Connect CRM multiple clients to ECC

Hi SAP Gurus,
I have one Question regarding CRM->ECC connectivity.
Will it be possible to connect multiple clients of CRM to ECC ? Like more than one client can talk to ECC ?
Because in BW we can not connect multiple clients to source system ! does this true with CRM also or not ?
Thank you

1) As datasources are client independent so do we need to activate the datasources (like 2lis*) in all clients one by one? or just activating in one client will make it ?
You need to activate the datasources individually for all the client. If you will activate in one client, it will be specific to that only
) If we replicate the datasources for new clients in BW side and then want to reload the data from New clients (set-up tables filling and INIT)?would it have an affect on existing deltas (for datasources 2lis*)for existing Source client 100? What shud be the precautions? How we can proceed?Please let us know your opinons plz
If you will replicate in one client system, it wont affect delta and init from other client.
One thing you can do, to identify data from different source systems, you can use source system compounding in your infoobjects. Make sure you are not loading data from both the client at the same time. it may lock the DSO and master data.

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Message was edited by: Satyajit Chakraborty

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I've seen in various places that it is recommended to only have one client in a CRM system. I have worked at many sites that have several CRM clients in a system without issues.
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Tim,
Unless you are going to have multiple back ends or some business scenario that requires multiple clients in CRM Production, then don't do it in CRM Dev/QA.
The reason why don't do multiple clients in a CRM system that is connected to an ERP backend is the following:
CRM configuration is dependent on downloaded configuration from the ERP system.
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Hi!
I understand that it is possible that multiple clients listen to one server (on the same port) and even write to it (then it should be a multi-threaded server).
But i would like to refuse connectios, if one client is connected. How can I do that?
In my case I have a (single threaded) server. Now one clients connects. The server waits to receive data from the client and answers, without ever closing the port. that works.
Now if I connect with a second client, the openicng of the socket in the second client works fine, although the server does not seem to notice the second client. Communication is not possible between the server and the second client, and the server doesn't answer to the first client anymore, although he receives data from it.
So, since the server does not seem to notice the second client (does not accept the connection) and I don't get an exception at the second client, what can I do?
Thank you for your help!
concerned Code (if you want to take a look at it):
CLIENT:
socket = new Socket(hostname, echo_port);
SERVER:
try
ServerSocket waitingsocket = new ServerSocket(echo_port);
try
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catch (Exception e)
READER:
public void run()
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Just to make sure this is clear: You can NOT have multiple clients on a given socket connection. You CAN have multiple clients connected to a particular port on a given server, but each client will be communicating with the server through a different of socket.
The usual approach here is to set up a listening ServerSocket on the desired port, call accept() on it, then process the communication from the returned Socket object. This is usually done by spawning a new thread and allowing it to handle the socket communication, while the ServerSocket loops around to another accept() for the next communication.
Here's an excellent intro to the concepts (the code is really ugly and poorly implemented, but it does a good job of explaining the overall concept). I used this as a starting point, and now (after a whole lot of development) have a pretty sweet extensible web server class that handles template expansion, etc... (I use this as a quick and dirty UI for some of my apps, instead of requiring the user to install a JSP container):
http://developer.java.sun.com/developer/technicalArticles/Networking/Webserver/
- K

How can I connect multiple clients to a single client ?

I am currently developing an instant messaging program.I created a server and connected multiple clients to it by using thread logic.However I do not know how to connect multiple client to a single client.
What shall I do for that?Does anybody know a good tutorial or sample program?Or shall anybody explain me what I shall do for building the Instant Messaging part of my chat program?
Thank u in advance.

You may use UDP multicast socket. But since you are using the UDP protocol you might risk losing the data that you send since UDP does not guarantee the safe transfer of data.
Alternately, you might create a server that allows multiple client to connect to it whose connection Socket objects are then stored in a Vector <Socket> object. The server then sends back data to the connected client about the other clients connected to it. Now when the client wants to send data (like an IM) to another connected client, it has to send a request to the server specifying the client login name and the server in turn streams that particular client's Address and Port to the requesting client. The requesting client then initiates the connection with the other client and then starts a conversation. One more thing, when the client communicates it needs to send information to the server like the name by which it likes to be referenced. In this scenario the server acts like a central repository for clients to query the existence of other clients in the chat room. Each client here runs a thread that listens to incoming connections and when a connection is established, may be opens a IM window or something.
The third option is to make the server to relay the information from one client to another. Like say, I'm connected to whoopy server and i want to send "Hello" to jackson, then i send the message (ie, Hello) along with the name of the client to which i wish to send it to (ie, jackson). The server then performs a lookup in its Vector <Socket> object and then initiates a connection with jackson and sends the information. However, this method is pretty costly in that you will be wasting a lot of processing behind the server.
--Subhankar
P.s. If you stumble upon any other brilliant ideas let me know.

Connect CRM multiple clients to ECC

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