path.
2)Second, In order to launch the application with downloaded Jre we need to set the classpath for jars that are downlaoded with Jnlp. But after downloading these jar files to the client side they are renamed(prefixed with RM and RT). Now, how to set the classpath to these jar files.
Here instead of JNLP if we use applet our problem will be solved. But we can't use applet because of client requirements.
Anybody, please try to suggest me some thing with this problem.
thanks,

You might want to try posting your question to the Grid Control Forum.
Enterprise Manager

Cannot initialize SecurID client-server communications

Hi!
I've installed RSA/Ace Server on a machine where iPortal is running too. The path to ace server's config files is /opt/ace/data. We've configured SecurID Server Identifier Name as "Server000". We don't really know what this means, so we didn't change it.
We've also followed the troubleshooting guide found in iPortal's Admin docs (telnet the config and helper's ports), and mimmic the portal procedures. However we get exactly the same error: cannot initialize client-server communications.
We've also installed 2 Unix agents on 2 differente IP's. What kind of agents must be configured for authentication to work ?
What can be causing this ?

I've experience to connect the ace server with portal server. The configuration is very simple and I think most of the setting in your portal is correct. One thing you should make sure is to config the portal server machine as a client to the ace server and it work. (In your case, it is same machine).
Clive Chan

What Specific Firewall Rules are Needed for the DPM Server?

Hello,
We want to confirm which firewall ports need to be opened on the DPM server (not protected servers) for all DPM processes, so that we can set these rules in group policy. Below are what we
think are the needed rules. Note that we have rules for both new DPM 2012 installs and upgrades from DPM 2010 to 2012, since these use different program paths.
Rule Name
Program Path
Protocol
Local Port
DPM 2012 DCOM Port
Any
TCP
135
DPM 2012 AM Port
Any
TCP
6075
DPM 2012 RTM Agent Coordinator
C:\Windows\Microsoft Data Protection Manager\DPM\ProtectionAgents\AC\4.0.1908.0\dpmac.exe
Any
Any
DPM 2012 SP1 Agent Coordinator
C:\Windows\Microsoft Data Protection Manager\DPM\ProtectionAgents\AC\4.1.3313.0\dpmac.exe
Any
Any
DPM 2012 R2 Agent Coordinator
C:\Windows\Microsoft Data Protection Manager\DPM\ProtectionAgents\AC\4.2.1205.0\dpmac.exe
Any
Any
DPM 2012 AM Service Host (New Install
%ProgramFiles%\Microsoft System Center 2012\DPM\DPM\bin\AMSvcHost.exe
Any
Any
DPM 2012 AM Service Host (Upgrade Install)
%ProgramFiles%\Microsoft DPM\DPM\bin\AMSvcHost.exe
Any
Any
DPM 2012 DPM AM Service (New Install)
%ProgramFiles%\Microsoft System Center 2012\DPM\DPM\bin\DPMAMService.exe
Any
Any
DPM 2012 DPM AM Service (Upgrade Install)
%ProgramFiles%\Microsoft DPM\DPM\bin\DPMAMService.exe
Any
Any
DPM 2012 MSDPM (New Install)
%ProgramFiles%\Microsoft System Center 2012\DPM\DPM\bin\msdpm.exe
Any
Any
DPM 2012 MSDPM (Upgrade Install)
%ProgramFiles%\Microsoft DPM\DPM\bin\msdpm.exe
Any
Any
DPM 2012 DPMRA (New Install)
%ProgramFiles%\Microsoft System Center 2012\DPM\DPM\bin\DPMRA.exe
Any
Any
DPM 2012 DPMRA (Upgrade Install)
%ProgramFiles%\Microsoft DPM\DPM\bin\DPMRA.exe
Any
Any
Questions:
Are any of these rules not needed?
We know the Agent Coordinator rules are needed on protected servers. Are they also needed on the DPM server (including if we use secondary DPM servers)?
The DPM Configuring Firewalls TechNet page says DCOM uses TCP 135 and the RPC Dynamic ports. Does that mean we also need a rule that opens all TCP RPC Dynamic ports for
any program? Or is this not necessary since we have rules for msdpm.exe and dpmra.exe? Reference:
http://technet.microsoft.com/en-us/library/hh757794
What other rules may be missing, if any?
Note that we do not include rules for ports 53 (DNS), 88 (Kerberos), 389 (LDAP), 137-139 & 445 (NetBIOS) because we already open these ports in other group policy objects.
Also, the below forums post says two exceptions for SQL Server are needed on the DPM server to allow the Remote Administrator console to work. Is there any documentation in the DPM TechNet site on these rules?
http://social.technet.microsoft.com/Forums/en-US/aa88fd00-6836-46d3-8a93-edb487109118/dpm-2012-remote-administration?forum=dataprotectionmanager
Thanks,
-Taylorbox

Does anyone have any comments on this post? We would especially appreciate some input from Microsoft reps to help us ensure we're setting up the correct firewall rules.
Thanks,
-Taylorbox

Can I get information regarding the client browser using JSP

can I get information regarding the client browser using JSP. like.. name, screen resolutions, font type, screen width and height of the browser etc.,
if possible then please give me the samples..
thanks,

can I get information regarding the client browser using JSP. like.. name, screen resolutions, font type, screen width and height of the browser etc.,
if possible then please give me the samples..
thanks,

How to list IP address from client on the Server (TCP/IP CLIENT SERVER COMMUNICATION)

Excuse me,
In this project I want to ask how to add list IP from client that connect to server.
I have edited slightly the project.
'SERVER
Imports System.Net
Imports System.Net.Sockets
Imports System.Threading
Imports System.Threading.Tasks
Imports System.Reflection
Public Class ServerForm
Private _Listener As TcpListener
Private _Connections As New List(Of ConnectionInfo)
Private _ConnectionMonitor As Task
Private Sub Button_Checked(sender As System.Object, e As System.EventArgs) Handles StartStopButton.CheckedChanged
If StartStopButton.Checked Then
StartStopButton.Text = "Stop"
StartStopButton.Image = My.Resources.StopServer
_Listener = New TcpListener(IPAddress.Any, CInt(PortTextBox.Text))
_Listener.Start()
Dim monitor As New MonitorInfo(_Listener, _Connections)
ListenForClient(monitor)
_ConnectionMonitor = Task.Factory.StartNew(AddressOf DoMonitorConnections, monitor, TaskContinuationOptions.LongRunning)
Else
StartStopButton.Text = "Start:"
StartStopButton.Image = My.Resources.StartServer
CType(_ConnectionMonitor.AsyncState, MonitorInfo).Cancel = True
_Listener.Stop()
_Listener = Nothing
End If
End Sub
Private Sub PortTextBox_Validating(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles PortTextBox.Validating
Dim deltaPort As Integer
If Not Integer.TryParse(PortTextBox.Text, deltaPort) OrElse deltaPort < 1 OrElse deltaPort > 65535 Then
MessageBox.Show("Port number between 1 and 65535", "Invalid Port Number", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
PortTextBox.SelectAll()
e.Cancel = True
End If
End Sub
Private Sub ListenForClient(monitor As MonitorInfo)
Dim info As New ConnectionInfo(monitor)
_Listener.BeginAcceptTcpClient(AddressOf DoAcceptClient, info)
End Sub
Private Sub DoAcceptClient(result As IAsyncResult)
Dim monitorinfo As MonitorInfo = CType(_ConnectionMonitor.AsyncState, MonitorInfo)
If monitorinfo.Listener IsNot Nothing AndAlso Not monitorinfo.Cancel Then
Dim info As ConnectionInfo = CType(result.AsyncState, ConnectionInfo)
monitorinfo.Connections.Add(info)
info.AcceptClient(result)
ListenForClient(monitorinfo)
info.AwaitData()
Dim doUpdateConnectionCountLabel As New Action(AddressOf UpdateConnectionCountLabel)
Invoke(doUpdateConnectionCountLabel)
End If
End Sub
Private Sub DoMonitorConnections()
Dim doAppendOutput As New Action(Of String)(AddressOf AppendOutput)
Dim doUpdateConnectionCountLabel As New Action(AddressOf UpdateConnectionCountLabel)
Dim monitorInfo As MonitorInfo = CType(_ConnectionMonitor.AsyncState, MonitorInfo)
Me.Invoke(doAppendOutput, "Server Started")
Do
Dim lostCount As Integer = 0
For index As Integer = monitorInfo.Connections.Count - 1 To 0 Step -1
Dim info As ConnectionInfo = monitorInfo.Connections(index)
If info.Client.Connected Then
If info.DataQueue.Count > 0 Then
Dim messageBytes As New List(Of Byte)
While info.DataQueue.Count > 0
Dim value As Byte
If info.DataQueue.TryDequeue(value) Then
messageBytes.Add(value)
End If
End While
Me.Invoke(doAppendOutput, "Message from IP: " + System.Text.Encoding.ASCII.GetString(messageBytes.ToArray))
End If
Else
monitorInfo.Connections.Remove(info)
lostCount += 1
End If
Next
If lostCount > 0 Then
Invoke(doUpdateConnectionCountLabel)
End If
_ConnectionMonitor.Wait(1)
Loop While Not monitorInfo.Cancel
For Each info As ConnectionInfo In monitorInfo.Connections
info.Client.Close()
Next
monitorInfo.Connections.Clear()
Invoke(doUpdateConnectionCountLabel)
Me.Invoke(doAppendOutput, "Server Stoped")
End Sub
Private Sub UpdateConnectionCountLabel()
ConnectionCountLabel.Text = String.Format("{0} Connections", _Connections.Count)
End Sub
Private Sub AppendOutput(message As String)
If RichTextBox1.TextLength > 0 Then
RichTextBox1.AppendText(ControlChars.NewLine)
End If
RichTextBox1.AppendText(message)
RichTextBox1.ScrollToCaret()
End Sub
Private Sub ClearButton_Checked(sender As Object, e As EventArgs) Handles ClearButton.CheckedChanged
If ClearButton.Checked Then
RichTextBox1.Clear()
End If
End Sub
End Class
Public Class MonitorInfo
Private _listener As TcpListener
Public ReadOnly Property Listener As TcpListener
Get
Return _listener
End Get
End Property
Private _connections As List(Of ConnectionInfo)
Public ReadOnly Property Connections As List(Of ConnectionInfo)
Get
Return _connections
End Get
End Property
Public Property Cancel As Boolean
Public Sub New(tcpListener As TcpListener, connectionInfoList As List(Of ConnectionInfo))
_listener = tcpListener
_connections = connectionInfoList
End Sub
End Class
Public Class ConnectionInfo
Private _monitor As MonitorInfo
Public ReadOnly Property Monitor As MonitorInfo
Get
Return _monitor
End Get
End Property
Private _Client As TcpClient
Public ReadOnly Property Client As TcpClient
Get
Return _Client
End Get
End Property
Private _DataQueue As System.Collections.Concurrent.ConcurrentQueue(Of Byte)
Public ReadOnly Property DataQueue As System.Collections.Concurrent.ConcurrentQueue(Of Byte)
Get
Return _DataQueue
End Get
End Property
Private _Stream As NetworkStream
Public ReadOnly Property Stream As NetworkStream
Get
Return _Stream
End Get
End Property
Public Sub New(monitor As MonitorInfo)
_monitor = monitor
_DataQueue = New System.Collections.Concurrent.ConcurrentQueue(Of Byte)
End Sub
Private _LastReadLength As Integer
Public ReadOnly Property LastReadLength As Integer
Get
Return _LastReadLength
End Get
End Property
Private _Buffer(63) As Byte
Public Sub AcceptClient(result As IAsyncResult)
_Client = _monitor.Listener.EndAcceptTcpClient(result)
If _Client IsNot Nothing AndAlso _Client.Connected Then
_Stream = _Client.GetStream
End If
End Sub
Public Sub AwaitData()
_Stream.BeginRead(_Buffer, 0, _Buffer.Length, AddressOf DoReadData, Me)
End Sub
Private Sub DoReadData(result As IAsyncResult)
Dim info As ConnectionInfo = CType(result.AsyncState, ConnectionInfo)
Try
If info.Stream IsNot Nothing AndAlso info.Stream.CanRead Then
info._LastReadLength = info.Stream.EndRead(result)
For Index As Integer = 0 To _LastReadLength - 1
info._DataQueue.Enqueue(info._Buffer(Index))
Next
'info.SendMessage("Data Diterima " & info._LastReadLength & " Bytes")
info.SendMessage("reply form server: " & info._LastReadLength & " Bytes")
For Each otherInfo As ConnectionInfo In info.Monitor.Connections
If Not otherInfo Is info Then
otherInfo.SendMessage(System.Text.Encoding.ASCII.GetString(info._Buffer))
End If
Next
info.AwaitData()
Else
info.Client.Close()
End If
Catch ex As Exception
info._LastReadLength = -1
End Try
End Sub
Private Sub SendMessage(message As String)
If _Stream IsNot Nothing Then
Dim messageData() As Byte = System.Text.Encoding.ASCII.GetBytes(message)
Stream.Write(messageData, 0, messageData.Length)
End If
End Sub
End Class
'CLIENT
Imports System.Net
Imports System.Net.Sockets
Public Class ClientForm
Private _Connection As ConnectionInfo
Private _ServerAddress As IPAddress
Private Sub ClientForm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
ValidateChildren()
End Sub
Private Sub ConnectButton_Checked(sender As Object, e As System.EventArgs) Handles ConnectButton.CheckedChanged
If ConnectButton.Checked Then
If _ServerAddress IsNot Nothing Then
ConnectButton.Text = "Disconnect"
ConnectButton.Image = My.Resources.StopServer
Try
_Connection = New ConnectionInfo(_ServerAddress, CInt(PortTextBox.Text), AddressOf InvokeAppendOutput)
_Connection.AwaitData()
Catch ex As Exception
MessageBox.Show(ex.Message, "Error Connecting to Server", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
ConnectButton.Checked = False
End Try
Else
MessageBox.Show("Invlid IP Server", "Cannt Connect to Server", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
ConnectButton.Checked = False
End If
Else
ConnectButton.Text = "Connect"
ConnectButton.Image = My.Resources.StartServer
If _Connection IsNot Nothing Then _Connection.Close()
_Connection = Nothing
End If
End Sub
Private Sub SendButton_Click(sender As System.Object, e As System.EventArgs) Handles SendButton.Click
If _Connection IsNot Nothing AndAlso _Connection.Client.Connected AndAlso _Connection.Stream IsNot Nothing Then
Dim buffer() As Byte = System.Text.Encoding.ASCII.GetBytes(InputTextBox.Text)
_Connection.Stream.Write(buffer, 0, buffer.Length)
End If
End Sub
Private Sub ServerTextBox_Validating(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles IPTextBox.Validating
_ServerAddress = Nothing
Dim remoteHost As IPHostEntry = Dns.GetHostEntry(IPTextBox.Text)
If remoteHost IsNot Nothing AndAlso remoteHost.AddressList.Length > 0 Then
For Each deltaAddress As IPAddress In remoteHost.AddressList
If deltaAddress.AddressFamily = AddressFamily.InterNetwork Then
_ServerAddress = deltaAddress
Exit For
End If
Next
End If
If _ServerAddress Is Nothing Then
MessageBox.Show("Cannot resolve Server Address", "invalid Server", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
IPTextBox.SelectAll()
e.Cancel = True
End If
End Sub
Private Sub PortTextBox_Validating(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles PortTextBox.Validating
Dim deltaPort As Integer
If Not Integer.TryParse(PortTextBox.Text, deltaPort) OrElse deltaPort < 1 OrElse deltaPort > 65535 Then
MessageBox.Show("Port number between 1 and 65535", "invalid Port number", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
PortTextBox.SelectAll()
e.Cancel = True
End If
End Sub
Private Sub InvokeAppendOutput(message As String)
Dim doAppendOutput As New Action(Of String)(AddressOf AppendOutput)
Me.Invoke(doAppendOutput, message)
End Sub
Private Sub AppendOutput(message As String)
If RichTextBox1.TextLength > 0 Then
RichTextBox1.AppendText(ControlChars.NewLine)
End If
RichTextBox1.AppendText(message)
RichTextBox1.ScrollToCaret()
End Sub
Private Sub ButtonClear_Click(sender As Object, e As EventArgs) Handles ButtonClear.Click
RichTextBox1.Clear()
InputTextBox.Clear()
End Sub
End Class
Public Class ConnectionInfo
Private _AppendMethod As Action(Of String)
Public ReadOnly Property AppendMethod As Action(Of String)
Get
Return _AppendMethod
End Get
End Property
Private _Client As TcpClient
Public ReadOnly Property Client As TcpClient
Get
Return _Client
End Get
End Property
Private _Stream As NetworkStream
Public ReadOnly Property Stream As NetworkStream
Get
Return _Stream
End Get
End Property
Private _LastReadLength As Integer
Public ReadOnly Property LastReadLength As Integer
Get
Return _LastReadLength
End Get
End Property
Private _Buffer(63) As Byte
Public Sub New(address As IPAddress, port As Integer, append As Action(Of String))
_AppendMethod = append
_Client = New TcpClient
_Client.Connect(address, port)
_Stream = _Client.GetStream
End Sub
Public Sub AwaitData()
_Stream.BeginRead(_Buffer, 0, _Buffer.Length, AddressOf DoreadData, Me)
End Sub
Public Sub Close()
If _Client IsNot Nothing Then _Client.Close()
_Client = Nothing
_Stream = Nothing
End Sub
Private Sub DoreadData(result As IAsyncResult)
Dim info As ConnectionInfo = CType(result.AsyncState, ConnectionInfo)
Try
If info._Stream IsNot Nothing AndAlso info._Stream.CanRead Then
info._LastReadLength = info._Stream.EndRead(result)
If info._LastReadLength > 0 Then
Dim message As String = System.Text.Encoding.ASCII.GetString(info._Buffer)
info._AppendMethod(message)
End If
info.AwaitData()
End If
Catch ex As Exception
info._LastReadLength = -1
info._AppendMethod(ex.Message)
End Try
End Sub
End Class
//ScreenShot server
http://prntscr[dot]com/5t1ol3
//Screenshot client
http://prntscr[dot]com/5t1odj
source: code[dot]msdn[dot]microsoft[dot]com/windowsdesktop/Simple-Multi-User-TCPIP-43cc3b44

I have a similar chat application. When the user attempts to connect, instead of sending a simple string, the client sends a serialized object(xml string) with all relevant login and session information, this includes the user's IP address. Once the server
receives said information, depending on the type of TCP broadcast (a custom enumerated type) information from one user may be passed to a single user, or distributed to many users.
If it helps, here is the TCPBroadcast object I use. But in order for your server to understand it, you kind of have to build your server and client somewhat around it.
Option Strict On
Option Explicit On
Option Infer Off
Namespace TCPChat
Public Class TCPBroadcast
Public Property Message As String
Public Property BroadCastTime As DateTime
Public Property DestUser As String
Public Property OriginUser As String
Public Property PasswordHash As String
Public Property BroadcastSourceIP As String
Public Property BroadCastType As TCPBroadcastType
Public Property LoginUserName As String
Public Property FailureReason As String
Public Function XmlEncoding() As String
Dim serializer As New Xml.Serialization.XmlSerializer(GetType(TCPBroadcast))
Dim XML As String = String.Empty
Using memStream As New IO.MemoryStream
Using xmlWriter As New Xml.XmlTextWriter(memStream, System.Text.Encoding.UTF8) With _
{.Indentation = 4, .Formatting = System.Xml.Formatting.Indented}
serializer.Serialize(xmlWriter, Me)
End Using
XML = System.Text.Encoding.UTF8.GetString(memStream.ToArray)
End Using
Return XML
End Function
Public Function ToBinary() As Byte()
Return System.Text.Encoding.UTF8.GetBytes(Me.XmlEncoding)
End Function
Public Shared Function FromBinary(binary As Byte()) As DeserializationResult
Dim xml As String = System.Text.Encoding.UTF8.GetString(binary)
Return FromXML(xml)
End Function
Public Shared Function FromXML(xml As String) As DeserializationResult
Dim DeserializationResult As New DeserializationResult
DeserializationResult.Error = False
Try
Dim deserializer As New Xml.Serialization.XmlSerializer(GetType(TCPBroadcast))
Dim buffer As Byte() = System.Text.Encoding.UTF8.GetBytes(xml)
Using memStream As New IO.MemoryStream(buffer)
DeserializationResult.tcpBroadCast = CType(deserializer.Deserialize(memStream), TCPBroadcast)
End Using
Catch ex As Exception
DeserializationResult.Error = True
DeserializationResult.ErrorMessage = ex.ToString
DeserializationResult.AttemptedXML = xml
End Try
Return DeserializationResult
End Function
Public Class DeserializationResult
Public [Error] As Boolean
Public ErrorMessage As String
Public tcpBroadCast As TCPBroadcast
Public AttemptedXML As String
Sub New()
End Sub
End Class
Public Enum TCPBroadcastType
AdministrativeMessage
AuthenticationFailure
AuthenticationSuccess
ChatBroadcast
CredentialsRequest
Credentials
DisconnectedByServer
KeepAlive
PrivateMessage
ServerMessage
SystemMessage
UnableToProcessRequest
End Enum
End Class
End Namespace
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Help with Client/Server communication

Im working on a project for university, and one aspect of it is downloading files from a remote computer.
The majority of my project so far has been using RMI only, for browsing the remote computer, deleting files, renaming files, creating new directories and searching for files. All of this is done via a GUI client, with a server running on the server machine.
Ive now reached the part where I'll need to implement the downloading of files. I want the user to select a file from within the GUI and click download, and get it off the server.
I dont need any help with event handlers or getting the contents of the remote computer or anything of that sort.
Consider when I have the name of the file that I want to download from the client.
Im having trouble understanding how exactly its going to work. Ive seen examples of file transfer programs where the user types in the name of the file in the command line which they want to download. But my implementation will differ.
Every time the user clicks the button, I have to send to the server the name of a different file which will need to be downloaded.
I imagine in the event handler for the Download button I'll be creating a new socket and Streams for the download of the file that the user wants. But how am I to send to the client a dynamic file name each time when the user tries to download a different file?
I am a bit new at this, and Ive been searching on the forums for examples and Ive run through them, but I think my situation is a bit different.
Also, will RMI play any part in this? Or will it purely be just Socket and Streams?
I'll also develop an Upload button, but I imagine once I get the Download one going, the Upload one should be much harder.
Any ideas and help would be appreciated.

Hi
I'm no RMI expert... and I did not understand your question very well....
I think you should do this procedure:
you should send a request for the file from the client to the server . then a new connection between the two machines should be made which will be used to send the file.
by using UDP you will achive it quite nicely...
//socket - is your TCP socket you already use on the client...
//out - socket's output stream
byte [] b=new String("File HelloWorld.java").getBytes();
// you should use a different way for using this rather than using strings...
out.write(b);
DatagramSocket DS=new DatagramSocket(port);
DS.recieve(packet); //the data is written into the packet...on the server side you should...
//socket - is your TCP socket you already use on the server...
//in - socket's input stream
byte [] b=new byte[256];
out.read(b);
/*Here you check what file you need to send to the client*/
DatagramSocket DS=new DatagramSocket(server_port);
byte [] data=//you should read the file and translate it into bytes and build a packet with them
DS.send(packet); //the data is in the packet...This way the server sends the required file to the client .....
I hope it will help, otherwise try being clearier so I could help you...
SIJP

Help needed Regarding Project Server - 2013 Workflow

Hi All,
I am new to Project server 2013 Workflow, hence please help me regarding this. Pardon me if this question is too trivial.
I have created a project type associated with a workflow and my workflow is as follows :
So I am not doing anything here, I am just testing the workflow as mentioned by technet site : http://technet.microsoft.com/en-us/library/dn458865(v=office.15).aspx
But it is mentioned that, after a minute or 2, the workflow state will change, also they have mentioned to press the Submit button.
But in my case, the workflow is not moving to next stage [It just says 'The workflow is still processing - which never changes after hours] or I am getting the submit button (Submit button is disabled on the ribbon). Below is the state of my workflow :
PS : I have made the user added to Portfolio managers group as well. But still I am having this same issue.
The Workflow manager is installed properly, and it is working fine in case of List workflow. I am facing the issue only wrt Site workflow for Project server 2013.
Please help me to solve this issue.
Thanks,
shanky

Hi Kiran,
I am now facing issue while assigning a task to a person in the workflow.
I am having a person named say 'John' , who is included in Project Manager as well as Portfolio Manager.
And I am using a workflow as :
Stage : Conceptual
Assign a task to John (Task outcome to Variable: Outcome5 | Task ID to Variable: TaskID3 )
Transition to stage
Go to Approval
But this is again giving issue as :
Workflow Internal status : Cancelled
Details: System.ApplicationException: HTTP 401 {"error":{"code":"-2147024891, System.UnauthorizedAccessException","message":{"lang":"en-US","value":"Access denied. You do not have
permission to perform this action or access this resource."}}}
PS : I have used the same Sharepoint admin account for 'Account Name' in ‘User Profile Sync' , Is this causing the issue? Please let me know.
Thanks,
Shanky

Help needed regarding the client server communication

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