Leos' contribution is at the bottom of this mail. It was sent directly to me and I
have not rejected it by any means. I just don't understand why anyone would want use
it. Anyone care to explain? Leos?
In any case, it should have been placed under the contribs/ directory of the log4j
distribution. My fault there. Regards, Ceki
>Delivered-To: [EMAIL PROTECTED]
>Delivered-To: [EMAIL PROTECTED]
>Delivered-To: [EMAIL PROTECTED]
>Sender: [EMAIL PROTECTED]
>Date: Thu, 25 Jan 2001 10:14:33 +0100
>From: Leos Literak <[EMAIL PROTECTED]>
>Organization: 12snap.com
>X-Mailer: Mozilla 4.76 [en] (X11; U; Linux 2.2.14-5.0 i686)
>X-Accept-Language: en
>To: [EMAIL PROTECTED]
>Subject: TempFileAppender
>X-Spam-Rating: h31.sny.collab.net 1.6.2 0/1000/N
>
>
>Hi Ceki,
>
>I have created one small Appender, which puts each
>logging statement into separate file. We use it
>for storing incomming messages into second process'es
>spool directory. If you like it, please include it
>into Log4j with APL license.
>
>Usage:
>
>log4j.appender.A1=org.apache.log4j.TempFileAppender
>log4j.appender.A1.Path=spool_dir
>log4j.appender.A1.Prefix=out_
>log4j.appender.A1.Suffix=.msg
>
> Leo
>
>--
>-----------------------------------------------------
>Leos Literak
>Software Engineer
>
>12snap s.r.o.
>Pstrossova 24
>110 00 Praha 1
>Czech Republic
>
>mobile: +420-605-849-087
>phone: +420-2-21-970-239
>fax: +420-2-21-970-241
>e-mail: [EMAIL PROTECTED]
Here is the file:
package org.apache.log4j;
import java.io.File;
import java.io.Writer;
import java.io.FileWriter;
import java.io.BufferedWriter;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.helpers.OptionConverter;
import org.apache.log4j.spi.ErrorHandler;
/**
TempFileAppender creates new unique file for each logging statement.
@author <a HREF="mailto:[EMAIL PROTECTED]">Leos Literak</a>
@author Ceki Gülcü
*/
public class TempFileAppender extends AppenderSkeleton {
/**
A string constant used in naming the option for setting the
directory where the log files will be created. Current value
of this string constant is <b>Path</b>. java.io.tmpdir directory
will be used, if ommited.
*/
static final public String PATH_OPTION = "Path";
/**
The default path is actual directory.
*/
protected String path = null;
/**
A string constant used in naming the option for setting the
prefix of the log files. It has to have at least 3 characters!
Current value of this string constant is <b>Prefix</b>.
*/
static final public String PREFIX_OPTION = "Prefix";
/**
The default path is actual directory.
*/
protected String prefix = "l4j_";
/**
A string constant used in naming the option for setting the
suffix of the log files. Current value of this string constant
is <b>Suffix</b>.
*/
static final public String SUFFIX_OPTION = "Suffix";
/**
The default path is actual directory.
*/
protected String suffix = ".tmp";
/**
Default dir
*/
protected File dir = null;
/**
The default constructor simply calls its parent's constructor.
*/
public TempFileAppender() {
super();
}
/**
Retuns the option names for this component
*/
public String[] getOptionStrings() {
return OptionConverter.concatanateArrays(super.getOptionStrings(),
new String[] {PATH_OPTION,PREFIX_OPTION,SUFFIX_OPTION});
}
/**
Set TempFileAppender specific options.
The recognized options are <b>Path</b>, <b>Prefix</b> and <b>Suffix</b>,
i.e. the values of the string constants {@link #PATH_OPTION},
{@link #PREFIX_OPTION} and respectively {@link #SUFFIX_OPTION}.
The options of the super class {@link AppenderSkeleton} are also
recognized.
*/
public void setOption(String key, String value) {
super.setOption(key, value);
if(key.equalsIgnoreCase(PATH_OPTION)) {
path = value;
if(path==null) {
errorHandler.error("Path cannot be empty!",null,0);
}
dir = new File(path);
if(!(dir.exists() && dir.isDirectory() && dir.canWrite())) {
errorHandler.error("Cannot write to directory " + path + "!",null,0);
}
}
else if(key.equalsIgnoreCase(PREFIX_OPTION)) {
if(value!=null && value.length()>=3) {
prefix = value;
} else {
errorHandler.error("Prefix cannot be shorter than 3 characters!",
null,0);
}
}
else if(key.equalsIgnoreCase(SUFFIX_OPTION)) {
if(value!=null && value.length()>=1) {
suffix = value;
} else {
errorHandler.error("Suffix cannot be empty!",null,0);
}
}
}
/**
This method is called by {@link AppenderSkeleton#doAppend}
method.
<p>Whenever this method is called, new unique file is created
with specified prefix and suffix. The file is closed afterwards.
<p>The format of the output will depend on this appender's
layout.
*/
public void append(LoggingEvent event) {
if(!checkEntryConditions()) {
return;
}
subAppend(event);
}
/**
This method determines if there is a sense in attempting to append.
*/
protected boolean checkEntryConditions() {
return true;
}
/**
This method does actual writing
*/
protected void subAppend(LoggingEvent event) {
try {
File tmp = File.createTempFile(prefix,suffix,dir);
Writer out = new BufferedWriter(new FileWriter(tmp));
out.write(event.message);
out.close();
/* this Appender is not supposed to be used for logging of Exceptions */
} catch (Exception e) {
errorHandler.error("Error during creation of temporary File!",e,1);
}
}
public boolean requiresLayout() {
return false;
}
public void close() {
/* nothing to do */
}
}
/*
* @author $Author: literakl $
* @version $Revision: 1.1 $
* @since $Date: 2001/01/25 10:30:14 $
*
* $Log: TempFileAppender.java,v $
*/
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