org.apache.storm.loadgen

Class ExecAndProcessLatencyEngine

java.lang.Object

org.apache.storm.loadgen.ExecAndProcessLatencyEngine

All Implemented Interfaces:

Serializable

public class ExecAndProcessLatencyEngine
extends Object
implements Serializable

A more accurate sleep implementation.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExecAndProcessLatencyEngine()
ExecAndProcessLatencyEngine(SlowExecutorPattern skewedPattern)

Method Summary

Modifier and Type	Method and Description
void	prepare()
void	simulateProcessAndExecTime(int executorIndex, long startTimeNs, InputStream in, Runnable r) Simulate both process and exec times.
void	sleepNano(long nano)
void	sleepNano(long start, long sleepAmount) Sleep for a set number of nano seconds.
void	sleepUntilNano(long endTime)
static long	toNano(double ms)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExecAndProcessLatencyEngine

public ExecAndProcessLatencyEngine()

ExecAndProcessLatencyEngine

public ExecAndProcessLatencyEngine(SlowExecutorPattern skewedPattern)

Method Detail

toNano

public static long toNano(double ms)

prepare

public void prepare()

sleepNano

public void sleepNano(long start,
                      long sleepAmount)

Sleep for a set number of nano seconds.

Parameters:

start - the start time of the sleep

sleepAmount - how many nano seconds after start when we should stop.

sleepNano

public void sleepNano(long nano)

sleepUntilNano

public void sleepUntilNano(long endTime)

simulateProcessAndExecTime

public void simulateProcessAndExecTime(int executorIndex,
                                       long startTimeNs,
                                       InputStream in,
                                       Runnable r)

Simulate both process and exec times.

Parameters:

executorIndex - the index of this executor. It is used to skew the latencies.

startTimeNs - when the executor started in nano-seconds.

in - the metrics for the input stream (or null if you don’t want to use them).

r - what to run when the process latency is up. Note that this may run on a separate thread after this method call has completed.