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From: JLP <JLP@jlp.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Tailing a series of log files
Date: Sat, 15 Jun 2013 18:59:05 +0200
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Le 15/06/2013 15:20, Eric Sosman a écrit :
> On 6/15/2013 12:11 AM, Daniel Pitts wrote:
>> On 6/14/13 6:06 PM, Eric Sosman wrote:
>>> On 6/14/2013 7:00 PM, Arved Sandstrom wrote:
>>>> On 06/12/2013 09:04 AM, SamXiao wrote:
>>>>> Hi all,
>>>>>
>>>>> I am working on a solution to keep track of a series of log files and
>>>>> read the tail lines. At the very beginning, there is only one log file
>>>>> named “TEST-YYYYMMDD-00.log” (where YYYYMMDD is the current date).
>>>>> When the size of this log reaches to 10 MB, another log file
>>>>> “TEST-YYYYMMDD-01.log” will be generated and so forth. After midnight
>>>>> (12:00), a new log file with the next date starting with 00 again will
>>>>> be generated.
>>>>>
>>>>> I know Apache Commons IO containing tail.java. However, seems it is
>>>>> for tailing a single log file only. How could I keep tailing a series
>>>>> of log files?
>>>>>
>>>
[SNIP because of NNTP server]
>
if I understand the OP requirements, a solution may be the pattern 
Observer/Observable :
- a thread Observable  that follows   the creation of file
TEST-[\d]{6}(-[^\.])?.log . When a new file is created motify the thread 
Observer with the new file log
- a thread Observer subscribed to the Observable   that tails the last 
file log and rotate when notified
http://en.wikipedia.org/wiki/Observer_pattern