and the value of the request header, requestID can be accessed from the headers of the 

request. This value is then used to retrieve the instance of 

QoSParameters 

from the hash 

table that was populated in 

ingoingFilter

. The exception that occurred is inserted into 

QoSParameters

. 

QoSParameters

 is then passed to 

DBQoSLogger

 and inserted into a 

local database via 

DBConnection

. The instance of 

QoSParameters

 is then removed from 

the hash table and the 

exceptionFilter

 is exited and an error message is returned to the 

user via 

HTTPD 

Having described the interaction of 

HTTPQoS

 with Jigsaw in detail, the purpose of the 

individual classes used by 

HTTPQoS

 is listed in the following table. 

&