peersim.reports
Class ConnectivityObserver

java.lang.Object
  peersim.reports.GraphObserver
      peersim.reports.ConnectivityObserver

All Implemented Interfaces:

Control

public class ConnectivityObserver
extends GraphObserver

Reports statistics about connectivity properties of the network, such as weakly or strongly connected clusters.

Parameter Summary

stats
The parameter used to request cluster size statistics instead of the usual list of clusters.

type
Defines the types of connected clusters to discover.

Parameters inherited from class peersim.reports.GraphObserver

undir

Field Summary

Fields inherited from class peersim.reports.GraphObserver

g, ga, name, pid, undir

Constructor Summary

ConnectivityObserver(java.lang.String name)
Standard constructor that reads the configuration parameters.

Method Summary

boolean

execute() Prints information about clusters.

Methods inherited from class peersim.reports.GraphObserver

updateGraph

Methods inherited from class java.lang.Object

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

Parameter Detail

stats

The parameter used to request cluster size statistics instead of the usual list of clusters. Not set by default.

type

Defines the types of connected clusters to discover. Possible values are

• "wcc": weakly connected clusters
• "scc": strongly connected clusters

Defaults to "wcc".

Constructor Detail

ConnectivityObserver

public ConnectivityObserver(java.lang.String name)

Standard constructor that reads the configuration parameters. Invoked by the simulation engine.

Parameters:

name - the configuration prefix for this class

Method Detail

execute

public boolean execute()

Prints information about clusters. If parameter "stats" is defined then the output is produced by IncrementalStats.toString(), over the sizes of the clusters. Otherwise one line is printed that contains the string representation of a map, that holds cluster IDs mapped to cluster sizes. The meaning of the cluster IDs is not specified, but is printed for debugging purposes.

Returns:

always false

See Also:

GraphAlgorithms.tarjan(peersim.graph.Graph), GraphAlgorithms.weaklyConnectedClusters(peersim.graph.Graph)