Class Controller

java.lang.Object

controller.Controller

All Implemented Interfaces:

IModelToViewController, IViewToModelController

public class Controller
extends Object
implements IViewToModelController, IModelToViewController

Controls the simulation logic for the simulation page. This class creates the engine, starts the run, changes speed, pauses and resumes the run, and sends engine updates to the UI.

Constructor Summary

Constructors

Constructor	Description
Controller(HistoryPageController historyPageController)	Creates a controller for the history page.
Controller(MainPageController mainPageController)	Creates a controller for the main page.
Controller(ResultsPageController resultsPageController)	Creates a controller for the results page.
Controller(SimulationPageController simulationPageController)	Creates a controller for one simulation page.

Method Summary

Modifier and Type	Method	Description
void	applyBalancedPreset()	Applies the balanced preset to the main page inputs.
void	applyHighFrequencyPreset()	Applies the high-frequency preset to the main page inputs.
void	applySlowPreset()	Applies the slow stable preset to the main page inputs.
void	applyVolatilePreset()	Applies the volatile market preset to the main page inputs.
void	decreaseSpeed()	Makes the simulation slower by increasing the delay.
void	increaseSpeed()	Makes the simulation faster by decreasing the delay.
void	initializeHistoryPage()	Loads saved runs from the database and shows them in the history page menu.
void	initializeMainPage()	Applies the default preset values on the main page inputs.
void	openHistoryPageFromMain()	Opens the history page from the main page after user clicks the History button.
void	openMainPageFromHistory()	Opens the main page from the history page after user clicks return.
void	openMainPageFromResults()	Opens the main page from the results page after user clicks on the button to return to the main page.
void	openSimulationPageFromMain()	Reads main page inputs, and, by user click on the button, opens the simulation page and starts the run there.
void	showEndTime(double time)	Opens the results page after the engine finishes the simulation.
void	showOrderBook(OrderBook.OrderBookSnapshot snapshot)	Requests a fresh order book table update for the simulation page.
void	showResultsPage(StatisticsCollector.Snapshot snapshot, Records.StatisticsAndMetricsRecord record)	Opens the results page and sends final simulation data there.
void	startSimulation(eds.config.SimulationConfig config)	Starts a new simulation run with the selected configuration.
void	togglePause()	Pauses the simulation or resumes it if it is already paused.
void	updateHistoryPage(int recordIndex)	Fills the history page from one database record selected by the user.
void	updateOrderBook(OrderBook.OrderBookSnapshot snapshot)	Sends a new order book snapshot to the simulation page table.
void	updateResultsPage(StatisticsCollector.Snapshot snapshot, Records.StatisticsAndMetricsRecord record)	Fills the results page labels with already computed simulation output.
void	updateTimeAndQueues()	Updates the timer and queue labels on the simulation page.

Methods inherited from class Object

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

Constructor Details

Controller

public Controller(SimulationPageController simulationPageController)

Creates a controller for one simulation page.

Parameters:

simulationPageController - the simulation page that receives UI updates

Controller

public Controller(MainPageController mainPageController)

Creates a controller for the main page.

Parameters:

mainPageController - the main page that sends user input to this controller

Controller

public Controller(ResultsPageController resultsPageController)

Creates a controller for the results page.

Parameters:

resultsPageController - the results page that shows final simulation output

Controller

public Controller(HistoryPageController historyPageController)

Creates a controller for the history page.

Parameters:

historyPageController - the history page that handles navigation

Method Details

initializeMainPage

public void initializeMainPage()

Applies the default preset values on the main page inputs. The balanced preset chose as default, but can be changed.

Specified by:

initializeMainPage in interface IViewToModelController

initializeHistoryPage

public void initializeHistoryPage()

Loads saved runs from the database and shows them in the history page menu.

Specified by:

initializeHistoryPage in interface IViewToModelController

applyBalancedPreset

public void applyBalancedPreset()

Applies the balanced preset to the main page inputs.

Specified by:

applyBalancedPreset in interface IViewToModelController

applySlowPreset

public void applySlowPreset()

Applies the slow stable preset to the main page inputs.

Specified by:

applySlowPreset in interface IViewToModelController

applyHighFrequencyPreset

public void applyHighFrequencyPreset()

Applies the high-frequency preset to the main page inputs.

Specified by:

applyHighFrequencyPreset in interface IViewToModelController

applyVolatilePreset

public void applyVolatilePreset()

Applies the volatile market preset to the main page inputs.

Specified by:

applyVolatilePreset in interface IViewToModelController

openSimulationPageFromMain

public void openSimulationPageFromMain()

Reads main page inputs, and, by user click on the button, opens the simulation page and starts the run there.

Specified by:

openSimulationPageFromMain in interface IViewToModelController

openHistoryPageFromMain

public void openHistoryPageFromMain()

Opens the history page from the main page after user clicks the History button.

Specified by:

openHistoryPageFromMain in interface IViewToModelController

updateResultsPage

public void updateResultsPage(StatisticsCollector.Snapshot snapshot,
 Records.StatisticsAndMetricsRecord record)

Fills the results page labels with already computed simulation output.

Specified by:

updateResultsPage in interface IViewToModelController

Parameters:

snapshot - the final simulation snapshot

record - the saved metrics record used for readable insight text

updateHistoryPage

public void updateHistoryPage(int recordIndex)

Fills the history page from one database record selected by the user.

Specified by:

updateHistoryPage in interface IViewToModelController

Parameters:

recordIndex - index of the selected saved simulation run

openMainPageFromResults

public void openMainPageFromResults()

Opens the main page from the results page after user clicks on the button to return to the main page.

Specified by:

openMainPageFromResults in interface IViewToModelController

openMainPageFromHistory

public void openMainPageFromHistory()

Opens the main page from the history page after user clicks return.

Specified by:

openMainPageFromHistory in interface IViewToModelController

startSimulation

public void startSimulation(eds.config.SimulationConfig config)

Starts a new simulation run with the selected configuration.

Specified by:

startSimulation in interface IViewToModelController

Parameters:

config - the full set of values for the simulation run

decreaseSpeed

public void decreaseSpeed()

Makes the simulation slower by increasing the delay.

Specified by:

decreaseSpeed in interface IViewToModelController

increaseSpeed

public void increaseSpeed()

Makes the simulation faster by decreasing the delay.

Specified by:

increaseSpeed in interface IViewToModelController

togglePause

public void togglePause()

Pauses the simulation or resumes it if it is already paused.

Specified by:

togglePause in interface IViewToModelController

showEndTime

public void showEndTime(double time)

Opens the results page after the engine finishes the simulation.

Specified by:

showEndTime in interface IModelToViewController

Parameters:

time - the final simulation time reported by the engine

updateTimeAndQueues

public void updateTimeAndQueues()

Updates the timer and queue labels on the simulation page.

Specified by:

updateTimeAndQueues in interface IModelToViewController

updateOrderBook

public void updateOrderBook(OrderBook.OrderBookSnapshot snapshot)

Sends a new order book snapshot to the simulation page table.

Specified by:

updateOrderBook in interface IModelToViewController

Parameters:

snapshot - the latest order book state from the engine

showResultsPage

public void showResultsPage(StatisticsCollector.Snapshot snapshot,
 Records.StatisticsAndMetricsRecord record)

Opens the results page and sends final simulation data there.

Specified by:

showResultsPage in interface IViewToModelController

Parameters:

snapshot - the final simulation snapshot

record - the final database record with metrics

showOrderBook

public void showOrderBook(OrderBook.OrderBookSnapshot snapshot)

Requests a fresh order book table update for the simulation page.

Specified by:

showOrderBook in interface IViewToModelController

Parameters:

snapshot - the latest order book snapshot