Thank you, Mark. Have a nice weekend. Nancy ----- Original Message ----- From: "Mark Womack" <[EMAIL PROTECTED]> To: "'Log4J Users List'" <[EMAIL PROTECTED]> Sent: Friday, February 07, 2003 3:50 PM Subject: RE: questions related to config xml file
> Nancy, > > The method you have outlined below is simpler and should work just fine. > Yes, it is possible to attach a specific appender to a specific logger. You > probably don't want the reference to the socket hub appender in the root > logger: > > <logger name="placeOrder"> > <appender-ref ref="SOCKET_HUB"/> > </logger> > > <root>...</root> > > This will ensure that the placeOrder messages will only go to SOCKET_HUB > once (the messages will still appear in all appenders attached to root). > > The limitation is that you have to have a specific logger for all "place > order" activity and so code will need to get that logger (or call your > placeOrderLog method). Or, it could be strength, depending on how you look > at it. Overall, not a bad solution. > > The one I was proposing, using filters, is a bit more complex but is more > flexible in the client code. For example, once the user enters a portion of > the code where an order is being placed, you could set that state in the NDC > or MDC. The filter configuration on the SocketHubAppender would find this > info in the NDC and MDC and then allow those log messages through. No > specific knowledge of a specific "place order" logger would be needed. > > I'll post the filters to the list on Monday, and you can judge for yourself. > As I said, your current solution is workable and efficient. > > -Mark > > > -----Original Message----- > > From: Nancy [mailto:[EMAIL PROTECTED]] > > Sent: Friday, February 07, 2003 11:31 AM > > To: Log4J Users List > > Subject: Re: questions related to config xml file > > > > > > Mark: > > > > Thank you very much for your help and your invitation. I am > > very glad to > > accept the invitation and give them a try. It sounds pretty > > interesting to > > me. Please send me the jar file whenever you are convenient. > > > > Mark, since right now I am trying to restrict the set of > > logging events by > > using util class combined with configuration file, which is totally > > different with what you suggestted. I am not sure if I am > > right, or it is > > not possible to do so. I would like to describe what I have done and > > appreciate your idea. > > > > The utility class for initializing the major activities' log. > > The following > > is the snippet of the util class: > > =================================================================== > > /** Class <code>Log</code> common log class for other major > > activities log > > class to extends from*/ > > public final class ActivitiesLog { > > > > //var declaration > > private static ActivitiesLog activityLog = null; > > private Logger placeOrderLog = null; > > > > ................... > > private static ActivitiesLog getInstance() { > > if (activityLog == null) activityLog = new ActivitiesLog(); > > return activityLog ; > > } > > > > private ActivitiesLog() { > > > > DOMConfigurator.configure(Settings.getInstance().getSetting("/ > > /Configuration > > file")); > > placeOrderLog = Logger.getLogger("placeOrder"); > > } > > > > public static void placeOrderLog(String s) { > > getInstance().placeOrderLog .info(s); //begin to log > > } > > } > > > > > > When placeOrder(for example) happenes, I call placeOrderLog(String s) > > method( as showed above) to initialize log for "placeOrder" > > activity. In the > > configuration file, there are the following lines: > > > > <appender name="SOCKET_HUB" > > class="org.apache.log4j.net.SocketHubAppender"> > > <param name="Port" value="7001"/> > > </appender> > > > > <logger name="placeOrder" > > > <appender-ref ref="SOCKET_HUB"/> > > </logger> > > > > <root>....<appender-ref ref="SOCKET_HUB" /></root> > > > > ============================================================== > > ============== > > ======================= > > In a word, is it possible to configurate a specific logger > > and attach it to > > a specific appender in the XML style configuration file? > > > > Thank you very much for your time. I really appreciate your help. > > > > Regards. > > Nancy > > > > > > > > > > ----- Original Message ----- > > From: "Mark Womack" <[EMAIL PROTECTED]> > > To: "'Log4J Users List'" <[EMAIL PROTECTED]> > > Sent: Friday, February 07, 2003 1:45 PM > > Subject: RE: questions related to config xml file > > > > > > > Nancy, thanks for the details. I believe I understand what > > you are trying > > > to do. > > > > > > Yes, it is possible to restrict the set of logging events > > sent to the > > remote > > > client by the SocketHubAppender. And I think this is a > > very good use of > > > SocketHubAppender, btw, given your requirements. > > > > > > The best method for restricting events that are sent via > > SocketHubAppender > > > (or SocketAppender for that matter) is configuring a filter > > chain on that > > > appender. You can see the javadoc information on log4j filters at: > > > > > > > > http://jakarta.apache.org/log4j/docs/api/org/apache/log4j/spi/ > > Filter.html > > > > > > And there are few good examples in the varia package: > > > > > > > > http://jakarta.apache.org/log4j/docs/api/org/apache/log4j/vari > > a/package-fram > > > e.html > > > > > > But, I have been working on a new package of useful filters > > for the v1.3 > > > release. They are fully compatible with v1.2.X. If I > > package them up > > into > > > a jar file, would you be interested in giving them a try? > > They allow full > > > configuration of a filter chain using almost any set of > > source criteria > > you > > > might want (contents of the message string, contents of the > > MDC, contents > > of > > > the NDC, level of the logger, etc). > > > > > > And this invitation is for anyone out there that might be > > interested. > > > > > > -Mark > > > > > > > -----Original Message----- > > > > From: Nancy [mailto:[EMAIL PROTECTED]] > > > > Sent: Wednesday, December 11, 2002 11:14 AM > > > > To: Log4J Users List > > > > Subject: Re: questions related to config xml file > > > > > > > > > > > > Hi,Mark: > > > > > > > > Thank you so much for your reply. > > > > > > > > Sorry for not providing enough information. > > > > > > > > The following is the description of what I am attemping > > to accomplish: > > > > We have developed a web application. Now I am developing a > > > > swing application > > > > which is used to monitor some major activities (such as place > > > > orders, login, > > > > logout and etc.) happened in the web application. The > > > > connection between the > > > > swing application and the web application is initialized > > by the swing > > > > application(I mean when a system admin clicks the connect > > > > button on the > > > > swing user interface). After the connection is established, > > > > whenever users > > > > login, logout, or place orders in the web application, the > > > > swing application > > > > should IMMEDIATELY detects them, and display the appropriate > > > > message(Such as > > > > "user has place an order", "user has login the web site"). > > > > After doing some > > > > study on log4j api, we decided to use SocketHubAppender in the web > > > > application to accomplish the senario. > > > > > > > > > > > > I am using xml formate to config the configuration file. The > > > > following is > > > > what I configured in the configuration file: (I omitted the > > > > parts that are > > > > not related to the senario): > > > > ... > > > > <log4j:configuration > > xmlns:log4j='http://jakarta.apache.org/log4j/'> > > > > ....... > > > > <!-- for Activity monitor purpose.--> > > > > <!-- SocketHubAppender does not use a layout--> > > > > > > > > <appender name="SOCKET_HUB" > > > > class="org.apache.log4j.net.SocketHubAppender"> > > > > <param name="Port" value="7001"/> > > > > </appender> > > > > > > > > <root> > > > > .... > > > > <!-- for Activity monitor purpose. --> > > > > <appender-ref ref="SOCKET_HUB" /> > > > > </root> > > > > > > > > </log4j:configuration> > > > > > > > > > > > > Question1: What else do I need to config in the > > > > configuration file? > > > > Question2: I ONLY want SOME activities to use > > > > SocketHubAppender, for instance, activities such as login, > > > > logout, place > > > > orders. How should I do to limit the use of SocketHubAppender > > > > only to those > > > > activities? We have already used logging mechnism for ALL > > > > activities for > > > > general logging purpose(such as logging to file systems, > > > > console), and we > > > > prefer those general logging still exist while add the use > > > > SocketHubAppender > > > > for some activities. > > > > > > > > I tried my best to make the senario and the questions clear. > > > > However, I am > > > > very glad to explain them in more detail if you have any confuse. > > > > > > > > Thank you very much for your reply. > > > > > > > > Best regards, > > > > > > > > Nancy > > > > > > > > > > > > > > > > > > > > ----- Original Message ----- > > > > From: "Mark Womack" <[EMAIL PROTECTED]> > > > > To: "'Log4J Users List'" <[EMAIL PROTECTED]> > > > > Sent: Thursday, February 06, 2003 12:52 PM > > > > Subject: RE: questions related to config xml file > > > > > > > > > > > > > Nancy, > > > > > > > > > > Can you give more detail of what you are trying to > > accomplish. The > > > > > SocketHubAppender does not accept any configuration for the > > > > XMLAppender. > > > > It > > > > > is just a mechanism to stuff the logging event over a > > > > socket to a remote > > > > > client. The remote client would be responsible for > > setting up an > > > > > XMLAppender for output. > > > > > > > > > > -Mark > > > > > > > > > > > -----Original Message----- > > > > > > From: Nancy [mailto:[EMAIL PROTECTED]] > > > > > > Sent: Tuesday, December 10, 2002 11:54 AM > > > > > > To: Log4J Users List > > > > > > Subject: questions related to config xml file > > > > > > > > > > > > > > > > > > Hi: > > > > > > > > > > > > I am implementing remote debugging using SocketHubAppender. I > > > > > > want to use > > > > > > XML to write the configuration file. I read log4j.dtd, > > > > but not fully > > > > > > understand it. I guess because I am doing remote debugging, > > > > > > so I need to > > > > > > config log4j:eventSet, and inside the element, there > > can be 0-many > > > > > > log4j:event elements.I tried to find an example on how to > > > > > > config this, but > > > > > > unfortunatly, I didn't find. Could you help me on how to > > > > config the > > > > > > configuration file, or point me to a link where there is an > > > > > > example. Thank > > > > > > you very much for your help. > > > > > > > > > > > > regards, > > > > > > > > > > > > Nancy > > > > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > > > > To unsubscribe, e-mail: > > [EMAIL PROTECTED] > > > > > > For additional commands, e-mail: > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > > > To unsubscribe, e-mail: > > [EMAIL PROTECTED] > > > > > For additional commands, e-mail: > > [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > For additional commands, e-mail: > > [EMAIL PROTECTED] > > > > > > > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
