Setting MDC context to logging

When a page has more than one external components, Is there request context parameter passed to various externals same or different?

If a page has more than one component with external java code invoked and each external class will have few logging statements. Is there a way that I can append (request) context information to each log.

One way to do that is

MDC.put("context", "<Some Unique Identifier>);

This I have to add in all components to make it work for all logging statements. Is there a way I can do the same for each unique page rendering request coming to livesite and it will be applied to logging for all external component calls for the page.

Is there any entry in livesite to give unique id to each page request and log in the some logs.

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Comments

Rick Poulin

Unique to each component instance: context.getComponentId()

Unique to each page: context.getSite().getName() + "/" + context.getPageName()

Unique to each http request: context.getRequest()

Unique to each http session: context.getRequest().getSession().getId()

a2Lvyas

Thanks for the reply. My point is do i need to specify mdc variable for logs in all the external classes for each and every component or can i configure it somewhere and get it reflected throghout

the need is that each logged entry should show context information before logged msg and i dnt wantto change all classes

Rick Poulin

Well the whole idea of MDC is that it doesn't know how to relate things together without you telling it, so as a baseline, yes you have to put that code all over the place.

That said, AOP (aspect-oriented programming) could help you do it once for a whole type/grouping of classes. Spring already includes AOP functionality, but configuring it is kinda beyond the scope of this forum. I suggest you read up on that, and ask for help in more generic Java forums on the web.