Hi K One of the simplest example of custom job started in a background thread that needs acces to a usable XWikiContext/XWiii is probably https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-search/xwiki-platform-search-solr/xwiki-platform-search-solr-api/src/main/java/org/xwiki/search/solr/internal/DefaultSolrIndexer.java#L542.
To summarize: * you annotate your job component @InstantiationStrategy(ComponentInstantiationStrategy.PER_LOOKUP) to make it unique get call to getInstance() * org.xwiki.context.concurrent.ExecutionContextRunnable wrapper is taking care or initializing an ExecutionContext for that thread for any Runnable * you access the current XWikiContext where you need it ny injecting the XWikiContext Provider On Thu, Dec 12, 2013 at 3:35 PM, Lukáš Raška <[email protected]> wrote: > Hi, > as discussed on IRC, I have trouble creating multiple simultaneous tasks > from inside component. > > Creating new thread results in malformed context, which can result in > XWikiException. > This could probably be avoided using Jobs, but nobody seems to know how > exactly. > > As of 5.1, it should be able to create custom jobs by extending > AbstractJob. > But how to get context inside that job? Could I use Provider in such way as > in ScriptWikiStreamConverterJob? (Multitaskness should be achieved with > InstantiationStrategy) > > About what I need to achieve - component creating API for "videolibrary" > extension (converting video attachment in certaing page to web-playable > format using libav). Since it should be safe to use, attachment is > immediately copied to specified temp folder (filesystem) after uploading. > Old attachment is deleted to ensure we didn't convert same file twice > (there is no callback with filenames for html5 fileupload widget). After > this, video will be converted to specified format and attached to different > page (using InputStream?). > > Is this idea safe to use? (or am I missing another possible problem?) > > > Thanks for replies > > -- > Best Regards > Lukas Raska > _______________________________________________ > devs mailing list > [email protected] > http://lists.xwiki.org/mailman/listinfo/devs -- Thomas Mortagne _______________________________________________ devs mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/devs
