Archive for March 2008

Fixing bugs and design errors in XPontus

I made lots of design errors in the last release of XPontus XML Editor. I didn't have time to rewrite many parts of the application, it would have delayed the 1.0.0.1 release. I'll try to fix all reported bugs for the 1.0.0.2 version. In the next release, I'll switch from Maven to Apache Ivy for dependencies management. Ivy is simple and anyone will be able to open XPontus if the ivyIDE plugin is installed in Eclipse.

I've been thinking about the plugin manager lately. I might finish it sooner than expected.

Lots of people have been asking me if I wrote the plugin framework that XPontus is using. I didn't. Yes, I could have wrote one, but there are more and more plugin frameworks available now. Lots of projects have developed their own plugin framework, made it evolve over the years, and they have been happy with it. As OSGI is more popular among common Java developers, guys are looking at Eclipse equinox implementation or Apache Felix.

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Multi-platform deployment

Java is multi-platform but Java applications don't behave the same on different OS. I was disappointed to see that XPontus is ugly on Vista. The tab names are in white color, while Windows Vista use translucent windows so... the tab names are almost invisible...

Is it reasonable to build installers for platforms I can't even test on??When a user is telling me, on windows vista I see that... On Vista, multiple pages printing doesn't work... what can I do?? Most of the time I run Linux, I do have Windows installed to perform XPontus tests but I don't really use Windows that often...

Sometimes I have an idea about what a problem is related to, on Vista or Mac but still... I don't have a Mac, I don't have Vista(which seems to be used a lot now)... I can't test on it

So basically I'm running Debian Linux all the time, building installers for OS which can run Java without testing it on those platforms.

I should probably add a notice on the XPontus homepage NEVER BEEN TESTED ON WINDOWS VISTA AND MAC

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What build tool to use for java development?

People who checkout the XPontus XML Editor's code in the subversion repository expect to open it as a simple Java project in their Java IDE. Well, it's not a simple Java project, it's a Java maven based project.

I use Netbeans and I don't have any problems with Maven. Eclipse and IDEA plugins for Maven are "ALMOST USELESS" compared to what Netbeans provides in terms of usability and flexibility...

I've been more than happy with Maven( manage multiple projects and their dependencies, compile, run , test the applications, generate some websites, etc.)

I do believe that simple Java projects or simple multi-projects ("with few projects as dependencies") don't require an advanced build tool : use your IDE to manage the java classpath or create a simple Ant build file and you're done.

Lately, I've been looking at Apache Ivy as a replacement for Maven to build XPontus. Maven is preventing new members to get started quickly(learn maven, understand its usage in XPontus, etc.). I don't want to have to say all the time something like "Use Netbeans to ease the pain if you never used Maven..."

I don't mind using IVY or Apache Ant when starting a Java project. However if the project is already entirely built using Maven, it sucks to switch to another build system.

Personally, I think about switching toIvy as a regression at the moment:

  • Most IDEs don't have a "fantastic IVY support". It does work but that's it.
  • If most Java developers don't use Maven, do they use Ivy? I don't think so... The learning curve is shorter than Maven but still...
  • Ivy won't do the Maven black magic :-( ... (build some website pages, etc.)
  • Multiproject support?? Will I have to go back to the standard way of creating multi-projects in popular Java IDES?? I'll need to read about that.
The creator of IVY made some intersting comments on IVY vs Maven :
http://xhab.blogspot.com/2006/09/antivy-vs-maven-my-biased-opinion.html

New members of XPontus team will probably be able to use Apache Ivy easily. I guess I'll need to add in capital letters "YOU NEED THE IVY IDE PLUGIN TO OPEN THE PROJECT". I don't really expect lots of people to read it or to read instructions on how to open a XPontus as a Java project. Most developers know how to open a standard Java Project in an IDE, so they'll probably think "yeah must be some newbie stuff..."

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What happen when new users join a team??

As some users are joining XPontus XML Editor project, I have to write quickly a readable and simple documentation.
Who will bother read 500 pages of text before programming? Not me at least!! I have used Hibernate but never read the whole manual. Same goes with other technologies I have used(Apache Cocoon, Wicket, JSF, etc...)

I assumed that most people in the industry use Maven which is not true. I work for a non lucrative company and we use maven a lot. Most people don't use Maven at all, they know about it, they know what some guys have been doing with it, but that's all. Well, I can understand them, why bother with a tool if you feel you don't need it?

I have been using Maven for about 4 years. It has its pros and cons. I think that a simple Java project don't require Maven. It's just overkill.

With XPontus new members, I got to fill the gap between what I know and what others don't:

  • The learning curve of newcomers shouldn't be high.
  • The unfinished developer guide should be done and should almost make it look easy

Basically, I use Maven at 10% of its capabilities. With Apache Maven I do the following steps :
  • Compile and run the program(manage dependencies too)
  • Generate the website
  • Generate the java web start installer and sign the jar files
I could also commit to subversion, deploy the website using SFTP, all that with maven, but I don't.

I noticed that Eclipse has a poor maven support. I use Eclipe time to time but that's it. I switched to Netbeans 2 years ago. Netbeans has great maven support compared to others IDEs.
So when a guy, is telling me "what do I do in Eclipse to do...", in Netbeans it would be a simple click... I might need to switch to Eclipse to come up with good answers as most people are using Eclipse.


I am very excited that some guys are showing interest in XPontus. So what I though was clear in my mind, I have to explain to others and be patient. They have to be patient with themselves too!

XPontus is not like Eclipse, but I don't think average guys could code it in a week. I made some choices which are sometimes good, but sometimes they have limitations. I will rewrite some parts of XPontus when I'll feel that the team has a good understanding of XPontus architecture.

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XPontus XML Editor 1.0.0.1 is out

I released XPontus XML Editor yersterday night. I didn't release it on monday as planned. I was very tired. I was like don't test like a blind man, don't write bullshit to announce the release, anything can happen if I'm too worn out.

Now is the time to complete the documentation(user guide, developer guide), keep on testing, etc. Can I write a comprehensive developer guide?

I'll take a short break(1 week or less) to look at XPontus from a distance. What did I miss? Is it as stable as I thought it was when releasing? Are there too many bugs? Is it usable? What can be done to improve the architecture....?

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Too many bugs in XPontus

Will I release, should I release now? I've been delaying it forever...

I found so many bugs in XPontus today.... Lots of people have been helping me test the software. There are lots of usability issues. I know that XPontus is not at the same level than XML Spy for example, but still... There are some obvious problems I didn't see. Instead of testing the application all the time by myself, I should ask lots of people to help me test it... Couple of guys have been trying the Java Web Start snapshots, but they don't always fit with the "normal user profile" because :
- They understand or can evaluate the amount of work behind XPontus features and architecture. They may have already encountered the issues that I face.
- They are used to XML technologies

Here's what was done today:

  • I tested few installers. I had a silly mistake in the user settings , preventing the application to start even when the installation was successful.
  • I've been fixing bugs in the schema generator/converter plugin. That plugin takes XML or a Schema/DTD as input and generate a schema(relax ng, dtd or xml schema). Because it can perform generation or conversion between DTD and other schemas, I used the name "schema generator/converter plugin". It can be unintuitive for lots of people.
  • The find/replace dialog was too buggy. I took it from Groovy's code. I replaced it today by some SOAPGui code. I adapted it for usability a little bit. It's not perfect, but it does work!
  • I added a keyboard shortcut to switch between opened documents. "Alt W" will switch between windows(select next document).
  • The XPATH textbox has history support. It remembers up to 10 expressions you type in the textbox. The history is cleared when you close the application. Now you can execute an XPATH expression by pressing the "ENTER" key instead of having to click on the "Evaluate button" all the time.
  • When you click on the "insert comment" button or "insert cdata section" button, the editor get the focus back, no need to click again on the document to be able to insert some text.
I'll release tomorrow and the version will be called 1.0.0pre1-alpha. I added "alpha" to let the users know it's not a mature version. Things don't always work as expected. There are more features, but with features come bugs.

I'll keep on fixing bugs, updating the website and the developer guide until tomorrow.

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Under pressure for the new XPontus release

I am getting ready to release XPontus XML Editor next monday : looking here and there, for simple bugs I can fix or forgot to fix, looking at the plugins manager, etc.

Until next monday, I'll be busy to make sure the software is enough usable and stable so I'll be :

  • Creating and testing installers for windows, linux, mac os, bsd, unix
  • Updating the website
  • Coding utility scripts to automate the release announcement in some forums and mailing lists.
  • Fixing bugs time to time
I'll ship all the plugins that I have written and tested enough. So basically, you'll get a big fat and "features-full" version of XPontus. I cannot make a light installer of XPontus as the plugins manager is not enough stable yet. I won't ask all users to open a hidden folder, to copy some zip files and to handle the plugins dependencies logic by themselves.

I'll also have a java webstart version of XPontus but you'll have to install plugins by hand like in the snapshot version. I hope to come with ideas for the plugins manager soon.

I feel happy to release, I've been saying "next week, next month" for too long. I would have wanted to do more for that release but it would have taken few others months to achieve some significant improvements.

Stay tuned!

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Them "viagra boys", Them "here's the money man"

I didn't know that I would get that much spam on my blog or my sourceforge email account... To those doing that, if you're reading this post :

  • I don't need viagra, I'm in a great shape, still young, still full of energy, no issues...
  • I won some money...??? Well, I could use that cash only if it's real. Trying to lure me is kind of playing with yourself. It's 2008 baby... I guess I haven't seen it all but I think I saw most of it... But why not try? Short answer : it's a waste of your time and mine.

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Releasing next week

Next week, I'll start intensive testing of XPontus XML Editor. I will try to release at the end of the week if possible.

Some issues persist but I think that the snapshot version is better than the stable one. If I keep on coding and testing, writing documentation, creating new plugins, I guess I'll never be able publish a new version of XPontus. I've been planning the upcoming release for at least 8 months. I guess now is the time.

I expect plenty of bug reports, constructive comments, nasty critics, but it's all good, it's all fair. It'll help the development of XPontus XML Editor. If you want to contribute, leave me a message at yveszoundi at users dot sf dot net. I try to take my time to write good software, but I could use some help.

I'll try to find a way to get a hand on a Mac OSX pc to build a dmg installer.

There will be 5 installers : Windows(standard exe), Linux(rpm, tgz, deb), MacOSX(dmg), Unix(sh) and a crosss-platform installer.

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Code completion might be in next release of XPontus!

Code completion seems to be working well enough even though there are few bugs. Here is the complete status of the XML code completion plugin.

Code completion creation
I need to find a way to check if the schema(dtd/xml schema) location of the document is relative or absolute. For the moment, the code completion database is only created if the schema location is absolute.

Intelligent completion
I am now able to get an "almost reliable" suggestion list for code completion based on element insertion location. The suggestion list is sorted by name.

The completion window
It is very buggy. I get"nasty stuff" inserted when I try to select a suggested element. Sometimes, text is inserted twice or more. The completion doesn't have a scroller to view elements if their name are too long.

Completion database caching
I don't know how to do it correctly. I could serialize the completion database for now and store it in a folder.

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Bug fixes day

I will get the list of bugs which were mentionned in earlier in previous versions of XPontus XML Editor and fix them one by one.

In the new version of XPontus the following features are not well working yet :

  • XML validation
  • Code completion(should I remove it?)
  • Grammar caching is not reused by plugins
  • Maybe the save actions

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XPontus platform developer guide

I started writing the developer guide of XPontus XML Editor today. I'll update it on a daily basis. The developer guide shows how XPontus XML Editor is written and provides a tutorial on how to build and devploy plugins.

I uploaded the initial version of the developer guide on the website. You can download it at the following address : http://xpontus.sourceforge.net/dev_guide.pdf

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New release at the end of march

The first alpha of XPontus XML Editor 1.0.0 pre1 (End of March)

I've been working hard on XPontus for the last 6 months. It is very different than the previous versions in terms of usability and architecture. Now the software has more features and is more extensible. XPontus has plugins, XPath, an "immature" code completion, etc. Thank you everybody for the bugs reports, the tests and the suggestions. I'll release a new release candidate of 1.0.0 every month until I think that the software is enough stable. The stable version will be called 1.0.0(probably june).

I need to release, so I have to remove incomplete features :

  • The plugins manager(the core of the application) : I was planning to have a complete plugins manager with auto-updates, dependency checking/autoselection, etc. I cannot achieve that goal in a small amount of time. To install a plugin the user must download it for now. I can add a version checking feature to notify the user that a new version is out, but that's it at least for now.
  • Perspectives(Tree Editing, Text editing). Sometimes you want to edit an XML document in a simple window. But when your document is big, you might want to have some drag and drop(elements) features, cut and paste node quickly. I started implement perspectives in xpontus but it involved rewriting lots of code. The big issue with perspectives is how(or how often) you synchronize the text of the source view and other kind of views(Tree view, diagram view for example). I associated persectives to file content types(text/xml, text/xquery, etc.) and file modes(docbook, ant, etc.). When a document needs to be created, the perspective matching the document content type creates the appropriate view to display the document.
So what's the plan?
  • Finish the plugins manager. Find a strategy to uninstall completely a plugin. I cannot do it when the application is running : I can unregister the plugin, but I am not able to delete the plugin installation directory.
  • Ensure that the core features are working well : save, save as , print, validation, etc.
  • Fix previous versions bugs
  • Update code comments and write a developer guide
  • Write the software's architecture manual
  • Update the user's guide
  • Release

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XPontus plugins manager behaviour

I'm removing the components which are not ready yet in the plugins manager. I find it painfull to write a software' dependencies manager. The plugin framework jpf can handle some things from the software perspective(plugins integrity, dependencies not met, etc.). From the user's perspective, I need to add some features like auto-selecting required dependencies of a plugin or if I can't do that popup a dialog telling "This plugin required that other plugin to run".

I was testing the plugins search yesterday and the results are almost good. I have some other issues not tied to the search engine itself : incomplete plugins metadata indexed, etc. Choosing Apache Lucene for plugins full text search was an interesting move. At first sight, I was telling myself "Apache Lucene will be usefull but might be overkill for a simple gui application, ... but for good search results... I need a good search engine instead of using regular expressions to match the results".

I will start writing a developer guide in few days.

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