Skip to main content

Jazoon 2007: Some more notes on last day

I'm just back from some dubbin' in Publin, I mean pubbin' in Dublin, so little time to write a full post. However, I did find the notes I lost from day 4 in Jazoon:

...

Last Day. Neil Gafter on closures.

First talk OSGi from Ergon Informatik.

The speaker is really happy with OSGi. It's great, it works really well, etc. Running osgi demo.

Bundles/plugins managed in a phone on a console app called J9 Console.

Goes on to talk about RCP. eSWT for embedded. Subset for SWT. Can run without RCP/osgi context if you don't need them.

JFace, gui toolkit. eJFace for embedded.

eWorkbench lets you bundle simul apps running. eUpdate is the update mechanism that is in eclipse. Pretty cool, the whole update manager is run on an embedded device.

Services can be shared between apps in the same VM.

Issues they have encountered in eRCP. Useful list.

Use JFace fonts and typesets to avoid memory leaks.

Some negative experiences.. Complex bundle dependencies. The services have states to manage, and this can be tricky to learn. Plus all the usual embedded ui issues.

...

Web 3.0/semantic web Q&A session with Henry Story following the previous session that we unfortunately did not attend.. Very interesting.

...

Java and SecondLife.

Seems like SL has potential in using resources as in uri resources...

Abit about the SL script language. The scripts are only evalutated when in the SL engine, client side.

Scripts can also call http requests that the SL server will shoot off to external servers. 1 KB limit on the response. An example is a SL phone booth that shoots off SMS requests to external servers.

The 1KB limit can be workaround by having the SL object being able to respond with packets. Note that client code cannot be changed once deployed many places.

Communication is used between the client and an external server but needs to be done through a remote channel. The external server then XML-RCPs to the external server.

The java library (a port of the C# library) for utilizing SL clients is somewhat dead, appearantly. But offers good control.

...

Sort of split in half when it comes to deciding on the next talk. It's either a very interesting presentation on Jackrabbit or a talk from Netcetera on the complexity of software.

After talking with David about Jackrabbit for a little while I decided to jump in on the talk bout Build-up of artificial complexity. A talk straight to my heart.

Code grows ugly. We all know the problem, so what is the solution? Discipline and modularity are old solutions. Reduce number of (external) components is another one. I like addressing every req with an external component. His advice is be sceptical and choose the frameworks/components you *like*.

People don't like being constrained away from their personal favourite tech stacks. Limitation is dangerous, so don't restrain too much.

Will read more of this stuff. Read Greene's essay, but can't find the article on the net. Will just have to wait for the slides to come online (nudge nudge, Jazoon).

Comments

Popular posts from this blog

Open source CMS evaluations

I have now seen three more or less serious open source CMS reviews. First guy to hit the field was Matt Raible ( 1 2 3 4 ), ending up with Drupal , Joomla , Magnolia , OpenCms and MeshCMS being runner-ups. Then there is OpenAdvantage that tries out a handful ( Drupal , Exponent CMS , Lenya , Mambo , and Silva ), including Plone which they use for their own site (funny/annoying that the entire site has no RSS-feeds, nor is it possible to comment on the articles), following Matt's approach by exluding many CMS that seem not to fit the criteria. It is somewhat strange that OpenAdvantage cuts away Magnolia because it "Requires J2EE server; difficult to install and configure; more of a framework than CMS", and proceed to include Apache Lenya in the full evaluation. Magnolia does not require a J2EE server. It runs on Tomcat just like Lenya does (maybe it's an idea to bundle Magnolia with Jetty to make it seem more lightweight). I'm still sure that OpenAdvant

Considerations for JavaScript in Modern (2013) Java/Maven Projects

Disclaimer: I'm a Java developer, not a JavaScript developer. This is just what I've picked up the last years plus a little research the last days. It's just a snapshot of my current knowledge and opinions on the day of writing, apt to change over the next weeks/months. We've gone all modern in our web applications, doing MVC on the client side with AngularJS or Ember , building single-page webapps with REST backends. But how are we managing the growing amount of JavaScript in our application? Yeoman 's logo (not necessarily the conclusion of this blog post) You ain't in Kansas anymore So far we've just been doing half-random stuff. We download some version of a library and throw it into our src/main/webapp/js/lib , or we use it from a CDN , which may be down or unreachable when we want to use the application.. Some times the JS is minified, other times it's not. Some times we name the file with version number, other times without. Some

What I've Learned After a Month of Podcasting

So, it's been about a month since I launched   GitMinutes , and wow, it's been a fun ride. I have gotten a lot of feedback, and a lot more downloads/listeners than I had expected! Judging the numbers is hard, but a generous estimate is that somewhere around 2000-3000 have listened to the podcast, and about 500-1000 regularly download. Considering that only a percentage of my target audience actively listen to podcasts, these are some pretty good numbers. I've heard that 10% of the general population in the western world regularly listen to podcasts (probably a bit higher percentage among Git users), so I like to think I've reached a big chunk of the Git pros out there. GitMinutes has gathered 110 followers on Twitter, and 63, erm.. circlers on Google+, and it has received 117 +'es! And it's been flattr'ed twice :) Here are some of the things I learned during this last month: Conceptually.. Starting my own sandbox podcast for trying out everythin

Managing dot-files with vcsh and myrepos

Say I want to get my dot-files out on a new computer. Here's what I do: # install vcsh & myrepos via apt/brew/etc vcsh clone https://github.com/tfnico/config-mr.git mr mr update Done! All dot-files are ready to use and in place. No deploy command, no linking up symlinks to the files . No checking/out in my entire home directory as a Git repository. Yet, all my dot-files are neatly kept in fine-grained repositories, and any changes I make are immediately ready to be committed: config-atom.git     -> ~/.atom/* config-mr.git     -> ~/.mrconfig     -> ~/.config/mr/* config-tmuxinator.git       -> ~/.tmuxinator/* config-vim.git     -> ~/.vimrc     -> ~/.vim/* config-bin.git        -> ~/bin/* config-git.git               -> ~/.gitconfig config-tmux.git       -> ~/.tmux.conf     config-zsh.git     -> ~/.zshrc How can this be? The key here is to use vcsh to keep track of your dot-files, and its partner myrepos/mr for o

Git Stash Blooper (Could not restore untracked files from stash)

The other day I accidentally did a git stash -a , which means it stashes *everything*, including ignored output files (target, build, classes, etc). Ooooops.. What I meant to do was git stash -u , meaning stash modifications plus untracked new files. Anyhows, I ended up with a big fat stash I couldn't get back out. Each time I tried, I got something like this: .../target/temp/dozer.jar already exists, no checkout .../target/temp/core.jar already exists, no checkout .../target/temp/joda-time.jar already exists, no checkout .../target/foo.war already exists, no checkout Could not restore untracked files from stash No matter how I tried checking out different revisions (like the one where I actually made the stash), or using --force, I got the same error. Now these were one of those "keep cool for a second, there's a git way to fix this"situation. I figured: A stash is basically a commit. If we look at my recent commits using   git log --graph --