slf4j

日志jar包冲突报错：Class path contains multiple SLF4J bindings

由 和自甴很熟 提交于 2019-12-18 05:39:26
　　问题现象：tomcat启动卡死，报错日志如下： 十一月 07, 2017 8:35:45 下午 org.apache.catalina.core.ApplicationContext log 信息: Initializing Spring root WebApplicationContext SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/E:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/ms-notify/WEB-INF/lib/log4j-slf4j-impl-2.9.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/E:/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/ms-notify/WEB-INF/lib/slf4j-log4j12-1.7.2.jar!/org/slf4j/impl/StaticLoggerBinder.class

Can we use all features of log4j2 if we use it along with slf4j api?

由 邮差的信 提交于 2019-12-17 23:36:48
问题 We have migrated all our code to use the slf4 API to use generic APIs, however now we are thinking of upgrading from log4j 1.x to log4j 2.x. Will we be able to use all the features of log4j2 if we use the slf4j API and log4j2 as the implementation? 回答1: The Log4j2 API is richer than the SLF4J API, and many Log4j2 API features are not accessible via SLF4J. See below for details. Features of the Log4j2 implementation, like Async Loggers, Lookups, Filters, Layouts and Appenders are controlled

Disable the log from specific class/jar via logback.xml

由 眉间皱痕 提交于 2019-12-17 18:37:56
问题 In my application I use Java, Hibernate. Logging : I use logback.xml Can anyone suggest if there is a way to disable the logs from the below specific class from Hibernate jar. LOGGER to be removed from the specific class : ERROR o.h.e.jdbc.spi.SqlExceptionHelper logback.xml: <configuration> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <layout class="ch.qos.logback.classic.PatternLayout"> <Pattern> %d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n <

slf4j version conflict while building with Maven

由 拈花ヽ惹草 提交于 2019-12-17 18:28:14
问题 I realised that one of my projects uses slf4j 1.5.8 and Hibernate uses slf4j 1.6. While building with Maven it downloads both jars but I guess the class files of 1.5.8 are used. So, when I run the program i get following error: SLF4J: The requested version 1.5.8 by your slf4j binding is not compatible with [1.6] In pom.xml I have put <dependencyManagement> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.1</version> </dependency> </dependencyManagement

Best practices for using Markers in SLF4J/Logback

由 送分小仙女□ 提交于 2019-12-17 17:18:03
问题 We are using SLF4J+Logback combination at our project for a while now and are quite happy with it, but our logging strategy is fairly simple, using straightforward class based loggers and no fancy stuff like MDC or Markers. What I want to know is if anybody in the community actually uses these features and how they are used to improve logging/filtering. I am specially interested in where, why and how would one use [1] Markers for logging. They strike me as a pretty neat feature for adding

Implement Custom Logger with slf4j

由 妖精的绣舞 提交于 2019-12-17 15:46:47
问题 I want to implement a Custom logger which logs all log entries to a Database. Currently my app logs this way (slf4j and log4j binding): private static final Logger logger = LoggerFactory.getLogger( MyClass.class ); I'm not sure how to proceed. My Idea is to implement a Custom Logging binding through implementing the org.slf4j.Logger Interface What would be the next steps? My target is to not change the current code Links I considered: Java custom logger: logging standards or/and best

How to intercept SLF4J (with logback) logging via a JUnit test?

由 主宰稳场 提交于 2019-12-17 15:36:07
问题 Is it possible to somehow intercept the logging (SLF4J + logback) and get an InputStream (or something else that is readable) via a JUnit test case...? 回答1: You can create a custom appender public class TestAppender extends AppenderBase<LoggingEvent> { static List<LoggingEvent> events = new ArrayList<>(); @Override protected void append(LoggingEvent e) { events.add(e); } } and configure logback-test.xml to use it. Now we can check logging events from our test: @Test public void test() { ...

Mocking Logger and LoggerFactory with PowerMock and Mockito

由 妖精的绣舞 提交于 2019-12-17 15:32:14
问题 I have the following Logger I want to mock out, but to validate log entries are getting called, not for the content. private static Logger logger = LoggerFactory.getLogger(GoodbyeController.class); I want to Mock ANY class that is used for LoggerFactory.getLogger() but I could not find out how to do that. This is what I ended up with so far: @Before public void performBeforeEachTest() { PowerMockito.mockStatic(LoggerFactory.class); when(LoggerFactory.getLogger(GoodbyeController.class)).

One logfile per run with log4j

由 回眸只為那壹抹淺笑 提交于 2019-12-17 12:19:36
问题 How do you configure log4j.properties to have exactly one logfile per run of an app. I've read that you should use a timestamp in the filename but that will create many files per run as time goes by. I tried DailyRollingFileAppender and RollingFileAppender but can't find a way to configure exctly one log per run. The log should not be broken into multiple logs and it shouldn't be truncated and files of old runs should be preserved. Each class has a static org.slf4j.Logger for it's own class

What is the best way to unit-test SLF4J log messages?

由 馋奶兔 提交于 2019-12-17 11:23:12
问题 I'm using slf4j and I want to unit test my code to make sure that warn/error log messages are generated under certain conditions. I'd rather these be strict unit tests, so I'd prefer not to have to pull up logging configuration from a file in order to test that the log messages are generated. The mocking framework I'm using is Mockito. 回答1: I think you could solve your problem with a custom appender. Create a test appender which implements the org.apache.log4j.Appender , and set your appender
订阅 slf4j