How to ues log4j to send log email in the multithreaded processes as similiar with single-threaded - 未名空间MITBBS历史存档

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How to ues log4j to send log email in the multithreaded processes as similiar with single-threaded

How to ues log4j to send log email in the multithreaded processes as similiar with single-threaded# Java - 爪哇娇娃

l*b2009-03-12 07:03

1 楼

My current system is single-threaded with several modules which are
processed in sequence. I use SMTPAppender to capture error and send warning
emails with the following format:
[time][thread-1][module 1]start: XXXXXXX
[time][thread-1][module 2]XXXXXXX
[time][thread-1][module 3]XXXXXXX
[time][thread-1][module 4]ERR: XXXXXXX
After I change the system to multhithreaded, the logs will be tangled up
like:
[time][thread-1][module 1]start: XXXXXXX
[time][thread-2][module 1]start: XXXXXXX
[time][thread

g*g2009-03-12 07:03

2 楼

You either create logger per thread, or maybe extend SMTPAppender and
filter the log the way you want.

warning

【在 l*****b 的大作中提到】

: My current system is single-threaded with several modules which are
: processed in sequence. I use SMTPAppender to capture error and send warning
: emails with the following format:
: [time][thread-1][module 1]start: XXXXXXX
: [time][thread-1][module 2]XXXXXXX
: [time][thread-1][module 3]XXXXXXX
: [time][thread-1][module 4]ERR: XXXXXXX
: After I change the system to multhithreaded, the logs will be tangled up
: like:
: [time][thread-1][module 1]start: XXXXXXX

l*b2009-03-12 07:03

3 楼

Thanks, goodbug. Those are good advice. I have some questions on them:
For logger per thread, will it impact the performance? Provided thread pool
max is 200, there are about 200 logger at some time.
For customed SMTPAppender, how many buffer should I set? If threads
increased, it has chance the fixed buffer cannot reach the first log entry.

A*o2009-03-12 07:03

4 楼

question: how do you capture error and remembers the previous log event?
or how many emails you receive in the single thread mode in your example?

warning

【在 l*****b 的大作中提到】

l*b2009-03-12 07:03

5 楼

Hi,Amao, I use SMTPAppender. It has a buffer setting to record specific
number of log events. My setting in single thread mode is 10. When error
occurs, one email is send out with 10 events.

A*o2009-03-12 07:03

6 楼

thanks for explaining. but i doubt the logger per thread
model would work without make your own extentions.
anyway, i don't think your request is what log4j intends to do.
and from my experience, tempering with log4j other than config is not worthy.
how about dump everything into a db using jdbc appender,
and assign each thread with a uid and log it.
and when an error occurs,
dig the db, and query on the uid, and send your email?

【在 l*****b 的大作中提到】

: Hi,Amao, I use SMTPAppender. It has a buffer setting to record specific
: number of log events. My setting in single thread mode is 10. When error
: occurs, one email is send out with 10 events.