At 09:16 11.05.2001 +0200, Marco Brandizi wrote:
>Hello,
>
>I'm an happy user of Log4J. I didn't understand if in new 1.6b version
>is avaible a "Priority Appender". I mean: an appender able to dispatch
>received messages to several destinations, one per each priority level.
You can attach multiple appenders to a category. In addition, filters can be added to
appenders.
>I already have developed classes to do that (one generic and one child,
>specific for files), which you find attached to this message, but still
>I have to develop the XML configuration part, which is very important
>for the context where I use them. If someone already has something
>alike, would be welcome ;-)
Assuming you errors to go error.log and debug output to go debug.log, you could add
two file appenders to the root category and attach a filter allowing only errors in
the first and only debugs in the second. See
org.apache.log4j.varia.PriorityMatchFilter and
org.apache.log4j.varia.PriorityRangeFilter.
>Please, answer me privately too, not only in the mailing list, otherwise
>I could forget it... ;-)
>
>Greetings
I have a few comments on your code. They are prefixed by \\\.
>-----------------------------------------------------------
>PriorityAppender.java ------------------------------
>
>import org.log4j.*;
>import org.log4j.spi.*;
>import java.util.HashMap;
>import java.util.Iterator;
>
>
>/**
> * (2000) Marco Brandizi
> *
> * This code is free and to be intended as covered by the principles
>stated in
> * GNU LGPL
> *
> * An appender used for associate an appender to each priority type, in
>the same
> * logging category, i.e.: You may send messages of cat C to
>C-errors.log
> * C-warn.logs, etc
> *
> */
\\\ We can only accept contributions that are under the Apache
\\\ Software License. LGPL is a no-no.
>public class PriorityAppender implements Appender {
\\\ You should have implemented the AppanderAttachable interface.
\\\ See for example the AsyncAppender.
> private HashMap appenders = new HashMap();
\\\ HashMap was introduced in JDK 1.2. Log4j requires JDK 1.1 compatibility.
> private String name = "PriorityAppender";
>
> /** Adds an appender, associated to a priority, if p already had one,
> throws it away */
> public void addAppender ( Priority p, Appender a )
> {
>
> Appender old = (Appender) appenders.get ( p );
>
> if ( old == a )
> // Hey, it's the same!
> return;
> else if (old != null )
> // Release the old one
> old.close();
> else
> // Append new
> appenders.put (p, a);
> }
>
> /** null if p isn't correct */
> public Appender getAppender ( Priority p )
> {
> return (Appender) appenders.get (p);
> }
>
> /** Appenders are removed at end */
> protected void removeAppenders ()
> {
> Iterator iA = appenders.values().iterator();
> Appender a;
> while ( iA.hasNext() )
> ((Appender)iA.next()).close();
> appenders = null;
> }
>
>
> /** Does nothing, I don't need them here... */
> public void addFilter(Filter newFilter) {
> }
>
> /** Does nothing, I don't need them here... */
> public void clearFilters() {
> }
>
> public void close() {
> removeAppenders();
> }
>
> /** Switch the priority and forward to the proper appender */
> public void doAppend(LoggingEvent event) {
> Appender a = getAppender ( event.priority );
> a.doAppend(event);
> }
>
> /** Default is "PriorityAppender" */
> public String getName() {
> return name;
> }
>
> /** Does nothing, I don't need them here... */
> public void setErrorHandler(ErrorHandler errorHandler) {
> }
>
> /** Does nothing, I don't need them here... */
> public void setLayout(Layout layout) {
> }
>
> public void setName(String name) {
> this.name = name;
> }
>
> /** FALSE! */
> public boolean requiresLayout() {
> return false;
> }
>
>}
\\\ That's it.
Regards, Ceki
--
Ceki Gülcü
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