[jira] [Resolved] (OLINGO-604) Injected Entity Managers are closed after fetching query results

["Chandan V.A (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OLINGO-604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chandan V.A resolved OLINGO-604.
--------------------------------
    Resolution: Fixed

> Injected Entity Managers are closed after fetching query results
> ----------------------------------------------------------------
>
>                 Key: OLINGO-604
>                 URL: https://issues.apache.org/jira/browse/OLINGO-604
>             Project: Olingo
>          Issue Type: Bug
>          Components: odata2-jpa
>    Affects Versions: V2 2.0.4
>            Reporter: Chandan V.A
>            Assignee: Chandan V.A
>            Priority: Minor
>
> There is an issue with the way the result list is accessed in JPAProcessor method: private Object readEntity(final Object uriParserResultView, final JPQLContextType contextType)
> Currently (Olingo 2.03) accesses the Resultlist by following code snippet:
> …
> query = em.createQuery(selectJPQLStatement.toString());
>         if (!query.getResultList().isEmpty()) {
>           selectedObject = query.getResultList().get(0);
> …
> Because an injected entityprocessor (via proxy) from the Spring Framework, on the first access to query.getResultList() closes the entitymanager after the query transaction is done.
> Since the object is accessed in a separate call the entitymanager is closed and therefore we get an error “Attempting to execute an operation on a closed EntityManager."
> The solution is ..
> By assigning the ResultList to a List, the issue is solved:
> …
> query = em.createQuery(selectJPQLStatement.toString());
>                 final List resultList = query.getResultList();
>                 if (!resultList.isEmpty())
>                 {
>                     selectedObject = resultList.get(0);
>                 }
> …



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