com.martensigwart.fakeload

Class DiskInputSimulator

java.lang.Object

com.martensigwart.fakeload.AbstractLoadSimulator

com.martensigwart.fakeload.DiskInputSimulator

All Implemented Interfaces:

LoadSimulator, Runnable

Direct Known Subclasses:

RandomAccessDiskInputSimulator

public abstract class DiskInputSimulator
extends AbstractLoadSimulator

Skeleton implementation of a LoadSimulator that simulates disk input. Disk input is simulated by reading an amount of bytes from a file.

Method Summary

Modifier and Type	Method and Description
void	simulateLoad(long load) Simulates the specified system load.
boolean	waitConditionFulfilled() Represents the 'wait' condition of an AbstractLoadSimulator.

Methods inherited from class com.martensigwart.fakeload.AbstractLoadSimulator

decreaseLoad, getLoad, getMaximumLoad, increaseLoad, isMaximumLoad, isZeroLoad, run, setLoad

Methods inherited from class java.lang.Object

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

Method Detail

simulateLoad

public void simulateLoad(long load)
                  throws InterruptedException

Description copied from class: AbstractLoadSimulator

Simulates the specified system load.

Actual system load simulation happens inside this method. However, the simulation logic implemented here should be kept as short and concise as possible as this method is called from within a while loop internally. Therefore, this method should not start any infinite loops, etc.

Parameters:

load - the load to be simulated

Throws:

InterruptedException - when the thread is interrupted during load simulation

waitConditionFulfilled

public boolean waitConditionFulfilled()

Description copied from class: AbstractLoadSimulator

Represents the 'wait' condition of an AbstractLoadSimulator. In order to save resources, the thread executing the AbstractLoadSimulator.run() method should wait when there is nothing to simulate.

Take for example, a simulator which simulates memory. If it has already allocated the desired amount of memory it has nothing more left to do. In this case the corresponding thread should wait until it retrieves new simulation instructions.

This method is responsible for checking if a simulator currently has something to do or not.

Returns:

returns true if there is nothing to do and false otherwise.