Package ca.uhn.hl7v2.protocol.impl

Class AbstractTransport

java.lang.Object

ca.uhn.hl7v2.protocol.impl.AbstractTransport

All Implemented Interfaces:

TransportLayer

Direct Known Subclasses:

AbstractJMSTransport, JMSTransport, MLLPTransport, URLTransport

public abstract class AbstractTransport
extends Object
implements TransportLayer

A base implementation of TransportLayer which looks after the addition of common metadata to each inbound Transportable.

Version:

$Revision: 1.1 $ updated on $Date: 2007-02-19 02:24:26 $ by $Author: jamesagnew $

Author:

Bryan Tripp

Constructor Summary

Constructors

Constructor	Description
AbstractTransport()

Method Summary

Modifier and Type	Method	Description
void	connect()	Sets isConnected() to false, then calls doConnect(), then sets isConnected() to true.
void	disconnect()	Drops any existing connection to the remote server.
abstract void	doConnect()	Performs connection as described in TransportLayer.connect().
abstract void	doDisconnect()	Performs disconnection as described in TransportLayer.disconnect().
abstract Transportable	doReceive()	Called by receive(), which then adds common metadata.
abstract void	doSend(Transportable theMessage)	The method send() delegates to this method after checking whether we are connected.
Map<String,Object>	getCommonMetadata()
boolean	isConnected()
Transportable	receive()	Delegates to doReceive() and adds common metadata to the resulting Transportable before it is returned.
void	send(Transportable theMessage)	Delegates to doSend() after checking that we are connected.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AbstractTransport

public AbstractTransport()

Method Details

getCommonMetadata

public Map<String,Object> getCommonMetadata()

Specified by:

getCommonMetadata in interface TransportLayer

Returns:

metadata to be added to the metadata of all incoming messages. This provides a way of associating connection information with incoming messages (eg the IP address of the remote server).

See Also:

• TransportLayer.getCommonMetadata()

receive

public Transportable receive()
                      throws TransportException

Delegates to doReceive() and adds common metadata to the resulting Transportable before it is returned.

Specified by:

receive in interface TransportLayer

Returns:

the next available message

Throws:

TransportException

doReceive

public abstract Transportable doReceive()
                                 throws TransportException

Called by receive(), which then adds common metadata.

Returns:

Transportable the next available message

Throws:

TransportException

send

public void send(Transportable theMessage)
          throws TransportException

Delegates to doSend() after checking that we are connected.

Specified by:

send in interface TransportLayer

Parameters:

theMessage - the message to send

Throws:

TransportException

See Also:

• TransportLayer.send(Transportable)

doSend

public abstract void doSend(Transportable theMessage)
                     throws TransportException

The method send() delegates to this method after checking whether we are connected.

Parameters:

theMessage -

Throws:

TransportException

connect

public void connect()
             throws TransportException

Sets isConnected() to false, then calls doConnect(), then sets isConnected() to true.

Specified by:

connect in interface TransportLayer

Throws:

TransportException

See Also:

• TransportLayer.connect()

doConnect

public abstract void doConnect()
                        throws TransportException

Performs connection as described in TransportLayer.connect(). The connect() method of this class delegates to doConnect() after some internal housekeeping.

Throws:

TransportException

isConnected

public boolean isConnected()

Specified by:

isConnected in interface TransportLayer

Returns:

true if connect() has completed successfully. Note that true may be returned even if a connection is dead (ie the implementation need not test a connection during this call) but should return false if connect() has not been called, or if connect() has been called and is pending.

See Also:

• TransportLayer.isConnected()

disconnect

public void disconnect()
                throws TransportException

Description copied from interface: TransportLayer

Drops any existing connection to the remote server.

Specified by:

disconnect in interface TransportLayer

Throws:

TransportException

See Also:

• TransportLayer.disconnect()

doDisconnect

public abstract void doDisconnect()
                           throws TransportException

Performs disconnection as described in TransportLayer.disconnect(). The disconnect() method of this class delegates to doDisconnect() after some internal housekeeping.

Throws:

TransportException