[jira] [Updated] (JCR-3534) Add JackrabbitSession.getValueByContentId method

["Felix Meschberger (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JCR-3534?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Felix Meschberger updated JCR-3534:
-----------------------------------

    Attachment: JCR-3534.patch

Proposed patch adding the new API.

To access the DataStore item by its ID I converted one method from InternalValue from package private to public since the InternvalValue.create(DataStore, String) method cannot be used: The getContentIdentifier method does not return the store prefix required by the create(DataStore, String) method. Also the create method does not validate the existence of a data store entry for the provided identifier.
                
> Add JackrabbitSession.getValueByContentId method
> ------------------------------------------------
>
>                 Key: JCR-3534
>                 URL: https://issues.apache.org/jira/browse/JCR-3534
>             Project: Jackrabbit Content Repository
>          Issue Type: New Feature
>            Reporter: Felix Meschberger
>         Attachments: JCR-3534.patch
>
>
> we have a couple of use cases, where we would like to leverage the global data store to prevent sending around and copying around large binary data unnecessarily: We have two separate Jackrabbit instances configured to use the same DataStore (for the sake of this discussion assume we have the problems of concurrent access and garbage collection under control). When sending content from one instance to the other instance we don't want to send potentially large binary data (e.g. video files) if not needed.
> The idea is for the sender to just send the content identity from JackrabbitValue.getContentIdentity(). The receiver would then check whether the such content already exists and would reuse if so:
> String ci = contentIdentity_from_sender;
> try {
>     Value v = session.getValueByContentIdentity(ci);
>     Property p = targetNode.setProperty(propName, v);
> } catch (ItemNotFoundException ie) {
>     // unknown or invalid content Identity
> } catch (RepositoryException re) {
>     // some other exception
> }
> Thus the proposed JackrabbitSession.getValueByContentIdentity(String) method would allow for round tripping the JackrabbitValue.getContentIdentity() preventing superfluous binary data copying and moving. 
> See also the dev@ thread http://jackrabbit.markmail.org/thread/gedk5jsrp6offkhi

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira