com.ibm.aglet
Interface MessageManager

public interface MessageManager

The MessageManager controls concurrency of incomming message. Each kind of message can have a priority and will be placed in the message queue in accordance with its priority.

Version:

1.30 $Date: 2001/07/28 06:33:58 $

Author:

Mitsuru Oshima

See Also:

FutureReply, ReplySet

Field Summary

static int	ACTIVATE_AGLET Used as a logical OR in the priority.
static int	MAX_PRIORITY The maximum priority that the message can have.
static int	MIN_PRIORITY The minimal priority that the message can have.
static int	NORM_PRIORITY The default priority that is assigned to a message.
static int	NOT_QUEUED Used as a argugment to the setPriority.

Method Summary

void	destroy() Destorys the manager.
void	exitMonitor() Exits the current monitor.
void	notifyAllMessages() Notifies all of waiting threads.
void	notifyMessage() Notifies a single waiting thread.
void	setPriority(java.lang.String kind, int priority) Sets the message's priority.
void	waitMessage() Waits until it is notified.
void	waitMessage(long timeout) Waits until it is notified or the timeout expires.

Field Detail

NOT_QUEUED

public static final int NOT_QUEUED

Used as a argugment to the setPriority. It indicates that messages which have the same kind will not be queued in the message queue and processed immediately.

See Also:

setPriority(java.lang.String, int)

ACTIVATE_AGLET

public static final int ACTIVATE_AGLET

Used as a logical OR in the priority. It indicates that receiving this kind of messages will automatically activate the aglet if it had been deactivated.

 getMessageManager().setPriority("wakeMeUp",
 NORM_PRIORITY | ACTIVATE_AGLET);
 

See Also:

setPriority(java.lang.String, int)

MIN_PRIORITY

public static final int MIN_PRIORITY

The minimal priority that the message can have.

See Also:

setPriority(java.lang.String, int)

NORM_PRIORITY

public static final int NORM_PRIORITY

The default priority that is assigned to a message.

See Also:

setPriority(java.lang.String, int)

MAX_PRIORITY

public static final int MAX_PRIORITY

The maximum priority that the message can have.

See Also:

setPriority(java.lang.String, int)

Method Detail

destroy

public void destroy()

Destorys the manager. After this calling, the message manager is no longer valid and all queued and incoming message will be denied.

exitMonitor

public void exitMonitor()

Exits the current monitor.

See Also:

Aglet.exitMonitor(), waitMessage, notifyMessage, notifyAllMessages

notifyAllMessages

public void notifyAllMessages()

Notifies all of waiting threads.

Throws:

IllegalMonitorStateException - If the current thread is not the owner of the monitor.

See Also:

Aglet.notifyAllMessages(), waitMessage, notifyMessage

notifyMessage

public void notifyMessage()

Notifies a single waiting thread.

Throws:

IllegalMonitorStateException - If the current thread is not the owner of the monitor.

See Also:

Aglet.notifyMessage(), waitMessage, notifyAllMessages

setPriority

public void setPriority(java.lang.String kind,
                        int priority)

Sets the message's priority.

Parameters:

kind - the kind to set a priority

priority - the priority

waitMessage

public void waitMessage()

Waits until it is notified.

Throws:

IllegalMonitorStateException - If the current thread is not the owner of the monitor.

See Also:

notifyMessage, notifyAllMessages

waitMessage

public void waitMessage(long timeout)

Waits until it is notified or the timeout expires.

Parameters:

timeout - the maximum time to wait in milliseconds.

Throws:

IllegalMonitorStateException - If the current thread is not the owner of the monitor.

See Also:

Aglet.waitMessage(), notifyMessage, notifyAllMessages