Hi:

I am trying to develop a client socket connection inside an EJB (I have some reasons for using sockets instead of a clean java solution).

Shown below, is the simple code I am using to connect to a socket server. The code is tested outside EJB framework and works fine.

But when I use it inside EJB framework, the connection to the socket server is made by the EJB [m_clientSocket = new Socket(address, port);] without any problem.

But when I write something to the stream, nothing is sent to the socket server, until the stream or the client socket is closed. This is a problem because I am unable to read the reply from the socket server, since the socket needs to be closed for the data to the flushed to the server.

1. I tried fushing the stream without any result.
2. When I close the output stream, the client socket itself is being closed.

Anybody successfully worked on a socket client inside an EJB, please help.

Thanks,

JKN

..................
Socket m_clientSocket;
DataOutputStream m_outToServer;
BufferedReader m_inFromServer;
....................
m_clientSocket = new Socket(address, port);
m_outToServer = new DataOutputStream(m_clientSocket.getOutputStream());
m_inFromServer = new BufferedReader(new InputStreamReader(m_clientSocket.getInputStream()));
m_outToServer.writeBytes("Message to Socket server");
m_outToServer.flush();
//m_outToServer.close();
m_inFromServer = new BufferedReader(new InputStreamReader(m_clientSocket.getInputStream()));
String reply = this.m_inFromServer.readLine();

I also had a bad experience trying to make socket connection from an ejb. In my case, I was trying to make a SOAP call. The call simply hung the whole container.
It's probably not a good idea to make this kind of system calls from inside the ejb container. I switched to making the call from the servlet engine and everything works fine.

Pranab

EJB spec clearly says sockets should not be used in EJB's.

I wonder why EJB compilers does not flash an error when developer makes mistake of using sockets.

Hi,

Sorry about the wrong information. EJB spec says that enterprise bean must not attempt to listen on a socket.

But it can open a socket and use it just like JDBC.

Sockets has to be closed when the ejb is passivated. Socket connection has to be established when the ejb is activated.

do you known where I can find info about EJB sockets ? I want to my clients connect to me by EJB-socket ... may that not possible.