org.apache.storm.loadgen

Class OutputStream

java.lang.Object

org.apache.storm.loadgen.OutputStream

All Implemented Interfaces:

Serializable

public class OutputStream
extends Object
implements Serializable

A set of measurements about a stream so we can statistically reproduce it.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	OutputStream.Builder

Field Summary

Fields

Modifier and Type	Field and Description
boolean	areKeysSkewed
String	id
NormalDistStats	rate

Constructor Summary

Constructors

Constructor and Description
OutputStream(String id, NormalDistStats rate, boolean areKeysSkewed) Create a new stream with stats.

Method Summary

Modifier and Type	Method and Description
static OutputStream	fromConf(Map<String,Object> conf) Create an output stream from a config.
OutputStream	remap(String origId, Map<GlobalStreamId,GlobalStreamId> remappedStreams)
OutputStream	scaleThroughput(double v)
Map<String,Object>	toConf() Convert this to a conf.

Methods inherited from class java.lang.Object

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

Field Detail

id

public final String id

rate

public final NormalDistStats rate

areKeysSkewed

public final boolean areKeysSkewed

Constructor Detail

OutputStream

public OutputStream(String id,
                    NormalDistStats rate,
                    boolean areKeysSkewed)

Create a new stream with stats.

Parameters:

id - the id of the stream

rate - the rate of tuples being emitted on this stream

areKeysSkewed - true if keys are skewed else false. For skewed keys we only simulate it by using a gaussian distribution to the keys instead of an even distribution. Tere is no effort made right not to measure the skewness and reproduce it.

Method Detail

fromConf

public static OutputStream fromConf(Map<String,Object> conf)

Create an output stream from a config.

Parameters:

conf - the config to read from.

Returns:

the read OutputStream.

toConf

public Map<String,Object> toConf()

Convert this to a conf.

Returns:

the conf.

remap

public OutputStream remap(String origId,
                          Map<GlobalStreamId,GlobalStreamId> remappedStreams)

scaleThroughput

public OutputStream scaleThroughput(double v)