Java: Logging with FileHandler, rotation
I use FileHandler for logging.
Logger l = Logger.getLogger ("mylogger");
FileHandler fh = new FileHandler ("log", 1000000, 2, true);
l.addHandler (fh);
That would always log to log.0. If that reaches 1MB it gets moved to log.1.
Logging continues at the empty log.0.
log.0
log.1
As far I see the numbers start always with 0. Is there a way to have no number at the current log and start he rotated log with 1?
log
log.1
java logging
asked Nov 21 '18 at 16:36
chris01chris01
3,76821733
add a comment |
I use FileHandler for logging.
Logger l = Logger.getLogger ("mylogger");
FileHandler fh = new FileHandler ("log", 1000000, 2, true);
l.addHandler (fh);
That would always log to log.0. If that reaches 1MB it gets moved to log.1.
Logging continues at the empty log.0.
log.0
log.1
As far I see the numbers start always with 0. Is there a way to have no number at the current log and start he rotated log with 1?
log
log.1
java logging
asked Nov 21 '18 at 16:36
chris01chris01
3,76821733
Are you using a logging framework like slf4j?
– Jabari Dash
Nov 21 '18 at 17:34
Its Javas own java.util.logging.Logger. So now external framework used.
– chris01
Nov 21 '18 at 17:47
add a comment |
I use FileHandler for logging.
Logger l = Logger.getLogger ("mylogger");
FileHandler fh = new FileHandler ("log", 1000000, 2, true);
l.addHandler (fh);
That would always log to log.0. If that reaches 1MB it gets moved to log.1.
Logging continues at the empty log.0.
log.0
log.1
As far I see the numbers start always with 0. Is there a way to have no number at the current log and start he rotated log with 1?
log
log.1
java logging
asked Nov 21 '18 at 16:36
chris01chris01
3,76821733
I use FileHandler for logging.
Logger l = Logger.getLogger ("mylogger");
FileHandler fh = new FileHandler ("log", 1000000, 2, true);
l.addHandler (fh);
That would always log to log.0. If that reaches 1MB it gets moved to log.1.
Logging continues at the empty log.0.
log.0
log.1
As far I see the numbers start always with 0. Is there a way to have no number at the current log and start he rotated log with 1?
log
log.1
java logging
java logging
asked Nov 21 '18 at 16:36
chris01chris01
3,76821733
asked Nov 21 '18 at 16:36
chris01chris01
3,76821733
asked Nov 21 '18 at 16:36
chris01chris01
3,76821733
asked Nov 21 '18 at 16:36
chris01chris01
3,76821733
asked Nov 21 '18 at 16:36
chris01chris01
3,76821733
3,76821733
Are you using a logging framework like slf4j?
– Jabari Dash
Nov 21 '18 at 17:34
Its Javas own java.util.logging.Logger. So now external framework used.
– chris01
Nov 21 '18 at 17:47
add a comment |
Are you using a logging framework like slf4j?
– Jabari Dash
Nov 21 '18 at 17:34
Its Javas own java.util.logging.Logger. So now external framework used.
– chris01
Nov 21 '18 at 17:47
Are you using a logging framework like slf4j?
– Jabari Dash
Nov 21 '18 at 17:34
Are you using a logging framework like slf4j?
– Jabari Dash
Nov 21 '18 at 17:34
Its Javas own java.util.logging.Logger. So now external framework used.
– chris01
Nov 21 '18 at 17:47
Its Javas own java.util.logging.Logger. So now external framework used.
– chris01
Nov 21 '18 at 17:47
add a comment |
1 Answer
1
active
oldest
votes
Short answer: Not using the default FileHandler
That said, there is nothing stopping you from writing your own StreamHandler.
This is OpenJDK's FileHandler implementation. It's actually only a couple lines of modifications to achieve your desired behaviour.
FileHandler actually generates all the filenames upfront in an array. You simply want to tweak the generation code such that the first element does not contain the '0'. It is extremely unfortunate that it's a private method, so you have to re-implement the whole class rather than simply extending it.
NOTE: If you are going to base your implementation on OpenJDK's, please respect the license under which it is distributed. I am not a lawyer, so you may want to ask other people of the legalities of using a modified OpenJDK source.
Now that that's out of the way, look inside the generate() method. There are two spots that use the generation parameter, which is the index of your logfile.
} else if (ch2 == 'g') {
word = word.append(generation); // this line
// ...and...
if (count > 1 && !sawg) {
word = word.append('.').append(generation); // this line
You want them to be guarded by if (generation > 0)
That should stop the log files from showing the 0th index on the filename.
answered Nov 22 '18 at 7:35
NPrasNPras
1,101718
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Short answer: Not using the default FileHandler
That said, there is nothing stopping you from writing your own StreamHandler.
This is OpenJDK's FileHandler implementation. It's actually only a couple lines of modifications to achieve your desired behaviour.
FileHandler actually generates all the filenames upfront in an array. You simply want to tweak the generation code such that the first element does not contain the '0'. It is extremely unfortunate that it's a private method, so you have to re-implement the whole class rather than simply extending it.
NOTE: If you are going to base your implementation on OpenJDK's, please respect the license under which it is distributed. I am not a lawyer, so you may want to ask other people of the legalities of using a modified OpenJDK source.
Now that that's out of the way, look inside the generate() method. There are two spots that use the generation parameter, which is the index of your logfile.
} else if (ch2 == 'g') {
word = word.append(generation); // this line
// ...and...
if (count > 1 && !sawg) {
word = word.append('.').append(generation); // this line
You want them to be guarded by if (generation > 0)
That should stop the log files from showing the 0th index on the filename.
answered Nov 22 '18 at 7:35
NPrasNPras
1,101718
add a comment |
Short answer: Not using the default FileHandler
That said, there is nothing stopping you from writing your own StreamHandler.
This is OpenJDK's FileHandler implementation. It's actually only a couple lines of modifications to achieve your desired behaviour.
FileHandler actually generates all the filenames upfront in an array. You simply want to tweak the generation code such that the first element does not contain the '0'. It is extremely unfortunate that it's a private method, so you have to re-implement the whole class rather than simply extending it.
NOTE: If you are going to base your implementation on OpenJDK's, please respect the license under which it is distributed. I am not a lawyer, so you may want to ask other people of the legalities of using a modified OpenJDK source.
Now that that's out of the way, look inside the generate() method. There are two spots that use the generation parameter, which is the index of your logfile.
} else if (ch2 == 'g') {
word = word.append(generation); // this line
// ...and...
if (count > 1 && !sawg) {
word = word.append('.').append(generation); // this line
You want them to be guarded by if (generation > 0)
That should stop the log files from showing the 0th index on the filename.
answered Nov 22 '18 at 7:35
NPrasNPras
1,101718
add a comment |
Short answer: Not using the default FileHandler
That said, there is nothing stopping you from writing your own StreamHandler.
This is OpenJDK's FileHandler implementation. It's actually only a couple lines of modifications to achieve your desired behaviour.
FileHandler actually generates all the filenames upfront in an array. You simply want to tweak the generation code such that the first element does not contain the '0'. It is extremely unfortunate that it's a private method, so you have to re-implement the whole class rather than simply extending it.
NOTE: If you are going to base your implementation on OpenJDK's, please respect the license under which it is distributed. I am not a lawyer, so you may want to ask other people of the legalities of using a modified OpenJDK source.
Now that that's out of the way, look inside the generate() method. There are two spots that use the generation parameter, which is the index of your logfile.
} else if (ch2 == 'g') {
word = word.append(generation); // this line
// ...and...
if (count > 1 && !sawg) {
word = word.append('.').append(generation); // this line
You want them to be guarded by if (generation > 0)
That should stop the log files from showing the 0th index on the filename.
answered Nov 22 '18 at 7:35
NPrasNPras
1,101718
Short answer: Not using the default FileHandler
That said, there is nothing stopping you from writing your own StreamHandler.
This is OpenJDK's FileHandler implementation. It's actually only a couple lines of modifications to achieve your desired behaviour.
FileHandler actually generates all the filenames upfront in an array. You simply want to tweak the generation code such that the first element does not contain the '0'. It is extremely unfortunate that it's a private method, so you have to re-implement the whole class rather than simply extending it.
NOTE: If you are going to base your implementation on OpenJDK's, please respect the license under which it is distributed. I am not a lawyer, so you may want to ask other people of the legalities of using a modified OpenJDK source.
Now that that's out of the way, look inside the generate() method. There are two spots that use the generation parameter, which is the index of your logfile.
} else if (ch2 == 'g') {
word = word.append(generation); // this line
// ...and...
if (count > 1 && !sawg) {
word = word.append('.').append(generation); // this line
You want them to be guarded by if (generation > 0)
That should stop the log files from showing the 0th index on the filename.
answered Nov 22 '18 at 7:35
NPrasNPras
1,101718
edited Nov 29 '18 at 23:23
answered Nov 22 '18 at 7:35
NPrasNPras
1,101718
answered Nov 22 '18 at 7:35
NPrasNPras
1,101718
answered Nov 22 '18 at 7:35
NPrasNPras
1,101718
1,101718
add a comment |
add a comment |
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Are you using a logging framework like slf4j?
– Jabari Dash
Nov 21 '18 at 17:34
Its Javas own java.util.logging.Logger. So now external framework used.
– chris01
Nov 21 '18 at 17:47