Hello For log4j, there's https://github.com/ops4j/org.ops4j.pax.logging/blob/master/pax-logging-log4j2/src/main/java/org/ops4j/pax/logging/log4j2/appender/PaxOsgiAppender.java that does just that - uses in-memory buffer. It's registered as log4j plugin.
I would so similar thing - register an appender as plugin AND as OSGi service (or have it referenced in other way) - so you won't have to retrieve it back from log4j2 internals. As for configuration - I still think it's better to configure it via configadmin. Otherwise you'd just have to reimplement pax-logging-log4j2 in a way that allows configuration using different method. regards Grzegorz Grzybek 2017-10-02 6:43 GMT+02:00 Asma Zinneera Jabir <[email protected]>: > > The way I have configured Log4j2 is through the following entry in > pax-logging.properties. > > org.ops4j.pax.logging.log4j2.config.file=path/to/log4j2.properties > > So when I try: > > Hashtable<String, Object> log4jProps = new Hashtable<String, Object>(); > log4jProps.put( "appender.CONSOLE.layout.pattern", "[%d] %5p {%c} - > %m%ex%n" ); > configuration.update(log4jProps); > > This will add another entry into pax-logging.properties as > appender.CONSOLE.layout.pattern = [%d] %5p {%c} - %m%ex%n which makes all > the entries in pax-logging.properties invalid. > > To make my requirement clear, I have two things to do. > > 1. I have a Log4J2 custom memory appender in which writes log events to a > circular buffer. During the runtime, I need to display these logs in the > UI. For this, I should be able to get the memory appender form the log4j2 > context. > 2. I need to give an option to the user to reconfigure all the appenders > during runtime throught the UI. For this, I should be able to reconfigure > the specified properties of appenders programatically. > > > On Wednesday, August 9, 2017 at 9:00:12 PM UTC+5:30, Jérémie Brébec wrote: >> >> Hello, >> >> I am using pax-logging 1.10.1 through Karaf 4.1.2 ; >> >> I am trying to integrate the log generated by my ElasticSearch bundle to >> the pax-logging implementation. However, this didn't work because a >> ClassCastException. I haven't see any "duplicate classloader issues", and >> when I check the code, the ClassCastException doesn't feel to be >> osgi-related. Is it a known issue or I am missing something ? >> >> Regards, >> Jérémie >> >> java.lang.ClassCastException: >> org.ops4j.pax.logging.log4jv2.Log4jv2LoggerContext >> cannot be cast to org.apache.logging.log4j.core.LoggerContext >> at >> org.apache.logging.log4j.core.LoggerContext.getContext(LoggerContext.java:190) >> [6:org.ops4j.pax.logging.pax-logging-log4j2:1.10.1] >> at >> org.apache.logging.log4j.core.config.Configurator.setLevel(Configurator.java:291) >> [6:org.ops4j.pax.logging.pax-logging-log4j2:1.10.1] >> at >> org.elasticsearch.common.logging.Loggers.setLevel(Loggers.java:149) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.common.logging.Loggers.setLevel(Loggers.java:144) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.index.SearchSlowLog.setLevel(SearchSlowLog.java:111) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.index.SearchSlowLog.<init>(SearchSlowLog.java:106) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at org.elasticsearch.index.IndexModule.<init>(IndexModule.java:127) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.indices.IndicesService.createIndexService(IndicesService.java:441) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.indices.IndicesService.createIndex(IndicesService.java:414) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at org.elasticsearch.cluster.metadata.MetaDataIndexTemplateServ >> ice.validateAndAddTemplate(MetaDataIndexTemplateService.java:216) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at org.elasticsearch.cluster.metadata.MetaDataIndexTemplateServ >> ice.access$200(MetaDataIndexTemplateService.java:63) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at org.elasticsearch.cluster.metadata.MetaDataIndexTemplateServ >> ice$2.execute(MetaDataIndexTemplateService.java:172) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.cluster.ClusterStateUpdateTask.execute(ClusterStateUpdateTask.java:45) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.cluster.service.ClusterService.executeTasks(ClusterService.java:634) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at org.elasticsearch.cluster.service.ClusterService.calculateTa >> skOutputs(ClusterService.java:612) [88:features.boss.elasticsearc >> h.bundle:5.5.0] >> at >> org.elasticsearch.cluster.service.ClusterService.runTasks(ClusterService.java:571) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at org.elasticsearch.cluster.service.ClusterService$ClusterServ >> iceTaskBatcher.run(ClusterService.java:263) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.cluster.service.TaskBatcher.runIfNotProcessed(TaskBatcher.java:150) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> org.elasticsearch.cluster.service.TaskBatcher$BatchedTask.run(TaskBatcher.java:188) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at org.elasticsearch.common.util.concurrent.ThreadContext$Conte >> xtPreservingRunnable.run(ThreadContext.java:569) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at org.elasticsearch.common.util.concurrent.PrioritizedEsThread >> PoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(Prio >> ritizedEsThreadPoolExecutor.java:247) [88:features.boss.elasticsearc >> h.bundle:5.5.0] >> at org.elasticsearch.common.util.concurrent.PrioritizedEsThread >> PoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:210) >> [88:features.boss.elasticsearch.bundle:5.5.0] >> at >> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) >> [?:?] >> at >> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) >> [?:?] >> > -- > -- > ------------------ > OPS4J - http://www.ops4j.org - [email protected] > > --- > You received this message because you are subscribed to the Google Groups > "OPS4J" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- -- ------------------ OPS4J - http://www.ops4j.org - [email protected] --- You received this message because you are subscribed to the Google Groups "OPS4J" group. 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