I am using Struts2,hibernate web application. On that file i used following dependency for log4j in pom.xml
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.9</version>
</dependency>
In my Actionclass i used the following code to write log file:
public class loginAction extends action{
static Logger log = Logger.getLogger(com.action.LoginAction.class);
public String checklogin(){
log.debug("Debug Message(LOGIN)!");
log.info("Info Message(LOGIN)!");
log.warn("Warn Message(LOGIN)!");
log.error("Error Message(LOGIN)!");
log.fatal("Fatal Message(LOGIN)!");
//my coding for checking logged status.
}
}
I have placed log4j.properties file under WEB-INF/classes folder with the following code,
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C\:\\logfile.log
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
# Root logger option
log4j.rootLogger=debug, file
When i run and deploy this application on server the property file is placed in correct path. but after running statement in action class nothing get affect from log4j.properties file. I dont know where i did wrong.
So anyone please help me to find this issue. Thanks in Advance.
Related
I'm trying to use log4j to print messages from a standalone Java app to the console in Eclipse, but it's not printing anything. Here's the code:
Declaration:
static Logger logger = LoggerFactory.getLogger(AnalyticsBackupUtil.class);
Print statements:
public static void main(String args[]) {
String log4jConfigFile = System.getProperty("user.dir") + File.separator + "log4j.properties";
PropertyConfigurator.configure(log4jConfigFile);
logger.debug("this is a debug log message");
logger.info("this is a information log message");
logger.warn("this is a warning log message");
logger.error("this is an error log message");
...
properties file:
log4j.rootLogger=DEBUG, Appender1,Appender2
log4j.appender.Appender1=org.apache.log4j.ConsoleAppender
log4j.appender.Appender1.layout=org.apache.log4j.PatternLayout
log4j.appender.Appender1.layout.ConversionPattern=%-7p %d [%t] %c %x - %m%n
log4j.appender.Appender2=org.apache.log4j.FileAppender
log4j.appender.Appender2.File=applog.txt
log4j.appender.Appender2.layout=org.apache.log4j.PatternLayout
log4j.appender.Appender2.layout.ConversionPattern=%-7p %d [%t] %c %x - %m%n
Maven:
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
Any idea what the problem might be?
Log4j 1.x does not have a method LoggerFactory.getLogger. You are probably using org.slf4j.Logger and org.slf4j.LoggerFactory.
If this is intentional (using a logging API like SLF4j allows to easily change the backend), you need to add the slf4j-log4j12 binding to the classpath.
I a new user of Eclipse. I put log4j.properties into src-folder. For some reason my src-folder has "default package" and I don't know how to put log4j.properties inside of it.
As a consiquence, I have this kind of exception:
log4j:ERROR Could not read configuration file [log4j.properties].
java.io.FileNotFoundException: log4j.properties (The system cannot find the file specified)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:372)
at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:403)
at HelloWorld.main(HelloWorld.java:9)
log4j:ERROR Ignoring configuration file [log4j.properties].
Moving log4j.properties into src/main/resources does not solve the prolem.
Here is my code:
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
public class HelloWorld {
static final Logger logger = Logger.getLogger(HelloWorld.class);
public static void main(String[] args) {
PropertyConfigurator.configure("log4j.properties");
logger.debug("Sample debug message");
logger.info("Sample info message");
logger.warn("Sample warn message");
logger.error("Sample error message");
logger.fatal("Sample fatal message");
}
}
log4j.properties file:
# Root logger option
log4j.rootLogger=INFO, file, errorfile
# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
#Redirect to Tomcat logs folder
#log4j.appender.file.File=${catalina.home}/logs/logging.log
log4j.appender.file.File=C:\\log\\logging.log
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
log4j.appender.errorfile=org.apache.log4j.RollingFileAppender
log4j.appender.errorfile.Threshold=ERROR
log4j.appender.errorfile.File=C:\\log\\errorlogging.log
log4j.appender.errorfile.MaxFileSize=10MB
log4j.appender.errorfile.MaxBackupIndex=10
log4j.appender.errorfile.layout=org.apache.log4j.PatternLayout
log4j.appender.errorfile.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
How to solve this problem?
You have to add the log4j.properties file in the following location.
For main code base -> src/main/resources
For test code base -> src/test/resources
Besides, if you are using Maven, add the below code in pom.xml in the build section.
<resources>
<resource>
<directory>src/main/resources</directory>
<targetPath>${project.build.directory}</targetPath>
<includes>
<include>log4j.properties</include>
</includes>
</resource>
</resources>
After doing all the above, refresh the project in Eclipse. Build the maven project with the command mvn clean package or mvn clean install. Inside the project, you should be able to see the log4j.properties file inside build/classes directory.
O must put on src/main/resources folder.
https://maven.apache.org/guides/introduction/introduction-to-the-standard-directory-layout.html
I am trying to add log4j to my web application to record the exchange between the server and the client so I added the dependency in my pom.xml:
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
and I created the log4j.proporties:
# Root logger option
log4j.rootLogger=INFO, file
# Direct log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
#Redirect to Tomcat logs folder
#log4j.appender.file.File=${catalina.home}/logs/logging.log
log4j.appender.file.File=C:\\test.log
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%
and the following is my code :
static final Logger logger = Logger.getLogger(hellologger.class);
public static void main(String[] args) {
String log4JPropertyFile = "C:\\Users\\xxxx\\Desktop\\log4j.properties";
Properties p = new Properties();
try {
p.load(new FileInputStream(log4JPropertyFile));
PropertyConfigurator.configure(p);
logger.info("Wow! I'm configured!");
} catch (IOException e) {
}
}
But finally I got this error :
Infos: org.osgi.framework.BundleException: Unresolved constraint in bundle com.mycompany.webclient [329]: Unable to resolve 329.7: missing requirement [329.7] osgi.wiring.package; (&(osgi.wiring.package=org.apache.log4j)(version>=1.2.0)(!(version>=2.0.0)))
at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:3974)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2037)
at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:955)
at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:1175)
at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:1153)
at org.apache.felix.fileinstall.internal.DirectoryWatcher.processAllBundles(DirectoryWatcher.java:1146)
at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:456)
at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:263)
any idea how to fix this problem ?!!!!
You can go through this tutorial on log4j .
The properties file and pom.xml files are explained properly .
logs generated are like this :
2014-07-02 20:52:39 DEBUG HelloExample:19 - This is debug : mkyong
2014-07-02 20:52:39 INFO HelloExample:23 - This is info : mkyong
2014-07-02 20:52:39 WARN HelloExample:26 - This is warn : mkyong
2014-07-02 20:52:39 ERROR HelloExample:27 - This is error : mkyong
2014-07-02 20:52:39 FATAL HelloExample:28 - This is fatal : mkyong
I am working on a small RCP project which has Maven nature and now I wish to add log4j dependencies with that.
For that purpose what I did was :
Added log4j.properties under bin folder inside the project. bin is the folder where all the class files are getting generated. The file looks like this:
# Root logger option
log4j.rootLogger=DEBUG, stdout, file
# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
# Redirect log messages to a log file, support file rolling.
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\Srijani\\Personal Workspace\\RCP\\EditorApp\\log\\Application.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
Added this dependency in pom.xml
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
In java code I wrote like this:
import org.apache.log4j.Logger;
import com.app.editor.constants.Constants;
public class DatabaseConnection {
final static Logger logger = Logger.getLogger(DatabaseConnection.class);
}
This code does not creata any problem while compiling. But, while running the code, I got this error:
!ENTRY org.eclipse.e4.ui.workbench 4 0 2016-01-13 13:50:35.397
!MESSAGE Unable to create class 'org.eclipse.ui.internal.e4.compatibility.CompatibilityView' from bundle '55'
!STACK 0
org.eclipse.e4.core.di.InjectionException: java.lang.NoClassDefFoundError: org/apache/log4j/Logger
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:62)
Note: I did not add anything to MANIFEST.MF and build.properties.
Please help!
Thanks
Update: Got the issue but not sure how to solve it. When I am downloading the jar manually and set it in the class path, I am able to use log4j in Eclipse RCP. But, when I am trying download it via Maven, it is not working. Any idea why this is happening?
If you use Maven in combination with Eclipse RCP you should consider using Tycho[1]. Tycho uses the MANIFEST-first approach, so that you don't need to edit the pom-files.
In addition you should put your log4j.properties into a fragment with the log4j-bundle as host-plugin.
[1] https://eclipse.org/tycho/
I hope in this website explained clearly. It will helps to you.
http://www.mkyong.com/logging/log4j-hello-world-example/
My sincere suggestion is, before implement in project try to create one sample example. If it success, you can apply same into project.
In my pom.xml, I've added a dependency for using Log4j
pom.xml
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.9</version>
</dependency>
Then, I executed the following command
mvn clean install
After this command, I notice that the log4j-1.2.9.jar is well added in my lib directory itself in the target directory
Then, I started the google app engine server with the following command in my project :
appengine:devserver
And my log4j.properties in src/main/resources
# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
After, by opening the jar file in winzip, I noticed that the Logger.class was in org/apache/log4j directory, so, when I tried to import the Logger class in a java file, it didn't detect the package 'log4j'.
Do you have any solutions ?
Thank you