[英]Enable debug logging in maven jetty 7 plugin
I'm running a java webapp with a simple mvn jetty:run
, using the latest jetty plugin, but I can't seem to find a way to tell jetty to output DEBUG messages to console (for the embedded jetty instance, not the plugin itself). 我正在运行一个带有简单
mvn jetty:run
的java webapp mvn jetty:run
,使用最新的jetty插件,但我似乎找不到告诉jetty将DEBUG消息输出到控制台的方法(对于嵌入式jetty实例,而不是插件本身)。 It's currently outputting only WARN and INFO messages. 它目前只输出WARN和INFO消息。 I've tried setting
-DDEBUG
and -DVERBOSE
, but they don't do anything. 我尝试过设置
-DDEBUG
和-DVERBOSE
,但他们什么也没做。 I've already had a look at the documentation , but it doesn't seem to cover this. 我已经看过文档 ,但它似乎没有涵盖这一点。
Update: OK, I finally got things working and here is what I did. 更新:好的,我终于把事情搞定了,这就是我所做的。
My understanding is that Jetty 7 doesn't have any dependencies on a particular logging framework, even for the JSP engine since Jetty 7 uses the JSP 2.1 engine. 我的理解是Jetty 7对特定的日志框架没有任何依赖性,即使对于JSP引擎也是如此,因为Jetty 7使用JSP 2.1引擎。 So you can use any logging framework.
所以你可以使用任何日志框架。 Here I will use logback.
在这里,我将使用logback。
First add logback-classic
as dependency in the plugin and set the logback.configurationFile
system property to point on a configuration file: 首先在插件中添加
logback-classic
作为依赖项,并将logback.configurationFile
系统属性设置为指向配置文件:
<project>
...
<build>
...
<plugins>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>7.0.0.pre5</version>
<configuration>
<systemProperties>
<systemProperty>
<name>logback.configurationFile</name>
<value>./src/etc/logback.xml</value>
</systemProperty>
</systemProperties>
</configuration>
<dependencies>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>0.9.15</version>
</dependency>
</dependencies>
</plugin>
...
</plugins>
</build>
...
</project>
Then add a src/etc/logback.xml
configuration file. 然后添加一个
src/etc/logback.xml
配置文件。 Below a minimal configuration: 低于最小配置:
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>
<root level="debug">
<appender-ref ref="STDOUT"/>
</root>
</configuration>
With this setup, jetty will output DEBUG messages: 通过此设置,jetty将输出DEBUG消息:
$ mvn jetty:run ... 00:31:33.089 [main] DEBUG org.mortbay.log - starting DefaultHandler@145e5a6 00:31:33.089 [main] DEBUG org.mortbay.log - started DefaultHandler@145e5a6 00:31:33.105 [main] DEBUG org.mortbay.log - starting RequestLogHandler@1e80761 00:31:33.106 [main] DEBUG org.mortbay.log - started RequestLogHandler@1e80761 00:31:33.106 [main] DEBUG org.mortbay.log - starting HandlerCollection@1485542 00:31:33.106 [main] DEBUG org.mortbay.log - started HandlerCollection@1485542 00:31:33.106 [main] DEBUG org.mortbay.log - starting org.mortbay.jetty.Server@a010ba 00:31:33.174 [main] DEBUG org.mortbay.log - started org.mortbay.jetty.nio.SelectChannelConnector$1@ee21f5 00:31:33.216 [main] INFO org.mortbay.log - Started SelectChannelConnector@0.0.0.0:8080 00:31:33.217 [main] DEBUG org.mortbay.log - started SelectChannelConnector@0.0.0.0:8080 00:31:33.217 [main] DEBUG org.mortbay.log - started org.mortbay.jetty.Server@a010ba [INFO] Started Jetty Server
Resources: 资源:
To extend Pascal's answer, this is how it works with log4j: 为了扩展Pascal的答案,这就是log4j的工作原理:
<project>
...
<build>
...
<plugins>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>7.0.0.pre5</version>
<configuration>
<systemProperties>
<systemProperty>
<name>log4j.configurationFile</name>
<value>file:${project.basedir}/src/test/resources/log4j.properties</value>
</systemProperty>
</systemProperties>
</configuration>
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.1</version>
</dependency>
</dependencies>
</plugin>
...
</plugins>
</build>
...
</project>
This is your ${project.basedir}/src/test/resources/log4j.properties
: 这是你的
${project.basedir}/src/test/resources/log4j.properties
:
log4j.rootLogger=INFO, CONSOLE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern = [%-5p] %c: %m\n
log4j.logger.org.eclipse.jetty.util.log=INFO
Additional resources: 其他资源:
你也可以这样做“mvn -X jetty:run”
To extend Pascal's and yegor256's answer, this is how it works with SLF4J Simple logger
(which is the most easiest option since you just need to add a dependency to slf4j-simple
): 为了扩展Pascal和yegor256的答案,这就是它如何与
SLF4J Simple logger
(这是最简单的选项,因为你只需要为slf4j-simple
添加一个依赖slf4j-simple
):
<project>
...
<build>
...
<plugins>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>7.0.0.pre5</version>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.5</version>
</dependency>
</dependencies>
</plugin>
...
</plugins>
</build>
...
</project>
It is possible to configure the SLF4J Logger directly from Maven pom. 可以直接从Maven pom配置SLF4J Logger。 Defaults are described in http://www.slf4j.org/apidocs/org/slf4j/impl/SimpleLogger.html )
默认值在http://www.slf4j.org/apidocs/org/slf4j/impl/SimpleLogger.html中描述
For instance, log into a file /tmp/output.log
with higher debug level ( TRACE
): 例如,登录到具有更高调试级别(
TRACE
)的文件/tmp/output.log
:
<configuration>
<systemProperties>
<systemProperty>
<name>org.slf4j.simpleLogger.logFile</name>
<value>/tmp/output.log</value>
</systemProperty>
<systemProperty>
<name>org.slf4j.simpleLogger.defaultLogLevel</name>
<value>trace</value>
</systemProperty>
</systemProperties>
</configuration>
I find this solution more convenient 我发现这个解决方案更方便
<resources>
<resource>
<directory>${project.basedir}/src/main/resources</directory>
<targetPath>${project.build.outputDirectory}</targetPath>
<includes>
<include>log4j.properties</include>
</includes>
</resource>
</resources>
also don't forget paste 也不要忘记粘贴
<overwrite>true</overwrite>
for resources plugin 对于资源插件
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