com.sun.squawk.io.mailboxes
Class Channel

java.lang.Object
  com.sun.squawk.io.mailboxes.Channel

public class Channel
extends Object

A Channel is a private bidirectional link between two MailBoxes. The Channel is a wrapper over the local mailbox and the mailboxaddress of the remote mailbox. A Channel can be used to talk to any kind of registered Mailbox, including those created by ServerChannels, and those created by the raw Mailbox API.

Method Summary

void	close() Closes the Channel at both ends asynchronously.
boolean	isOpen() Return true if the channel is open, both from here to the remote mailbox, and from the remote mailbox back.
static Channel	lookup(String mailboxName) Create a private MailBox, and connect to the named MailBox.
Envelope	receive() Wait for an envlope sent to this channel.
void	send(Envelope env) Sends a message to the remote Mailbox.

Methods inherited from class java.lang.Object

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

Method Detail

lookup

public static Channel lookup(String mailboxName)
                      throws NoSuchMailboxException

Create a private MailBox, and connect to the named MailBox. Note that the server side may or may not create a private mailbox to handle its side of the communication.

Throws:

NoSuchMailboxException

send

public void send(Envelope env)
          throws AddressClosedException

Sends a message to the remote Mailbox. Does not wait for acknowledgment. The Channel must not be closed or an IllegateStateException will be thrown.

Parameters:

env - the message to send

Throws:

IllegateStateException - if the address is not in the open state.

AddressClosedException

receive

public Envelope receive()
                 throws AddressClosedException,
                        MailboxClosedException

Wait for an envlope sent to this channel. Blocks waiting for messages. If the logical connection to this Mailbox is closed, an AddressClosedException will be thrown.

Returns:

an Envelope containing the sent message.

Throws:

AddressClosedException - if the connection to this mailbox is closed.

MailboxClosedException - if the Channel itself is closed.

close

public void close()

Closes the Channel at both ends asynchronously.

isOpen

public boolean isOpen()

Return true if the channel is open, both from here to the remote mailbox, and from the remote mailbox back.

Returns:

true if open.