javaclients
Class Latency

java.lang.Object
  javaclients.Latency

All Implemented Interfaces:

I_Callback

public class Latency
extends java.lang.Object
implements I_Callback

Measure the brutto roundtrip latency of a message publish and update.

Invoke examples (put xmlBlaster.jar in your CLASSPATH):
On localhost:

   java org.xmlBlaster.Main
   java javaclients.Latency -numSend 100
 

Over the internet with CORBA:

   java javaclients.Latency -numSend 100 -bootstrapHostname server.xmlBlaster.org
  or if you have a dynamic IP:
   java javaclients.Latency -numSend 100 -bootstrapHostname server.xmlBlaster.org -dispatch/callback/plugin/ior/hostname 
 

Over the internet with XmlRpc:

   java javaclients.Latency -numSend 100 -dispatch/connection/protocol XMLRPC -dispatch/connection/plugin/xmlrpc/hostname server.xmlBlaster.org -dispatch/callback/plugin/xmlrpc/hostname 
 

Results, for one round trip including publish -> processing in xmlBlaster -> update -> parsing in client (600 MHz AMD Linux):

• CORBA in intranet: ~ 6 milliseconds
• XmlRpc in intranet: ~ 16 milliseconds
• CORBA over internet: ~ 105 milliseconds
• XmlRpc over internet: ~ 320 milliseconds

Field Summary

private static java.util.logging.Logger	log
private boolean	messageArrived
private long	startTime

Constructor Summary

Latency(Global glob)

Method Summary

static void	main(java.lang.String[] args) Try
java.lang.String	update(java.lang.String cbSessionId, UpdateKey updateKey, byte[] content, UpdateQos updateQos) This is the callback method invoked from I_XmlBlasterAccess informing the client in an asynchronous mode about a new message.

Methods inherited from class java.lang.Object

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

Field Detail

startTime

private long startTime

messageArrived

private boolean messageArrived

log

private static java.util.logging.Logger log

Constructor Detail

Latency

public Latency(Global glob)

Method Detail

update

public java.lang.String update(java.lang.String cbSessionId,
                               UpdateKey updateKey,
                               byte[] content,
                               UpdateQos updateQos)

Description copied from interface: I_Callback

This is the callback method invoked from I_XmlBlasterAccess informing the client in an asynchronous mode about a new message.

So you should implement in your client code the I_Callback interface - suppling the update() method where you can do with the message whatever you want.

The raw protocol driver specific update() method (e.g. CORBA-BlasterCallback.update()) is unpacked and for each arrived message this update is called.

Specified by:

update in interface I_Callback

Parameters:

cbSessionId - The session ID specified by the client which registered the callback. You can specify a cbSessionId during connection (with ConnectQos) and this is bounced back here so you can authenticate the message.

updateKey - The arrived key containing the topic name

content - The arrived message content. This is your payload.

See Also:

I_XmlBlasterAccess

main

public static void main(java.lang.String[] args)

Try

   java javaclients.Latency -help
 

for usage help