ca.uhn.hl7v2.protocol.impl.SocketStreamSource Maven / Gradle / Ivy
/*
* Created on 15-Apr-2004
*/
package ca.uhn.hl7v2.protocol.impl;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import ca.uhn.hl7v2.protocol.StreamSource;
import ca.uhn.hl7v2.protocol.TransportException;
/**
* A base implementation of StreamSource based on sockets.
*
* @author Bryan Tripp
* @version $Revision: 1.1 $ updated on $Date: 2007-02-19 02:24:26 $ by $Author: jamesagnew $
*/
public abstract class SocketStreamSource implements StreamSource {
/**
* @return a socket from which input and output streams for message exchages
* are to be obtained
*/
public abstract Socket getSocket();
/**
* Gets fresh instance of socket, which is subsequently available
* from getSocket().
*/
public abstract void connect() throws TransportException;
/**
* Closes streams and underlying socket.
* @see ca.uhn.hl7v2.protocol.StreamSource#disconnect()
*/
public void disconnect() throws TransportException {
try {
if (isConnected()) {
getOutboundStream().close();
getInboundStream().close();
getSocket().close();
}
} catch (IOException e) {
throw new TransportException(e);
}
}
/**
* @return the stream to which we write outbound messages.
*/
public OutputStream getOutboundStream() throws TransportException {
checkConnected();
try {
return getSocket().getOutputStream();
} catch (IOException e) {
throw new TransportException(e);
}
}
private void checkConnected() throws TransportException {
if (!isConnected()) {
throw new TransportException("The socket is not connected");
}
}
private boolean isConnected() {
boolean is = false;
if (getSocket() != null && getSocket().isConnected() && !getSocket().isClosed()) {
is = true;
}
return is;
}
/**
* @return the stream to which we expect the remote server to send messages.
*/
public InputStream getInboundStream() throws TransportException {
checkConnected();
try {
return getSocket().getInputStream();
} catch (IOException e) {
throw new TransportException(e);
}
}
}