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  • How do you log your Java?

    From [email protected]@21:1/5 to All on Mon Mar 20 06:31:45 2023
    Do you use log4j2 or something else?

    How do you redirect the catalina logs to a file? If I have log4j2.xml in the tomcat folder, it appears to be ignoring the log4j2.xml in the application folder.

    Do you use log4j2.xml? This appears to be the popular setup, but the last application I worked with had many different project for pieces of the one big application, so I put them all under one master project and had the spring framework call the API to
    configure on startup, seemed easier than using xml files especially if the sub-projects can share and would each need their own xml file.

    Do you use the static method at the start of each class Logger log = LoggerFactory.getLogger() or the @Log4j2 annotation, or is there another better way?

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  • From =?UTF-8?Q?Arne_Vajh=c3=b8j?=@21:1/5 to [email protected] on Mon Mar 20 10:11:21 2023
    On 3/20/2023 10:05 AM, [email protected] wrote:
    I believe the popularity ranking is:
    1) logback
    2) log4j 2.x
    3) jul
    4) log4j 1.x (obsolete, deprecated)

    What is logback? I've seen this and thought it was just an older version of the log4j.
    I haven't heard of a jul logging.

    https://logback.qos.ch/

    It is different from but similar to log4j.

    @Log4j2 annotation is a Lombok feature I believe, so only
    a possibility for those using Lombok.

    Is the annotation just a shorter version of that one line factory statement or is there another benefit?

    I don't use Lombok, but:

    https://projectlombok.org/api/lombok/extern/log4j/Log4j

    says:

    <quote>
    Example:

    @Log4j
    public class LogExample {
    }


    will generate:

    public class LogExample {
    private static final org.apache.log4j.Logger log = org.apache.log4j.Logger.getLogger(LogExample.class);
    }
    </quote>

    Arne

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  • From =?UTF-8?Q?Arne_Vajh=c3=b8j?=@21:1/5 to [email protected] on Mon Mar 20 09:59:05 2023
    On 3/20/2023 9:31 AM, [email protected] wrote:
    Do you use log4j2 or something else?

    How do you redirect the catalina logs to a file? If I have log4j2.xml
    in the tomcat folder, it appears to be ignoring the log4j2.xml in the application folder.

    Do you use log4j2.xml? This appears to be the popular setup, but the
    last application I worked with had many different project for pieces
    of the one big application, so I put them all under one master
    project and had the spring framework call the API to configure on
    startup, seemed easier than using xml files especially if the
    sub-projects can share and would each need their own xml file.

    Do you use the static method at the start of each class Logger log = LoggerFactory.getLogger() or the @Log4j2 annotation, or is there
    another better way?

    I believe the popularity ranking is:
    1) logback
    2) log4j 2.x
    3) jul
    4) log4j 1.x (obsolete, deprecated)

    The big benefit of configuration files over programmatic
    configuration is that it allows operations to change logging
    without requiring help from software engineering.

    @Log4j2 annotation is a Lombok feature I believe, so only
    a possibility for those using Lombok.

    Arne

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From [email protected]@21:1/5 to All on Mon Mar 20 07:05:10 2023
    I believe the popularity ranking is:
    1) logback
    2) log4j 2.x
    3) jul
    4) log4j 1.x (obsolete, deprecated)

    What is logback? I've seen this and thought it was just an older version of the log4j.
    I haven't heard of a jul logging.

    The big benefit of configuration files over programmatic
    configuration is that it allows operations to change logging
    without requiring help from software engineering.

    You can use the API to set up log4j configuration and read configuration from something someone other than the developer can edit.

    @Log4j2 annotation is a Lombok feature I believe, so only
    a possibility for those using Lombok.

    Arne

    Is the annotation just a shorter version of that one line factory statement or is there another benefit?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)