[opencms-dev] Beginner completely lost
a.westermann at alkacon.com
a.westermann at alkacon.com
Tue Sep 1 15:43:55 CEST 2009
Hi Shi,
your perspective reminds me on the following
(http://httpd.apache.org/docs/1.3/mod/mod_rewrite.html):
"The great thing about mod_rewrite is it gives you all the
configurability and flexibility of Sendmail. The downside to mod_rewrite
is that it gives you all the configurability and flexibility of Sendmail."
I never had an OpenCms project where I had to say: "No this is not
possible". In my beginnings with OpenCms I sure had to say: "I have to
take a closer look".
Kind Regards,
Achim.
-------------------
Achim Westermann
Alkacon Software GmbH - The OpenCms Experts
http://www.alkacon.com - http://www.opencms.org
Shi Yusen wrote:
> I remembered there was a PPT on OpenCms's struture which made OpenCms
> quite easy to understand. The main concept is something like this:
>
> 1. an HTTP request to servlet container such as Tomcat;
> 2. The servlet container forwards the request to OpenCms;
> 3. In OpenCms servlet, enter org.opencms.main.OpenCms first;
> 4. org.opencms.main.OpenCms produces an CmsObject instance;
> 5. The CmsObject instance contains the resource to visit and security
> who visits;
> 6. If the user has permissions to visit, using the loader of the
> resource to load it to the response; if not, error in response.
> 7. You can extend resource, loader, user, group, permission.
>
> Is it simple? Yes, if you know where to do the thing you want to.
>
> Is it simple? No, if you lost in OpenCms structure.
>
> My 2 cents,
>
> Shi Yusen/Beijing Langhua Ltd.
>
>
> 在 2009-09-01二的 12:51 +0200，Pablo写道：
>> Hi Gregor. I've been working with OpenCms for 6 months. I had to
>> either develop an application with OpenCms or find another job. Some
>> people love it. I still wonder why. If I had a choice I would run away
>> from OpenCms and spend my time learning something else. You will need
>> plenty of time to get familiar with OpenCms implementation and
>> configuration.
>> I am sorry if that is not what you or others like to hear. It is just
>> another point of view.
>>
>>
>> 2009/8/30 Paul-Inge Flakstad <flakstad at npolar.no>
>> Hello Gregor!
>>
>> I was first introduced to OpenCms around 18 months ago. I came
>> straight out of scool (where focus had been on OOP) and
>> thinking back to that time, I had a lot of the same questions
>> you do (although I knew I _had_ to learn OpenCms as it was
>> already decided). What I did, was I didn't use OpenCms'
>> template one/two. I set out to create stuff myself, in an
>> effort to learn the system. Maybe not the best idea, but it
>> certainly gave me some insight, relatively fast. Before long,
>> I also read the book (OpenCms 7 Development), which helped me
>> a lot. It may be the single most useful resource if you want
>> to learn OpenCms, IMO.
>>
>> Now, I know there's not any good beginner guides out there.
>> Such things are mostly scattered around the mailing list,
>> forums and whatnot. But it isn't all that hard to build stuff
>> from scratch. You'll just have to familiarize yourself a bit
>> with OpenCms and its mechanics; templates, resource types,
>> properties, collectors - and last but not least, modules. The
>> hardest part for me was understanding the way templates work,
>> since I wasn't too familiar with the concept of templates.
>>
>> I'd recommend you spend some days just setting up a test-site
>> so you can fiddle around with these things. Being familiar
>> with Java will help you, as you will be able to examine the
>> docs. There are a lot of classes in OpenCms. Starting out,
>> here are a handfull of the important ones (add the opencms.jar
>> library in your IDE project):
>> CmsJspActionElement / CmsJspXmlContentBean
>> CmsObject
>> CmsResource / CmsFile
>>
>> and also:
>> OpenCms (in org.opencms.main)
>> CmsProperty
>> (CmsJspNavElement)
>>
>> Also, you should read anything about "creating structured
>> content", "defining custom xmlcontent" and so on. Structured
>> content (also called xmlcontent, which is the "general type
>> name" OpenCms uses for all types of structured content) is a
>> simple way for you to define your own (structured) resource
>> types. You do the definition using one or more XSDs, and this
>> is explained several places online and also in the book. This
>> is perhaps a more advanced topic, often involving the creation
>> of a new module, but I would not wait with this. It is
>> essential if you're thinking of building stuff from scratch
>> rather than using OpenCms' template one/two.
>>
>> I hope you do not ditch OpenCms. It is really a great tool,
>> and my bet is you'll enjoy it once you get to know it. Ask
>> your specific questions here on the mailing list, and I'm sure
>> we'll try to help you along. :)
>>
>> Cheers,
>> Paul
>> ________________________________________
>> Fra: opencms-dev-bounces at opencms.org
>> [opencms-dev-bounces at opencms.org] på vegne av Florian
>> Heinisch [florian.heinisch at 3kraft.com]
>> Sendt: 28. august 2009 18:13
>> Til: The OpenCms mailing list
>> Emne: Re: [opencms-dev] Beginner completely lost
>>
>>
>> Hi Gregor,
>>
>> apparently you feel the same way I did when I started with
>> OpenCMS.
>> Except of you already have read the OpenCMS book ;-)
>> Well, IMHO OpenCMS has a really steep learning curve. As the
>> standard
>> installation of OpenCMS provides a lot of features it might
>> not that
>> easy to grasp every little detail of OpenCMS at the very
>> beginning.
>> I fully agree with you the documentation that comes along with
>> OpenCMS
>> is not very beginner-friendly. And as far as I know there is
>> no
>> complete "how-to-build-a-website-from-scratch" tutorial.
>> You'll have
>> to grab all the necessary information from different sources.
>>
>> Nevertheless, if you are firm with Java and the concept of a
>> J2EE web
>> application you should be able to get your website up and
>> running with
>> OpenCMS.
>> Therefore, I would suggest you'll do the following:
>> 1. Install OpenCMS with all the template2 modules
>> 2. Follow the instructions in the OpenCMS book to setup your
>> development environment (Eclipse) with WebDAV for efficient
>> development
>> 3. Develop a template from scratch as described in the OpenCMS
>> book in
>> order to convert your website layout into a OpenCMS template
>> 4. Have a look at the existing content types (such as Article,
>> News,
>> etc.) that come along with the standard OpenCMS installation
>> (template2). For the case that these content types do not fit
>> your
>> needs, develop your own (also described in the book and in the
>> OpenCMS
>> wiki).
>>
>> That's it basically. Feel free to share your problems with the
>> mailing
>> list for the case that topic was not discussed yet :)
>> If you'll drop OpenCMS in favor of another open source
>> Java-based CMS
>> please let me know which one and for what reason (personal
>> interest).
>>
>> Good luck,
>>
>> Florian
>>
>>
>>
>> On Aug 28, 2009, at 5:39 PM, Gregor Schneider wrote:
>>
>> > -----BEGIN PGP SIGNED MESSAGE-----
>> > Hash: SHA1
>> >
>> > Hi there,
>> >
>> > I'm looking for an CMS in Java since due to our
>> security-policy PHP is
>> > not an option, and we don't know our ways aorund in Perl.
>> >
>> > Therefore, OpenCMS is (was?) one of our candidates, and has
>> been my
>> > personal favourite until I started testing.
>> >
>> > Giving you some background-information:
>> >
>> > Installation 1:
>> >
>> > - - OS: Debian Edge
>> > - - DB. MySQL 5
>> > - - Java: SUN JDK 1.6
>> > - - Webserver: Tomcat 6
>> >
>> > Installation 2:
>> >
>> > - - OS: Windows XP
>> > - - DB: MySQL 5
>> > - - Java: SUN JDK 1.6
>> > - - Webserver: Tomcat 6
>> >
>> > On both installations I'm using OpenCMS 7.5
>> >
>> > Myself:
>> >
>> > I know my ways around in Java, JSPs, Servlets,
>> Tomcat-Administration,
>> > so there should hopefully not be any lack of knowledge of
>> essential
>> > components
>> >
>> > However:
>> >
>> > After having set up OpenCMS, all the questions began:
>> >
>> > - - Where's the documentation?
>> > - - Where's any sort of a good tutorial?
>> > - - How do i...?
>> >
>> > I have to setup a complete new webpage, so just editing the
>> > demo-applications doesn't help at all.
>> >
>> > What I'm really, really missing is a step-by-step-howto
>> showing the
>> > following:
>> >
>> > All tutorials / books I read just start somewhere in between
>> showing
>> > how to hack into existing pages, but not how to set up a new
>> site from
>> > scratch.
>> > And yes, I looked into the Wiki, however, the points of
>> interest don't
>> > contain anything but a headline.
>> >
>> > Currently I feel that OpenCMS is one of those really bad
>> examples of
>> > an OpenSource-project, where the code is the docs. Ok, I'm
>> exagerating
>> > a bit.
>> >
>> > So if anybody could give me a piece of advice how to set up
>> a new page
>> > incl. new templates, how to start, what's the best practices
>> etc., I'd
>> > really, really appreciate this.
>> >
>> > My other option is to dump OpenCMS as a cms for our company,
>> which I
>> > really dislike, however, currently that seems to be the most
>> likely
>> > option.
>> >
>> > And yes, Ive read
>> >
>> > - - http://opencmsnewbie.netfirms.com/
>> > - - http://www.opencms-wiki.org
>> >
>> > The book from Packt Publishing: OpenCms.7.Development
>> (Apr.2008)
>> >
>> > Again, any hints are really, really appreciated.
>> >
>> > Cheers
>> >
>> > Gregor
>> > - --
>> > just because your paranoid, doesn't mean they're not after
>> you...
>> > gpgp-fp: 79A84FA526807026795E4209D3B3FE028B3170B2
>> > gpgp-key available
>> > @ http://pgpkeys.pca.dfn.de:11371
>> > @ http://pgp.mit.edu:11371/
>> > skype:rc46fi
>> >
>> > -----BEGIN PGP SIGNATURE-----
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>> > Comment: Use GnuPG with Firefox : http://getfiregpg.org
>> (Version:
>> > 0.7.8)
>> >
>> > iD8DBQFKl/nr07P+AosxcLIRAthcAKCGEKdZyfUMv5vLb7vRryWOeC
>> +WBwCbBePo
>> > hHHNNHTgcPbgqcSvgOVNBMA=
>> > =dMGb
>> > -----END PGP SIGNATURE-----
>> >
>> > _______________________________________________
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>>
>>
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