Class 

Description 

RequestChecker 

RequestChecker provides information on SLA mappings for all 

services that the customer wants monitored. This information is used 

by 

HTTPQoS

 to determine if a particular request should be 

monitored. 

SLAAgent 

Retrieves the list of services from the SLAVSP for the Customer via 

HTTP. The information returned is in XML which is parses to 

determine if any service that is currently monitored has been updated 

or new services added since the previous retrieval. It logs the 

retrieved information to the database if appropriate. 

SLAAgent

retrieves the service data at a specific period that's defined in the 

information downloaded. If the SLAVSP cannot be contacted, the 

SLAAgent will attempt a connection again in a predefined period. 

QoSParameters 

Stored information on each request that is to be monitored. 

DBQoSLogger 

Logs the data contained in an instance of 

QoSParameters

RequestDataMover 

Analyses the output stream associated with the message body of a 

request. It calculates the amount of data contained in the message 

body and the time taken to upload the data to the target server. 

ReplyDataMover 

Analyses the input stream associated with the message body of a 

reply. It calculates the amount of data contained in the message body 

and the time taken to download the data from the target server. 

Table 4: Table of Classes Used by HTTPQoS