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https://issues.apache.org/jira/browse/IO-450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14556021#comment-14556021
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Benedikt Ritter commented on IO-450:
------------------------------------
The problem is, that tail is stream based but Tailer is line based. So the
comparison doesn't work out completely. If I have a file with the following
content:
{code}
AAAAAAA\n
BBBBBBB
{code}
And I do a {{tail -f}} on the file, I'll get the following output:
{code}
$: tail -f file.txt
AAAAAAA
BBBBBBB
{code}
It simply waits for new input on the last line. That could be an EOL or it
could be EOF. Tailer OTOH currently detects lines based on the EOL character. I
agree that lines without EOF at EOF should also be handled. A simple solution
would be to call {{listener.handle(new String(lineBuf.toByteArray(), cset))}}
after the while-loop in {{readLines(final RandomAccessFile reader)}} if the
{{lineBuf}} stil has content.
> File doesn't end with blank line and cann't get the last line using Tailer!
> ---------------------------------------------------------------------------
>
> Key: IO-450
> URL: https://issues.apache.org/jira/browse/IO-450
> Project: Commons IO
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.4
> Environment: linux and windows 7
> Reporter: davidchiu
> Priority: Minor
> Fix For: 2.5
>
>
> I use Tailer to read file, I can't get the last line if the file doesn't end
> with a blank line!
> My file like as following:
> AAAAAAAAAAAA
> BBBBBBBBBBBB
> And Not end with a blank line, "BBBBBBBBBBBB" is the last line, When I use
> io.input.Tailer to tail the file, I cann't get the last line "BBBBBBBBBBBB"!
> All versions(2.3/2.4/2.5) of Commons-IO have the same problem!
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