Why are you doing it this way? Can you not just use the RoutingAppender?
https://logging.apache.org/log4j/2.x/manual/appenders.html#RoutingAppender
Ralph
> On Oct 18, 2023, at 8:50 PM, Ganesh S <ganesh123.g...@gmail.com> wrote:
>
> Hello,
> I'm trying to create different logger with different hostname and port for
> different client requests to the server.
> If a new client request comes, I will store the information in the thread
> local object and based on the information I need to append a new logger
> object to the existing configuration object using CompositeConfiguration
> and update loggers in the logger context.
> I'm using the name of the logger object not to have a package level
> hierarchy but just as a named (client name) logger.
>
> Currently I'm getting the below error when I try to append new syslog using
> CompositeConfiguration
> at the line
> logContext.reconfigure(compositeConfiguration);
>
> ERROR StatusConsoleListener Appender references must contain a reference
> ERROR StatusConsoleListener Null object returned for AppenderRef in Logger.
> ERROR StatusConsoleListener No appender name provided
> ERROR StatusConsoleListener Could not create plugin of type class
> org.apache.logging.log4j.core.appender.SyslogAppender for element Syslog
> org.apache.logging.log4j.core.config.ConfigurationException: Arguments
> given for element Syslog are invalid: field 'name' has invalid value 'null'
> at
> org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.injectFields(PluginBuilder.java:199)
> .....
> at
> org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:621)
> at
> org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:715)
> ERROR StatusConsoleListener Null object returned for Syslog in Appenders.
>
>
> Below is my implementation
>
> ConfigurationBuilder<BuiltConfiguration> builder1 =
> ConfigurationBuilderFactory.newConfigurationBuilder();
> AppenderComponentBuilder syslogAppender1 =
> builder1.newAppender("syslog", "Syslog")
> .addAttribute("protocol", "UDP")
> .addAttribute("host", hostname)
> .addAttribute("port", port1)
> .addAttribute("appName", "serviceName")
> .addAttribute("id", "serviceName")
> .addAttribute("facility", "LOCAL0")
> .addAttribute("newLine", true)
> .addAttribute("format", "RFC5424")
> .addAttribute("ignoreExceptions", false);
> syslogAppender1.add(builder1.newFilter("ThresholdFilter",
> Filter.Result.ACCEPT, Filter.Result.DENY)
> .addAttribute("level", Level.DEBUG));
> builder1.add(syslogAppender1);
>
> builder1.add(builder1.newLogger("client1", Level.DEBUG)
> .add(builder1.newAppenderRef("syslog"))
> .addAttribute("additivity", false));
> Configurator.reconfigure(builder1.build());
>
> Logger logger = LogManager.getLogger("client1");
> logger.info("client1 message1");
>
> ConfigurationBuilder<BuiltConfiguration> builder =
> ConfigurationBuilderFactory.newConfigurationBuilder();
> AppenderComponentBuilder syslogAppender = builder.newAppender("syslog1",
> "Syslog")
> .addAttribute("protocol", "UDP")
> .addAttribute("host", hostname)
> .addAttribute("port", port2)
> .addAttribute("appName", "serviceName")
> .addAttribute("id", "serviceName")
> .addAttribute("facility", "LOCAL0")
> .addAttribute("newLine", true)
> .addAttribute("format", "RFC5424")
> .addAttribute("ignoreExceptions", false);
>
> syslogAppender.add(builder.newFilter("ThresholdFilter",
> Filter.Result.ACCEPT, Filter.Result.DENY)
> .addAttribute("level", Level.DEBUG));
> builder.add(syslogAppender);
>
> builder.add(builder.newLogger("client2", Level.DEBUG)
> .add(builder.newAppenderRef("syslog1"))
> .addAttribute("additivity", false));
>
> LoggerContext logContext = LoggerContext.getContext(false);
> org.apache.logging.log4j.core.config.Configuration configurationcore =
> logContext.getConfiguration();
> List<AbstractConfiguration> configurationList = new ArrayList<>();
> if (configurationcore != null)
> configurationList.add((AbstractConfiguration) configurationcore);
> org.apache.logging.log4j.core.config.Configuration newconfig =
> builder.build();
> configurationList.add((AbstractConfiguration) newconfig);
> CompositeConfiguration compositeConfiguration = new
> CompositeConfiguration(configurationList);
> logContext.reconfigure(compositeConfiguration);
> logContext.updateLoggers();
>
> Logger logger1 = LogManager.getLogger("client2");
> logger1.info("client2 message1");
> logger1.info("client2 message2");
> logger.info("client1 message2");
> logger1.info("client2 message3");
> logger.info("client1 message3");
>
>
> Thank you,
> Ganesh S
