LogHelper.java

/**
 * SlingBeans - NetBeans Sling plugin https://github.com/jkan997/SlingBeans Licensed under Apache 2.0 license http://www.apache.org/licenses/LICENSE-2.0
 */
package org.jkan997.slingbeans.helper;

//import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import org.jkan997.slingbeans.configuration.Configuration;
import org.jkan997.slingbeans.configuration.ConfigurationImpl;

/**
 *
 * @author jkan997
 */
public class LogHelper {

    public static boolean disableLogs = false;
    public static boolean disableHttpLogs = false;
    public static boolean printToConsole = false;
    public final static String PREFIX;
    public final static String HTTP_PREFIX;
    public final static String SETTINGS_DIR;

    static {

        Configuration configuration = ConfigurationImpl.getInstance();
        SETTINGS_DIR = configuration.getSettingsDir();
        PREFIX = SETTINGS_DIR + "/logs";
        File f = new File(PREFIX);
        if (!f.exists()) {
            f.mkdir();
        }
        logInfo(LogHelper.class, "Log prefix " + PREFIX);
        HTTP_PREFIX = PREFIX + "/http";
        f = new File(HTTP_PREFIX);
        if (!f.exists()) {
            f.mkdir();
        }
        checkLogs();
    }

    public static long lastCheckTime = 0;

    private static void checkLogs() {
        long currentTime = System.currentTimeMillis();
        if ((currentTime - lastCheckTime) > 5000) {
            lastCheckTime = currentTime;
            String enableLogsIndicator = SETTINGS_DIR + "/enableLogs";
            String enableHttpLogsIndicator = SETTINGS_DIR + "/enableHttpLogs";
            disableLogs = !IOHelper.fileExists(enableLogsIndicator);
            disableHttpLogs = !IOHelper.fileExists(enableHttpLogsIndicator);
        }
    }

    public static void logError(Exception ex) {
        checkLogs();
        if (disableLogs) {
            return;
        }
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        ex.printStackTrace(pw);
        ex.printStackTrace();
        appendFile("Exception: " + ex.getMessage() + "\n" + sw.toString(), "error");

    }

    public static void logInfo(Object sender, String msg) {
        checkLogs();
        if (disableLogs) {
            return;
        }
        logInfo(sender, msg, new String[]{});
    }

    public static void logInfo(Object sender, String msg, Object... args) {
        checkLogs();
        if (disableLogs) {
            return;
        }
        // if (sender instanceof FileObject) return;
        String fmtMsg = msg;
        String fileName = "out";
        if (args.length > 0) {
            fmtMsg = String.format(msg, args);
        }
        if (sender != null) {
            Class clazz = null;
            if (sender instanceof Class) {
                clazz = (Class) sender;
            } else {
                clazz = sender.getClass();
            }
            fileName = clazz.getSimpleName();
            fmtMsg = clazz.getSimpleName() + ": " + fmtMsg;
        }
        if (printToConsole) {
            System.out.println(fmtMsg);
        }
        appendFile(fmtMsg, fileName);
    }

    private synchronized static void appendFile(String msg, String name) {
        System.out.println(msg);
        try {
            String filename = PREFIX + "/" + name + ".log";
            FileWriter fw = new FileWriter(filename, true); //the true will append the new data
            fw.write(msg);
            fw.write("\n");
            fw.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}