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GUIGCStage.java
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GUIGCStage.java
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import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.text.Text;
import javafx.scene.text.TextFlow;
import javafx.scene.layout.*;
import javafx.scene.control.DialogPane;
import javafx.scene.control.Button;
import java.util.Random;
import javafx.event.ActionEvent;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
public class GUIGCStage extends Stage{
private static int nextId = 0;
private final int ID = nextId++;
private final Random random;
private Pane rootPane;
private volatile int clicks = 0;
private static ArrayList<GCStats> collectGCStats(){
ArrayList<GCStats> gcList = new ArrayList<GCStats>();
for(GarbageCollectorMXBean gc: ManagementFactory.getGarbageCollectorMXBeans()){
GCStats gcStats = new GCStats(
System.currentTimeMillis(),
gc.getName(),
gc.getCollectionCount(),
gc.getCollectionTime()
);
gcList.add(gcStats);
}
return gcList;
}
private GUIGCStage(int seed, int depth, int breadth, int nButtons){
super.setTitle("GUI GC Stage " + ID);
random = new Random(seed);
constructStage(depth, breadth, nButtons);
}
private Pane constructRandomPane(){
switch(random.nextInt(9)){
case 0: return new AnchorPane();
case 1: return new DialogPane();
case 2: return new FlowPane();
case 3: return new GridPane();
case 4: return new HBox();
case 5: return new StackPane();
case 6: return new TextFlow();
case 7: return new TilePane();
default: return new VBox();
}
}
private Pane constructNode(int depth, int breadth, int nButtons){
Pane parent = constructRandomPane();
if(depth>0){
for(int i=0; i<breadth; i++){
parent.getChildren().addAll(constructNode(depth-1, breadth, nButtons));
}
for(int i=0; i<nButtons; i++){
Button button = new Button("Click");
button.setOnAction(this::clicked);
parent.getChildren().addAll(button);
}
}
return parent;
}
private void constructStage(int depth, int breadth, int nButtons){
rootPane = constructNode(depth, breadth, nButtons);
Scene scene = new Scene(rootPane, 300, 300);
setScene(scene);
}
void clicked(ActionEvent event){
clicks++;
}
void clickButtons(){
clickButtons(rootPane);
}
void clickButtons(Pane parent){
if(parent == null){
return;
}
parent.getChildren().forEach((item)->{
if(item instanceof Button){
((Button)item).fire();
}
if(item instanceof Pane){
clickButtons((Pane)item);
}
});
}
public static void runTest(int seed, int depth, int breadth, int nButtons, int sleepTime, boolean runAsyncGCOnSleep){
try{
ArrayList<GCStats> gcs0 = collectGCStats();
long[] t = new long[6];
t[0] = System.currentTimeMillis();
GUIGCStage testStage = new GUIGCStage(seed, depth, breadth, nButtons);
t[1] = System.currentTimeMillis();
testStage.show();
t[2] = System.currentTimeMillis();
testStage.clickButtons();
t[3] = System.currentTimeMillis();
testStage.close();
t[4] = System.currentTimeMillis();
if(sleepTime>0){
if(runAsyncGCOnSleep){
Runnable task = () -> {
System.gc();
};
Thread thread = new Thread(task);
thread.start();
}
Thread.sleep(sleepTime);
}
t[5] = System.currentTimeMillis();
ArrayList<GCStats> gcs1 = collectGCStats();
for(int i = 1; i<t.length; i++){
System.out.print((t[i]-t[i-1]) + "\t");
}
System.out.print((t[t.length-1] - t[0]) + "\t");
for(GCStats gcStats0 : gcs0){
for(GCStats gcStats1 : gcs1){
if(gcStats0.NAME.equals(gcStats1.NAME)){
System.out.print((gcStats1.COUNT - gcStats0.COUNT) + "\t");
System.out.print((gcStats1.TIME - gcStats0.TIME) + "\t");
}
}
}
System.out.println();
} catch (Exception e){
e.printStackTrace(System.err);
}
}
}