NonStop Server for Java 7.0 Programmer's Reference

Figure 3 Client server application with TCP/IP and JI as communication channels

Application

Client Application

TCP

java.net.Socket/

java.nio.socketChannel

Application

Client Application

java.net.Socket/

java.nio.socketChannel

TCP

Server Application

Application

java.net.Socket/

java.nio.socketChannel

Server Application

Application

java.net.Socket/

java.nio.socketChannel

Pathsend / FS API

Without JI library With JI library

Sample code snippet in Table 10 (page 72) illustrates a simple client application that connects to

a server, sends data and in turn receives response. On the server side, the server code listens for

a connection and when the connection is established, it waits for the data and then responds back.

The sample code snippet and the subsequent sections help you to understand the functionality

illustrated in Figure 1 (page 17).

Table 10 Sample code snippet

Sample server codeSample client code

......

ServerSocket ssock = new (2) Socket sock = new

ServerSocket(8070);Socket(“nonstop.server.com”,8070);

............

(1) Socket sock = ssock.accept();OutputStream os = sock.getOutputStream();

......InputStream is = sock.getInputStream();

InputStream is = sock.getInputStream();......

(4) is.read();(3) os.write();

............

OutputStream os = sock.getOutputStream();(6) is.read();

(5) os.write();

......

sock.close();

......

The following table describes the behavior of the relevant calls when JI is enabled. For more

information on enabling JI, see “Enabling JI” (page 75). The server is configured to run as a TS/MP

72 Java infrastructure