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Posted to issues@commons.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/09/03 18:25:00 UTC

[jira] [Work logged] (COMPRESS-540) Random access on Tar archive

     [ https://issues.apache.org/jira/browse/COMPRESS-540?focusedWorklogId=478748&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-478748 ]

ASF GitHub Bot logged work on COMPRESS-540:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 03/Sep/20 18:24
            Start Date: 03/Sep/20 18:24
    Worklog Time Spent: 10m 
      Work Description: coveralls edited a comment on pull request #113:
URL: https://github.com/apache/commons-compress/pull/113#issuecomment-654645643


   
   [![Coverage Status](https://coveralls.io/builds/33214895/badge)](https://coveralls.io/builds/33214895)
   
   Coverage increased (+0.06%) to 87.282% when pulling **bdd25476847d5b347cad288114e46e3ea474fe3e on theobisproject:random-access-tar** into **4eb3bbe8e95f5e3b6388b1e8db28b862cc712294 on apache:master**.
   


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 478748)
    Time Spent: 2.5h  (was: 2h 20m)

> Random access on Tar archive
> ----------------------------
>
>                 Key: COMPRESS-540
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-540
>             Project: Commons Compress
>          Issue Type: Improvement
>            Reporter: Robin Schimpf
>            Priority: Major
>          Time Spent: 2.5h
>  Remaining Estimate: 0h
>
> The TarArchiveInputStream only provides sequential access. If only a small amount of files from the archive is needed large amount of data in the input stream needs to be skipped.
> Therefore I was working on a implementation to provide random access to TarFiles equal to the ZipFile api. The basic idea behind the implementation is the following
>  * Random access is backed by a SeekableByteChannel
>  * Read all headers of the tar file and save the place to the data of every header
>  * User can request an input stream for any entry in the archive multiple times



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