I've recently started to get into Camunda (version 7). I have already develoiped a few workflows, and everything is running smoothly, including the basic Cockpit, which I find highly useful.
Now I want to put my workflows into production. What are the limitations of doing so, using only the Community edition, instead of the Enterprise one? Am I losing out on something important by not going for the full commercial service?
Will I encounter any limitations down the road that will block my workflows?
You can find a comparison of Camunda 7 CE and EE here:
https://camunda.com/enterprise/
There is no (e.g. volume) limitation on engine level you will be surprised by later on. Apart from commercial support, the additional Cockpit features are very useful and Optimize to add business analytics to your environment may also be of interest.
As anyone familiar with my question is probably aware, Oracle JDK 8 is no longer receiving public updates for free. My dev team deploys applications through GlassFish 4.1.1, which we know and love, but we are nervous about its continued use given that we can't get public JDK updates through Oracle anymore.
I've done a little background research which looks to imply that AdoptOpenJDK may well work with GlassFish, but there is no clear guidance online as far as I can see from either Oracle or Eclipse. There does look to be a couple of posts suggesting users have made it work with Zulu - but the lack of official guidance is frustrating and confusing.
The question I'm specifically asking here is has anyone actually got any real production deployments of GlassFish running with AdoptOpenJDK (or failing that, Zulu)?
I'm hoping we can find a relatively simple swap-out solution for moving from Oracle JDK to AdoptOpenJDK or similar without having to re-install GlassFish.
As a side note, I'm also aware that GlassFish 5.2 is in the pipeline which hopefully should support a JDK from Jakarta EE as and when that arrives - but I really need a solution that I can implement now.
Yes.
GlassFish (and Payara) work fine using OpenJDK or Azul or any other JDK.
Source: Our company is using Azul Java 8 with support.
I am mainly interested in the 'integration features' between the IDE and the application server.
One example would be GUI editors for various server specific deployment descriptors.
Another example, from the NetBeans IDE integration with GlassFish, is the ability to:
edit a java file that is part of a
web application,
save the file and
see the effect of the change that you
just saved in the browser (without a
bunch of reloading).
Please include a link to any reference to the feature in user docs, if you have it at the tips of your fingers.
Over my years using RAD, the feature I'd recommend everybody to use would be its uninstaller...
Seriously though, RAD's advantage used to be IBM's plugins for Web / J2EE development; over the years, though, the Eclipse community has been making great progress with WTP and JST, so for most J2EE development you should do fine using Eclipse+WTP+JST... which are free (comparing RAD with 5-10K USD licensing fees. Per machine, that is).
One person suggested that the 'Web site navigation' tooling was useful.
This is a two part question:
I would like to know where does Oracle ADF 11g stand as a framework to develop / deploy Web / Java EE Applications as compared to other frameworks.
How much is Oracle ADF being used as a framework to Develop Web Applications.
I am asking from a perspective that whether or not there are good job opportunities as an Oracle ADF Developer and what the future looks like for those holding Oracle ADF skills.
Also as Oracle plans to use ADF as core technology for Fusion Applications, Is it good time to build Oracle ADF skills as a siebel developer? As the future Oracle CRM Applications like ERP, SCM will be based on ADF should developers start building ADF skills. Around when will customers start implementing those applications based on ADF. Will these be available On Premise or mostly On Demand in SaaS way.
We have chosen Oracle ADF in our company for one of our projects. Sadly, this proved to be a big mistake. I personally have used Oracle products, in particular their DB, but as far as fusion middleware is concerned, I would advise you to stay away from it. ADF was by far the worst framework I have ever used as an architect. Some of its features I noticed are: very complex, Oracle just "invents" or forces some development approaches that have been proven as a bad practice by the Java community years ago. ADF is very slow compared to other frameworks. With being slow I mean ADF pages run slow. The reason for this is extremely complex generated html and javascript. You can check this by opening up Firebug and inspecting the generated html...it looks like something from the 90s...Terrible. Not to be overly pedantic, but ADF pages have huge amounts of validation errors causing problems in making them run on all browsers. The architecture of ADF is, in my view, messy. Struts2 for example is a much cleaner framework which makes it very easy to integrate it with 3rd party libraries such jQuery, etc. Oracle advocates ADF as an MVC framework but frankly I failed to see the actual MVC architecture there.
ADF uses its own javascript libraries, which are huge, practically impossible to modify, unoptimized and slow in comparison to others such as jQuery or Prototype. The emerging trends in J2EE are lightweight pluggable frameworks that are easily integrated with other tools such a Spring for managing dependencies, jQuery for scripting, CC for continuous integration. ADF is a heavy-weight tightly-integrated framework with other ORacle tools, which makes it very difficult to use it any other way than Oracle devised.
Not to mention the development tools that you are forced to used when developing ADF - the JDeveloper which is very buggy and crashes regularly. Developing in Eclipse is problematic, because ADF has numerous "specific" files which JDeveloper generates automatically.
All in all...ADF was a huge disappointment for us. We spent months messing with it, when finally our client decided the application was too slow and difficult for them to support it and the cancelled it altogether.
Based on my experience i can only say stay away from it. Choose one of the more supported and architecturally clean solutions such as Struts2 or Spring.
I have used JDeveloper 10 and 11, both with ADF, on two enterprise ADF projects for a prominent defense contractor. I agree that ADF is complex, but disagree that JDev crashes frequently, or that the pages are slow to render.
Now... why ADF? Read Oracle's synopsis below, stating that JDeveloper and ADF make Java EE development more accessible to "business" programmers. While this does not guarantee elegant programs, it does almost certainly guarantee that, when these developers get into trouble with ADF, they will probably be utterly lost and will have little idea how to open the hood and reach inside. Conversely, they would be lost even sooner trying to integrate the current J2EE open-source cornucopia.
THE SERMON
Source: ADF Developer's guide (paraphrased)
"Since the early Java days in the late 1990's , the Jave enterprise platform has grown massively and today is used by a large community of developers. However, the developer community is not homogenous and includes developers who are not expert Java programmers, but are business developers who have core competencies in their industries. As the Java EE platform and community grows, the average programmer skill level is declining.
It's hard to imagine that there is a single developer who understands all aspects of the Java EE platform in depth. The problem to address in Java EE is to provide a technology that empowers developers to build cutting edge web and SOA app's without limiting their agility.
Existing Java frameworks such as Struts, Spring, JSF, EJB, GWT, etc are blankets pulled over areas of complexity that expose simpler controls to work with. Using frameworks, developers no longer work with the java core API's but instead interact with interfaces and services exposed by the framework.
Blah, blah, blah...
What seems a small problem for experienced java developers is another hurdle for business developers who are new to java and EE development. This type of developer may turn to a a single dev environment promising integration of all aspects of app development in a single technology chouice. Developers from a 4GL desktop dev background might be attracted by PLSQL, .NET, Adobe Flash.
An experienced Java developer might see this a a big mistake, but how would those developers know, unless Java too provides a single solution for them? The solution is an end-to-end framework which pulls another blanket over the technologies, one that combines different framewokrs and technologies into a single product that exposes visual and declarative development gestures as it's predominant programming methodology... ADF."
I have been working with ADF since last 6 months, and i realise that ADF is made particularly large application with strong database integration. I haven't seen any other Framework which can provide you with so fast and easy development of database rich applications.
Yes i agree that it have some bugs, but still it works well if you know how to work with it.
My perception of and experience with ADF is that it is a very solid and robust framework (unfortunately, the development tools are not.) I'm not sure there's much competition to it, at least, not from a single framework. ADF itself is really several different frameworks combined over the years into a mostly cohesive product. Now that Oracle owns Java, i really expect (hope) parts/much of ADF finds its way into Java EE-proper so we can maybe see alternative implementations and better development tools. If that were to happen, it'd pretty well solidify ADF's future (as long as Oracle doesn't screw the Java community in the meantime and push them to alternative VM platforms).
If you are already familiar with or want to work with Oracle(-related) products, ADF is what you want. Given the market penetration of Oracle, it's probably a reasonable bet that they'll remain dominant and your skills will remain marketable for years to come. Oracle is spending lots of money and acquiring lots of companies to try to own and retain the enterprise.
The SaaS question, to me, is a little harder to answer. While it does seem to be moving in that direction, it's not clear to me if it's mostly marketing's attempt to give it that push or if business-need is driving it. And there are lots of questions i don't really track such as business trust of the cloud for critical data and reliability.
Short answer:
You developing Enterpise solution, your product vendor is Oracle - ADF is a best choice
You indie developer, your solution is not for enterprise, you not going to use other products in the Oracle stack - ADF is not for you, look for another framework.
Long answer:
If you going to Enterprise, if your general product's stack vendor is Oracle. Your best choise is to go along with ADF. ADF becomes better with each major release. I've started using ADF since 11.1.1.2, had a look at 10.x and now using 12.1.3, while still supporting large enterprise applications on 11.1.1.6.
I see a huge improvement and its really hard to find another product that provide better integration and support for whole Oracle stack.
However, if you quite familiar with other framework or/and not going to use other Oracle products and/or your customers can't afford to pay quite a lot for ADF/Weblogic/DB/ECM etc.. - your best choise is to avoid ADF. Its good for large enterprise solutions.
Yes, in fact actually you can develop using free and limited version of ADF - Essentials, use other app server as tomcat or glassfish, but you'll be better off with the other framework. ADF Essentials is only kickstart to large enterprise world, not a solution for small lightweight application.
Development in ADF is a pain in the heart. For a newcomer, the learning curve is too steep. I wish it could be more like learning dot NET.
From my perspective, learning and constructing a functionality in dot NET takes a quarter of the time to do the same in ADF. Of course, it imbalance reduces as a person learns along, but that's pretty much the scenario for beginners. It's frustrating.
I have been working with ADF since last 3 months, and i can tell you that ADF is a really suitable for situations which is essential to provide fast development process for large enterprise applications with strong database integration.
Compairing to other JavaEE framworks like Spring,
It is extremely complex when fixing bugs becasue of the architechtur of the ADF and lack of dev community relative to Spring. Spring has large development community
around the framework.
It is hard to impliment MVC architecture with the ADF inter component integrations.
Spring Developers have much more reputation and demand compared to ADF developers.
ADF is very slow, heavy-weight, tightly-coupled compared to Spring and integrated framework with Oracle tools.
Hope this will help you to solve your problem and gain your knowledge. Happy coding!!!
What is the significance of new cloud platforms and databases like Microsoft Azure and Amazon EC2?
Is it a replacement for enterprise application platforms like .net or Java EE in a cloud environment?
Is it neccessary to use these or other cloud specific platforms, or can we implement .net or Java EE on a cloud based environment?
I think the comparison is not correct to some extent. Cloud is a deployment issue and J2EE Technologies is a development issue.
The idea of clouds was to take away the hardware costs for existing application which have been build on J2EE or .NET or any other application development framework.
Yes when you deploy your applications in clud, there are some changes and some deployment strategies which would enforce some change in your application but application would still be J2EE or .NET as was the case before
I see two kinds of clouds, those that offer their own programming model and those that host applications developed in an existing programming model. Give the choice I would prefer the latter, I don't want to redevelop my existing apps and I want to sure that I'm free to host my app on my choice of host.
As it happens I'm a Java EE developer and there are Java EE clouds, so I'm OK. So for me Azure has little immediate significance other that to reinforce the message that serious vendors see a future for cloud computing.
Now, what is Azure? Is it a hoster of .NET apps, or is it offering a different programmng model? Or Both? I'm finding it hard to determine from the various web sites and reviews. There's talk of .NET programming an C# and VB and maybe other languages and using existing tooling, so my current guess is that .NET developers will be at home, but perhaps need to adapt their style.
My tentative opinion: if I'm a doing .NET I'll keep doing it and expect to find a suitable cloud one day. If Azure is that cloud (and I'd want to find out) well and good, if not then I'll wait for something better.
In a serious enterprise space I don't need to back a winner in a market place that's still evolving. I probably will have sensitive apps that I'm not going to put in a public cloud anyway, so sticking to Java EE suits me fine, I've got private cloud capabilities if I need them.
EC2 is kind of a hybrid; at its root it's a hosted virtual machine service that lets you choose the operating system you want (most Linux distributions, Solaris or a couple of versions of Windows Server) and then configure them as you like without restrictions.
On top of that, Amazon has built services such as Simple DB, Simple Queue Service and Simple Notification Service that make it into more of a development platform, but it's important to note that these run cross-platform and can be programmed to in multiple languages.
A link to Windows Azure's Tomcat Solution Accelerator can be found on MSDN's "Windows Azure Platform" landing page where you will also find links to the following:
Windows Azure SDK for Java
Windows Azure SDK for PHP
Windows Azure Tools for Eclipse
AppFabric SDK for Java™ Developers
AppFabric SDK for Ruby Developers
AppFabric SDK for PHP Developers
As well as...
MySQL PHP Solution Accelerator
MediaWiki MySQL Solution Accelerator