Package org.opennms.nephron.testing.flowgen

Class FlowConfig

java.lang.Object

org.opennms.nephron.testing.flowgen.FlowConfig

All Implemented Interfaces:

Serializable

public class FlowConfig
extends Object
implements Serializable

Parameterizes the generation of flows.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
org.apache.beam.sdk.transforms.SerializableFunction<Integer,org.joda.time.Duration>	clockSkew	A function that given a nodeId returns the clockSkew for that node.
static org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant>	CURRENT_TIME_LAST_SWITCHED_POLICY	Returns a function that always return the current time instant.
double	flowDurationLambda	Flow durations are calculated using an exponential distribution.
org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant>	lastSwitched	A function that given the index of a generated flow returns its lastSwitched timestamp.
org.joda.time.Duration	lastSwitchedSigma	LastSwitched timestamps are randomized by a normal distribution with the given sigma.
int	minExporter	Exporter numbers are generated uniformly starting at minExporter.
int	minInterface	Interface numbers are generated uniformly starting at minInterface.
int	numApplications
int	numDscps
int	numEcns
int	numExporters
int	numHosts
int	numInterfaces
int	numProtocols

Constructor Summary

Constructors

Constructor	Description
FlowConfig(int minExporter, int numExporters, int minInterface, int numInterfaces, int numProtocols, int numApplications, int numHosts, int numEcns, int numDscps, org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant> lastSwitched, org.apache.beam.sdk.transforms.SerializableFunction<Integer,org.joda.time.Duration> clockSkew, org.joda.time.Duration lastSwitchedSigma, double flowDurationLambda)
FlowConfig(FlowGenOptions opts, org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant> lastSwitched, org.apache.beam.sdk.transforms.SerializableFunction<Integer,org.joda.time.Duration> clockSkew)

Method Summary

Modifier and Type	Method	Description
static org.apache.beam.sdk.transforms.SerializableFunction<Integer,org.joda.time.Duration>	groupClockSkewPolicy(FlowGenOptions options)	A clock skew policy that calculates for each nodeId a clock skew group number between 0 and FlowGenOptions.getNumClockSkewGroups() and uses that group number as a factor for multiplying the FlowGenOptions.getClockSkewMs().
static org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant>	linearIncreasingLastSwitchedPolicy(org.joda.time.Instant start, org.joda.time.Duration step)	Calculates the lastSwitched timestamp linearly starting at start and increasing by step for each index.
static org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant>	uniformInWindowLastSwitchedPolicy(FlowGenOptions opts)	Calculates the lastSwitched timestamp uniformly distributed according to the configured start, window size, and number of flows per window.

Methods inherited from class java.lang.Object

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

Field Detail

CURRENT_TIME_LAST_SWITCHED_POLICY

public static org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant> CURRENT_TIME_LAST_SWITCHED_POLICY

Returns a function that always return the current time instant.

minExporter

public final int minExporter

Exporter numbers are generated uniformly starting at minExporter.

numExporters

public final int numExporters

minInterface

public final int minInterface

Interface numbers are generated uniformly starting at minInterface.

numInterfaces

public final int numInterfaces

numProtocols

public final int numProtocols

numApplications

public final int numApplications

numHosts

public final int numHosts

numEcns

public final int numEcns

numDscps

public final int numDscps

lastSwitched

public final org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant> lastSwitched

A function that given the index of a generated flow returns its lastSwitched timestamp. The returned lastSwitched time instant is additionally randomized by a normal distribution. Note: Function implementations must not be referentially transparent. Function implementations may ignore the function parameter and simply return the current time instant.

clockSkew

public final org.apache.beam.sdk.transforms.SerializableFunction<Integer,org.joda.time.Duration> clockSkew

A function that given a nodeId returns the clockSkew for that node.

lastSwitchedSigma

public final org.joda.time.Duration lastSwitchedSigma

LastSwitched timestamps are randomized by a normal distribution with the given sigma.

flowDurationLambda

public final double flowDurationLambda

Flow durations are calculated using an exponential distribution. The random value returned by the exponential distribution is the flow length in seconds.

Constructor Detail

FlowConfig

public FlowConfig(int minExporter,
                  int numExporters,
                  int minInterface,
                  int numInterfaces,
                  int numProtocols,
                  int numApplications,
                  int numHosts,
                  int numEcns,
                  int numDscps,
                  org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant> lastSwitched,
                  org.apache.beam.sdk.transforms.SerializableFunction<Integer,org.joda.time.Duration> clockSkew,
                  org.joda.time.Duration lastSwitchedSigma,
                  double flowDurationLambda)

FlowConfig

public FlowConfig(FlowGenOptions opts,
                  org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant> lastSwitched,
                  org.apache.beam.sdk.transforms.SerializableFunction<Integer,org.joda.time.Duration> clockSkew)

Method Detail

linearIncreasingLastSwitchedPolicy

public static org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant> linearIncreasingLastSwitchedPolicy(org.joda.time.Instant start,
                                                                                                                                                                      org.joda.time.Duration step)

Calculates the lastSwitched timestamp linearly starting at start and increasing by step for each index.

uniformInWindowLastSwitchedPolicy

public static org.apache.beam.sdk.transforms.SerializableBiFunction<Long,FlowDocuments.FlowData,org.joda.time.Instant> uniformInWindowLastSwitchedPolicy(FlowGenOptions opts)

Calculates the lastSwitched timestamp uniformly distributed according to the configured start, window size, and number of flows per window.

groupClockSkewPolicy

public static org.apache.beam.sdk.transforms.SerializableFunction<Integer,org.joda.time.Duration> groupClockSkewPolicy(FlowGenOptions options)

A clock skew policy that calculates for each nodeId a clock skew group number between 0 and FlowGenOptions.getNumClockSkewGroups() and uses that group number as a factor for multiplying the FlowGenOptions.getClockSkewMs().