Main Page | Modules | Class Hierarchy | Class List | Directories | Class Members | Related Pages | Examples

Attributes
[Data Structures]

Data structures used to describe attributes, either of Aggregates or of Packets. More...

Classes

class  ArrayAttribute< T >
 Attribute that is an array (ordered list possibly with duplication) of other values. More...
class  ByteCountAttribute
 specialized attribute; wraps a call to count the number of packets in an aggregate More...
class  HistogramAttribute< T >
 Attribute that is a histogram. More...
class  PacketCountAttribute
 specialized attribute; wraps a call to count the number of packets in an aggregate More...
class  SetAttribute
 An attribute that is a set (unordered list without duplication) of other values. More...
class  SumAttribute< T >
 Computes a summary of the specified property. More...
class  Attribute
 Base class for representing data attributes of packet aggregates. More...
class  AttributeFunction
 A function used in the computation of an attribute value. More...
class  ScalarAttribute< T >
 A calculation or observation that resolves to a single value. More...
class  PacketAttributeValue
 Class containing a value for a PacketAttribute. More...
class  ConcretePacketAttributeValue< T >
 A set of templated attribute value types. More...
class  PacketAttribute
 An attribute of a packet; the available attributes depends on the type of the packet. More...

Detailed Description

Data structures used to describe attributes, either of Aggregates or of Packets.

Attributes can be computed in two modes: online and offline. Online computation generally means that the Attribute will be associated with an Aggregate before the Aggregate is populated, and will compute its value incrementally with each packet (or possibly each Aggregate) that is added to the Aggregate. Offline computation means that the Attribute will be given a populated Aggregate and will compute its value based on the members of the Aggregate. Attributes MUST support offline computation, and MAY support online computation if feasible. It is understood that for some attributes, it may not be technically possible to compute the value online.

Sliding window aggregates are a special case; it is not likely to be desirable to create instances of the Attribute for each window. <insert brilliant plan for handling sliding windows here...>


Generated on Thu Apr 5 01:02:39 2007 for ANTARES by  doxygen 1.4.2