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From "Thomas Mueller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1388) Jackrabbit does not allow concurrent reads to the data store if copyWhenReading=false
Date Thu, 06 Mar 2008 16:38:58 GMT

    [ https://issues.apache.org/jira/browse/JCR-1388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12575765#action_12575765

Thomas Mueller commented on JCR-1388:


Your new patch is better, but there are still a few issues:

You still have tabs in the source code: 2 to go ;-)

There is still a catch (Exception e) {}. catch (IOException e) {} should at least have a remark,
but it's better to log the exception (with stack trace) 

TestTwoGetStreams.streamToString() expects to read everything with one InputStreamReader.read
call. This method could theoretically return a value smaller than requested in length. You
should deal with that in some way; for example, use DataInputStream.readFully. Also, the conversion
to String expects the data is stored in the current system encoding, that may not be the case.

I wouldn't use new FileInputStream("NOTICE.txt"), I would use new RandomInputStream(0, 10
* 1024 * 1024). You can't be sure that NOTICE.txt will always be there and have that name.

The method testTwoGetStreams doesn't have any assertion. It doesn't check if the data read
from the repository is the same as in the files. Only calling log.info is not a good test
I believe.

DatabaseHelper doesn't have a class level javadoc.

getDatabaseResources: is the 'finally' and the boolean success required? Could the code in
'finally' not be written in the 'catch' block?

DbInputStream.mark and reset are synchronized: I don't understand why this needs to be synchronized
in your class as well. I probably need to ask Arthur van Hoff then ;-)


> Jackrabbit does not allow concurrent reads to the data store if copyWhenReading=false
> -------------------------------------------------------------------------------------
>                 Key: JCR-1388
>                 URL: https://issues.apache.org/jira/browse/JCR-1388
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: jackrabbit-core
>    Affects Versions: 1.4
>         Environment: WinXP x64, Eclipse, remote SQL Server 2005
>            Reporter: Esteban Franqueiro
>         Attachments: JCR-1388-datastore-concurrent-reads.2.patch, JCR-1388-datastore-concurrent-reads.4.patch,
JCR-1388-datastore-concurrent-reads.patch, TestTwoGetStreams.java
> Jackrabbit does not allow concurrent reads to the data store if copyWhenReading=false,
even if maxConnections>1.
> See JCR-1184 for a test for this problem (run it with copyWhenReading=false).

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