In a Web application, you often need to manage information that is shown to the user. Managing the information means to create, update, or delete information. With WebRatio Platform you can easily model an administration section so that the Web application user can manage the application data.
In t...
In a Web application, feedback messages are used to notify the user about the result of a business logic execution.
Feedback messages vary depending on message types, which can be: success, information, warning, or error.
Most Web applications have protected sections that only registered user can access. Users must remember the credentials provided for each site to which they subscribe.
When users are no longer able to authenticate themselves because they have lost or forgotten their passwords, it is necessary to pr...
In a Web Application, we often need to grant different groups of users access to different resources. For example, in a Web Application used for Enterprise Resource Planning, the head of Human Resources will have access to all the employees’ sensitive data (such as person details, salary, etc.), whi...
Granting access to protected resources is a key aspect of many Web applications.
From an interface point of view, you need to define a place for users to insert and validate their credentials.
This lesson shows you how to model the user login and logout. You will learn how you can personalize the ...
The ability to show a list of elements and the details of each listed element is the one of the most common patterns in Web applications, and is called the Master and Details pattern.
In a previous lesson, you already learned how to model the basic Master and Details pattern.
This lesson shows y...
In a Web application, you often need to manage the information shown to the user. Managing information means to create, update, or delete information. With WebRatio Platform you can easily model an Administration section in which the Web application user can manage the application data.
In this le...
In a Web application, you often need to manage the information shown to the user.
Managing information means to create, update, or delete information.
In this lesson we discuss an enhanced version of the Data Management pattern, which allows you to manage more than one piece of information at th...
This is the first lesson that explains the Domain Model in WebRatio Platform.
In this lesson, we introduce the main concepts related to the Domain Model, including a deep analysis of the notation adopted - Entity Relationship (E-R). The following lessons show some detailed content and will explain ...
In the lesson dedicated to the Domain Model Overview, you learned about the Entity-Relationship model and its main concepts: Entity, Attribute and Relationship.
The representation of the Domain Model in WebRatio Platform is quite similar to the Entity-Relationship notation ad it is based on the sam...
Learn how to speed up your productivity by letting WebRatio Platform create physical elements on the database starting from your Domain Model, or letting it extract the Domain Model starting from an existing database structure.
Forget about writing SQL by hand! WebRatio Platform helps you generate ...
Learn how to enrich the Domain Model with calculated information, derived from the materialized data existing in the Domain Model itself. This process is called "derivation", since it creates redundant information that can become handy when defining IFML models. Derivation can be applied by using va...
Modeling the domain information managed by the Web Application is a task that can be easily done with WebRatio. In fact, you have at your disposal many options that allow you to easily create the Domain Model starting from an existing database. Nevertheless you may need to manually add some new obje...
When you are working on a new Web application, you will need to implement a set of common features. In the previous lessons you learned how to model these features in IFML, concentrating on the user interaction.
These features cover how to publish and maintain information, as well as the login ...
When you are working on a Web application you have to consider both the user interaction and the application behavior executed when the user triggers an action. The application behavior can be any kind of business logic you may need to express.
WebRatio Platform provides you with a set of componen...
In a Web application, you often need to manage information that is shown to the user. Managing the information means to create, update, or delete information. With WebRatio Platform you can easily model an administration section so that the Web Application user can manage the application data.
In t...
When you are working on a new Web application there is a set of common requirements that you are going to implement many times. In IFML lessons you learned how to model several commonly recurring requirements focused on the user interaction.
Recurring requirements comprehend how to publish and ma...
WebRatio Platform provides a built-in feature for the localization of Web applications.
The localization is based on the usage of keys instead of terms for all the static elements of the Web application (e.g., labels, components and page titles, field labels and so on). WebRatio Platform allows use...
Usually, Web applications are not standalone; they need to integrate with external systems and other applications in the company intranet. The best way to make different Applications communicate with one another is to use a Web service infrastructure.
That’s why it is important to know how you can...
Usually Web applications do not exist standalone but need to integrate with external systems and applications already existing in the company intranet.
The best way to make different applications communicate with one another is using a Web Service infrastructure.
That’s why it is important to kn...
The best way to make different applications communicate with one another is using a Web Service infrastructure. That’s why it is important to know how you can easily integrate your WebRatio Platform designed application with existing web services. This lesson gives you the knowledge to help you inv...
Usually, Web applications do not exist standalone but need to integrate with external systems and applications that are on the company intranet. The best way to make different applications communicate with one another is by using a Web Service infrastructure. That’s why it is important to know how y...
Usually Web applications are not standalone; they need to integrate with external systems and other applications in the company intranet. The best way to make different applications communicate with one another is to use a Web Service infrastructure. That’s why it is important to know how you can ea...
Usually Web applications are not standalone; they need to integrate with external systems and other applications in the company intranet. The best way to make different applications communicate with one another is to use a Web service infrastructure. That’s why it is important to know how you can ea...
Data management is a crucial aspect for data-centric Web applications. So far, you have learned how to create, read, update and delete data through basic patterns. However, information often needs to be displayed and dealt with in different ways.
Displaying data through View Components is not the o...
Data management is the crucial aspect for Data Centric Web applications. So far you learnt how to create, read, update and delete data, but data is meant to be shown in so many different ways.
Reading data through View Component is not the only option you have in WebRatio Platform.
Imagine that y...
When you are testing a feature of your Web application, you may face some problems that prevent the feature from working properly. Using the "Application Logs" is the best way to understand what’s going on, find out the root cause of the undesired behavior and eventually understand which part of the...
To get the Web Application from your Web Project, you have to generate it. When a project is generated, the Application Server loads the corresponding Web Application. WebRatio uses Apache Tomcat as the default Application Server Apache.
Tomcat implements the JavaServer Pages (JSP) and Sun Microsys...
Debugging is a fundamental tool for developing a reliable Web application. In the standard debugging approach, every time a problem arises or whenever you want to investigate the behavior of your application, you can easily debug it by placing breakpoints in your lines of code.
Debugging with WebRa...
The deploy process of a Web application is the final step of the application development. In a structured company, the Web application must pass different tests before going to production.
Usually companies have several different environments where the Web application must be deployed and tested.
...
This lesson gives you the basic knowledge required to define reusable portions of IFML models using the module and module definition concepts.
Working on real-world Web applications may require modeling a large project. In this situation it’s important to be able to manage the project to avoid loss...
This lesson gives you the basic knowledge required to define common content in an IFML Model through the "Master Page" concept.
Working on real-world Web applications may require modeling a large project. In this situation it’s important to be able to manage the project to avoid loss of control and...
In Apache Tomcat, the Manager element represents the session manager that will be used to create and maintain HTTP sessions as requested by the associated Web Application.
Read this article to know how to disable the Persistent Session Management in any Tomcat installation.
The Java Naming and Directory Interface (JNDI) is an API for directory service that allows clients to discover and lookup data and objects via a name. Like all Java APIs that interface with host systems, JNDI is independent of the underlying implementation. Additionally, it specifies a service provi...
A search engine uses a set of well known rules to decide the visibility of a website. One of these rules is to have simple URLs containing the keywords the page should be indexed with. WebRatio 6 introduces a new feature named URL Fragments. This feature allows to increase the search engine ranking ...
WebRatio Platform gives you the chance to add a Captcha control to the forms of your Web Project.
Read this article to know more about the Captcha control.
The Connect Operation is an operation used to enable the association between instances of two entities (the source entity and the target entity), connected by a specific relationship role.
This article guides you to the usage of the Connect showing also a working example.
The Disconnect Operation is an operation used to delete the association between instances of two entities (the source entity and the target entity), connected by a predefined relationship role.
This article guides you to the usage of the Disconnect showing also a working example.
The Reconnect is an Operation Component used to modify the association between instances of two entities (the Source Entity and the Target Entity), connected by a predefined Relationship Role.
The Reconnect can manage single instances or sets of instances in order to connect or disconnect one in...
The Query Component is available starting from the WebRatio 5.1 version. It's a Utility Component that permits to execute a custom edited query using the HQL(Hibernate Query Language) or SQL query language. Moreover it can dynamically compose an HQL query depending on the incoming Domain Model ident...
The Stored Procedure is an Operation that allows calling a procedure stored in a database.
To use this Component correctly, the procedure must be previously created in your database.
Discover how to use the Stored Procedure reading this article.
The Parameter Collector Operation permits one to collect a set of parameters from multiple sources and to redistribute them to multiple targets. In this way, the operation reduces the model complexity by deleting some data flows, improving its reading and creating a neater model.
The Jump Operation permits to jump forward and backward within the application without modeling an explicit navigation flow. A forward jump redirects the user to the specified Parameter Collector Operation. A backward jump redirects the user to the last visited Jump Operation and follows that operat...
The Math is an Utility Component designed to parse and evaluate mathematical expressions. A mathematical expression is composed by variables and operators and can be either statically defined at modeling time or dynamically provided through an input parameter at run-time. The Math replaces the varia...
Sometimes may happens that a user has to access to a content and depending on some parameters or actions that content has to change. By the alternative pages,it's possible to decide which content has to be shown depending on one or more conditions defined at run time.
Alternative element is usefu...
WebRatio introduced the chance to use Visibility Conditions in a Web Project. This feature allows you to disable or show elements in the generated Web application if the conditions specified for those elements are verified.
It is now possible to integrate the horizontal profiling of the Web appli...
A job is a sequence of operations that has to be executed asynchronously by the application. It's possible to schedule a job at a specific time or interval, which means that jobs can be automatically triggered (scheduled when the application starts). It's also possible to schedule a job at runtime: ...
In a Web application you may need to specify a piece of business logic that is executed periodically.
In this case, the execution is not triggered directly by a user interaction on the Web application, but is triggered automatically at a specific timestamp. WebRatio Platform lets you model this ...
Reloading an entire page can be expensive in terms of computational costs: it means recomputing all the components contained on a page and the queries included in them. This operation can take some time and have a significant impact on performance. For this reason, a partial refresh of the page can ...
Popups are a commonly used rich interaction. By using a popup you can open a new layer above the current main page. If the popup is set as “Modal”, it also prevents any interaction with the rest of the web application. When the popup window is closed, the underlying main page becomes active again, a...