Resources

This release has been built against Java 8
Downloads [1]
Javadocs [2]

Team

Release Managers

Benjamin Armintor, Columbia University
Jared Whiklo, University of Manitoba

Developers

A. Soroka, University of Virginia
Unknown User (acoburn), Amherst College
Aaron Elkiss, University of Michigan
Andrew Woods, DuraSpace
Bethany Seeger, Amherst College
Esme Cowles, Princeton University
Jared Whiklo, University of Manitoba
Michael Durbin, University of Virginia
Nick Ruest, York University
Osman Din, Yale University
Scott Prater, University of Wisconsin-Madison
Yinlin Chen, Virginia Tech

Issue Reporters

A. Soroka, University of Virginia
Unknown User (acoburn), Amherst College
Andrew Woods, DuraSpace
Unknown User (daniel-dgi), discoverygarden inc.
David Chandek-Stark, Duke University
Elliot Metsger, Johns Hopkins University
Esme Cowles, Princeton University
Harsh Ummerpillai, University of Michigan
Hélder Silva, University of Minho
Jared Whiklo, University of Manitoba
Jason Sherman, University of Oklahoma
Jim Coble, Duke University
Justin Coyne, Stanford University
Nick Ruest, York University
Osman Din, Yale University
Peter Eichman, University of Maryland
Scott Prater, University of Wisconsin-Madison
Steve DiDomenico, Northwestern University
Stuart Chalk, University of North Florida
Trey Pendragon, Princeton University
Yinlin Chen, Virginia Tech

Summary

The Fedora 4.5.1 release furthers several major objectives:

Tighten the definition of the RESTful application programming interface (API)
Improving the Versioning capability
Re-establish performance test fixtures
Improve durability with MySQL and PostgreSQL backends
Fix bugs

Application Programming Interface

One of the technical priorities [3] of Fedora is to define a well-specified application programming interface (API) against which client applications can be written and future server-side implementations can be created. This Fedora API should be clear and detailed enough such that a corresponding technology compatibility kit [4] (TCK) would be able to indicate if any Fedora implementation fulfills or diverges from the specification. With this in mind, several issues were addressed in this release that clean up Fedora's RESTful interaction [5].

Deprecations: The following endpoints have been marked for future deprecation:

/fcr:import
/fcr:export
/fcr:nodetypes

Versioning

This release includes several bug fixes related to versioning [6]:

Resolves error encountered when GETting a version of a container that itself has versioned child resources
Resolves error encountered when GETting a version of a container that has a deleted child resource
Resolves inability to see description of binary resource versions

Web Access Control

This release furthers the Web Access Control [7] authorization module with several fixes [8], including:

Resolve error when creating versions in the context of WebAC
Provide WebAC "accessControl" Link header from effective ancestor

Additional documentation of Fedora's implementation of Web Access Controls is available on the wiki [9].

Performance

One of Fedora's perennial goals is "improved performance". With this as a focus, a Performance and Scalability working group [10] has progressed in the creation of repeatable, scripted tests that exercise and meter basic read/write operations. The objective of these tests is to reveal application bottlenecks and to track changes in performance as the reference Fedora implementation evolves.

Preservation

From a preservation perspective, this release includes support for alternative backend object stores to the default LevelDB. New configurations now exist for MySQL and PostgreSQL [11].

Housekeeping and Bugfixes

Numerous refactorings, bugfixes, and clean-up tasks were addressed in this release [12]:

References

[1]  https://wiki.duraspace.org/display/FF/Downloads
[2]  http://docs.fcrepo.org/
[3]  https://wiki.duraspace.org/display/FF/2015+-+2016+Technical+Priorities
[4]  https://en.wikipedia.org/wiki/Technology_Compatibility_Kit
[5]  https://jira.duraspace.org/browse/FCREPO-1977?jql=filter%3D13608%20
[6]  https://jira.duraspace.org/browse/FCREPO-1981?jql=filter%3D13612%20
[7]  http://www.w3.org/wiki/WebAccessControl
[8]  https://jira.duraspace.org/browse/FCREPO-1885?jql=filter%3D13609%20
[9]  https://wiki.duraspace.org/display/FEDORA451/WebAC+Authorization+Delegate
[10] https://wiki.duraspace.org/display/FF/Performance+and+Scalability
[11] https://wiki.duraspace.org/display/FEDORA451/Configuring+JDBC+Object+Store
[12] https://jira.duraspace.org/browse/FCREPO-2007?jql=filter%3D13613%20