Example - 1

The following Java example is a simple stateless Enterprise JavaBean that retrieves stock symbols and stock values. The Enterprise JavaBean creates a socket and listens for and accepts connections from clients on the socket.

serverSocket = new ServerSocket(Constants.SOCKET_PORT);
clientSocket = serverSocket.accept();try {} catch (IOException ex) {...}try {} catch (IOException e) {...}
ServerSocket serverSocket = null;Socket clientSocket = null;public StockSymbolBean() {}public String getStockSymbol(String name) {...}public BigDecimal getStockValue(String symbol) {...}private void processClientInputFromSocket() {...}@Statelesspublic class StockSymbolBean implements StockSymbolRemote {}

And the following Java example is similar to the previous example but demonstrates the use of multicast socket connections within an Enterprise JavaBean.

serverSocket = new ServerSocket(Constants.SOCKET_PORT);
start();try {} catch (IOException ex) {...}listening = true;while(listening) {}
clientSocket = serverSocket.accept();
try {} catch (IOException e) {...}...
ServerSocket serverSocket = null;Socket clientSocket = null;boolean listening = false;public StockSymbolBean() {}public String getStockSymbol(String name) {...}public BigDecimal getStockValue(String symbol) {...}public void run() {}@Statelesspublic class StockSymbolBean extends Thread implements StockSymbolRemote {}

The previous two examples within any type of Enterprise JavaBean violate the EJB specification by attempting to listen on a socket, accepting connections on a socket, or using a socket for multicast.