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User interface JavaFX应用程序非常慢_User Interface_Javafx_Information Retrieval - Fatal编程技术网

User interface JavaFX应用程序非常慢

User interface JavaFX应用程序非常慢,user-interface,javafx,information-retrieval,User Interface,Javafx,Information Retrieval,作为我们课程项目的一部分,我们构建了一个信息检索引擎。我们被要求用JavaFX运行我们的程序 问题是这个项目非常繁忙,包括:解析文档(460000个文档和多达300万个单词)、向字典添加术语以及更多需要时间的功能 项目在没有GUI的情况下运行所需的时间约为19分钟;它包括合并post文件和将字典从磁盘加载到RAM。 问题是,当我们添加GUI时,时间会成倍增加,几乎达到56分钟 我们认为我们在构建的GUI中做错了什么: 控制器 package sample; import javafx.even

作为我们课程项目的一部分,我们构建了一个信息检索引擎。我们被要求用JavaFX运行我们的程序

问题是这个项目非常繁忙,包括:解析文档(460000个文档和多达300万个单词)、向字典添加术语以及更多需要时间的功能

项目在没有GUI的情况下运行所需的时间约为19分钟;它包括合并post文件和将字典从磁盘加载到RAM。 问题是,当我们添加GUI时,时间会成倍增加,几乎达到56分钟

我们认为我们在构建的GUI中做错了什么:

控制器

package sample;

import javafx.event.ActionEvent;
import javafx.scene.control.Alert;
import javafx.scene.control.TableView;
import javafx.stage.DirectoryChooser;
import javafx.stage.Stage;
import main.Indexer;
import main.ReadFile;
import java.io.File;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

public class Controller {
    public javafx.scene.control.CheckBox checkBox_Stemming;
    public javafx.scene.control.Button btn_start;
    public javafx.scene.control.Button btn_browse_Corpus;
    public javafx.scene.control.Button btn_browse_postfile;
    public javafx.scene.control.Button btn_reset;
    public javafx.scene.control.TextField tf_postfilePath;
    public javafx.scene.control.TextField tf_corpusPath;
    public javafx.scene.control.Button btn_dictionary;
    public TableView table_dic;
    public javafx.scene.control.TableColumn tc_term;
    public javafx.scene.control.TableColumn  tc_tf;
    private Stage mainStage;
    private Indexer indexer;
    private ReadFile rf;

    public void initialize(Stage mainStage) {
        this.mainStage = mainStage;
        mainStage.setMinHeight(600);
        mainStage.setMinWidth(800);
    }

    public String openFile(ActionEvent event) {
        DirectoryChooser chooser = new DirectoryChooser();
        File defaultDirectory = new File("C:\\");
        chooser.setInitialDirectory(defaultDirectory);
        File selectedDirectory = chooser.showDialog(new Stage());
        return selectedDirectory.getPath();
    }

    public void setStopWord(ActionEvent event){
        tf_postfilePath.textProperty().setValue(openFile(event));
    }

    public void setCorpusPath(ActionEvent event){
        tf_corpusPath.textProperty().setValue(openFile(event));
    }

    public void startIndex(ActionEvent event) {
        String corpusPath = tf_corpusPath.textProperty().getValue();
        String postfilePath = tf_postfilePath.textProperty().getValue();

        if(corpusPath.length() > 0 && postfilePath.length() > 0 ){
            long startTime = System.currentTimeMillis();
            indexer=new Indexer();
            rf= new ReadFile();

            try { 


   indexer.Start(rf,corpusPath,checkBox_Stemming.isSelected(),postfilePath);
            } catch (IOException e) {
                e.printStackTrace();
            }

            long stopTime = System.currentTimeMillis();
            long elapsedTime = stopTime - startTime;
            long minutes = TimeUnit.MILLISECONDS.toMinutes(elapsedTime);
            Alert alert = new Alert(Alert.AlertType.INFORMATION);
            alert.setTitle("Information");
            alert.setHeaderText("Look, an Information Dialog");
            alert.setContentText("Number of documents:"+ main.Indexer.n+"\n"
                    +"Number of uniq terms:"+ "\n"+"Running time:"+minutes+ "minutes\n");

            alert.showAndWait();
        } else if (postfilePath.length() > 0) {
            indexer = new Indexer();
            try {
                indexer.createFinalDictionary(postfilePath);
            } catch (IOException e) {
                e.printStackTrace();
            }
        } else {
            Alert alert = new Alert(Alert.AlertType.ERROR);
            alert.setTitle("Problem");
            alert.setHeaderText("Look, an Information Dialog");
            alert.setContentText("The path are empty or both not. please insert only one path postingfile or corpus");

            alert.showAndWait();
        }
    }

    public void resetIndexer(ActionEvent event) {
        Alert alert = new Alert(Alert.AlertType.INFORMATION);
        alert.setTitle("Information");
        alert.setHeaderText("Look, an Information Dialog");
        alert.setContentText("The dictionary and the postingfile deleted");
        alert.showAndWait();
        indexer = null;
        rf = null;
        tf_postfilePath.textProperty().setValue("");
        tf_corpusPath.textProperty().setValue("");
    }

    public void showDictionary(ActionEvent event) {
        System.out.println("hello");

        /**if(indexer != null) {
            HashMap<String, String> dic = indexer.getDic();
            List<String> sortedKeys = new ArrayList(dic.keySet());
            Collections.sort(sortedKeys);
            for (String k:sortedKeys) {
            table_dic.getColumns().addAll(k);
        } else {
            Alert alert = new Alert(Alert.AlertType.INFORMATION);
            alert.setTitle("Information");
            alert.setHeaderText("Look, an Information Dialog");
            alert.setContentText("The dictionary is empty");
            alert.showAndWait();
        }*/
    }
}

非常感谢您的帮助,谢谢。

我关注@Slaw和@luxUSP问题的答案;您应该创建一个服务,其唯一作用是执行指令
indexer.Start(rf、corpusPath、checkBox\u Stemming.isSelected()、postfilePath)。然后在控制器中,您必须启动此服务,然后监听此服务的状态;如果切换到Successed,则可以显示消息框

我已经为您的代码实现了一个基本服务(可能会有一些错误,因为我不知道
Indexer
ReadFile
类是如何生成的):

更新

如果您想更进一步,您甚至可以管理抛出到服务中的异常。当抛出错误时,您的
IndexService
将切换为FAILED,以便您可以显示它

IndexService
类中,只需删除
try catch

    @Override
    protected Task<Boolean> createTask() {
        return new Task<Boolean>() {
            @Override
            protected Boolean call() throws Exception {
                indexer.Start(readFile, corpusPath, stem, postfilePath);
                return true;
            }
        };
    }

我希望它能帮助您:)

可能与性能问题无关,但您使用fxml是完全错误的(控制器和加载的页面之间没有关系)-请确保了解通过fxml注入ui的基本知识:)绝对不相关:请学习java命名约定并坚持这些约定。问题可能是,您在GUI线程中开始索引(一项流程繁重的任务),在方法
startIndex
的eventscope中,您应该启动一个线程,该线程不会中断GUI线程。当这个任务完成时,通过
Platform.runLater(()->{})
Asside检索信息,因为您正在JavaFX应用程序线程上运行一切,正如Luxusproblem所提到的:JavaFX当然会占用一些资源(线程、内存)。根据这些资源的紧张程度,这可能或多或少是一个问题……就我个人而言,我不会在
Task#call()
方法中捕获
IOException
,而是让异常传播。这样,
服务
进入
失败
状态,异常存储在
异常
属性中。是的,好主意,今晚我将更新我的答案,以便它可以管理失败的服务状态。
package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {
    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("IR2020");
        primaryStage.setScene(new Scene(root, 300, 275));
        Controller controller=new Controller();
        controller.initialize(primaryStage);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}
package sample;

import java.util.concurrent.TimeUnit;

import javafx.concurrent.Service;
import javafx.concurrent.Task;

public class IndexService extends Service<Boolean> {
    private String corpusPath;
    private String postFilePath;
    private ReadFile readFile;
    private boolean stemming;

    public IndexService(String cPath, String pfPath, ReadFile rf, boolean stem) {
        corpusPath = cPath;
        postFilePath = pfPath;
        readFile = rf;
        stemming = stem;
    }

    @Override
    protected Task<Boolean> createTask() {
        return new Task<Boolean>() {
            @Override
            protected Boolean call() throws Exception {
                try { 
                    indexer.Start(readFile, corpusPath, stem, postfilePath);
                    return true;
                } catch (IOException e) {
                    e.printStackTrace();
                    return false;
                }
            }
        };
    }
}
@FXML
public void startIndex(ActionEvent event) throws InterruptedException {
    String corpusPath = tf_corpusPath.textProperty().getValue();
    String postfilePath = tf_postfilePath.textProperty().getValue();

    if (corpusPath.length() > 0 && postfilePath.length() > 0) {
        long startTime = System.currentTimeMillis();
        IndexService service = new IndexService(corpusPath, postfilePath, rf, checkBox_Stemming.isSelected());
        service.start();

        service.stateProperty().addListener((bean_p, old_p, new_p) -> {
            switch (new_p) {
                case SUCCEEDED:
                    long stopTime = System.currentTimeMillis();
                    long elapsedTime = stopTime - startTime;
                    long minutes = TimeUnit.MILLISECONDS.toMinutes(elapsedTime);

                    Alert alert = new Alert(Alert.AlertType.INFORMATION);
                    alert.setTitle("Information");
                    alert.setHeaderText("Look, an Information Dialog");
                    alert.setContentText("Number of documents:" + "main.Indexer.n" + "\n" + "Number of uniq terms:" + "\n" + "Running time:" + minutes + "minutes\n");

                    alert.showAndWait();
                    break;
                default:
                    break;
            }
        });
    } else if (postfilePath.length() > 0) {
        indexer = new Indexer();
        try {
            indexer.createFinalDictionary(postfilePath);
        } catch (IOException e) {
            e.printStackTrace();
        }
    } else {
        Alert alert = new Alert(Alert.AlertType.ERROR);
        alert.setTitle("Problem");
        alert.setHeaderText("Look, an Information Dialog");
        alert.setContentText("The path are empty or both not. please insert only one path postingfile or corpus");

        alert.showAndWait();
    }
}
    @Override
    protected Task<Boolean> createTask() {
        return new Task<Boolean>() {
            @Override
            protected Boolean call() throws Exception {
                indexer.Start(readFile, corpusPath, stem, postfilePath);
                return true;
            }
        };
    }
case FAILED:
    Alert alert = new Alert(Alert.AlertType.ERROR);
    alert.setTitle("Error");
    alert.setHeaderText("Look, an Information Dialog");
    alert.setContentText(service.getException().getMessage());

    alert.showAndWait();
    break;