javax.mail
Class Transport

java.lang.Object
  javax.mail.Service
      javax.mail.Transport

public abstract class Transport
extends Service

An abstract class that models a message transport. Subclasses provide actual implementations.

Note that Transport extends the Service class, which provides many common methods for naming transports, connecting to transports, and listening to connection events.

Author:

John Mani, Max Spivak, Bill Shannon

See Also:

Service, ConnectionEvent, TransportEvent

Field Summary

Fields inherited from class javax.mail.Service

debug, session, url

Constructor Summary

Transport(Session session, URLName urlname)
Constructor.

Method Summary

void	addTransportListener(TransportListener l) Add a listener for Transport events.
protected void	notifyTransportListeners(int type, Address[] validSent, Address[] validUnsent, Address[] invalid, Message msg) Notify all TransportListeners.
void	removeTransportListener(TransportListener l) Remove a listener for Transport events.
static void	send(Message msg) Send a message.
static void	send(Message msg, Address[] addresses) Send the message to the specified addresses, ignoring any recipients specified in the message itself.
abstract void	sendMessage(Message msg, Address[] addresses) Send the Message to the specified list of addresses.

Methods inherited from class javax.mail.Service

addConnectionListener, close, connect, connect, connect, connect, finalize, getURLName, isConnected, notifyConnectionListeners, protocolConnect, queueEvent, removeConnectionListener, setConnected, setURLName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Transport

public Transport(Session session,
                 URLName urlname)

Constructor.

Parameters:

session - Session object for this Transport.

urlname - URLName object to be used for this Transport

Method Detail

send

public static void send(Message msg)
                 throws MessagingException

Send a message. The message will be sent to all recipient addresses specified in the message (as returned from the Message method getAllRecipients), using message transports appropriate to each address. The send method calls the saveChanges method on the message before sending it.

If any of the recipient addresses is detected to be invalid by the Transport during message submission, a SendFailedException is thrown. Clients can get more detail about the failure by examining the exception. Whether or not the message is still sent successfully to any valid addresses depends on the Transport implementation. See SendFailedException for more details. Note also that success does not imply that the message was delivered to the ultimate recipient, as failures may occur in later stages of delivery. Once a Transport accepts a message for delivery to a recipient, failures that occur later should be reported to the user via another mechanism, such as returning the undeliverable message.

In typical usage, a SendFailedException reflects an error detected by the server. The details of the SendFailedException will usually contain the error message from the server (such as an SMTP error message). An address may be detected as invalid for a variety of reasons - the address may not exist, the address may have invalid syntax, the address may have exceeded its quota, etc.

Note that send is a static method that creates and manages its own connection. Any connection associated with any Transport instance used to invoke this method is ignored and not used. This method should only be invoked using the form Transport.send(msg);, and should never be invoked using an instance variable.

Parameters:

msg - the message to send

Throws:

SendFailedException - if the message could not be sent to some or any of the recipients.

MessagingException

See Also:

Message#saveChanges, Message#getAllRecipients, send(Message, Address[]), SendFailedException

send

public static void send(Message msg,
                        Address[] addresses)
                 throws MessagingException

Send the message to the specified addresses, ignoring any recipients specified in the message itself. The send method calls the saveChanges method on the message before sending it.

Parameters:

msg - the message to send

addresses - the addresses to which to send the message

Throws:

SendFailedException - if the message could not be sent to some or any of the recipients.

MessagingException

See Also:

Message#saveChanges, send(Message), SendFailedException

sendMessage

public abstract void sendMessage(Message msg,
                                 Address[] addresses)
                          throws MessagingException

Send the Message to the specified list of addresses. An appropriate TransportEvent indicating the delivery status is delivered to any TransportListener registered on this Transport. Also, if any of the addresses is invalid, a SendFailedException is thrown. Whether or not the message is still sent succesfully to any valid addresses depends on the Transport implementation.

Unlike the static send method, the sendMessage method does not call the saveChanges method on the message; the caller should do so.

Parameters:

msg - The Message to be sent

addresses - array of addresses to send this message to

Throws:

SendFailedException - if the send failed because of invalid addresses.

MessagingException - if the connection is dead or not in the connected state

See Also:

TransportEvent

addTransportListener

public void addTransportListener(TransportListener l)

Add a listener for Transport events.

The default implementation provided here adds this listener to an internal list of TransportListeners.

Parameters:

l - the Listener for Transport events

See Also:

TransportEvent

removeTransportListener

public void removeTransportListener(TransportListener l)

Remove a listener for Transport events.

The default implementation provided here removes this listener from the internal list of TransportListeners.

Parameters:

l - the listener

See Also:

addTransportListener(javax.mail.event.TransportListener)

notifyTransportListeners

protected void notifyTransportListeners(int type,
                                        Address[] validSent,
                                        Address[] validUnsent,
                                        Address[] invalid,
                                        Message msg)

Notify all TransportListeners. Transport implementations are expected to use this method to broadcast TransportEvents.

The provided default implementation queues the event into an internal event queue. An event dispatcher thread dequeues events from the queue and dispatches them to the registered TransportListeners. Note that the event dispatching occurs in a separate thread, thus avoiding potential deadlock problems.