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2020/2/25-stage first edit ccb_warlock
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Because of the time before the busy business development projects for the use log4net has been "used", just look at the results to the console when debugging in a while there is no specific mechanism parameters and configuration files get to the bottom.
Happened this time the project schedule was not so nervous, I also have time to complete part of the framework of the log output, the idea of holding "the easier issues first," I do not go first to achieve such a system similar elasticsearch to write the log log first starting implement written to a local file.
Originally written winform when vaguely remember mostly to write to a log file by way of data streams, which also consider whether the log file exists, exceeds the size, how to do so on thread safety, after tests found log4net function package is really very simple.
First, add a profile log4net.config
PS. Of course, the configuration file can not be that name, I'm here for the convenience of direct use log4net.config
# Add the following to the log4net.config
<?xml version="1.0" encoding="utf-8"?> <log4net> <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender"> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger - %message %newline" /> </layout> </appender> <appender name="DebugRollingFileAppender" type="log4net.Appender.RollingFileAppender"> <file value="/var/tmp/log/myApp/debug/" /> <appendToFile value="true" /> <rollingStyle value="Composite" /> <staticLogFileName value="false" /> <datePattern value="yyyy-MM-dd'.txt'" /> <maxSizeRollBackups value="10" /> <maximumFileSize value="1MB" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender> <appender name="ErrorRollingFileAppender" type="log4net.Appender.RollingFileAppender"> <file value="/var/tmp/log/myApp/error/" /> <appendToFile value="true" /> <rollingStyle value="Composite" /> <staticLogFileName value="false" /> <datePattern value="yyyy-MM-dd'.txt'" /> <maxSizeRollBackups value="10" /> <maximumFileSize value="1MB" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> <filter type="log4net.Filter.LevelRangeFilter"> <param name="LevelMin" value="ERROR" /> <param name="LevelMax" value="FATAL" /> </filter> </appender> <root> <level value="ALL" /> <appender-ref ref="ConsoleAppender" /> <appender-ref ref="DebugRollingFileAppender" /> <appender-ref ref="ErrorRollingFileAppender" /> </root> </log4net>
PS.
You can see, DebugRollingFileAppender ErrorRollingFileAppender is to achieve and write local files created configuration, followed by a detailed description of the parameters for which entries.
| Parameter | description | Value range |
| file | Path to the log file is located | |
| appendToFile | Write mode | true. Incremental write false. overwritten |
| rollingStyle | naming method | Date. Named by date Size. Named by file size Composite. Integrated date and file size to name |
| staticLogFileName | File name is variable | true. immutable (static) false. The variable |
| datePattern | Date format (used to control the scrolling cycle). Suffix .txt if desired, may be added '.txt' behind the content. | |
| maxSizeRollBackups | The maximum number of files within a rolling period | -1 indicates no limit to the number |
| maximumFileSize | The maximum space for each file. When the log file exceeds the limit, if the number of log files in the rolling period less than the maximum number of files, will create a new file. If equal to the maximum number of files, it will re-write restart from the first file in the rolling cycle |
|
| conversionPattern | Each log format | |
| filter | Filter (to set the type of recording depending on the log) |
Then separate out logging format described
<conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
| parameter | description | Logogram |
| %datetime | Generates a log record time | %d |
| %thread | Log records are generated thread ID | %t |
| %-5level | The log level | |
| %logger | The method of generating a class where the log (including assembly) | |
| %property | Attributes | |
| %message | Information log | %m |
| %newline | Wrap | %n |
| %L | The line number where the log file statement | |
| %F | The log file path statement where (including the file name) |
level: the lowest level of the log, according to the level corresponding to the log record as follows:
ALL DEBUG INFO WARN ERROR FATAL OFF
•All
•DEBUG •DEBUG
•INFO •INFO •INFO
•WARN •WARN •WARN •WARN
•ERROR •ERROR •ERROR •ERROR •ERROR
•FATAL •FATAL •FATAL •FATAL •FATAL •FATAL
•OFF •OFF •OFF •OFF •OFF •OFF •OFF
Second, add log4net in the project
My project is asp.net core .net core 2.2-based project created for the added log4net is implemented in program.cs, the specific code as follows:
using Microsoft.AspNetCore; using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Logging; namespace Api { public class Program { public static void Main(string[] args) { CreateWebHostBuilder(args).Build().Run(); } private static IWebHostBuilder CreateWebHostBuilder(string[] args) => WebHost.CreateDefaultBuilder(args) .ConfigureLogging((context, logging) => { logging.AddLog4Net(); }) .UseStartup<Startup>(); } }
接着后面的程序只要有log输出就会向指定的文件内写日志，例如我在定时任务中添加的日志输出：
using log4net; using Quartz; namespace Domain.Jobs { public class ServiceToken : IJob { private readonly ILog _log = LogManager.GetLogger(typeof(ServiceToken)); ······ public Task Execute(IJobExecutionContext context) { var now = DateTimeOffset.Now; _log.Debug($"{now:yyyy/MM/dd HH:mm:ss.fff}, 执行维护token的任务."); // todo return Task.CompletedTask; } } }
1.http://logging.apache.org/log4net/release/config-examples.html
2.https://stackoverflow.com/questions/8926409/log4net-hierarchy-and-logging-levels?r=SearchResults