ch.ethz.iks.r_osgi.messages
Class TimeOffsetMessage

java.lang.Object
  ch.ethz.iks.r_osgi.messages.RemoteOSGiMessage
      ch.ethz.iks.r_osgi.messages.TimeOffsetMessage

public final class TimeOffsetMessage
extends RemoteOSGiMessage

TimeOffsetMessages measures the time offset between two peers.

Since:

0.2

Author:

Jan S. Rellermeyer, ETH Zurich

Field Summary

Fields inherited from class ch.ethz.iks.r_osgi.messages.RemoteOSGiMessage

DELIVER_BUNDLE, DELIVER_SERVICE, FETCH_SERVICE, INVOKE_METHOD, LEASE, LEASE_UPDATE, METHOD_RESULT, REMOTE_EVENT, STREAM_REQUEST, STREAM_RESULT, TIME_OFFSET, xid

Constructor Summary

TimeOffsetMessage()
creates a new empty TimeSyncMessage.

TimeOffsetMessage(ObjectInputStream input)
creates a new TimeSyncMessage from network packet:

Method Summary

long[]	getTimeSeries() returns the time series.
void	restamp(short newXID) for retransmissions: replace the last timestamp with the current one.
void	setTimeSeries(long[] series) set the time series.
void	timestamp() add the current time to the time series.
String	toString() String representation for debug outputs.
void	writeBody(ObjectOutputStream out) write the body of the message to a stream.

Methods inherited from class ch.ethz.iks.r_osgi.messages.RemoteOSGiMessage

getFuncID, getXID, parse, readBytes, readStringArray, send, setXID, writeBytes, writeStringArray

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeOffsetMessage

public TimeOffsetMessage()

creates a new empty TimeSyncMessage.

TimeOffsetMessage

public TimeOffsetMessage(ObjectInputStream input)
                  throws IOException

creates a new TimeSyncMessage from network packet:

        0                   1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |       R-OSGi header (function = TimeOffset = 7)               |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |                   Marshalled Long[]                           \
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 

.

Parameters:

input - an ObjectInputStream that provides the body of a R-OSGi network packet.

Throws:

IOException - in case of IO failures.

Method Detail

writeBody

public void writeBody(ObjectOutputStream out)
               throws IOException

write the body of the message to a stream.

Specified by:

writeBody in class RemoteOSGiMessage

Parameters:

out - the ObjectOutputStream.

Throws:

IOException - in case of IO failures.

See Also:

ch.ethz.iks.r_osgi.messages.RemoteOSGiMessage#getBody()

timestamp

public void timestamp()

add the current time to the time series.

restamp

public void restamp(short newXID)

for retransmissions: replace the last timestamp with the current one. The sending method must increase the XID to signal that this is a "new" message rather than a strict retransmission.

getTimeSeries

public final long[] getTimeSeries()

returns the time series.

Returns:

the time series as long array.

setTimeSeries

public final void setTimeSeries(long[] series)

set the time series.

Parameters:

series - the time series.

toString

public String toString()

String representation for debug outputs.

Overrides:

toString in class Object

Returns:

a string representation.

See Also:

Object.toString()