Logger Test

package ml.neoforex;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;

/*
 * NeoForex 2015. www.neoforex.ml
 * Only for NeoForex projects.
 * Programmer Name: Daniel Hurtado(Forex) Email: forest_project@hotmail.es/forex.neoforex.ml
 * Contact to Programmer for report bugs/Error's.
 */
public class Logger {
    // Vars with default values.
    private boolean isEnable = false;
    private boolean fileLogEnable = true;
    private String fileSaveFolder = "logs/";

    // Class information
    private String className = "";

    // System properties
    private Properties systemProperties;

    // Get vars for JVM..
    public Logger(Class<?> classInfo) {
        // Get System Properties...
        this.systemProperties = System.getProperties();

        // Get default properties...
        this.isEnable = Boolean.parseBoolean(systemProperties
                .getProperty("ml.neoforex.sockets.consoleEnable"));
        this.fileLogEnable = Boolean.parseBoolean(systemProperties
                .getProperty("ml.neoforex.sockets.fileLogEnable"));

        // Set Logger url
        if (this.fileLogEnable) {
            if (!this.fileSaveFolder.equals(systemProperties
                    .getProperty("ml.neoforex.sockets.fileSaveFolder"))
                    && systemProperties
                            .getProperty("ml.neoforex.sockets.fileSaveFolder") != null) {
                this.fileSaveFolder = systemProperties
                        .getProperty("ml.neoforex.sockets.fileSaveFolder");
            }
        }

        // Check folder
        this.checkSaveFolder();

        // Get the className and save class...
        this.className = classInfo.getCanonicalName();

        // Start writing to log files
        writeFileAlert("- Alert log started at: ".concat(this.getNowTime())
                .concat(" -"));
    }

    // Output the alert and write if is necessary in console and log file.
    public void writeAlert(Object message) {
        StringBuilder messageBuilder = new StringBuilder();
        messageBuilder.append("[".concat(this.className.toUpperCase())
                .concat("][ALERT][").concat(this.getNowTime()).concat("]-> "));
        try {
            messageBuilder.append(message);
            if (this.isEnable)
                System.err.println(messageBuilder.toString());

            if (this.fileLogEnable)
                this.writeFileAlert(messageBuilder.toString());
        } catch (Exception e) {
            e.printStackTrace();
            messageBuilder = null;
        } finally {
            messageBuilder = null;
        }
    }

    // Write to Alert log file.
    private void writeFileAlert(String message) {
        FileWriter alertFile = null;
        try {
            // Start FileWriter -> This put the text in the last line.
            alertFile = new FileWriter(this.fileSaveFolder.concat("alert.log"),
                    true);
            // Write, flush and close the FileWrite
            alertFile.write(message + "\r\n");
            alertFile.flush();
            alertFile.close();
        } catch (Exception e) {
            e.printStackTrace();
            alertFile = null;
        } finally {
            // Delete that for clean RAM.
            alertFile = null;
        }
    }

    // Check folder and log files if not exist and create that...
    private void checkSaveFolder() {
        // Get folder
        File saveFolder = new File(this.fileSaveFolder);

        // check if that exist :D
        if (!saveFolder.exists())
            saveFolder.mkdir();

        // Create file if that not exist.
        saveFolder = new File(this.fileSaveFolder.concat("alert.log"));
        if (!saveFolder.exists()) {
            FileWriter alertFile;
            try {
                alertFile = new FileWriter(
                        this.fileSaveFolder.concat("alert.log"));
                PrintWriter pw = new PrintWriter(alertFile);
                pw.println("- Alert log started at: ".concat(this.getNowTime())
                        .concat(" -"));
                pw.flush();
                pw.close();
                alertFile.close();

                pw = null;
                alertFile = null;
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        saveFolder = null;
    }

    // Get time in string...
    private String getNowTime() {
        Date nowTime = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/y hh:mm:ss");
        return dateFormat.format(nowTime);
    }

    // This void is called by the gc.
    protected void finalize() {
        // Remove all.
        this.isEnable = false;
        this.fileLogEnable = false;
        this.fileSaveFolder = null;
        this.className = null;
        this.systemProperties = null;
    }
}