LoadBalancer Class Reference

Manages incoming requests and distributes them among a set of web servers. More...

#include <loadbalancer.h>

Public Member Functions
	LoadBalancer (LogManager &logger)
	Constructs a LoadBalancer with a specified LogManager for logging.
int	getTime () const
	Gets the current simulation time.
void	incTime ()
	Increments the current simulation time by one unit.
void	addRequest (const Request &r)
	Adds a request to the request queue.
Request	getRequest ()
	Retrieves and removes the next request from the request queue.
bool	isRequestQueueEmpty () const
	Checks if the request queue is empty.
size_t	getRequestQueueSize () const
	Gets the size of the request queue.
int	getProcessedRequests () const
	Gets the total number of processed requests.
void	incrementProcessedRequests ()
	Increments the count of processed requests by one.
WebServer &	getNextServer ()
	Retrieves the next available server for processing requests.
void	allocateServer ()
	Allocates additional servers if needed.
void	deallocateServer ()
	Deallocates servers that are no longer active.
bool	isIpBlocked (const std::string &ip) const
	Checks if a given IP address is blocked.
int	getRejectedRequests () const
	Gets the total number of rejected requests.
int	getActiveServers () const
	Gets the total number of active servers.
int	getInactiveServers () const
	Gets the total number of inactive servers.
void	setTotalServers (int total)
	Sets the total number of servers managed by the LoadBalancer.

Detailed Description

Manages incoming requests and distributes them among a set of web servers.

The LoadBalancer is responsible for queuing incoming requests, managing server allocation, monitoring server statuses, and logging information about processed and rejected requests.

Constructor & Destructor Documentation

LoadBalancer()

LoadBalancer::LoadBalancer

(

LogManager &

logger

)

Constructs a LoadBalancer with a specified LogManager for logging.

Parameters

logger

Reference to a LogManager object used for logging activities.

Member Function Documentation

addRequest()

void LoadBalancer::addRequest

(

const Request &

r

)

Adds a request to the request queue.

Parameters

r	The Request object to be added to the queue.

This function checks if the IP of the request is blocked. If it is not blocked, the request is added to the queue, and the processed request count is updated. If the IP is blocked, the request is rejected, and the rejection is logged.

Parameters

r	The Request object to be added to the queue.

allocateServer()

void LoadBalancer::allocateServer

(

)

Allocates additional servers if needed.

Allocates additional servers if needed based on the current request queue size.

A new server is allocated if the queue size exceeds five times the number of servers and the total number of servers is below the maximum allowed.

deallocateServer()

void LoadBalancer::deallocateServer

(

)

Deallocates servers that are no longer active.

Deallocates servers that are no longer active based on the current request queue size.

A server is deallocated if the queue size is less than two times the number of servers and the total number of servers is above the minimum required.

getActiveServers()

int LoadBalancer::getActiveServers

(

)

const

Gets the total number of active servers.

Returns

The count of active servers as an integer.

getInactiveServers()

int LoadBalancer::getInactiveServers

(

)

const

Gets the total number of inactive servers.

Returns

The count of inactive servers as an integer.

getNextServer()

WebServer & LoadBalancer::getNextServer

(

)

Retrieves the next available server for processing requests.

Returns

A reference to the next WebServer object.

getProcessedRequests()

int LoadBalancer::getProcessedRequests

(

)

const

Gets the total number of processed requests.

Returns

The count of processed requests as an integer.

getRejectedRequests()

int LoadBalancer::getRejectedRequests

(

)

const

Gets the total number of rejected requests.

Returns

The count of rejected requests as an integer.

getRequest()

Request LoadBalancer::getRequest

(

)

Retrieves and removes the next request from the request queue.

Returns

The next Request object in the queue.

getRequestQueueSize()

size_t LoadBalancer::getRequestQueueSize

(

)

const

Gets the size of the request queue.

Returns

The number of requests in the queue.

getTime()

int LoadBalancer::getTime

(

)

const

Gets the current simulation time.

Returns

The current time as an integer.

incrementProcessedRequests()

void LoadBalancer::incrementProcessedRequests

(

)

Increments the count of processed requests by one.

incTime()

void LoadBalancer::incTime

(

)

Increments the current simulation time by one unit.

isIpBlocked()

bool LoadBalancer::isIpBlocked

(

const std::string &

ip

)

const

Checks if a given IP address is blocked.

Parameters

ip	The IP address to check.

Returns

True if the IP address is blocked, false otherwise.

isRequestQueueEmpty()

bool LoadBalancer::isRequestQueueEmpty

(

)

const

Checks if the request queue is empty.

Returns

True if the request queue is empty, false otherwise.

setTotalServers()

void LoadBalancer::setTotalServers

(

int

total

)

Sets the total number of servers managed by the LoadBalancer.

Parameters

total

The total number of servers to set.

---

The documentation for this class was generated from the following files:

• loadbalancer.h
• loadbalancer.cpp