Open Source CMIS implementation from eXo Platform released: xCMIS

eXo Platform Blog

Last week we announced that eXo Platform has built an open source implementation of OASIS’s Content Management Interoperability Services CMIS specification.  We licensed this under the LGPL license, and released it officially as xCMIS 1.0 beta1.

This release includes CMIS server with all the services implemented according to Content Management Interoperability Services (CMIS) Version 1.0 Committee Draft 06 for REST AtomPub and Web Services (SOAP/WSDL) protocol bindings. The project is hosted on the Google Code forge, check it out on  I wanted to take a few minutes to answer some of the most common questions from developers about the new xCMIS project.

What is the xCMIS project, and what does it do?

  • xCMIS is an open source, server side Java CMIS implementation that is able to expose the content in existing content repositories according to the protocols defined in the CMIS spec
  • xCMIS will give developers a way to make their content repositories “pluggable” on the server side – thanks to an internal Storage Provider Interface and additional protocol on-demand bindings
  • xCMIS will provide (several) CMIS client frameworks for repository-application and repository-repository interactions. The programming language and supported protocol can be selected by the user.  (For example, the reasonable choice for use with web applications, gadgets, and/or mashups is JavaScript or GWT over REST AtomPub, while for inter-repository exchange it may be Java over Web Services, i.e. WSDL/SOAP.)
  • Both the server and client sides of xCMIS are easily integrated in the eXo Platform 3.0 infrastructure. In particular, xCMIS exposes the eXo JCR content repository and provides a framework for building web applications and gadgets for the GateIn portal

Enough talk already!  How do I download and start to play with xCMIS on my local workstation?

The xCMIS server is packaged as a J2EE Web archive xcmis.war, which you can download and install on any Java servlet container.  Or, you can build it on your own from the source code by following these simple instructions.  Finally, the easiest option might be to use the “download and go” version that we prepared – it’s basically Apache Tomcat bundled with an xCMIS server on /xcmis context path.

By default the xCMIS server includes both REST AtomPub and Web Services (SOAP/WSDL) protocol bindings.

  • A Web Services (SOAP/WSDL) entry point can be accessed on http://localhost:8080/xcmis/cmisws.
  • REST AtomPub is accessible on http://localhost:8080/xcmis/rest/cmisatom – this is the URL of RepositoryService’s getRepository method. For more info about the CMIS services and methods in WADL format that are accessible via AtomPub protocol, go to http://localhost:8080/xcmis/wadl.html.
  • If you really wanted to get “under the hood”, you can explore the capabilities of xCMIS using curl or Poster FireFox add-on, or just try using the information from a WADL file.

The xCMIS bundle includes one CMIS repository with an empty eXo JCR and JCR WebDAV server inside.  The name of the JCR repository is “repository” 🙂 and the name of JCR workspace is “cmis”. So, it is possible to obtain access to the same content using WebDAV URL

If you want to save time, you can download the xCMIS server with a full-featured CMIS GWT UI gadget inside (loaded remotely from site). It can be run the same way as a bare server; then you can go to localhost:8080/xcmis/xcmis-demo-gadget/GadgetWrapper.html to check out the CMIS visually.  It should look like this:

The interface is pretty simple and intuitive, and includes a toolbar, right-button context menu, drag-and-drop features, etc.

How do I use xCMIS remotely?

We created the dedicated resource that has xCMIS deployed on the GateIn portal. Here you can find and use the CMIS Expert gadget, and a really cool CMIS Zoho gadget. This one demonstrates multiple CMIS implementations (xCMIS, Alfresco CMIS and Nuxeo CMIS) in action.  You can browse the different CMIS repositories, see the content stored within them, and most importantly – you can view and modify files in Zoho editor.

Feel free to build GateIn yourself and add a local xCMIS server as described in the wiki, or use a remote one ( – for REST AtomPub protocol).  However, you might want to note that xCMIS beta1 uses eXo JCR 1.12 CR1, so make sure you use an appropriate version of GateIn.  It should be at least as recent as GateIn 3.0 beta 5 (as of the Feb 11, 2010 release, only GateIn built using trunk is suitable!).

And, of course, it is possible to use third-party CMIS clients such as IBM CMIS Firefox Connector, CMIS Spaces Flex+AIR and (I am pretty sure) other clients that are compatible with CMIS 1.0, all in the same way described in the xCMIS wiki (just using a remote server).

What’s next for xCMIS?

  • The CMIS specification is close to the final state, so that means we’re close as well  – once CMIS is officially out, we’ll put out the final xCMIS release shortly after that 🙂
  • Open the source code for the GWT CMIS framework and move it to xCMIS project
  • Finalize the Storage Provider Interface architecture
  • Refactor the search engine, decoupling it from JCR storage
  • Refactor a CMIS configuration to make it more clear (trying different types of configurations for different IoC containers)
  • Add federated search between several types of CMIS repositories
  • Check out other types of clients
  • And other cool stuff… 🙂

We’d love to hear your feedback.  If you want to discuss the project, talk about new ideas, make suggestions for improving the documentation, or anything else, please get involved!

To learn more, check out the project Wiki:
To see the source code:
To download the binaries:

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