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At the moment a default entry looks something like this: Oct 12, 2008 9:45:18 AM myClassInfoHere INFO: MyLogMessageHere How do I get it to do this? Oct 12, 2008 9:45:18 AM myClassInfoHere - INFO: MyLogMessageHere Clarification I'm using java.util.logging
i would like to know how to use the java.util.logging api, in order to have log message written in different log file depending on the level used. If the level is INFO then i would like to have the message written in /log/info.log and so on. The 3 defined level are severe, warning and info.
I have a common logging.properties inside my tomcat/conf directory.. how can I modify it to be able to process (with a java class) all the log generated by my application? Is there any way to do that without using a wrapper (from Log API) class??
I have a jsp project where I using the java.util.logging.Logger class to log information. At the moment my code is logging exceptions using this class, however, i would like to view the data written this log. How do I do that?
I'm developing a Java application that uses java.util.logging for its logging needs. This application uses a multitude of external libraries (JDBC, JMS clients, JSR-160 implementation, etc), some of which also use java.util.logging. I want to set the log level for my Loggers to ALL when I specify a flag on the command line, but so far I have only found ways to set the level for all loggers, no...
I was just wondering if following thing exists. I have a TCP communicator which keeps communicating with thousands of devices. Currently, the TCP communicator logs all the events in one log file. Now, is it possible to log communication with every device in different files. The IMEI number of every device is different. So the logger will check if a file with name equal to the IMEI number ...
The Java docs for Logger indicate that the logger name should be based on the class name. Google Guice handles this in BinderImpl.java where it does the following: return member == null ? Logger.getAnonymousLogger() : Logger.getLogger(member.getDeclaringClass().getName()); However, since it's getting a new logger for each class, I would lose access to whatever Handler's may have...
Question pretty much sums it. I mistakenly import the java.util.logging and don't get the desired functionality . Now i solve my problem but i want to know why android has created two Handler . We can mistakenly import the wrong one. Same as it did with Fragment and Support Fragment.
How can I let my JDK logger use my customized formatter implementation without specifying a properties file? I want to set the format by programming. for example I have my implementation like: My Formatter extends Formatter {...}
I'm writing my own logging Handler for Java and I'd like to insert the line number of the log message to my output. Here's my current attempt without the line number: public class ConsoleHandler extends Handler { private static final String SEVERE = "SEVERE"; private static final String DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss"; @Override public void publish(LogRecord record...
On my team we have a logging standard, and for the most part the Logger.log(Level, String, [Throwable]) methods works fine (it gives us automatic timestamp, class name, method name, message, and throwable information in the log). However, we have an additional identifier we log, and it's part of our standard (we use it to help monitor the logs). My problem is that I want to be able to eas...
I want to create the log file per request in bellow format using java util logging. YYYYMMDD_HHMMSS.log Anybody please let me know how can I achieve this using java util logging?
We are using glassfish as our application server. We want to log messages separately. For example if the log from xxx.company.xxx.service package, the log file is named as service.log, and if the log from xxx.company.xxx.dao, the log file is named as dao.log. Right now, all the log message are printed to server.log file which is the glassfish server log file. I know glassfish is using java.u...
My goal with this was to make it so that all Level.WARNING and higher LogRecords sent to Bukkit's Logger were sent to a log file that I've specified, as well as the console (as per usual). I've seen a few web pages showing examples of having multiple handlers for a single Logger and couldn't see how my code differed. I've been messing around with it for a while and can't seem to figure out what...
I am using general java.util.logging.Logger with the following initialization line: private static final Logger _log = Logger.getLogger(Login.class.getName()); Then I use it like this (just an example): _log.log(Level.FINE, "Session id: {0}.", session.getId()); In the log sometimes I can see the following: 24-Nov-2014 17:26:13.692 FINE [http-nio-80-exec-1] null.null Session id: 18BD6...
I like to intercept some (the most important) log messages and display them inside the GUI or check if any errors where logged. Normally I use java.util.logging and here the java.util.logging.Handler with and java.util.logging.Formatter. However the current project uses Log4J (2.x) and there every feature has different names and seems to be at least four times as complex. Can anybody give me ...
I'm trying to figure out how to use the java.util.logging features. All of the tutorials show how to log to a log file from the main class, but I cannot figure out how I can log to one file in various classes. I have a web service and a web service client and I'd like to be able to log errors on the web service while using the web service client. I tried creating a logger class but I ended...
I have 2 FileHandlers that write out to two separate files, and the amount of I/O occurring is slowing down my application quite a bit: I've decided to have the FileHandlers run on separate threads. As they are on separate threads, I needed a concept of a "queue", so that these separate threads can poll this queue and print out any incoming messages. I've preformatted messages so that any arg...
I am using log.properties to configure logging for a Java app. Each class gets its own logger named after itself (e.g. com.company.program.ClassX). I want to set a custom formatter for just one log, and leave the handler with the SimpleFormatter. Is this possible? I am not interested in using log4j or another of the other logging suites. I am well aware of them. Nor am I interested in configu...
  /*
   * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 
 
 package java.util.logging;
 
A Handler object takes log messages from a Logger and exports them. It might for example, write them to a console or write them to a file, or send them to a network logging service, or forward them to an OS log, or whatever.

A Handler can be disabled by doing a setLevel(Level.OFF) and can be re-enabled by doing a setLevel with an appropriate level.

Handler classes typically use LogManager properties to set default values for the Handler's Filter, Formatter, and Level. See the specific documentation for each concrete Handler class.

Since:
1.4
 
 
 public abstract class Handler {
     private static final int offValue = ..intValue();
     private LogManager manager = LogManager.getLogManager();
     private Filter filter;
     private Formatter formatter;
     private Level logLevel = .;
     private ErrorManager errorManager = new ErrorManager();
     private String encoding;
 
     // Package private support for security checking.  When sealed
     // is true, we access check updates to the class.
     boolean sealed = true;

    
Default constructor. The resulting Handler has a log level of Level.ALL, no Formatter, and no Filter. A default ErrorManager instance is installed as the ErrorManager.
 
     protected Handler() {
     }

    
Publish a LogRecord.

The logging request was made initially to a Logger object, which initialized the LogRecord and forwarded it here.

The Handler is responsible for formatting the message, when and if necessary. The formatting should include localization.

Parameters:
record description of the log event. A null record is silently ignored and is not published
 
     public abstract void publish(LogRecord record);

    
Flush any buffered output.
 
     public abstract void flush();

    
Close the Handler and free all associated resources.

The close method will perform a flush and then close the Handler. After close has been called this Handler should no longer be used. Method calls may either be silently ignored or may throw runtime exceptions.

Throws:
java.lang.SecurityException if a security manager exists and if the caller does not have LoggingPermission("control").
 
    public abstract void close() throws SecurityException;

    
Set a Formatter. This Formatter will be used to format LogRecords for this Handler.

Some Handlers may not use Formatters, in which case the Formatter will be remembered, but not used.

Parameters:
newFormatter the Formatter to use (may not be null)
Throws:
java.lang.SecurityException if a security manager exists and if the caller does not have LoggingPermission("control").
    public void setFormatter(Formatter newFormatterthrows SecurityException {
        checkPermission();
        // Check for a null pointer:
        newFormatter.getClass();
         = newFormatter;
    }

    
Return the Formatter for this Handler.

Returns:
the Formatter (may be null).
    public Formatter getFormatter() {
        return ;
    }

    
Set the character encoding used by this Handler.

The encoding should be set before any LogRecords are written to the Handler.

Parameters:
encoding The name of a supported character encoding. May be null, to indicate the default platform encoding.
Throws:
java.lang.SecurityException if a security manager exists and if the caller does not have LoggingPermission("control").
java.io.UnsupportedEncodingException if the named encoding is not supported.
    public void setEncoding(String encoding)
                        throws SecurityExceptionjava.io.UnsupportedEncodingException {
        checkPermission();
        if (encoding != null) {
            try {
                if(!java.nio.charset.Charset.isSupported(encoding)) {
                    throw new UnsupportedEncodingException(encoding);
                }
            } catch (java.nio.charset.IllegalCharsetNameException e) {
                throw new UnsupportedEncodingException(encoding);
            }
        }
        this. = encoding;
    }

    
Return the character encoding for this Handler.

Returns:
The encoding name. May be null, which indicates the default encoding should be used.
    public String getEncoding() {
        return ;
    }

    
Set a Filter to control output on this Handler.

For each call of publish the Handler will call this Filter (if it is non-null) to check if the LogRecord should be published or discarded.

Parameters:
newFilter a Filter object (may be null)
Throws:
java.lang.SecurityException if a security manager exists and if the caller does not have LoggingPermission("control").
    public void setFilter(Filter newFilterthrows SecurityException {
        checkPermission();
         = newFilter;
    }

    
Get the current Filter for this Handler.

Returns:
a Filter object (may be null)
    public Filter getFilter() {
        return ;
    }

    
Define an ErrorManager for this Handler.

The ErrorManager's "error" method will be invoked if any errors occur while using this Handler.

Parameters:
em the new ErrorManager
Throws:
java.lang.SecurityException if a security manager exists and if the caller does not have LoggingPermission("control").
    public void setErrorManager(ErrorManager em) {
        checkPermission();
        if (em == null) {
           throw new NullPointerException();
        }
         = em;
    }

    
Retrieves the ErrorManager for this Handler.

Throws:
java.lang.SecurityException if a security manager exists and if the caller does not have LoggingPermission("control").
    public ErrorManager getErrorManager() {
        checkPermission();
        return ;
    }

   
Protected convenience method to report an error to this Handler's ErrorManager. Note that this method retrieves and uses the ErrorManager without doing a security check. It can therefore be used in environments where the caller may be non-privileged.

Parameters:
msg a descriptive string (may be null)
ex an exception (may be null)
code an error code defined in ErrorManager
    protected void reportError(String msgException exint code) {
        try {
            .error(msgexcode);
        } catch (Exception ex2) {
            ..println("Handler.reportError caught:");
            ex2.printStackTrace();
        }
    }

    
Set the log level specifying which message levels will be logged by this Handler. Message levels lower than this value will be discarded.

The intention is to allow developers to turn on voluminous logging, but to limit the messages that are sent to certain Handlers.

Parameters:
newLevel the new value for the log level
Throws:
java.lang.SecurityException if a security manager exists and if the caller does not have LoggingPermission("control").
    public synchronized void setLevel(Level newLevelthrows SecurityException {
        if (newLevel == null) {
            throw new NullPointerException();
        }
        checkPermission();
         = newLevel;
    }

    
Get the log level specifying which messages will be logged by this Handler. Message levels lower than this level will be discarded.

Returns:
the level of messages being logged.
    public synchronized Level getLevel() {
        return ;
    }

    
Check if this Handler would actually log a given LogRecord.

This method checks if the LogRecord has an appropriate Level and whether it satisfies any Filter. It also may make other Handler specific checks that might prevent a handler from logging the LogRecord. It will return false if the LogRecord is Null.

Parameters:
record a LogRecord
Returns:
true if the LogRecord would be logged.
    public boolean isLoggable(LogRecord record) {
        int levelValue = getLevel().intValue();
        if (record.getLevel().intValue() < levelValue || levelValue == ) {
            return false;
        }
        Filter filter = getFilter();
        if (filter == null) {
            return true;
        }
        return filter.isLoggable(record);
    }
    // Package-private support method for security checks.
    // If "sealed" is true, we check that the caller has
    // appropriate security privileges to update Handler
    // state and if not throw a SecurityException.
    void checkPermission() throws SecurityException {
        if () {
            .checkPermission();
        }
    }
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