This tutorial is designed for beginners with little or no OFBiz experience. It covers the fundamentals of the OFBiz application development process. The goal is to make a developer conversant with best practices, coding conventions, basic control flow, and all other aspects which a developer needs for OFBiz customization.
This tutorial will help you in building your first "Demo Application" in OFBiz.
This tutorial is intended to be used with the branch 15.12 of Apache OFBiz.
For any questions or concerns, please use OFBiz User Mailing List. Details about the mailing lists are available here.
Overview (Introduction to OFBiz)
Open For Business (OFBiz) is a suite of enterprise applications built on a common architecture using common data, logic and process components. The loosely coupled nature of the applications makes these components easy to understand, extend and customize.
The tools and architecture of OFBiz make it easy to efficiently develop and maintain enterprise applications. This makes it possible for us as the creators and maintainers of the project to quickly release new functionality and maintain existing functionality without extensive effort. It also makes it easy to customize and extend existing functionality when you have a specific need.
The architecture alone makes it easier for you to customize the applications to your needs, but many of the best flexibility points in the system would be meaningless and even impossible if the system was not distributed as open source software. OFBiz is licensed under the Apache License Version 2.0 which grants you the right to customize, extend, modify, repackage, resell, and many other potential uses of the system.
No restrictions are placed on these activities because we feel that they are necessary for effective use of this type of software. Unlike other open source licenses, such as the GPL, your changes do not have to be released as open source. There are obvious benefits to contributing certain improvements, fixes, and additions back to the core project, but some changes will involve proprietary or confidential information that must not be released to the public. For this reason, OFBiz uses the Apache License Version 2.0 which does not require this. For more information on open source licenses see the Open Source Initiative (OSI) website at www.opensource.org.
Another benefit of this open source model is that we receive constant feedback from those who are using the software. We have received countless bug fixes, improvement suggestions, and best-practice business advice from users and potential users of OFBiz. Many of the greatest features in the project were inspired by some comment or suggestion sent to the mailing lists associated with the project. With dozens of organizations using the software and probably hundreds of deployed sites using one piece or another of the project we generally get 20-30 emails each day about the project.
To make sure our functionality is timely and useful we always start by researching public standards and common usage for any component we are working on. This helps us support and use common vocabularies and gives us an instant breadth of options and features that can only be achieved through standards processes and other group efforts. It also opens doors in the future for flexible communication with other systems that are built around the same standards, both inside your organization and in partner or other organizations.
The applications and application components that come with the system provide you with a broad and flexible basis that can be used as-is with the best-practices based designs or customized to your own special needs. The applications facilitate management of everything from parties and products to accounting, customer service, and internal resource and asset management.
Setting up and Running OFBiz
Download Apache OFBiz Framework
If you haven't already checkout Apache OFBiz Framework on your machine, let's do it. Anyone can checkout or browse the source code in the OFBiz public Subversion (SVN) repository. If you don't have Subversion, to install it you can go here for instructions.
To checkout the source code, simply use the following command (if you are using a GUI client, configure it appropriately):
- For release : $ svn co http://svn.apache.org/repos/asf/ofbiz/branches/release15.12 ofbiz.15.12
Running Apache OFBiz
- Using the command line, build and start OFBiz (with demo data), use command:
Above command will load demo data(Sample Data to run apps) comes with OFBiz in Derby Database, it comes configured with OFBiz.
- Direct your browser to http://localhost:8080/webtools and login with username "admin" and password "ofbiz" and look around a bit.
That's it, Apache OFBiz is now running on your system!!
Create Your First Application (Hello World...)
Introduction to Components
An OFBiz component is a folder, containing a special xml file, named “ofbiz-component.xml”, that describes the resources to be loaded and required by the component.
OFBiz itself is a set of components.
- framework components:These are lower level components that provides the technical layer and tools to the application components; the features provided by these components are typically the ones provided by any other development framework (data layer, business logic layer, transaction handling, data source pools, etc…)
- application components:These are generic business components required for ERP applications that can be extended/customized (product, order, party, manufacturing, accounting etc…); application components have access to the services and tools provided by the framework components and to the services published by other application component.
- special purpose components:These components are similar as applications components but meant for special purpose applications like ecommerce , google base integration , eBay integration etc.
- hot-deploy components:This is an empty component available for custom development. Custom components can extend/override, the resources published by all the other components.
Create the component
It's very easy to setup a new custom component in OFBiz in hot-deploy directory. Using command line you just need run the following command and answer questions which are being asked for naming your custom component, component resource, webapp and base permission as shown below:
Running your first application
Before running our first component, let's say 'Hello to the World'
Simply open $OFBIZ_HOME/hot-deploy/ofbizdemo/widget/OfbizDemoScreens.xml file from ofbizdemo component (you just created)
We have only added the <label text="Hello World!! :)" />
- Now you will need to restart OFBiz by reloading data($ ./ant load-demo start). It's required as you have created a new component with some security data for you component (Setup by default in your component data directory as OfbizDemoSecurityGroupDemoData.xml) and as you will restart it, ofbizdemo component will also be loaded.
- As OFBiz restarted direct your browser to your application here http://localhost:8080/ofbizdemo
- You will be asked to login. Login with user: admin password: ofbiz.
- As you login you will see ofbizdemo application up with the hello world message you have put in screen as shown in below given image.
That's it, congratulations your first component is setup and running.
Creating First Database Entity (Table)
To create custom Entities/Tables in database, you simply need to provide entity definition in $OFBIZ_HOME/hot-deploy/ofbizdemo/entitydef/entitymodel.xml file of your ofbizdemo application. This file structure is already setup when you used ant target to setup your component. You simply need to go in and provide entity definition as shown below. Here we are going to add two new entities for ofbizdemo application.
Now have a look at $OFBIZ_HOME/hot-deploy/ofbizdemo/ofbiz-component.xml file. You already have resource entry made in it for loading these entities from their definitions to database when component loads. As shown below:
To check simply re-start OFBiz (Ctrl+C followed by "./ant start") and direct your browser to Entity Data Maintenance Tool here: https://localhost:8443/webtools/control/entitymaint and search for entities OfbizDemoType and OfbizDemo. You will see it as shown in below given image.
Preparing data for entity
As you have setup your custom entities, now is the time to prepare some sample data for it. You can do it in data XML files already setup under data directory of your component as $OFBIZ_HOME/hot-deploy/ofbizdemo/data/OfbizDemoTypeData.xml and $OFBIZ_HOME/hot-deploy/ofbizdemo/data/OfbizDemoDemoData.xml. Set it up as shown below:
Now again have a look at $OFBIZ_HOME/hot-deploy/ofbizdemo/ofbiz-component.xml file. You already have resource entry made in it for loading data prepared in these files as:
Loading data in entity
At this moment to load this sample data into entities/tables defined you can either run "ant load-demo" on console or can directly go here in webtools to load entity xml https://localhost:8443/webtools/control/EntityImport.
Simply put your xml data in " Complete XML document (root tag: entity-engine-xml):" text area and hit "Import Text", as shown in below given image
As you will hit Import Text, it will load data and will show the result as shown below
After completing the data load process again visit Entity Data Maintenance(https://localhost:8443/webtools/control/entitymaint) and check your entities, you will find this data here that you just loaded.
That's it, you have successfully imported the data in the database tables, super easy, right!
Form and Services
In our previous section, we have seen how to create the entities (tables), now it's time to create a form which will allow you to make entries in that entity.
Create a Service
Before preparing form, let's write a service to create records in database for OfbizDemo entity in service definition xml file ($OFBIZ_HOME/hot-deploy/ofbizdemo/servicedef/services.xml)
Now again have a look at $OFBIZ_HOME/hot-deploy/ofbizdemo/ofbiz-component.xml file. You already have resource entry made in it for loading services defined in this file as:
For this service definition to load you will need to restart OFBiz. To test this service you directly go to webtools --> Run Service option here: https://localhost:8443/webtools/control/runService
Running service via Web Tools: This a smart utility provided by framework to run your service.
On submission of the form above, you will presented a form to enter IN parameters of the service.
Create the add Form
Let's create our first form for this service and for that let's edit the existing file at location $OFBIZ_HOME/hot-deploy/ofbizdemo/widget/OfbizDemoForms.xml and add Create Form for OfbizDemo as shown below:
Here you can notice we have used auto-fields-service to auto generate the form based on service definition IN/OUT attributes.
Go to Screens xml file(OfbizDemoScreens.xml) add this form location in decorator body to your screen that you used to show the Hello World... text. As shown below
Controller Entry for Form
Before you go to the form and start creating OfbizDemo records from add form, you will need to make an entry in $OFBIZ_HOME/hot-deploy/ofbizdemo/webapp/ofbizdemo/WEB-INF/controller.xml file for the target service which will called when form is submitted. You can do it as shown below under Request Mappings in your ofbizdemo apps controller file:
Everything set, let's have a look into to our recently create form http://localhost:8080/ofbizdemo
Primary key(ofbizDemoId) is not needed to be send in with the form, it will be auto sequenced by OFBiz in db records.
Create a Find Form
Let's create a find form for the entity OfbizDemo, so that you search OfbizDemos being created.
1.) Add the forms (FindOfbizDemo and ListOfbizDemo) in OfbizDemoForms.xml
Form or Screen's action tag is used for data preparation logics for your view.
We have used OOTB OFBiz generic service performFind to do the search operations which is easy and efficient to use when you have to perform search on one entity or one view entity.
2.) In next step, we will include these form in the screen, let's add these form in OfbizDemoScreens.xml file. For this include the FindOfbizDemo screen defined below in the OfbizDemoScreens.xml
3.) Add request mapping for accessing this new Find Ofbiz Demo page in controller.xml
4.) Now, let's add a new menu for showing find option.
Creating a menu is really simple in OFBiz, all the menus are defined is *menus.xml.
When we create a component from ant target, we get a file named OfbizDemoMenus.xml
Make the following entry in the OfbizDemoMenus.xml file.
Use of UI Labels
Internationalization of Apache OFBiz is really easy, we define the UI Labels in various languages and on the basis of user's locale, respective label is shown.
Here is the example of UI Labels (while creating component <component-name>UiLabels.xml is created by default, in our case it is OfbizDemoUiLabels.xml)
Now simply restart the server, under ofbizdemo application (https://localhost:8443/ofbizdemo/control/main) you will see the Find menu option.
Services using other engines
Whenever you have to build a business logic you should prefer to write services to leverage features from its built in Service Engine.
The service "createOfbizDemo" that you created earlier was using engine="entity-auto" and hence you didn't need to provide its implementation and OFBiz took care of create operation. When you need to work on complex operations in service involving multiple entities from database and custom logics to be built, you need to provide custom implementation to your service. In this section we will focus on this.
Service in Java
You can implement a service in Java as directed here in below given steps:
1.) Define your service, here again we will be operating on the same entity(OfbizDemo) of our custom Ofbiz Demo application. Open your service definition file $OFBIZ_HOME/hot-deploy/ofbizdemo/servicedef/services.xml and add a new definition as:
Notice we have this time used engine="java".
2.) Create package in your ofbizdemo components src directory e.g. src --> com --> companyname --> ofbizdemo --> services. Services which has to be implemented in Java can be placed in this directory for your application.
3.) Define new Java Class in file OfbizDemoServices.java here in services directory and implement method, which is going to be invoked by your service definition, as shown below:
4.) Stop server and re-start using "./ant clean build start", it will compile your class and will make it available when ofbiz restarts which updated jar file.
5.) Test service implemented using webtools --> Run Service option(https://localhost:8443/webtools/control/runService) or simply update the service name being called by your controller request to use this service instead and use add form in your app that you prepared earlier. By doing this your Add OfbizDemo form will call this java service.
To make sure this new service implementation is being executed, you can check this line in console log that you have put in your code using Debug.log(....). For logging in OFBiz you must always use Debug class methods in Java classes.
Service in Groovy
To utilize feature of on the fly compilation and less line of code you can implement services for building business logics in OFBiz using Groovy DSL.
To implement a service using Groovy you can follow below given steps:
1.) Add new service definition to services/services.xml file as:
2.) Add new groovy services file here component://ofbizdemo/script/com/companyname/ofbizdemo/OfbizDemoServices.groovy
3.) Add service implementation to the file OfbizDemoServices.groovy
4.) Stop server and re-start using ./ant start, this time we just need to load the new service definition, no explicit compilation is required as its a service implementation in Groovy.
5.) Test service implemented using webtools --> Run Service option(https://localhost:8443/webtools/control/runService) or simply update the service name being called by your controller request to use this service instead and use add form in your app that you prepared earlier for testing. By doing this your Add OfbizDemo form will call this groovy service.
To make sure this new service implementation is being executed, you can check this line in console log that you have put in your code using Debug.log(....). For logging in OFBiz you must always use Debug class methods in Java classes.
To get more details around using Groovy DSL for service and events implementation in Apache OFBiz you can refer document created by Jacopo Cappellato in OFBiz Wiki here.
Events in Apache OFBiz are simply methods used to work with HttpServletRequest and HttpServletResponse objects. You don't need to provide definitions of these as you did with services. These are directly called from controller. Events are also useful when you want to add custom server side validations to input parameters. For performing db operations you still call prebuilt services from events.
To write an event in OFBiz follow these steps:
1.) Add a new events directory to package and a new Events class file as mentioned here:
2.) Add controller request of calling this event as:
3.) Stop and start server by rebuilding it as we need to compile Java event class that we have added in #1.
4.) Now to test the event you can simply change the AddOfbizDemo form target to read "createOfbizDemoEvent" and as its submitted now it will call your event.
Difference between service and event
Here are some difference between services and events,
- Events are used for validations and conversions using map processor, while services are used for business logics like CRUD operations.
- Service returns Map.
- Event returns String.
- Services are loaded with the server, any changes in definition (not implementation if in MiniLang) needs a reload.
- We can call service inside event. But we cannot call event inside service.
- An event is specific local piece functionality normally used in one place for one purpose and called from its location.
- A service is a piece of functionality which can be located anywhere on the network, is most of time used in several different places and is called by its 'name'.
- In case of events you have access to HttpServletRequest and HttpServletResponse objects and you can read/write whatever you want. In case of services, you have access only to service parameters.
References: https://cwiki.apache.org/confluence/display/OFBIZ/FAQ+-+Tips+-+Tricks+-+Cookbook+-+HowTo#FAQ-Tips-Tricks-Cookbook-HowTo-DifferenceBetweenEventAndService and http://ofbiz.135035.n4.nabble.com
|Implementation possibilities||Entity auto, Java, Simple (XML) & Groovy||Simple (XML), Java & Groovy|
|Used to write business logic||Yes||No|
|Job Scheduling possible||Yes||No|
Customizing User Interface
Using FreeMarker Template and Groovy Script
Okay so we are here in the last part of OFBiz tutorial. In this part we will focus on customizing UI layer of Apache OFBiz for business management apps i.e. backend apps. The important thing here is to develop applications as user want it.
So to customize UI part of your application first of all to make it easy we will be using Freemarker Templates instead of inbuilt form widgets. First of all we will see how to use Freemarker and Groovy scripts with Apache OFBiz and then we'll see how to put on custom styling on it by defining your own decorators. Initially we will be using OFBiz default decorators.
Starting from here follow steps given:
1.) Add two Freemarker files at location $ OFBIZ_HOME/hot-deploy/ofbizdemo/webapp/ofbizdemo/crud/AddOfbizDemo.ftl and ListOfbizDemo.ftl, as shown below:
2.) Add new Groovy file for data fetching logic at location $ OFBIZ_HOME/hot-deploy/ofbizdemo/webapp/ofbizdemo/WEB-INF/actions/crud/ListOfbizDemo.groovy and add code as shown to list out OfbizDemo records:
3.) Add new screen file with Ofbiz default decorator to OfbizDemoScreens.xml with newly added freemarker and groovy files as:
4.) Add new controller request and a new item for OfbizDemo menu as:
5.) Add new UI Labels as used by your app.
6.) Run your ofbiz demo application and go to the new tab you just added. You should have view as:
Creating Custom Decorator
Having your UI in Freemarker gives you freedom to experiment it, doing CSS tweaks and make your application the way user wants. In this section we will see how we can do that.
We will be doing it by defining custom decorator for your application view. A decorator in OFBiz is nothing but a screen that you define and reuse it afterwards by including it in your other screens of application. You are already doing it with default decorator(main-decorator –> ApplicationDecorator) which came with OFBiz. Just observe your screens you have prepared so far, you will find that, you were using this main decorator, please refer below line in OfbizDemoScreens.xml.
The mainDecoratorLocation is available in parameters map as it is defined in webapp's web.xml
Now is the time to define your own decorator with custom styling.
In the sample given below we are going to use Bootstrap to style our sample Freemarker screen we developed in last part of this tutorial. Follow below given steps to build your own decorator.
1.) Download Bootstrap v3.3.7 directory, you can download it from here and unzip it.
2.) Create two new directories namely "css" and "js" at location $ OFBIZ_HOME/hot-deploy/ofbizdemo/webapp/ofbizdemo/
3.) Copy bootstrap-3.3.7/dist/css/bootstrap.min.css to $ OFBIZ_HOME/hot-deploy/ofbizdemo/webapp/ofbizdemo/css
4.) Copy bootstrap-3.3.7/dist/js/bootstrap.min.js to $ OFBIZ_HOME/hot-deploy/ofbizdemo/webapp/ofbizdemo/js.
5.) Open $ OFBIZ_HOME/hot-deploy/ofbizdemo/webapp/ofbizdemo/WEB-INF/web.xml and make entries for css and js directories in allowedPaths at the end as shown below:
6.) Add new directory named "includes" at location $ OFBIZ_HOME/hot-deploy/ofbizdemo/webapp/ofbizdemo/ and create two new files in this new directory you just added named PreBody.ftl and PostBody.ftl. We will be using(including) these two files in our decorator screen to build complete HTML page.
7.) Open Common Screens file of your component $ OFBIZ_HOME/hot-deploy/ofbizdemo/widget/CommonScreens.xml, this is the file we will define our custom decorator.
8.) Update screen named "OfbizDemoCommonDecorator"(which will serve as custom decorator for your app) as shown below:
9.) Use this decorator in your Freemarker screen that you created in last part as:
10.) Update your FTL files to follow HTML web standards and apply CSS on it as:
10. Now restart OFBiz as you have made entries to allowedPaths in web.xml. As it reloads hit https://localhost:8443/ofbizdemo/control/AddOfbizDemoFtl you should see page with custom styles that you have used instead of using default OFBiz theme. It should look like:
Here you can now play with it as you want. Try changing header or having new one, adding footer, putting in validations etc. So this way you can customize UI layer of OFBiz with Freemarker templates, CSS and JS.
You may want to add your own CSS or JS files, you can include those the same way we did for Bootstrap files.
If you have followed all the steps and developed practice application from this tutorial then this will help you in understanding other implementation in OFBiz. These things are basic foundation of working in OFBiz. Now you know, how you can start development in OFBiz. Don't leave behind the extra links provided in this tutorial as they will help you a lot in understanding the things which are given there in detail.
Here is another good reading can be of help is available at FAQ Tips Tricks Cookbook HowTo
Now the next thing comes in the way is the business processes which are really needed to be understood well for understanding OOTB process flow in OFBiz and OOTB data model, so for this, books are available at : OFBiz Related Books. Understanding well the OFBiz OOTB available data model and business processes will help in building better business solutions top of it.
Now you are ready to dive in. Welcome to OFBiz world.