Class CacheSimulator

java.lang.Object

CacheSimulator

public class CacheSimulator
extends java.lang.Object

Simulate requesting a bunch of URL's and caching them. Produce a report of the contents of the URL Cache, ordered by decreasing frequency of occurrence.

Version:

2014.2.13

Author:

John Dalbey

Constructor Summary

Constructors

Constructor and Description
CacheSimulator() Construct a cache simulator.
CacheSimulator(int cacheSize) Construct a cache simulator with a specified capacity

Method Summary

Methods

Modifier and Type	Method and Description
void	makeReport(java.io.Writer wtr) Produce a report to the specified Writer about the state of the cache after running the simulation.
void	simulate(java.io.Reader rdr) Simulate caching a stream of URL's provided on the given Reader.

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheSimulator

public CacheSimulator()

Construct a cache simulator.

CacheSimulator

public CacheSimulator(int cacheSize)

Construct a cache simulator with a specified capacity

Parameters:

cacheSize - the desired maximum size of the cache

Method Detail

simulate

public void simulate(java.io.Reader rdr)

Simulate caching a stream of URL's provided on the given Reader.

Parameters:

rdr - a Reader from which to read a stream of URL's, one per line (may include leading or trailing blanks)

makeReport

public void makeReport(java.io.Writer wtr)

Produce a report to the specified Writer about the state of the cache after running the simulation. The report will list all the URLs in the cache ordered by decreasing frequency of number of requests. Each line of the report consists of three tab-separated fields: frequency, url, page content.

Parameters:

wtr - a Writer to which to display the output.

Precondition:

simulate() has been called.