projmi/src/main/java/de/uniluebeck/mi/projmi6/controller/LogController.java

package de.uniluebeck.mi.projmi6.controller;

import de.uniluebeck.mi.projmi6.db.DBHandler;
import de.uniluebeck.mi.projmi6.model.HL7LogEntry;
import javafx.collections.FXCollections;
import javafx.concurrent.Task;
import javafx.fxml.FXML;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.text.Text;

import java.time.LocalDateTime;
import java.util.List;


/**
 * Created by 631806 on 19.11.15.
 */
public class LogController {
    final MainController mainController;

    @FXML
    TableView<HL7LogEntry> tblLog;

    @FXML
    TableColumn<HL7LogEntry, String> colLogIp, colLogMessage;

    @FXML
    TableColumn<HL7LogEntry, LocalDateTime> colLogTime;

    @FXML
    TableColumn<HL7LogEntry, HL7LogEntry.Direction> colLogDirection;


    @FXML
    Button btnRefresh;
    private Task<List<HL7LogEntry>> loadLogEntryTask = null;

    public LogController(MainController mainController) {
        this.mainController = mainController;
    }

    @FXML
    private void initialize() {
        initColumns();
        refreshLogFromDb();
    }

    private void initColumns() {
        colLogDirection.setCellValueFactory(new PropertyValueFactory<HL7LogEntry, HL7LogEntry.Direction>("direction"));
        colLogIp.setCellValueFactory(new PropertyValueFactory<HL7LogEntry, String>("source"));
        colLogTime.setCellValueFactory(new PropertyValueFactory<HL7LogEntry, LocalDateTime>("timestamp"));
        colLogMessage.setCellValueFactory(new PropertyValueFactory<HL7LogEntry, String>("message"));

        colLogMessage.setCellFactory(column -> {
            return new TableCell<HL7LogEntry, String>() {
                private TextArea textArea = new TextArea();

                {
                    textArea.setEditable(false);
                    textArea.setPrefRowCount(5);
                }

                @Override
                protected void updateItem(String item, boolean empty) {
                    super.updateItem(item, empty);
                    this.setText(null);
                    if (item == null || empty) {
                        this.setGraphic(null);
                        return;
                    }
                    textArea.setText(item);
                    textArea.setWrapText(true);
                    this.setGraphic(textArea);
                }
            };
        });
    }

    public void refreshLogFromDb() {
        if (this.loadLogEntryTask != null && this.loadLogEntryTask.isRunning()) {
            return;
        }

        btnRefresh.setDisable(true);

        tblLog.setItems(null);
        mainController.increaseParallelTaskCount();

        tblLog.setPlaceholder(new Text("Liste wird geladen..."));

        loadLogEntryTask = new Task<List<HL7LogEntry>>() {

            @Override
            protected List<HL7LogEntry> call() throws Exception {
                return FXCollections.observableArrayList(DBHandler.getLastHL7LogEntries());
            }

            @Override
            protected void succeeded() {
                super.succeeded();
                tblLog.setPlaceholder(new Text("Liste ist leer."));
                tblLog.setItems(FXCollections.observableArrayList(this.getValue()));
                mainController.decreaseParallelTaskCount();
                btnRefresh.setDisable(false);

            }

            @Override
            protected void failed() {
                super.failed();
                tblLog.setPlaceholder(new Text("Laden fehlgeschlagen"));
                mainController.decreaseParallelTaskCount();
                tblLog.setItems(null);
                getException().printStackTrace();
            }
        };

        Thread thread = new Thread(loadLogEntryTask);
        thread.setDaemon(true);
        thread.start();
    }


    @FXML
    private void clickedRefresh() {
        refreshLogFromDb();
    }


}