edu.harvard.i2b2.navigator.LoggerDialog.java Source code

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Here is the source code for edu.harvard.i2b2.navigator.LoggerDialog.java

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/*
* Copyright (c) 2006-2012 Massachusetts General Hospital 
 * All rights reserved. This program and the accompanying materials 
* are made available under the terms of the i2b2 Software License v2.1 
 * which accompanies this distribution. 
 * 
 * Contributors: 
 *   
 *     
 */

package edu.harvard.i2b2.navigator;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

/**
 * this class displays a dialog with the contents of i2b2 log4j file file
 * currently located in base class path i2b2.log
 * 
 * @author wwg0
 * 
 */
public class LoggerDialog extends Dialog {

    private static final Log log = LogFactory.getLog(LoggerDialog.class);
    // path to log file (currently in base class path)
    private String filePath = "i2b2.log";

    public String getFilePath() {
        return filePath;
    }

    public void setFilePath(String filePath) {
        this.filePath = filePath;
    }

    private String LOGGER_ERROR_MSG = "Log file empty or not available- " + filePath;

    /**
     * constructor
     * 
     * @param parent
     */
    public LoggerDialog(Shell parent) {
        super(parent, SWT.DIALOG_TRIM | SWT.MODELESS);
        setText("I2B2 Error Log");
    }

    public void open() {
        // create dialog window
        Shell shell = new Shell(getParent(), getStyle());
        shell.setText("I2B2 Error Log");
        createContents(shell);
        shell.setSize(800, 600);
        shell.open();
        Display display = getParent().getDisplay();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }

        }

    }

    private void createContents(final Shell shell) {
        shell.setLayout(new FillLayout());
        final Text text = new Text(shell, SWT.BORDER | SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);

        // String filePath = "i2b2.log";
        File testFile = new File(filePath);

        String contents = getContents(testFile);

        if (contents.equals("")) {
            text.setText(LOGGER_ERROR_MSG);
        } else {
            text.setText(contents);
        }
        // System.out.println("contents=" + contents);

    }

    /**
     * reads the i2b2.log file in the classpath directory
     * 
     * @param aFile
     *            file
     * @return
     */
    public static String getContents(File file) {

        // file contents
        StringBuffer contents = new StringBuffer();
        // declared here to make visible to finally clause
        BufferedReader input = null;
        try {
            // this implementation reads one line at a time
            // FileReader always assumes default encoding
            input = new BufferedReader(new FileReader(file));
            String line = null;
            while ((line = input.readLine()) != null) {
                contents.append(line);
                contents.append(System.getProperty("line.separator"));
            }
        } catch (FileNotFoundException ex) {
            // ex.printStackTrace();
            // System.out.println(ex.getMessage());
            log.error(ex.getMessage());

        } catch (IOException ex) {
            // ex.printStackTrace();
            // System.out.println(ex.getMessage());
            log.error(ex.getMessage());

        } finally {
            try {
                if (input != null) {
                    // flush and close input streams and readers
                    input.close();
                }
            } catch (IOException ex) {
                // ex.printStackTrace();
                // System.out.println(ex.getMessage());
                log.error(ex.getMessage());
            }
        }
        return contents.toString();

    }

}