Alfresco Developer Guide source code update for 3.2 Enterprise

I’ve updated the source code that accompanies the Alfresco Developer Guide to be compatible with the recent 3.2 Enterprise release of Alfresco. You can get the link from my original post on the source code re-org, or download it directly.

Most of it hasn’t changed terribly much. The BootstrapAuthorityCreator class, which you don’t need unless you are playing with the AMP example in Appendix C, isn’t working yet due to changes in the AuthorityService with 3.2 Enterprise.

The biggest change is in the LDAP configuration (Chapter 9). Overall, setting up LDAP authentication and chaining has gotten much easier in 3.2 Enterprise. But the configuration is much different than in previous releases (See the Alfresco wiki pages on Subsystems and the Authentication Subsystem for more info).

I don’t have CAS SSO working with 3.2 Enterprise quite yet, so the authentication filter included in the Chapter 9 source code is commented out for now.

cmislib: A CMIS client library for Python

I’ve started a new project on Google Code called cmislib. It is an interoperable client library for CMIS in Python that uses the Restful AtomPub Binding of a CMIS provider to perform CRUD and query functions on the repository.

I created it for a couple of reasons. First, it’s been bugging me that, unlike our Drupal Alfresco integration, our Django Alfresco integration does not use CMIS. After talking it over with one of our clients we decided it would make more sense to create a more general purpose CMIS API for Python that Django (and any other Python app) could leverage, rather than build CMIS support directly into the Django Alfresco integration.

Second, around the time I was putting together the Getting Started with CMIS tutorial, it struck me that there needed to be an API that didn’t have a lot of dependencies and was very easy to use. Otherwise, it’s too easy to get lost in the weeds and miss the whole point of CMIS: Easily working with rich content repositories, regardless of the underlying implementation.

Even if you’ve never worked with Python before, it is super easy to get started with cmislib. The install is less than 3 steps and the API should feel very natural to anyone that’s worked with a content repository before. Check it out.

Install

  1. If you don’t have Python installed already, do so. I’ve only tested on Python 2.6 so unless you’re looking to help test, stick with that.
  2. If you don’t have setuptools installed already, do so. It’s a nice tool to use for installing Python packages.
  3. Once setuptools is installed, type easy_install cmislib

That’s all there is to it. Now you’re ready to connect to your favorite CMIS-compliant repository.

Examples

There’s nothing in cmislib that is specific to any particular vendor. Once you give it your CMIS provider’s service URL and some credentials, it figures out where to go from there. But I haven’t tested with anything other than Alfresco yet, and this thing is still hot out of the oven. If you want to help test it against other CMIS 1.0cd04 repositories I’d love the help.

Anyway, let’s look at some examples using Alfresco’s public CMIS repository.

  1. From the command-line, start the Python shell by typing python then hit enter.
    2. Python 2.6.3 (r263:75183, Oct 22 2009, 20:01:16)
GCC 4.2.1 (Apple Inc. build 5646)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>
  2. Import the CmisClient and Repository classes:
    3. >>> from cmislib.model import CmisClient, Repository
  3. Point the CmisClient at the repository’s service URL
    4. >>> client = CmisClient('http://cmis.alfresco.com/s/cmis', 'admin', 'admin')
  4. Get the default repository for the service
    5. >>> repo = client.getDefaultRepository()
>>> repo.getRepositoryId()
u'83beb297-a6fa-4ac5-844b-98c871c0eea9'
  5. Get the repository’s properties. This for-loop spits out everything cmislib knows about the repo.
    6. >>> repo.getRepositoryName()
    u'Main Repository'
>>> info = repo.getRepositoryInfo()
>>> for k,v in info.items():
    ...     print "%s:%s" % (k,v)
    ...
    cmisSpecificationTitle:Version 1.0 Committee Draft 04
    cmisVersionSupported:1.0
    repositoryDescription:None
    productVersion:3.2.0 (r2 2440)
    rootFolderId:workspace://SpacesStore/aa1ecedf-9551-49c5-831a-0502bb43f348
    repositoryId:83beb297-a6fa-4ac5-844b-98c871c0eea9
    repositoryName:Main Repository
    vendorName:Alfresco
    productName:Alfresco Repository (Community)

Once you’ve got the Repository object you can start working with folders.

  1. Create a new folder in the root. You should name yours something unique.
    2. >>> root = repo.getRootFolder()
>>> someFolder = root.createFolder('someFolder')
>>> someFolder.getObjectId()
u'workspace://SpacesStore/91f344ef-84e7-43d8-b379-959c0be7e8fc'
  2. Then, you can create some content:
    3. >>> someFile = open('test.txt', 'r')
>>> someDoc = someFolder.createDocument('Test Document', contentFile=someFile)
  3. And, if you want, you can dump the properties of the newly-created document (this is a partial list):
    4. >>> props = someDoc.getProperties()
>>> for k,v in props.items():
...     print '%s:%s' % (k,v)
...
cmis:contentStreamMimeType:text/plain
cmis:creationDate:2009-12-18T10:59:26.667-06:00
cmis:baseTypeId:cmis:document
cmis:isLatestMajorVersion:false
cmis:isImmutable:false
cmis:isMajorVersion:false
cmis:objectId:workspace://SpacesStore/2cf36ad5-92b0-4731-94a4-9f3fef25b479
  4. You can also use cmislib to run CMIS queries. Let’s find the doc we just created with a full-text search. (Note that I’m currently seeing a problem with Alfresco in which the CMIS service returns one less result than what’s really there):
    5. >>> results = repo.query("select * from cmis:document where contains('test')")
>>> for result in results:
...     print result.getName()
...
Test Document2
example test script.js
  5. Alternatively, you can also get objects by their object ID or their path, like this:
    6. >>> someDoc = repo.getObjectByPath('/someFolder/Test Document')
>>> someDoc.getObjectId()
u'workspace://SpacesStore/2cf36ad5-92b0-4731-94a4-9f3fef25b479'

Set Python loose on your CMIS repository

These are just a few examples meant to give you a feel for the API. There are several other things you can do with cmislib. The package comes with documentation so look there for more info. If you find any problems and you want to pitch in, you can check out the source from Google Code and create issues there as well.

Give this a try and let me know what you think.

[UPDATE: I had the wrong URL for the Alfresco-hosted CMIS service. It’s fixed now.]

Spring, Roo, and Alfresco Too: What Alfresco Gave to Spring and Why

Surf Logo

You’ll recall from my community event takeaways post in November that Alfresco announced plans around Surf, the Apache license, and Spring but the details were foggy at the time. This week, Alfresco and SpringSource announced that Surf, Web Scripts, and Web Studio have been donated to the Spring open source community under the Apache 2.0 license.

What is Surf?

Surf is a lightweight web application development framework. At a very high-level, Surf is essentially Alfresco Web Scripts (an MVC framework for binding URLs to server-side JavaScript/Java and Freemarker-based views) plus some page layout constructs and some built-in objects for connecting to and authenticating with remote HTTP end points, including Alfresco (See also “Alfresco UI Options” and “Surf Code Camp“).

Why Spring Surf Makes Sense

Alfresco’s team collaboration application, Alfresco Share, is built on top of the Surf framework and clients and partners, including Optaros, have built solutions on top of Surf. But so far, our experience has been that we probably could have built solutions faster using a different framework. One of the reasons is because you often can’t do everything you need to with Surf alone–it lacks services that would normally be provided by a broader framework. Your choice is either to re-create what’s missing or bolt on something that exists. So that’s the first reason why Surf becoming part of Spring makes sense. Spring is already a mature and widely-adopted framework. It’s much better to make Surf and Web Scripts part of an established framework (and community) than to try to grow Surf into a full-featured framework.

The second reason is more strategic. Alfresco sees a future dominated by CMIS (See “Getting Started with CMIS“). They want to be the go-to CMIS platform. From a repository perspective, they’ve been very active on this front. But development tools are going to be important, and although part of the beauty of CMIS is that it is tool-agnostic, I think SpringSource and Alfresco would obviously be pleased if their framework became a very natural and productive way to build CMIS apps.

Third, Alfresco doesn’t necessarily want to spend a lot of time on tools and frameworks if it doesn’t have to. Look at how much time Web Studio has languished in Community limbo–it’s clearly not a priority. If Surf catches on in the broader Spring community maybe Web Studio has a chance to turn into something. My guess is that SpringSource would prefer all development to take place within STS, its Eclipse-based IDE. Maybe Web Studio will get sucked into that somehow.

So what is Roo?

One of the things mentioned as part of the Spring Surf announcement is that Spring Roo integration is included. Spring Roo is pretty new so you might be wondering what that is. It’s pretty cool, actually. Basically, it’s a productivity tool for people who are building Spring apps. If you’ve ever worked with frameworks like Ruby on Rails, Grails, or Django, one of the first things you learn is how to use the command-line project scaffolding tools. Those tools make it easy for you to spin up and configure your project. Spring Roo is similar–it gives you a shell and a bunch of commands for things like setting up persistence, adding unit tests, and configuring security.

Spring Roo is extensible which is where Surf comes in. Let’s say you’ve created a Spring project and you want to use Surf as part of that project. All you have to do is go into your Roo shell and type “surf addon install”. No monkeying with the web.xml. No hunting for JAR files. It just happens. Next, suppose you want to add some Surf pages. Type “surf page create –id ‘SomeOtherPage’ –templateInstance home” and the XML is created for you in the right place (yes, the shell provides keyboard assist and hints so you don’t have to remember those commands).

Roo is definitely better appreciated by seeing it or trying it yourself. Michael Uzquiano did a short screencast showing the Spring Roo Surf extension. If you want to try Roo out yourself, go through Ben Alex’s “Getting Started with Spring Roo” posts.

Learn More

The bottom-line is that Surf becoming part of the Spring community is a good thing. You should check it out. The official Spring Surf page is the place to start. That’s where you’ll find the SVN URL, binary downloads, and links to other resources. There’s also going to be a webinar in January if you want to learn more.

Forrester says 2010 looks good for ECM

Forrester has released the results from its 2009 Global Enterprise Content Management Online Survey. Here are a few of the things that jumped out at me…

72% of respondents plan on increasing their ECM investments in the coming year. That’s certainly good news. Of those increasing their investment, the big drivers are content sharing, compliance, search, and automation, which are all typical reasons to roll out a content management solution.

When asked to list the vendors that supply them with ECM solutions, 63% of respondents included Microsoft with EMC a distant second at 35%. (I kind of expected that Microsoft number to be higher). OpenText/Vignette (29%) and IBM (28%) were clustered right around there with a third clump forming around Autonomy/Interwoven (19%), Oracle (17%), and Alfresco (14%). The only other open source ECM players explicitly named were KnowledgeTree and Nuxeo, each with 1%. Almost a third of respondents also listed “Other, please specify” but Forrester doesn’t provide the list of write-ins. I assume it is a bunch of small, niche or homegrown solutions because the usual suspects were listed as explicit choices. Still, this chart and the one following that shows that nearly 3/4 of respondents have 2 or more ECM solutions in-house confirms what we’ve seen in our Optaros clients: Most people haven’t settled on a single ECM provider.

A little more than 1 in 4 of respondents were unsatisfied with their ECM solution. Of those, 41% blamed the solution itself as failing to “live up to expectations” followed by the usual grab bag of non-technical reasons IT projects fail. I would have liked to see a follow-up that dissected the various ways the solution fell short. Was it not able to do something you thought it was going to be able to do? Was stability an issue? Scale? Bad support experience? Or was it just that the beans you were told were magic turned out to be just plain old beans?

As my college stats teacher was fond of saying, “There are three kinds of lies: Lies, Damn Lies, and Statistics,” so take all of this with a grain of salt.

Book Review: Django 1.0 Web Site Development

I just finished “Django 1.0 Web Site Development” by Ayman Hourieh (2nd Ed). Packt sent me a copy and I was happy to read it. I thoroughly enjoy Python and Django and would like to see it more broadly adopted, so anything that helps people get started is a good thing.

Ayman’s book is clean and crisp. The book is built around a single cohesive example: Building a Delicious-style collaborative bookmark application with Django. That was a great pick for an example app. It’s easy to get your head around yet broad enough to provide good coverage of the topic. I also liked that Ayman threw in some JQuery to add a few AJAX features to the app. It was just the right amount to give you the idea without turning into a book on AJAX or UX development. Readers are similarly spared from wasting too much time on look-and-feel. CSS is kept to a minimum so that the focus remains squarely on Django.

Ayman flows logically from topic to topic. The book starts with a simple example and then gradually adds features until you’ve got a decent little app by the end. Within and between topics, the reader always has a good feel for what’s going on and what’s coming next. Initially, I was surprised that the admin UI–one of the cool time-saving features of Django that comes out of the box–was covered so late in the book, but later I decided that Ayman’s decision to focus on the shell to show API examples and test the app’s back-end was the right way to go. Chapter 12 is pretty weak–I would have traded most of the “ideas for evolving your bookmarking app” content for a discussion around Django on Google App Engine or maybe go deeper on some of the more interesting topics in that chapter that are only briefly covered, but that’s a minor nitpick.

I really enjoyed this book. Can you tell? Part of it is that Python and Django are such a pleasure to work with. The book itself is almost a metaphor: It’s concise (250 pages), well-written, and fun. If you’re new to the framework this book is a good way to see what all of the fuss is about.

New Tutorial: Getting Started with CMIS

I’ve written a new tutorial on the proposed Content Management Interoperability Services (CMIS) standard called, “Getting Started with CMIS“. The tutorial first takes you through an overview of the specification. Then, I do several examples. The examples start out using curl to make GET, PUT, POST, and DELETE calls against Alfresco to perform CRUD functions on folders, documents, and relationships in the repository. If you’ve been dabbling with CMIS and you’ve struggled to find examples, particularly of POSTs, here you go.

I used Alfresco Community built from head, but yesterday, Alfresco pushed a new Community release that supports CMIS 1.0 Committee Draft 04 so you can download that, use the hosted Alfresco CMIS repository, or spin up an EC2 image (once Luis gets it updated with the new Community release). If you don’t want to use Alfresco you should be able to use any CMIS repository that supports 1.0cd04. I tried some, but not all, of the command-line examples against the Apache Chemistry test server.

Once you’ve felt both the joy and the pain of talking directly to the CMIS AtomPub Binding, I take you through some very short examples using JavaScript and Java. For Java I show Apache Abdera, Apache Chemistry, and the Apache Chemistry TCK.

For the Chemistry TCK stuff, I’m using Alfresco’s CMIS Maven Toolkit which Gabriele Columbro and Richard McKnight put together. That inspired me to do my examples with Maven as well (plus, it’s practical–the Abdera and Chemistry clients have a lot of dependencies, and using Maven meant I didn’t have to chase any of those down).

So take a look at the tutorial, try out the examples with your favorite CMIS 1.0 repo, and let me know what you think. If you like it, pass it along to a friend. As with past tutorials, I’ve released it under Creative Commons Attribution-Share Alike.

[Updated to correct typo with Gabriele’s name. Sorry, Gab!]

Top Five Alfresco Roadmap Takeaways

Now that the last of the Alfresco Fall meetups has concluded in the US, I thought I’d summarize my takeaways. Overall I thought the events were really good. The informative sessions were well-attended. Everyone I talked to was glad they came and left with multiple useful takeaways.

Everyone has their own criteria for usefulness–for these events my personal set of highlights tend to focus on the roadmap. So here are my top five roadmap takeaways from the Washington, D.C., Atlanta, and LA meetups.

1. Repository unification strategy revealed

Now we know what Alfresco plans to do to resolve the “multiple repository” issue. In a nutshell: Alfresco will add functionality to the DM repository until it is on par with the AVM (See “What are the differences…“). What then? The AVM will continue to be supported, but if I were placing bets, I would not count on further AVM development past that point.

This makes a lot of sense to me. We do a lot of “WCM” for people using the Alfresco DM repository, especially when Alfresco is really being leveraged as a core repository. It also makes sense with Alfresco’s focus on CMIS (see next takeaway) because you can’t get to the AVM through CMIS.

2. CMIS, CMIS, CMIS

Clearly, CMIS is an important standard for Alfresco. (In fact, one small worry I have is that Alfresco seems to need CMIS more than any of the other players behind the standard, but I digress). Alfresco wants to be the go-to CMIS repository and believes that CMIS will be the primary way front-ends interact with rich content repositories. They’ve been on top of things by including early (read “unsupported”) implementations of the draft CMIS specification in both the Community and Enterprise releases, but there a number of other CMIS-related items on the roadmap:

  • When the CMIS standard is out of public review, Alfresco will release a “CMIS runtime”. Details are sketchy, but my hunch is that Alfresco might be headed toward a Jackrabbit/Day CRX model where Alfresco’s CMIS runtime would be like a freely-available reference CMIS repository (Alfresco stripped of functionality not required to be CMIS compliant) and the full Alfresco repository would continue as we know it today. All speculation on my part.
  • Today deployments are either FSR (Alfresco-to-file system) or ASR (Alfresco AVM to Alfresco AVM). The latter case is used when you have a front-end that queries Alfresco for its content but you want to move that load off of your primary authoring server. In 3.2, the deployment service has gotten more general, so it’s one deployment system with multiple extensible endpoint options (file system, Alfresco AVM, CouchDB, Drupal, etc.). Alfresco will soon add AVM-to-CMIS deployment. That means you can deploy from AVM to the DM repository. Does it mean you can deploy to any CMIS repository? Not sure. If not, that might be a worthwhile extension.
  • One drawback to using DM for WCM currently is that there is not a good deployment system to move your content out of DM. It’s basically rsync or roll-your-own. On the roadmap is the ability to deploy from DM instead of AVM. This is one of the features the DM needs to get it functionally equivalent to what you get with the AVM. I wouldn’t expect it until 4.0.

3. Shift in focus to developers

Alfresco WCM has always been a decoupled system. When you install Alfresco WCM you don’t get a working web site out-of-the-box. You have to build it first using whatever technology you want, and then let Alfresco manage it. So, unlike most open source CMS’, it’s never been end-user focused in the sense of, “I’m a non-technical person and I want a web site, so I’m going to install Alfresco WCM”. Don’t expect that to change any time soon. Even Web Studio, which may not ever make it to an Enterprise release, is aimed at making Surf developers productive, not your Marketing team.

Alfresco is realizing that many people discard the Alfresco UI and build something custom, whether for document management, web content management, or some other content-centric use case. To make that easier, Alfresco is going to rollout development tools like Eclipse plug-ins, Maven compatibility, and Spring Roo integration (Uzi’s Spring Roo Screencast, Getting Started with Spring Roo ).

Alfresco has also announced that web scripts, web studio, and the Surf framework will be licensed under Apache and there were allusions to “making Surf part of Spring” or “using Surf as a Tiles replacement”. I haven’t seen or heard much from the Spring folks on this and I noticed these topics were softened between DC and LA, but that could have just been based on who was doing the speaking (see “What do you think of Alfresco’s multi-event approach?“).

Essentially what’s going on here is that Alfresco wants all of your future content-centric apps and even web sites to be “CMIS applications”, and Alfresco believes it can provide the best, most productive development platform for writing CMIS apps.

4. Stuff that may never happen but would be cool if it did

This is a grab bag of things that are being considered for the roadmap, but are far enough out to be uncertain. Regardless of if/when, these are sometimes a useful data point for where the product is headed directionally.

  • Native XML support. Right now Alfresco can manage XML files, obviously, but, unlike a native XML database like eXist or MarkLogic, the granularity stops with the file. Presumably, native XML support would allow XML validation, XPath and XQuery expressions running against XML file content, and better XSLT support.
  • Apache Solr. I think the goal here is to get better advanced search capability such as support for faceted search, which is something Solr knows how to do.
  • Repository sharding. This would be the ability to partition the repository along some (arbitrary?) dimension. Sharding is attractive to people who have very, very large repositories and want to distribute the data load across multiple physical repositories, yet retain the ability to treat the federation as one logical repo.

5. Timeline

Talk to Alfresco if you need this to be precise, but here’s the general idea of the timeline through 4.0 based on the slides I saw:

  • 3.2 Enterprise 12/2009
  • CMIS 1.0 Release Spring 2010
  • 3.3 Enterprise 1H 2010
  • 4.0 Enterprise 12/2010 (more likely 2011)

Thanks, Alfresco, and everyone who attended

Lastly, thanks to Nancy Garrity and the rest of the team that put these events together. I enjoyed presenting on Alfresco-Drupal in Atlanta and giving the Alfresco Best Practices talk (Alfresco Content Community login required).

I always enjoy the informal networking that happens at these events. There’s such a diverse group of experience levels, use cases, and businesses–it makes for interesting conversations. And, as usual, thanks to the book and blog readers who approached me. It always makes me happy to hear that something on your project was better for having read something I wrote. It was good meeting you all and I’m looking forward to the next get-together.

What do you think about Alfresco’s multi-city event approach?

Alfresco is getting big enough to warrant a regular get-together. So far, the approach has been to have multiple, smaller events rather than one big one as is done by traditional vendors. Over the past few weeks I’ve been wondering if the multi-event model makes sense. I get the concept: Theoretically it boosts attendance and helps attendees contain costs because people don’t have to travel as far–the conference comes to you.

But there are a few problems with the approach:

  1. you can never pick enough cities in the right places to reduce the travel burden to zero for everyone,
  2. partners and sponsors have to attend multiple events to get full coverage, and
  3. it’s tough to ensure consistent delivery of information across multiple events.

Regarding the first two, I would think anyone contemplating an Alfresco rollout (or already a paying customer) would be able to find budget to travel to a conference, even in times such as these. Integrators also make up a significant portion of the audience, but I think they would also be able to justify the trip based on the valuable lessons learned, new ideas sparked, etc. I would also guess that partners and vendors might be more willing to sponsor the conference if there were a single event rather than multiple smaller events because they get more eyeballs for one spend.

If these were the only two issues, I’d say it doesn’t matter. You’re either going to travel to the conference or you’re going to get lucky and not have to because the event is in your city. And partners who can afford sponsorships can also afford to send people to multiple cities to get the coverage they want (thanks, Optaros).

The third problem needs fixing. As someone who saw the same agenda delivered three times, I was struck by how different the morning sessions were in each of the three cities:

  • If you missed Washington D.C., you missed John Newton’s unique spin on CMIS, his statement that in Alfresco 4.0 he would “finish off the Explorer client”, and his thoughts on the cloud.
  • If you missed Atlanta, you didn’t get to hear Michael Uzquiano talk about the future of the product he manages, Alfresco WCM, and Alfresco’s plan to converge on the DM repository going forward.
  • If you missed LA, you didn’t see Luis Sala’s Amazon EC2 demo and you didn’t hear Dr. Ian Howells’ take on where the ECM market is heading.

In all three cases the content was similar (Alfresco is growing, CMIS, Records Management, and the cloud are important, the roadmap is exciting), but the delivery and the talking points were very different because the speakers each have their own unique perspective, careabouts, and role within Alfresco. Is that a big deal? Maybe, maybe not. The point is that the three events were decidedly different, and in hindsight, were travel not an issue, you might have picked one over another based on who was speaking on which topic.

I definitely don’t want to take away from the events and the planning and coordination it must have taken to pull them all off. I’m just thinking out loud and wondering about your opinion:

  • Would Alfresco be better off having a single event or should they continue with the multi-city approach?
  • Would your opinion change if you had to pay a significant registration fee to defray the cost of a larger venue? (I have no idea how the costs compare between the two models, I just assume a big room in Vegas is more expensive than three small rooms in assorted Marriotts).
  • What if Alfresco dove-tailed the conference with a broader conference like JavaOne or SpringOne? Aside from the obvious cross-pollination possibilities, does it make it easier for you to justify the expense?

Django + Alfresco was a winning combination for retailer’s intranet

Last week I spent some time with one of our clients talking about what it’s been like to live with their Intranet platform based on Django and Alfresco. The conversation got me really excited about what they’ve been able to do since the original implementation and where they are heading.

The client is a well-known, high-end retailer based in Dallas. About a year ago they engaged Optaros to replatform their intranet from a legacy Java portal product to something more agile. They had seen Alfresco and liked it as a core repository, but needed something for the presentation tier (See “Alfresco User Interface: What are my options?“).

The Optaros team worked with the client to consider many options, including open source Java portal servers. The client felt like they needed something lighter and more flexible than a portal server. They were willing to do a lot of the presentation work themselves in exchange for complete design freedom and yet still be enough of a framework to be highly productive. The winning solution turned out to be Django.

Python? No problem.

I was initially worried that introducing a Python-based framework into a Java shop was going to be a problem but they weren’t married to Java. Our team got them up-to-speed quickly and they never looked back. It also helped that the client’s intranet sites were very communication-centric which matched up well with Django’s newspaper heritage.

Here’s how they use the solution in a nutshell:

  • Content owners use Alfresco Explorer to upload HTML chunks, office documents, and images, set metadata, and submit content for review. This triggers any number of rules that automatically process the changed content (e.g., creating thumbnails, extracting metadata, converting images to a consistent type, creating PDFs from office documents).
  • Content owners and reviewers can use Alfresco’s “custom views” to preview the content chunk in the context of the front-end site.
  • Site designers lay out site pages and create components using the Django template system, CSS, JQuery, and other front-end libraries.
  • Content publishers use the Django administration UI to map areas on the site to categories, folders, and objects in the Alfresco repository–Alfresco has no idea where or how the chunks are being used. This means the repository tier is truly decoupled from the presentation tier, allowing the client to reuse content across multiple areas of the site and across multiple sites within the enterprise.
  • Designers leverage a Django tag library to create dynamic areas of a page (e.g., when the page is rendered, retrieve all of the content chunks in this particular category from the repository). Django calls Alfresco web scripts to get and post data. The web scripts respond with serialized Django XML which Django caches and then deserializes into Django objects that the front-end can work with.

Separate concerns, play to strengths

The thing to notice about the Alfresco piece is how it sticks to core Alfresco capabilities: Metadata, rules, search, basic workflows, transformers/extractors, presentation templates, web scripts, DM repository. This is straight out of the Alfresco best practices playbook and aligns the client well with Alfresco product direction. A nice enhancement would be to refactor the Django-Alfresco integration to use CMIS which is something we are considering for the open source version of the integration (Screencast, Code).

Agile intranet, happy team

Since the initial rollout, the client has been able to make changes and roll out new sites quickly and easily thanks to the productivity inherent in the Django framework and the clean separation between the front-end app and the repository. Unexpected benefits the client mentioned were how fast they can add new features to the administrative UI (a core admin UI gets built for you automatically by Django) and the ease with which the development team can stand up a new environment.

The language the client team used to describe their work since the rollout summed it up best. They were using words like “beautiful” and “a real pleasure to work with”. When was the last time you heard those sentiments expressed about a WCM implementation?