Apache Geode Logging

["Thacker, Dharam" <dh...@jpmorgan.com>]

Hello Team,

Is there any alternative way for you guys to obtain below LoggerContext without explicitly type casting / strongly depending on org.apache.logging.log4j.core.Logger?

Class: org.apache.geode.internal.logging.LogService

private static void init() {
    LoggerContext context = ((org.apache.logging.log4j.core.Logger) LogManager.getLogger(BASE_LOGGER_NAME, GemFireParameterizedMessageFactory.INSTANCE)).getContext();
    context.removePropertyChangeListener(propertyChangeListener);
    context.addPropertyChangeListener(propertyChangeListener);
    context.reconfigure(); // propertyChangeListener invokes configureFastLoggerDelegating
    configureLoggers(false, false);
  }

Due to that strong and direct dependency on log4j-core/Logger instead of SLF4JContext, it does not permit to use logback for us with below dependency.  With that direct type usage, it results into below exception

Caused by: java.lang.ClassCastException: org.apache.logging.slf4j.SLF4JLogger cannot be cast to org.apache.logging.log4j.core.Logger
                at org.apache.geode.internal.logging.LogService.init(LogService.java:72)
                at org.apache.geode.internal.logging.LogService.<clinit>(LogService.java:69)


                ... 35 common frames omitted

<dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-to-slf4j</artifactId>
                <version>2.7</version>
</dependency>

I also tried "Using Different Front-End Logging APIs to Log to Log4j2" as suggested from below source but that too does not work. Usually it should work with log4j-to-slf4j which is binding for log4j2 to slf4j provided you don't have direct usage of org.apache.logging.log4j.core.Logger!
https://geode.apache.org/docs/guide/11/managing/logging/configuring_log4j2.html

Thanks & Regards,
Dharam

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Re: Apache Geode Logging

[Kirk Lund <kl...@apache.org>]

There are other strong dependencies on log4j2 core. Namely
LogWriterAppender and AlertAppender. Removing this dependency will require
some work to define an SPI and add a layer of indirection that allows the
Geode code that uses log4j2 core to be optional for a Cache.

On Tue, Apr 25, 2017 at 1:59 AM, Thacker, Dharam <
dharam.thacker@jpmorgan.com> wrote:

> Hello Team,
>
>
>
> Is there any alternative way for you guys to obtain below LoggerContext
> without explicitly type casting / strongly depending on
> org.apache.logging.log4j.core.*Logger**? *
>
>
>
> *Class: org.apache.geode.internal.logging.LogService*
>
>
>
> *private* *static* *void* init() {
>
>     LoggerContext context = ((org.apache.logging.log4j.core.Logger)
> LogManager.*getLogger*(*BASE_LOGGER_NAME*, GemFireParameterizedMessageFac
> tory.*INSTANCE*)).getContext();
>
>     context.removePropertyChangeListener(*propertyChangeListener*);
>
>     context.addPropertyChangeListener(*propertyChangeListener*);
>
>     context.reconfigure(); // propertyChangeListener invokes
> configureFastLoggerDelegating
>
>     *configureLoggers*(*false*, *false*);
>
>   }
>
>
>
> Due to that strong and direct dependency on log4j-core/Logger instead of
> SLF4JContext, it does not permit to use logback for us with below
> dependency.  With that direct type usage, it results into below exception
>
>
>
> Caused by: java.lang.ClassCastException: org.apache.logging.slf4j.SLF4JLogger
> cannot be cast to org.apache.logging.log4j.core.Logger
>
>                 at org.apache.geode.internal.logging.LogService.init(
> LogService.java:72)
>
>                 at org.apache.geode.internal.logging.LogService.<clinit>(
> LogService.java:69)
>
>
>
>
>
>                 ... 35 common frames omitted
>
>
>
> <dependency>
>
>                 <groupId>org.apache.logging.log4j</groupId>
>
>                 <artifactId>log4j-to-slf4j</artifactId>
>
>                 <version>2.7</version>
>
> </dependency>
>
>
>
> I also tried “Using Different Front-End Logging APIs to Log to Log4j2” as
> suggested from below source but that too does not work. Usually it should
> work with log4j-to-slf4j which is binding for log4j2 to slf4j provided you
> don’t have direct usage of org.apache.logging.log4j.core.*Logger**!*
>
> https://geode.apache.org/docs/guide/11/managing/logging/
> configuring_log4j2.html
>
>
>
> Thanks & Regards,
>
> Dharam
>
> This message is confidential and subject to terms at: http://
> www.jpmorgan.com/emaildisclaimer including on confidentiality, legal
> privilege, viruses and monitoring of electronic messages. If you are not
> the intended recipient, please delete this message and notify the sender
> immediately. Any unauthorized use is strictly prohibited.
>