using the logging module, you first need to get an instance of the logger class called the Logger (logger). Each logger has a name, and the logging module manages these loggers by name, and the two loggers can be identified by a hierarchy of namespaces (each instance have a name, and they is conceptually Arranged in a
This article does not teach you a full understanding of log4net. It just wants to teach you how to use log4net1. Introduce the log4net. dll component.2. Create a configuration fileEither method is in Web. config or app. config.Add the following configuration sectionIn the configuration section above, you can use the copy function.
Add the definition of log4net configuration content, followed by the above content definition in the config file. The following is an example:
If you are too lazy to w
Log4cplus is excellent in many aspects, but it is uncomfortable to use it in some places. I'm not happy with it until I continue to talk about it.I will mention it a little and continue to introduce the knowledge about threads and sockets.### Some improvements ###1. The implementation mechanism of user-defined loglevel is not open enoughIn article 5, I have introduced how to implement custom loglevel. To achieve better results, I even need to change log4cplus.Source code. :(2. The mechanism for
introduction logging module is a python built-in standard module, mainly used for output log, you can set the level of output logs, log save path, log files and rollback, etc. It can be said that the logging module consists mainly of 4 parts: *logger Logger , which provides interfaces that application code can use directly NBSP;NBSP; *handler processor , sends log records generated by the
in the Lua script This is a little troublesome. However, I wrapped a luaplushelper. h file, which can easily complete this job. Its implementation is also very simple. You can obtain from the source code how to use pure luaplus to implement the same function. However, there is still a restriction that cannot be solved: Virtual member functions cannot be used. However, considering that we only call the C ++ function in Lua, it is not necessary to import C ++ to Lua perfectly. This restriction
, considering that we only call the C ++ function in Lua, it is not necessary to import C ++ to Lua perfectly. This restriction is completely acceptable.In addition, class member variables cannot be directly accessed in Lua, and can be accessed through class member functions (such as setvalue/getvalue ).
// The following is a simple C ++ class:Class Logger{Public:Void logmember (const char * message){Printf ("in member function: % s \ n", message );}
This article is transferred from Kenby's blog, more comprehensive move, turn to stay for later use.http://kenby.iteye.com/blog/1162698First, starting from a usage scenarioImportLogging#Create a loggerLogger = Logging.getlogger ('MyLogger') Logger.setlevel (logging. DEBUG)#create a handler to write to the log fileFH = logging. Filehandler ('Test.log') Fh.setlevel (logging. DEBUG)#create another handler for output to the consoleCH =logging. Streamhandler () Ch.setlevel (logging. DEBUG)#define the
3. Complete Solution
Sunny developers decided to use the factory method mode to design the logger. Its basic structure is shown in 3:
Figure 3 log recorder Structure
In Figure 3, the logger interface acts as an abstract product. Its sub-classes filelogger and databaselogger act as specific products, the loggerfactory interface acts as an abstract factory, and its sub-classes fileloggerfactory and databasel
Log4cplus has three main components:
Layouts
Appenders
Loggers
These three type of components found the basic of the log4cplus framework.
Here is a simplified UML Graph Modeling strating the relationships of those classes:
(1) A "layout" Class determines the format of the log message (How do we print out the message ).And log4cplus comes with three layout class:
Simplelayout
Ttcclayout
Patternlayout
These classes accept log event and emits formatt
A movie about dreams and courage, love and forgiveness, life and dignity, adapted from the book burning ropes: boxing stories.
Starring:
Flint Eastwood-frankky DengMorgan Freeman-ai Chen dupresresHillary Swank-Maggie
After reading it at that time, I thought of the lyrics of "Life is like a summer flower:
I came from afar, and you are also here.
I am crazy about her.
I am this dazzling moment, it is the flame across the sky.
I am desperate to see you, and I will never come back agai
Simplifies the glog, only retains the function of writing log files, only to rewrite the Linux version, the win version is not rewritten, you can useLog (INFO) Log_if (info,condition) You can also call the Log Class Logger::getinstance () directly. Error and other ways to write a logCall Initlogging (Argv[0],info, "./log/test") when initializing;The first parameter is the path, the second parameter is the lowest log level, and the third parameter repr
The benefits of Log4j 2 will not be discussed with everyone. If you search for 2, it means you have some knowledge about it and want to use it, so you can get started directly here.
1. Download log4j 2 from the official website.To import the jar package, you only need to import the following two jar packages (xx is a messy version ):
Log4j-core-xx.jar
Log4j-api-xx.jar
2. Import to your project:This will not be said.
3. Start Using:
We know that to use log4j to record logs in a class, we only
20145301 "Java Program design" Eighth Week study summary textbook Learning content Summary 15th part-General API Common API
LOG: Log information security is significant, audit, forensics, intrusion detection, etc. will use the log message
Logger Java.util.logging package provides a log function related classes and interfaces, the starting point for using the log is the logger class, the
how the underlying file system is actually performed.Second, the general API1. log API
Java.util.logging package provides a log function related classes and interfaces, the starting point for using the log is the logger class, the logger class's constructor is labeled protected, not java.util.logging the same package class cannot be created directly with new, will be allowed to use
solve the above problems, you need to understand a few of the more important concepts,Logger,Handler,Formatter,FilterA few important concepts
The Logger recorder exposes an interface that the application code can use directly.
Handler processor that sends (logger-generated) log records to the appropriate destination.
Filter filters provide bette
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Before you solve the above problems, you need to understand a few of the more important concepts,Logger,Handler,Formatter,Filter3. A few important concepts
The Logger recorder exposes an interface that the application code can use directly.
Handler processor that sends (logger-generated) log records to the appropriate destination.
Fil
Do not use the form of service, directly in/etc/rc. add a script for local: su-oracle-c "/home/oracle/product/10.2.0/db_1/bin/dbstart". Change ORACLE_HOME_LISTNER of dbstart to $ ORACLE_HOME.Restart the system. The oracle instance is not started. Check the startup log and find that:Oct 17 21:05:23 simpleit logger: Waiting for Oracle CSS service to be available before startingOct 17 21:05:23 simpleit logger:
Logging Module Introduction
Python's logging module provides a common logging system that can be easily used by third-party modules or applications. This module provides different log levels and can record logs in different ways, such as files, HTTP get/post,smtp,socket, etc., and can even implement specific logging methods on their own.The logging module is the same as the log4j mechanism, but the specific implementation details are different. module provides
1, what is log4j?
Log4j is an open source project for Apache, by using log4j, we can control the destination of log information delivery is console, file, GUI component, even interface server, NT Event recorder, UNIX syslog daemon, etc. We can also control the output format of each log, and by defining the level of each log information, we can control the log generation process more carefully. Most interesting of all, these can be configured flexibly with a single configuration file without the
Java.util.logging.Logger Use detailed Java.util.logging.Logger is not something new, 1.4, but because of the existence of log4j, this logger has been silent, in fact, in some of the test code, the JDK's own logger than log4j more convenient. First, create the Logger object static Logger GetLogger (String name)
Finds o
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