rice.rm.messaging
Class RMRequestKeysMsg

java.lang.Object
  rice.pastry.messaging.Message
      rice.rm.messaging.RMMessage
          rice.rm.messaging.RMRequestKeysMsg

All Implemented Interfaces:

java.io.Serializable

public class RMRequestKeysMsg

extends RMMessage

implements java.io.Serializable

See Also:

Serialized Form

Nested Class Summary

static class

RMRequestKeysMsg.WrappedMsg Contains the RMRequestKeysMsg and the destination to which it was being sent.

Nested classes inherited from class rice.rm.messaging.RMMessage

RMMessage.KEEntry

Field Summary

static int	MAXATTEMPTS The maximum number of attempts made in the timeout mechanism after which the message is ignored.
static int	TIMEOUT The timeout period within which if the response to this message is not received, then the same message is resent.

Fields inherited from class rice.rm.messaging.RMMessage

_seqno, _source

Constructor Summary

RMRequestKeysMsg(NodeHandle source, Address address, Credentials authorCred, int seqno, java.util.Vector _rangeSet, int _eventId)
Constructor : Builds a new RM Message

Method Summary

int	getAttempt()
int	getEventId()
void	handleDeliverMessage(RMImpl rm) The handling of the message iterates of the 'rangeSet' as takes the following action on the entries of type RMMessage.KEEntry.
void	incrAttempt() Since this message has a timeout mechanism, the next time we resend the message as a result of Timeout we need to increment the attempt number.
void	setSeqNo(int val) Since this message has a timeout mechanism, the next time we resend the message as a result of Timeout we need to reflect the current seqNo used by the application in the message.

Methods inherited from class rice.rm.messaging.RMMessage

getCredentials, getSeqno, getSource

Methods inherited from class rice.pastry.messaging.Message

getDate, getDestination, getSenderId, getStream, hasPriority, setPriority, setSenderId, stamp

Methods inherited from class java.lang.Object

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

Field Detail

TIMEOUT

public static int TIMEOUT

The timeout period within which if the response to this message is not received, then the same message is resent.

MAXATTEMPTS

public static int MAXATTEMPTS

The maximum number of attempts made in the timeout mechanism after which the message is ignored.

Constructor Detail

RMRequestKeysMsg

public RMRequestKeysMsg(NodeHandle source,
                        Address address,
                        Credentials authorCred,
                        int seqno,
                        java.util.Vector _rangeSet,
                        int _eventId)

Constructor : Builds a new RM Message

Parameters:

source - the source of the message

address - the RM application address

authorCred - the credentials of the source

seqno - for debugging purposes only

_rangeSet - the rangeSet of this message

_eventId - the eventId of this message

Method Detail

handleDeliverMessage

public void handleDeliverMessage(RMImpl rm)

The handling of the message iterates of the 'rangeSet' as takes the following action on the entries of type RMMessage.KEEntry. If first takes the intersection of the requested range with the range that it is itself responsible for. Then it issues a scan on this intersected range. If the requestor asks only for the hash of the keys in the range, then only the hash is returned, otherwise the key Set correspnding to the intersected range is returned.

Specified by:

handleDeliverMessage in class RMMessage

getEventId

public int getEventId()

setSeqNo

public void setSeqNo(int val)

Since this message has a timeout mechanism, the next time we resend the message as a result of Timeout we need to reflect the current seqNo used by the application in the message.

incrAttempt

public void incrAttempt()

Since this message has a timeout mechanism, the next time we resend the message as a result of Timeout we need to increment the attempt number.

getAttempt

public int getAttempt()