With the Tenth Anniversary of Wicket behind us, Wicket is still one of the thriving survivors of the Great Web Framework Wars of the mid 00's. Is there a future for server-side frameworks? In this presentation Martijn Dashorst provides a brief history of Wicket.
With a State of the Wicket, Martijn will look at who is currently using Wicket, the community and current release plans.
The majority of this session will be dedicated to the future of Wicket: does a component oriented, Java web framework have a future in the era of native clients and client side JavaScript frameworks? Martijn will layout the plans of making Wicket more productive for current users, on integrating better with JavaEE technologies and much more.
The Apache Wicket community is working hard to build the new major release of Wicket. One of the tentpole features is the move to Java 8 as a minimum requirement. Why did we do that, and how does this improve my Wicket code? Learn how to apply Java 8 features such as lambdas and the new DateTime API in your Wicket applications, and learn what else the community is creating for your benefit.
This document provides an overview of the state of the Apache Wicket framework. It discusses Wicket's origins and history from 2004 to present, including major releases and contributions over time. It also summarizes key metrics about Wicket's codebase and community based on an Ohloh report, including lines of code, contributors, and estimated development effort. Finally, it previews possible future directions for Wicket in areas like Java 8 support, JavaScript integration, and semantic versioning.
The document provides 6 ways to keep work from interfering with weekends by testing and monitoring Wicket applications. It recommends using WicketTester for component and Ajax testing without starting the server. It also suggests using PageChecker to validate pages against a policy file, EntityChecker to detect non-serializable objects attached to pages, MarkupValidator to ensure valid HTML, RequestLogger for decoded request information, and monitoring tools like Nagios for uptime and performance of production applications.
Developing modern java web applications with java ee 7 and angular jsShekhar Gulati
This document outlines an agenda for a workshop on developing modern Java web applications with Java EE 7 and AngularJS. The workshop will be presented by Shekhar Gulati and will take participants through steps to develop a conference application using these technologies, including creating the Java EE 7 project, developing REST and asynchronous resources, integrating a Twitter streaming client, building the AngularJS UI, and deploying the application to OpenShift.
Apache Wicket: 10 jaar en verder - Martijn DashorstNLJUG
Wicket is een van de levendigste overlevers van de Grote Web Framework Oorlogen uit het midden van de jaren 2000: dit jaar vieren we het 10 jarige jubileum. Toch komt de vraag "Is er een toekomst voor serverside web frameworks" naar boven. In deze presentatie geeft Martijn Dashorst een kort overzicht van de geschiedenis van Wicket. Met een blik op de huidige stand van zaken, geeft hij een overzicht van de huidige gebruikers van Wicket, de toestand van de community en toekomstige release plannen. Het grootste deel van deze sessie zal worden besteed aan de toekomst van Wicket: heeft een component georienteerd Java web framework een toekomst in het tijdperk van native clients en client side JavaScript frameworks? Martijn zal de plannen presenteren om Wicket productiever te maken voor huidige gebruikers, beter te integreren met JavaEE technologieën en veel meer.
This document summarizes Java EE 7, JPA 2.1, EJB 3.2, CDI 1.1, JAX-RS 2.0, Payara Server, and AngularJS. It discusses new features and enhancements in Java EE 7 specifications like JPA 2.1 which added injectable entity listeners and automatic DDL generation. EJB 3.2 simplified remote views and disabled passivation. CDI 1.1 added interceptor binding and constructor callbacks. JAX-RS 2.0 included a client API and asynchronous support. Payara Server is an enhanced drop-in replacement for Glassfish. AngularJS is a JavaScript framework that uses HTML as a template and adds data binding and
Java REST API Framework Comparison - UberConf 2021Matt Raible
Use Spring Boot! No, use Micronaut!! Nooooo, Quarkus is the best!!!
There's a lot of developers praising the hottest, and fastest, Java REST frameworks: Micronaut, Quarkus, and Spring Boot. In this session, you'll learn how to do the following with each framework:
✅ Build a REST API
✅ Secure your API with OAuth 2.0
✅ Optimize for production with Docker and GraalVM
I'll also share some performance numbers and pretty graphs to compare community metrics.
Related blog post: https://developer.okta.com/blog/2021/06/18/native-java-framework-comparison
Java(ee) mongo db applications in the cloud Shekhar Gulati
This document provides an agenda and summary for a workshop on developing MongoDB applications on OpenShift presented by Shekhar Gulati. The agenda includes getting started with OpenShift, developing a location-aware Java EE application using JAX-RS and CDI for REST services, and MongoDB for the database. The document discusses OpenShift, JAX-RS, CDI, and MongoDB concepts. It also outlines code samples and steps to create and deploy a sample Twitter-like application on OpenShift that supports creating, finding, and geo-searching statuses.
The Apache Wicket community is working hard to build the new major release of Wicket. One of the tentpole features is the move to Java 8 as a minimum requirement. Why did we do that, and how does this improve my Wicket code? Learn how to apply Java 8 features such as lambdas and the new DateTime API in your Wicket applications, and learn what else the community is creating for your benefit.
This document provides an overview of the state of the Apache Wicket framework. It discusses Wicket's origins and history from 2004 to present, including major releases and contributions over time. It also summarizes key metrics about Wicket's codebase and community based on an Ohloh report, including lines of code, contributors, and estimated development effort. Finally, it previews possible future directions for Wicket in areas like Java 8 support, JavaScript integration, and semantic versioning.
The document provides 6 ways to keep work from interfering with weekends by testing and monitoring Wicket applications. It recommends using WicketTester for component and Ajax testing without starting the server. It also suggests using PageChecker to validate pages against a policy file, EntityChecker to detect non-serializable objects attached to pages, MarkupValidator to ensure valid HTML, RequestLogger for decoded request information, and monitoring tools like Nagios for uptime and performance of production applications.
Developing modern java web applications with java ee 7 and angular jsShekhar Gulati
This document outlines an agenda for a workshop on developing modern Java web applications with Java EE 7 and AngularJS. The workshop will be presented by Shekhar Gulati and will take participants through steps to develop a conference application using these technologies, including creating the Java EE 7 project, developing REST and asynchronous resources, integrating a Twitter streaming client, building the AngularJS UI, and deploying the application to OpenShift.
Apache Wicket: 10 jaar en verder - Martijn DashorstNLJUG
Wicket is een van de levendigste overlevers van de Grote Web Framework Oorlogen uit het midden van de jaren 2000: dit jaar vieren we het 10 jarige jubileum. Toch komt de vraag "Is er een toekomst voor serverside web frameworks" naar boven. In deze presentatie geeft Martijn Dashorst een kort overzicht van de geschiedenis van Wicket. Met een blik op de huidige stand van zaken, geeft hij een overzicht van de huidige gebruikers van Wicket, de toestand van de community en toekomstige release plannen. Het grootste deel van deze sessie zal worden besteed aan de toekomst van Wicket: heeft een component georienteerd Java web framework een toekomst in het tijdperk van native clients en client side JavaScript frameworks? Martijn zal de plannen presenteren om Wicket productiever te maken voor huidige gebruikers, beter te integreren met JavaEE technologieën en veel meer.
This document summarizes Java EE 7, JPA 2.1, EJB 3.2, CDI 1.1, JAX-RS 2.0, Payara Server, and AngularJS. It discusses new features and enhancements in Java EE 7 specifications like JPA 2.1 which added injectable entity listeners and automatic DDL generation. EJB 3.2 simplified remote views and disabled passivation. CDI 1.1 added interceptor binding and constructor callbacks. JAX-RS 2.0 included a client API and asynchronous support. Payara Server is an enhanced drop-in replacement for Glassfish. AngularJS is a JavaScript framework that uses HTML as a template and adds data binding and
Java REST API Framework Comparison - UberConf 2021Matt Raible
Use Spring Boot! No, use Micronaut!! Nooooo, Quarkus is the best!!!
There's a lot of developers praising the hottest, and fastest, Java REST frameworks: Micronaut, Quarkus, and Spring Boot. In this session, you'll learn how to do the following with each framework:
✅ Build a REST API
✅ Secure your API with OAuth 2.0
✅ Optimize for production with Docker and GraalVM
I'll also share some performance numbers and pretty graphs to compare community metrics.
Related blog post: https://developer.okta.com/blog/2021/06/18/native-java-framework-comparison
Java(ee) mongo db applications in the cloud Shekhar Gulati
This document provides an agenda and summary for a workshop on developing MongoDB applications on OpenShift presented by Shekhar Gulati. The agenda includes getting started with OpenShift, developing a location-aware Java EE application using JAX-RS and CDI for REST services, and MongoDB for the database. The document discusses OpenShift, JAX-RS, CDI, and MongoDB concepts. It also outlines code samples and steps to create and deploy a sample Twitter-like application on OpenShift that supports creating, finding, and geo-searching statuses.
This talk introduces Spring's REST stack - Spring MVC, Spring HATEOAS, Spring Data REST, Spring Security OAuth and Spring Social - while refining an API to move higher up the Richardson maturity model
This document provides an overview of developing RESTful web services with JAX-RS. It defines REST and compares it to SOAP, describes the principles of REST including giving resources IDs, standard methods, linking resources, content negotiation, and stateless communication. Code samples are provided to demonstrate JAX-RS annotations for resources, content negotiation, and processing form posts.
Modules in Java? Finally! (OpenJDK 9 Jigsaw, JSR376)Mihail Stoynov
This talk is for a very important new feature in Java SE 9. Code named Jigsaw, this feature modularizes the Java SE platform.
The coolest thing we do here is to create a custom JRE
Code: https://bitbucket.org/stybz/jigsaw.sty/
PPT: https://www.slideshare.net/mihailstoynov/modules-in-java-finally-openjdk-jigsaw
Video: https://www.youtube.com/watch?v=W5LeNPtPrqw
Spark IT 2011 - Developing RESTful Web services with JAX-RSArun Gupta
JAX-RS is a Java API for building RESTful web services. It uses annotations to simplify development of RESTful resources and defines standards for request/response formats and links between resources. JAX-RS services can be deployed to Java EE servers or standalone using implementations like Jersey. The future of JAX-RS includes enhancements to the client API, support for hypermedia formats, and tighter integration with Java EE technologies.
This document discusses using React with Grails 3. It begins with an overview of React, explaining key concepts like components, props, and state. It then covers different approaches to using React in Grails projects, including with the Asset Pipeline, Webpack, and the React profile for Grails which generates a project setup with React and Webpack configured. Isomorphic React, which allows server-side rendering with Nashorn, is also demonstrated. Resources for further learning about React, Grails plugins, and integrating the two frameworks are provided.
Better Front-end Development in Atlassian PluginsWojciech Seliga
Presentation showing these elements of plugin framework added in 2009 - 2011 which help us write easier much more sexier web 2.0 plugins. The talk then concentrates on Soy as the new templating mechanism which is getting very popular at Atlassian.
Video: https://www.youtube.com/watch?v=b6yLwvNSDck
Here's the showdown you've been waiting for: Node.js vs Play Framework. Both are popular open source web frameworks that are built for developer productivity, asynchronous I/O, and the real time web. But which one is easier to learn, test, deploy, debug, and scale? Should you pick Javascript or Scala? The Google v8 engine or the JVM? NPM or Ivy? Grunt or SBT? Two frameworks enter, one framework leaves.
This is the English version of the presentation. For the version with Japanese subtitles, see http://www.slideshare.net/brikis98/nodejs-vs-play-framework-with-japanese-subtitles
Microservices - java ee vs spring boot and spring cloudBen Wilcock
Spring Boot and Spring Cloud provide an easier and more productive framework for building cloud-native microservices compared to Java EE. Spring Boot simplifies the development, deployment, and management of microservices. Spring Cloud adds helpful capabilities for service discovery, external configuration, load balancing, and monitoring that are missing from Java EE. While Java EE adoption is declining, the use of Spring Boot and Spring Cloud is growing rapidly among developers.
CDI portable extensions are one of greatest features of Java EE allowing the platform to be extended in a clean and portable way. But allowing extension is just part of the story. CDI opens the door to a whole new eco-system for Java EE, but it’s not the role of the specification to create these extensions.
Apache DeltaSpike is the project that leads this brand new eco-system by providing useful extension modules for CDI applications as well as tools to ease the creation of new ones.
In this session, we’ll start by presenting the DeltaSpike toolbox and show how it helps you to develop for CDI. Then we’ll describe the major extensions included in DeltaSpike, including 'configuration', 'scheduling' and 'data'.
The document provides an overview of the DataFX framework, which facilitates data retrieval and rendering in JavaFX applications. It discusses how DataFX allows developers to focus on application logic by abstracting away things like data sources, conversion, and threading. Key aspects covered include DataSources and Readers for retrieving data from various sources; Converters for transforming data formats; DataProviders for populating Observable data in JavaFX; controller APIs for building views; and Flow APIs for linking views and handling user actions. The goal of DataFX is to simplify common tasks in building enterprise JavaFX applications that interact with real-world services and data.
In The Trenches With Tomster, Upgrading Ember.js & Ember DataStacy London
A few months after I started working with Ember.js & Ember Data at my new job we began a project to upgrade both. There were parts that were a breeze and others that were quite tricky. This talk walks you through some of the challenges we faced and how we solved them as well as how we began to prepare for the Ember 2.x architectural shift. Hopefully this talk will help save you some time when you decide to upgrade your Ember web application.
Apache Lucene is the de-facto standard open source library for Java developers to implement full-text-search capabilities.
While it’s thriving in its field, it is rarely mentioned in the scope of Java EE development.
In this talk we will see for which features many developers love Lucene, make some concrete examples of common problems it elegantly solves, and see some best practices about using it in a Java EE stack.
Finally we'll see how some popular OSS projects such as Hibernate ORM (JPA provider), WildFly (Java EE runtime) and Infinispan (in-memory datagrid, JCache implementor) actually provide great Lucene integration capabilities.
Web pages can get very complex and slow. In this talk, I share how we solve some of these problems at LinkedIn by leveraging composition and streaming in the Play Framework. This was my keynote for Ping Conference 2014 ( http://www.ping-conf.com/ ): the video is on ustream ( http://www.ustream.tv/recorded/42801129 ) and the sample code is on github ( https://github.com/brikis98/ping-play ).
The Making of the Oracle R2DBC Driver and How to Take Your Code from Synchron...VMware Tanzu
SpringOne 2021
Session Title:The Making of the Oracle R2DBC Driver and How to Take Your Code from Synchronous to Reactive
Speakers: Kuassi Mensah, Director of Product Management at Oracle; Michael McMahon, Principal Member of Technical Staff at Oracle
With Java 9 modules coming to us soon, you want your existing code to be fully ready for the module system. Making code modular can be a daunting task, but Java 9 comes with a number features to ease migration. This includes automatic modules, the unnamed module and a number of command line arguments.
In this talk we will look at examples of migrating real code. It discusses common problems youll run into during migration, leading to practical tips and the ability to set realistic goals. Its also a good way to understand the module system itself and the various migration paths it supports. This talk is an excellent preparation to start migrating your own code.
* Understanding modules and the module path
* Automatic modules
* Mixing classpath and modulepath
* Dealing with reflection
* Escape switches
* Jdeps
All topics will be based on examples of often used libraries and frameworks.
This document introduces AngularBeans, which aims to integrate AngularJS with Java EE backends using CDI. Some key points:
- AngularBeans allows defining Angular services using CDI beans, and enables features like dependency injection, JSON-RPC calls, and real-time capabilities between the frontend and backend.
- It supports concepts of single-page applications and thin server architectures. AngularBeans services can make HTTP requests, handle events, and communicate over websockets.
- Examples show how to create an AngularBean that exposes methods to the frontend, handle requests and return responses, access the backend via JSON-RPC calls, and implement real-time functionality using events and websockets.
It seems like keeping up to date with Java nowadays is an enormous task. Gone is the era of big, delayed Java releases that span years. We're now getting a new major release every six months. What's up with that? You're probably still developing on Java 8, even though Java 12 is already available.
Join this session to get a code-first overview of what's new in Java since Java 8. We'll give an overview of the module system (Java 9), the local-variable type inference feature (Java 10), the new HttpClient API (Java 11) and a sneak peek of Switch Expressions in Java 12. Expect lots of advice on what to expect when migrating beyond Java 8. It's time to embrace the newfound agility of the Java platform!
This document provides an overview and comparison of several popular PHP frameworks: CakePHP, Yii, Phalcon, Laravel, and Symfony. Code examples are shown for building a simple "Hello World" application in each framework. The pros and cons of each framework are discussed in terms of features, documentation, performance, and learning curve. Tips are provided on deciding which framework to use, avoiding framework lock-in over time, and when it may be better to avoid frameworks altogether in favor of plain PHP.
This document discusses Spring Boot and how it provides automatic configuration for common web application functionalities like JPA, security, and Spring MVC. It also covers how Spring Boot uses starter dependencies to select libraries automatically and provides tools like the CLI and Spring Initializr. The document then demonstrates creating a basic Spring Boot application and discusses testing Spring Boot applications using techniques like mocking Spring MVC and integrating tests.
Wicket in Action is the introduction I gave at the Øredev conference in Malmö, Sweden in November 2008. You'll learn about Wicket, Components, Models, Integrating Spring, Testing, and deploying your Wicket application.
Unfortunately slideshare doesn't work with accented letters in the URL, so I had to change the title.
This talk introduces Spring's REST stack - Spring MVC, Spring HATEOAS, Spring Data REST, Spring Security OAuth and Spring Social - while refining an API to move higher up the Richardson maturity model
This document provides an overview of developing RESTful web services with JAX-RS. It defines REST and compares it to SOAP, describes the principles of REST including giving resources IDs, standard methods, linking resources, content negotiation, and stateless communication. Code samples are provided to demonstrate JAX-RS annotations for resources, content negotiation, and processing form posts.
Modules in Java? Finally! (OpenJDK 9 Jigsaw, JSR376)Mihail Stoynov
This talk is for a very important new feature in Java SE 9. Code named Jigsaw, this feature modularizes the Java SE platform.
The coolest thing we do here is to create a custom JRE
Code: https://bitbucket.org/stybz/jigsaw.sty/
PPT: https://www.slideshare.net/mihailstoynov/modules-in-java-finally-openjdk-jigsaw
Video: https://www.youtube.com/watch?v=W5LeNPtPrqw
Spark IT 2011 - Developing RESTful Web services with JAX-RSArun Gupta
JAX-RS is a Java API for building RESTful web services. It uses annotations to simplify development of RESTful resources and defines standards for request/response formats and links between resources. JAX-RS services can be deployed to Java EE servers or standalone using implementations like Jersey. The future of JAX-RS includes enhancements to the client API, support for hypermedia formats, and tighter integration with Java EE technologies.
This document discusses using React with Grails 3. It begins with an overview of React, explaining key concepts like components, props, and state. It then covers different approaches to using React in Grails projects, including with the Asset Pipeline, Webpack, and the React profile for Grails which generates a project setup with React and Webpack configured. Isomorphic React, which allows server-side rendering with Nashorn, is also demonstrated. Resources for further learning about React, Grails plugins, and integrating the two frameworks are provided.
Better Front-end Development in Atlassian PluginsWojciech Seliga
Presentation showing these elements of plugin framework added in 2009 - 2011 which help us write easier much more sexier web 2.0 plugins. The talk then concentrates on Soy as the new templating mechanism which is getting very popular at Atlassian.
Video: https://www.youtube.com/watch?v=b6yLwvNSDck
Here's the showdown you've been waiting for: Node.js vs Play Framework. Both are popular open source web frameworks that are built for developer productivity, asynchronous I/O, and the real time web. But which one is easier to learn, test, deploy, debug, and scale? Should you pick Javascript or Scala? The Google v8 engine or the JVM? NPM or Ivy? Grunt or SBT? Two frameworks enter, one framework leaves.
This is the English version of the presentation. For the version with Japanese subtitles, see http://www.slideshare.net/brikis98/nodejs-vs-play-framework-with-japanese-subtitles
Microservices - java ee vs spring boot and spring cloudBen Wilcock
Spring Boot and Spring Cloud provide an easier and more productive framework for building cloud-native microservices compared to Java EE. Spring Boot simplifies the development, deployment, and management of microservices. Spring Cloud adds helpful capabilities for service discovery, external configuration, load balancing, and monitoring that are missing from Java EE. While Java EE adoption is declining, the use of Spring Boot and Spring Cloud is growing rapidly among developers.
CDI portable extensions are one of greatest features of Java EE allowing the platform to be extended in a clean and portable way. But allowing extension is just part of the story. CDI opens the door to a whole new eco-system for Java EE, but it’s not the role of the specification to create these extensions.
Apache DeltaSpike is the project that leads this brand new eco-system by providing useful extension modules for CDI applications as well as tools to ease the creation of new ones.
In this session, we’ll start by presenting the DeltaSpike toolbox and show how it helps you to develop for CDI. Then we’ll describe the major extensions included in DeltaSpike, including 'configuration', 'scheduling' and 'data'.
The document provides an overview of the DataFX framework, which facilitates data retrieval and rendering in JavaFX applications. It discusses how DataFX allows developers to focus on application logic by abstracting away things like data sources, conversion, and threading. Key aspects covered include DataSources and Readers for retrieving data from various sources; Converters for transforming data formats; DataProviders for populating Observable data in JavaFX; controller APIs for building views; and Flow APIs for linking views and handling user actions. The goal of DataFX is to simplify common tasks in building enterprise JavaFX applications that interact with real-world services and data.
In The Trenches With Tomster, Upgrading Ember.js & Ember DataStacy London
A few months after I started working with Ember.js & Ember Data at my new job we began a project to upgrade both. There were parts that were a breeze and others that were quite tricky. This talk walks you through some of the challenges we faced and how we solved them as well as how we began to prepare for the Ember 2.x architectural shift. Hopefully this talk will help save you some time when you decide to upgrade your Ember web application.
Apache Lucene is the de-facto standard open source library for Java developers to implement full-text-search capabilities.
While it’s thriving in its field, it is rarely mentioned in the scope of Java EE development.
In this talk we will see for which features many developers love Lucene, make some concrete examples of common problems it elegantly solves, and see some best practices about using it in a Java EE stack.
Finally we'll see how some popular OSS projects such as Hibernate ORM (JPA provider), WildFly (Java EE runtime) and Infinispan (in-memory datagrid, JCache implementor) actually provide great Lucene integration capabilities.
Web pages can get very complex and slow. In this talk, I share how we solve some of these problems at LinkedIn by leveraging composition and streaming in the Play Framework. This was my keynote for Ping Conference 2014 ( http://www.ping-conf.com/ ): the video is on ustream ( http://www.ustream.tv/recorded/42801129 ) and the sample code is on github ( https://github.com/brikis98/ping-play ).
The Making of the Oracle R2DBC Driver and How to Take Your Code from Synchron...VMware Tanzu
SpringOne 2021
Session Title:The Making of the Oracle R2DBC Driver and How to Take Your Code from Synchronous to Reactive
Speakers: Kuassi Mensah, Director of Product Management at Oracle; Michael McMahon, Principal Member of Technical Staff at Oracle
With Java 9 modules coming to us soon, you want your existing code to be fully ready for the module system. Making code modular can be a daunting task, but Java 9 comes with a number features to ease migration. This includes automatic modules, the unnamed module and a number of command line arguments.
In this talk we will look at examples of migrating real code. It discusses common problems youll run into during migration, leading to practical tips and the ability to set realistic goals. Its also a good way to understand the module system itself and the various migration paths it supports. This talk is an excellent preparation to start migrating your own code.
* Understanding modules and the module path
* Automatic modules
* Mixing classpath and modulepath
* Dealing with reflection
* Escape switches
* Jdeps
All topics will be based on examples of often used libraries and frameworks.
This document introduces AngularBeans, which aims to integrate AngularJS with Java EE backends using CDI. Some key points:
- AngularBeans allows defining Angular services using CDI beans, and enables features like dependency injection, JSON-RPC calls, and real-time capabilities between the frontend and backend.
- It supports concepts of single-page applications and thin server architectures. AngularBeans services can make HTTP requests, handle events, and communicate over websockets.
- Examples show how to create an AngularBean that exposes methods to the frontend, handle requests and return responses, access the backend via JSON-RPC calls, and implement real-time functionality using events and websockets.
It seems like keeping up to date with Java nowadays is an enormous task. Gone is the era of big, delayed Java releases that span years. We're now getting a new major release every six months. What's up with that? You're probably still developing on Java 8, even though Java 12 is already available.
Join this session to get a code-first overview of what's new in Java since Java 8. We'll give an overview of the module system (Java 9), the local-variable type inference feature (Java 10), the new HttpClient API (Java 11) and a sneak peek of Switch Expressions in Java 12. Expect lots of advice on what to expect when migrating beyond Java 8. It's time to embrace the newfound agility of the Java platform!
This document provides an overview and comparison of several popular PHP frameworks: CakePHP, Yii, Phalcon, Laravel, and Symfony. Code examples are shown for building a simple "Hello World" application in each framework. The pros and cons of each framework are discussed in terms of features, documentation, performance, and learning curve. Tips are provided on deciding which framework to use, avoiding framework lock-in over time, and when it may be better to avoid frameworks altogether in favor of plain PHP.
This document discusses Spring Boot and how it provides automatic configuration for common web application functionalities like JPA, security, and Spring MVC. It also covers how Spring Boot uses starter dependencies to select libraries automatically and provides tools like the CLI and Spring Initializr. The document then demonstrates creating a basic Spring Boot application and discusses testing Spring Boot applications using techniques like mocking Spring MVC and integrating tests.
Wicket in Action is the introduction I gave at the Øredev conference in Malmö, Sweden in November 2008. You'll learn about Wicket, Components, Models, Integrating Spring, Testing, and deploying your Wicket application.
Unfortunately slideshare doesn't work with accented letters in the URL, so I had to change the title.
Exemple d'application qui montre comment utiliser les bonnes pratiques de JEE pour développer un site web de commerce électronique en utilisant les outils :
- Eclipse comme environnement de développement
- Maven comme outil d’intégration
- JUnit comme Framework des tsts unitaire
- Spring IOC pour l'inversion de contrôle
- Spring MVC pour la couche web
- Spring Security pour la sécurité
- JPA, Hibernate
- Web Service SOAP
- Web Service REST
- Service RMI
Ce Support de cours Spring contient :
- Architecture JEE (Over view)
- Spring Overview
- Spring IOC
- Spring MVC
- Spring Integration (RMI, JaxWS, JaxRS, JMS, JMX,...)
- Spring Security
Bon apprentissage à tous
Support Dot Net avec C#. Ce cours traite les points suivants :
- Architecture .Net
- Les bases de C#
- Objet et Classe
- Héritage
- Encapsulation
- Polymorphisme
- Les exceptions
- Les entrées sorties
- Les interfaces graphiques
- Le multi Threading
- Programmation réseaux (Sockets et DataGram)
- Accès aux bases de données
The document discusses several key technologies for developing Java web applications, including Java Servlet technology, WebWork framework, Spring framework, and Apache Maven build tool. It provides an overview of how each technology addresses common problems like stateless communication, business logic implementation, view generation, and data access overhead. Examples are given showing how WebWork and Spring can be used together with Maven to build a simple "Hello World" application that follows the MVC pattern and leverages dependency injection.
The document outlines the chapters of a course on Servlets and JSP including introductions to Java web development, servlets, JSPs, MVC pattern, sharing information, advanced JSP concepts, using JavaBeans, JSP Expression Language, JSP Standard Tag Library, custom JSP tags, accessing databases, using JavaMail, securing applications, downloading files, listeners, and filters. It also describes setting up a basic web project structure and the lifecycle of a Java web application.
자바 웹 개발 시작하기 (1주차 : 웹 어플리케이션 체험 실습)DK Lee
The document provides instructions on setting up a Java web development environment and creating a simple "Hello World" web application using Java, Tomcat, Eclipse, and JSP. It discusses downloading and installing VirtualBox, Windows XP, JDK, Tomcat, Eclipse, and creating a basic JSP file to output "Hello World!". It then covers more advanced topics like connecting to a MySQL database using JDBC and performing CRUD operations.
The document discusses web containers and how they work. It begins with definitions of key terms like web container, web server, application server, and EJB container. It then explains that a web container is responsible for managing the lifecycle of servlets and mapping URLs to servlets. The document also discusses how web containers use servlet engines to execute servlets and JSP engines to execute Java Server Pages. It provides details on the popular Apache Tomcat web container, including how to install, configure, deploy applications to, and develop applications on Tomcat.
This document provides an overview of Java servlets, including what servlets are, their advantages over other technologies like CGI scripts, their lifecycle and program structure, deploying servlets on Tomcat, HTTP request methods, accessing request data, and redirecting URLs. Servlets are Java classes that extend functionality to handle HTTP requests and responses. They have advantages like faster performance than CGI scripts and reuse of the Java platform. The servlet lifecycle involves initialization, processing requests, and destruction. Servlets are deployed on a web container like Tomcat by compiling, configuring in web.xml, and placing in the webapps folder.
Html5 and beyond the next generation of mobile web applications - Touch Tou...RIA RUI Society
The document discusses upcoming features in HTML5 and beyond for developing mobile web applications, including offline web apps using the Application Cache, storing data locally using Web Storage, geolocation APIs, device orientation, camera access using getUserMedia, and media queries for responsive design. It provides code examples and encourages further reading on mobile web best practices.
The document provides an overview of beginning Java web applications, covering technologies like HTML, JSP, servlets, and MVC frameworks. It introduces the MVC model and explains that Struts is an MVC framework that implements the MVC pattern using XML configuration files to map actions and forward requests to JSP pages. The document also notes that the social networking site Hi5 uses the Struts framework.
Servlet and jsp development with eclipse wtpodilodif
This document provides a tutorial on developing servlets and JSPs with Eclipse WTP. It discusses installing Eclipse WTP and Tomcat, creating dynamic web projects, developing servlets and JSPs, running and deploying web applications on Tomcat using Eclipse WTP, and creating a WAR file. The tutorial contains numerous code examples and steps for setting up and using Eclipse WTP features.
The document provides an introduction to JBoss Seam by discussing the history of Java web applications and where Seam fits within that evolution. It notes that early Java web apps used JSP/Servlet models, which were improved by MVC frameworks like Struts, but these frameworks required many configuration files and the front-end and back-end were unaware of each other. Meanwhile, other languages like PHP and Ruby on Rails made deployment and testing easier through conventions over configuration and features like scaffolding. JBoss Seam aims to address these issues and provide a richer experience for modern web applications.
Ajax Frameworks in the J(2)EE Environmentstarchaser
The document compares Ajax frameworks that can be used in the J2EE environment. It provides an introduction to Ajax and the J2EE environment. It then discusses what a framework is and lists some comparison criteria. Finally, it summarizes two sample frameworks, Icefaces and Backbase, and provides a comparison table of their features.
Writing highly scalable WebSocket using the Atmosphere Framework and Scalajfarcand
- The document discusses the Atmosphere Framework, an open-source Java library that allows web applications to communicate in real-time via WebSocket or Comet techniques.
- It provides a uniform API that hides the complexities of different browser and server WebSocket implementations and allows fallback to alternative techniques like Comet.
- The framework integrates with various Java web servers and frameworks and supports Servlet, RESTful, and native WebSocket APIs to build scalable real-time applications.
This power point presentation provides an overview of advance Java topics including servlets, session handling, database handling, JSP, Struts, MVC, and Hibernate. It begins with a brief introduction of Java and its history. It then discusses advance Java topics like J2EE, servlets, session handling using different techniques. It also covers database handling using JDBC and topics like JSP, Struts framework, MVC pattern, Tiles framework, and Hibernate for object-relational mapping.
The document discusses the authors' experience writing automated regression tests for a web application using Cucumber, Watir, and other tools. They started with Watir but found it had limitations, so tried Webrat and Selenium instead, but debugging was difficult in Selenium. They switched back to Watir which allowed direct DOM manipulation and running tests in parallel browsers. Cucumber was used as a common language across the automated tests. Writing tests helped them better understand the application and find bugs.
This document provides an overview of JSR 168 portlet development with examples. It discusses key concepts like portlets, the portlet container, and portals. It shows how to create a basic portlet by extending GenericPortlet and overriding methods like doView and processAction. The document also covers supporting classes, the portlet lifecycle, and deploying portlet applications with Maven.
- The document provides an overview of servlet technology including servlet basics, lifecycle, important classes, and Apache Tomcat implementation.
- It describes how to set up a development environment with Tomcat and IDEs like Eclipse, and covers servlet structure, deployment, mapping, and configuration using the web.xml file.
- An example basic servlet class is shown extending HttpServlet and implementing doGet and doPost methods.
Introduction to JQuery, ASP.NET MVC and SilverlightPeter Gfader
This document provides an overview of a presentation on jQuery, ASP.NET MVC, and Silverlight. It discusses jQuery being a lightweight JavaScript library that makes web development simpler. ASP.NET MVC is presented as an alternative to WebForms that separates concerns into models, views, and controllers. Silverlight is introduced as a technology for building rich interactive applications for the web using .NET.
The document discusses the key components and steps for creating and deploying a Java web application. It covers:
1. The main steps to develop a web application including coding components, adding deployment descriptors, compiling, packaging, deploying, and accessing the application.
2. The web components included in the TomEE distribution like JSF, JSP, Servlets.
3. How TomEE+ adds additional components like JAX-RS and JAX-WS.
4. An overview of asynchronous servlets in JavaEE7 which allow non-blocking I/O to improve scalability compared to traditional synchronous approaches.
Full Stack Reactive with React and Spring WebFlux - Dublin JUG 2019Matt Raible
You have streaming data and want to expose it as reactive streams with Spring Boot. Great!
Spring WebFlux makes that pretty easy. But what about the UI? Can you stream that data to the UI and have it be reactive and constantly updating too?
This session explores techniques for making your app fully reactive with Spring WebFlux and React. Mostly live coding, with plenty of time for Q & A in the midst of it all.
* Blog post: https://developer.okta.com/blog/2018/09/25/spring-webflux-websockets-react
* Screencast: https://youtu.be/1xpwYe154Ys
This document discusses using WebSockets for bidirectional communication between a GWT client and server. It provides an overview of setting up WebSocket connections on both the client and server sides in GWT, including writing a JSNI wrapper to initialize the WebSocket on the client. It also discusses using GWT's existing RPC serialization mechanism to serialize and deserialize Java objects sent over the WebSocket connection, avoiding the need for additional serialization libraries. Code examples are provided for initializing the WebSocket and handling messages on both the client and server sides, as well as using GWT's serialization streams to serialize and deserialize objects between the client and server.
The document provides an overview of Java web applications and deployment using Apache Tomcat web application server. It discusses what a web container is, how Tomcat works as a web container, and how to install, run and configure Tomcat. It also describes how to create Java web applications that can be deployed as WAR files, and how to define servlets and mappings in the web deployment descriptor (web.xml). Finally, it shows how to create a simple web application and deploy it on Tomcat.
HTMX: Web 1.0 with the benefits of Web 2.0 without the grift of Web 3.0Martijn Dashorst
- HTMX is a JavaScript library that allows any HTML element to interact as a hypermedia component by adding attributes that instruct HTMX on what requests to make and how to update the DOM.
- Attributes like hx-get, hx-post, hx-target, and hx-swap allow elements to make requests and update other elements without JavaScript. Inherited attributes remove repetition.
- HTMX requests can be detected on the server via request headers, and response headers can modify requests by changing targets or swapping mechanisms. Classes provide feedback during requests.
While our predecessor product(s) were a COBOL application and later a Windows client/server application distributed on floppies, since 2005 we rock a Java web application that has gone through a lot of changes to keep up with the times. No longer duplicating 5 1/4” 1.2M floppies over the weekend and mailing them to our customers, but a single `git push` will deliver our latest version to our customers.
In this session you will learn how we made our application survive for 18 years and still be relevant. Learn how we rearchitected our application from 2005 to 2022, and more importantly, what we did wrong so you can avoid our mistakes. We migrated from Java 1.4 to Java 17, we moved from tomcat+hibernate+velocity via tomcat+hibernate+wicket+cxf+axis+spring+jgroups+ehcache to wildfly+wicket, from deploying on physical hardware to virtual kubernetes nodes. From manually scp-ing releases to gitops, and from Oracle to Postgresql, causing a 5 week outage.
If you learn only one thing from Martijn Dashorst’s session: always have a plan B.
A short introduction to the SOLID principles of Object Oriented Programming in (mostly) Dutch.
- Single responsibility
- Open/Closed
- Lishkov Substitution
- Interface Segregation
- Dependency Inversion
This presentation was given at a meetup for Working Spirit in Deventer.
Converting 85% of Dutch Primary Schools from Oracle to PostgreSQLMartijn Dashorst
This case study describes migrating the most used application for primary schools in the Netherlands from Oracle to PostgreSQL. The application uses a multi-tenant, single schema database (i.e. 6000 schools in a single database) and runs using a typical Java EE frontend.
You will learn about our application architecture, hardware platform, reasons for switching, migration strategies considered and the results of our migration.
Since the CFP closes one week before our actual migration we can't reveal the results in this abstract, but the presentation will capture all the things that went wrong and well
The document discusses solutions for when documentation avoidance fails. It recommends using plain text formats like Markdown or AsciiDoc to write documentation, keeping documentation and code together, integrating documentation into development processes using tools like Git, Maven and Docker, and automating documentation testing and generation as much as possible. The document provides examples of using Arquillian, Maven, AShot and Graphene to automate the creation of a user manual with screenshots from automated tests. The goal is to produce an up-to-date user manual with high test coverage through continuous integration of documentation with code.
The document proposes a "Code Review Drinking Game" where certain common code review occurrences trigger sips of a drink, such as using "Random" instead of "secureRandom", TODO comments, or merge conflicts in committed code. It includes drinking game rules for both Java and JavaScript code reviews. The goal is to have an entertaining way to conduct code reviews by turning typical issues into opportunities to drink.
Java Serialization is often considered a dark art of Java programmers. This session will lift the veil and show what serialization is and isn't, how you can use it for profit and evil. After this session no NotSerializableException will be unconquerable.
How can you make code reviews more palatable? This drinking game will make any code review interesting and enjoyable. For Java/.Net programmers, and a special drinking game for JavaScript code reviews.
Na jaren projecten te duur en te laat opgeleverd te hebben met de waterval projectmethodiek heeft de IT industrie een nieuwe projectaanpak omarmt als de zilveren kogel die te late en te dure projecten achter zich zou laten. Door in korte iteraties op je doel af te gaan, waarbij het doel ook nog eens mag bewegen beloven deze nieuwe projectaanpakken als Scrum gouden bergen. Maakt deze beweging de belofte waar en is deze aanpak een goede match voor het (project)onderwijs?
In deze sessie legt Martijn Dashorst kort de moderne projectaanpakken uit, Scrum in het bijzonder, en hoe deze binnen Topicus toegepast worden om van koffie software te maken. Tot slot kijkt Martijn vanuit de onderwijspraktijk naar hoe goed Scrum matcht binnen het Hoger Onderwijs om zo de geschikheid van deze aanpak voor projectgroepen te analyseren.
Who Automates the Automators? (Quis Automatiet Ipsos Automates?)Martijn Dashorst
Who automates the automators? For a lot of people the future seems uncertain: automation may eat their jobs. Old and new industries are ripe for disruption: transportation, healthcare, education, finance, law and even the culinary industry are being automated as we speak. When chauffeurs and truck drivers fear that they won't be able to hitch a ride into the future, should the automators perhaps wonder... when is it our turn to be automated? Who automates the automators?
Martijn Dashorst takes a look at the future of the programmer: are we also without a job when the last doctor, lawyer, 3-star chef and driver have been automated?
Het oorspronkelijke verhaal van de Schone Coder geschreven door de gebroeders Scrum over hoe Assertpoetser in een vervloekt project terecht kwam dat het rijk in 100 jaar technical debt stortte. Kan Prinses Agile hem op tijd redden? Sprintten ze nog lang en gelukkig?
In deze lunchlezing vertelt Martijn Dashorst over het wel en wee van de coder die in een wereld vol tegenstrijdige belangen probeert te overleven en zinvol werk te leveren. Hoe krijg je een goede hygiene voor jou, je omgeving en je code? Hoe voorkom je 10 jaar lange technical debt? Met meer dan 20 jaar ontwikkelervaring biedt Martijn een blik in de keuken van een professionele software ontwikkelaar.
This document provides an overview of Apache Wicket, a Java web application framework. It begins with an introduction to Wicket and its core concepts like components. It then walks through an example of creating a simple cheese store application with Wicket, including setting up the project, adding domain models and entities, and building out components. The document also discusses how to use Enterprise JavaBeans (EJBs) with Wicket, such as making data access objects (DAOs) into EJBs and injecting them.
Presentation about Apache Wicket given at FOSDEM 2011. Apache Wicket is an open source, component oriented Java web framework. This presentation features an introduction to the Wicket framework and showcases some of the new features in the upcoming 1.5 release of Wicket.
A Dutch presentation (with English quotes) about the ongoing renaissance in software engineering where we transition from begin regarded as mere drones to software craftsmen. This presentation is heavily influenced by Robert C. Martin's The Renaissance of Craftsmanship.
The document provides guidance for successfully graduating a project from the Apache Software Foundation (ASF) Incubator within a year. It outlines that the ASF is a US nonprofit organization with around 2000 committers and 250 members supporting 60 open source projects through a collaborative development process. Participants who want to join an existing community or grow their own are advised to consider entering the ASF Incubator.
Presentation on Apache Wicket delivered at JavaPolis 2007 in Antwerp. We introduce Wicket, learn the concepts and go through developing an online Cheese store
Wicket Live on Stage features a Wicket project that has been in production use for over a year. The application is a web application for dutch highschools for administration of students' data for funding, guidance, graduation, attendance and financial purposes.
The presentation describes the road to choosing Wicket as the core framework, and includes screenshots of the live demo (which isn't captured in this presentation) of Vocus (http://www.vocuslis.nl).
Why Mobile App Regression Testing is Critical for Sustained Success_ A Detail...kalichargn70th171
A dynamic process unfolds in the intricate realm of software development, dedicated to crafting and sustaining products that effortlessly address user needs. Amidst vital stages like market analysis and requirement assessments, the heart of software development lies in the meticulous creation and upkeep of source code. Code alterations are inherent, challenging code quality, particularly under stringent deadlines.
Do you want Software for your Business? Visit Deuglo
Deuglo has top Software Developers in India. They are experts in software development and help design and create custom Software solutions.
Deuglo follows seven steps methods for delivering their services to their customers. They called it the Software development life cycle process (SDLC).
Requirement — Collecting the Requirements is the first Phase in the SSLC process.
Feasibility Study — after completing the requirement process they move to the design phase.
Design — in this phase, they start designing the software.
Coding — when designing is completed, the developers start coding for the software.
Testing — in this phase when the coding of the software is done the testing team will start testing.
Installation — after completion of testing, the application opens to the live server and launches!
Maintenance — after completing the software development, customers start using the software.
Utilocate offers a comprehensive solution for locate ticket management by automating and streamlining the entire process. By integrating with Geospatial Information Systems (GIS), it provides accurate mapping and visualization of utility locations, enhancing decision-making and reducing the risk of errors. The system's advanced data analytics tools help identify trends, predict potential issues, and optimize resource allocation, making the locate ticket management process smarter and more efficient. Additionally, automated ticket management ensures consistency and reduces human error, while real-time notifications keep all relevant personnel informed and ready to respond promptly.
The system's ability to streamline workflows and automate ticket routing significantly reduces the time taken to process each ticket, making the process faster and more efficient. Mobile access allows field technicians to update ticket information on the go, ensuring that the latest information is always available and accelerating the locate process. Overall, Utilocate not only enhances the efficiency and accuracy of locate ticket management but also improves safety by minimizing the risk of utility damage through precise and timely locates.
Enterprise Resource Planning System includes various modules that reduce any business's workload. Additionally, it organizes the workflows, which drives towards enhancing productivity. Here are a detailed explanation of the ERP modules. Going through the points will help you understand how the software is changing the work dynamics.
To know more details here: https://blogs.nyggs.com/nyggs/enterprise-resource-planning-erp-system-modules/
E-commerce Development Services- Hornet DynamicsHornet Dynamics
For any business hoping to succeed in the digital age, having a strong online presence is crucial. We offer Ecommerce Development Services that are customized according to your business requirements and client preferences, enabling you to create a dynamic, safe, and user-friendly online store.
Top Features to Include in Your Winzo Clone App for Business Growth (4).pptxrickgrimesss22
Discover the essential features to incorporate in your Winzo clone app to boost business growth, enhance user engagement, and drive revenue. Learn how to create a compelling gaming experience that stands out in the competitive market.
Artificia Intellicence and XPath Extension FunctionsOctavian Nadolu
The purpose of this presentation is to provide an overview of how you can use AI from XSLT, XQuery, Schematron, or XML Refactoring operations, the potential benefits of using AI, and some of the challenges we face.
Takashi Kobayashi and Hironori Washizaki, "SWEBOK Guide and Future of SE Education," First International Symposium on the Future of Software Engineering (FUSE), June 3-6, 2024, Okinawa, Japan
OpenMetadata Community Meeting - 5th June 2024OpenMetadata
The OpenMetadata Community Meeting was held on June 5th, 2024. In this meeting, we discussed about the data quality capabilities that are integrated with the Incident Manager, providing a complete solution to handle your data observability needs. Watch the end-to-end demo of the data quality features.
* How to run your own data quality framework
* What is the performance impact of running data quality frameworks
* How to run the test cases in your own ETL pipelines
* How the Incident Manager is integrated
* Get notified with alerts when test cases fail
Watch the meeting recording here - https://www.youtube.com/watch?v=UbNOje0kf6E
Mobile App Development Company In Noida | Drona InfotechDrona Infotech
Looking for a reliable mobile app development company in Noida? Look no further than Drona Infotech. We specialize in creating customized apps for your business needs.
Visit Us For : https://www.dronainfotech.com/mobile-application-development/
Graspan: A Big Data System for Big Code AnalysisAftab Hussain
We built a disk-based parallel graph system, Graspan, that uses a novel edge-pair centric computation model to compute dynamic transitive closures on very large program graphs.
We implement context-sensitive pointer/alias and dataflow analyses on Graspan. An evaluation of these analyses on large codebases such as Linux shows that their Graspan implementations scale to millions of lines of code and are much simpler than their original implementations.
These analyses were used to augment the existing checkers; these augmented checkers found 132 new NULL pointer bugs and 1308 unnecessary NULL tests in Linux 4.4.0-rc5, PostgreSQL 8.3.9, and Apache httpd 2.2.18.
- Accepted in ASPLOS ‘17, Xi’an, China.
- Featured in the tutorial, Systemized Program Analyses: A Big Data Perspective on Static Analysis Scalability, ASPLOS ‘17.
- Invited for presentation at SoCal PLS ‘16.
- Invited for poster presentation at PLDI SRC ‘16.
SOCRadar's Aviation Industry Q1 Incident Report is out now!
The aviation industry has always been a prime target for cybercriminals due to its critical infrastructure and high stakes. In the first quarter of 2024, the sector faced an alarming surge in cybersecurity threats, revealing its vulnerabilities and the relentless sophistication of cyber attackers.
SOCRadar’s Aviation Industry, Quarterly Incident Report, provides an in-depth analysis of these threats, detected and examined through our extensive monitoring of hacker forums, Telegram channels, and dark web platforms.
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(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
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26. What is Wicket?
Apache Wicket
From Wikipedia, the free encyclopedia
Apache Wicket, commonly referred to as
Wicket, is a lightweight component-based web
application framework for the Java programming
language conceptually similar to JavaServer
Faces and Tapestry. It was originally written by
Jonathan Locke in April 2004. Version 1.0 was
released in June 2005. It graduated into an
Apache top-level project in June 2007.[2]
45. User Manual
195
25 Wicket Internals
25.1 Page storing
During request handling, Wicket manages page instances through interface
. This interface creates a new page instance ororg.apache.wicket.request.handler.IPageProvider
loads a previously serialized page instance if we provide the corrisponding page id. delegatesIPageProvider
page creation and retrieval to interface . When pageorg.apache.wicket.request.mapper.IPageSource
class is provided delegates page creation to interface ,IPageSource org.apache.wicket.IPageFactory
while when page id is provided it uses interface to load theorg.apache.wicket.page.IPageManager
previously serialized page.
The following workflow diagram summarizes the mechanism seen so far:
IPageManager
's task is to manage which pages have been used in a requestorg.apache.wicket.page.IPageManager
and store their last state in the backing stores, namely . The default implementationIPageStore
collects all stateful pages which have been used in theorg.apache.wicket.page.PageStoreManager
request cycle (more than one page can be used in a single request if for example orsetResponsePage()
is used). At the end of the request all collected page instances are being storedRestartResponseException
in the first level cache - http session. They are stored in http session attribute named
and passed to the underlying"wicket:persistentPageManagerData-APPLICATION_NAME" IPageStore
. When the next http request comes will ask for page with specific id andIPageProvider PageStoreManager
will look first in the http session and if no match is found then it will delegate to the IPageStore. At the end of the
second request the http session based cache is being overwritten completely with the newly used page
instances.
To setup another implementation useIPageManager
. Theorg.apache.wicket.Application.setPageManagerProvider(IPageManagerProvider)
custom implementation may or may not use .IPageManager IPageStore/IDataStore
IPageStore
's role is to mediate the storing and loading of pages done byorg.apache.wicket.pageStore.IPageStore
the underlying . The default implementationIDataStore
pre-processes the pages before passing them toorg.apache.wicket.pageStore.DefaultPageStore
183
As you can see above, the Exception gets raised during the initialization of the instance evenWicketTester
before the actual test method gets executed. Even though we have applied rather cool and simple annotation
based test configuration already described and passed in perfectly well prepared ApplicationContext instance to
the WicketTester instance in the constructor, somewhere down the rabbit hole someone complained that no
WebApplicationContext instance could have been found which seems to be required in order to initialize the
WicketTester properly.
The problem that we run against here is due to the fact that SpringComponentInjector during its own initialization
is trying to get hold of an according Spring's ApplicationContext instance that would normally be there in a
runtime environment but does not find any since we are running in a test environment currently.
SpringComponentInjector delegates to Spring's own WebApplicationContextUtils class to retrieve the instance of
ApplicationContext out of the ServletContext which is perfectly fine for a runtime environment but is unfortunately
failing in a test environment:
public WebApplicationContext getRequiredWebApplicationContext(ServletContext sc)static
IllegalStateException {throws
WebApplicationContext wac = getWebApplicationContext(sc);
(wac == ) {if null
IllegalStateException(throw new "No WebApplicationContext found: no
);ContextLoaderListener registered?"
}
wac;return
}
If you still remember we defined a ContextLoaderListener in our web.xml file as part of the configuration of our
runtime environment that makes sure an according WebApplicationContext instance gets initialized and
registered against the ServletContext properly. Luckily, this problem can easily be solved if we slightly change
the way we initialize SpringComponentInjector in our main MyWebApplication class. Apart from the constructor
that we have used so far, there is another constructor in the SpringComponentInjector class that expects the
caller to provide it with an according ApplicationContext instance rather than trying to resolve one on its own:
public SpringComponentInjector(WebApplication webapp, ApplicationContext ctx,
wrapInProxies)boolean
{
(webapp == )if null
{
IllegalArgumentException( );throw new "Argument [[webapp]] cannot be "null
}
(ctx == )if null
{
IllegalArgumentException( );throw new "Argument [[ctx]] cannot be "null
}
// store context in application's metadata …
webapp.setMetaData(CONTEXT_KEY, ApplicationContextHolder(ctx));new
// … and create and register the annotation aware injector
InjectorHolder.setInjector( AnnotSpringInjector( ContextLocator(),new new
46. In a Nutshell, Wicket...
… has had 18,255 commits made by 62 contributors
representing 318,037 lines of code
… is mostly written in Java with
a well-commented source code
… has a well established, mature codebase maintained
by a large development team with stable Y-O-Y
commits
… took an estimated 84 years of effort (COCOMO model)
starting with its first commit in September, 2004
ending with its most recent commit 1 days ago
– openhub.net report for Wicket
77. What if we delay adding
components?
Queue components until their location
in the markup hierarchy is know
markupContainer.add(new Label(...));
markupContainer.queue(new Label(...));
78. public class HomePage extends WebPage {
public HomePage() {
WebMarkupContainer container =
new WebMarkupContainer("container");
add(container);
container.add(new Label("title", "Hello!"));
}
}
public class HomePage extends WebPage {
public HomePage() {
queue(new WebMarkupContainer("container"));
queue(new Label("title", "Hello!"));
}
}
90. Component Queuing
• Wicket 7 feature
• Prefer queue() when markup hierarchy can be altered
• Uniqueness of Wicket IDs still requirement at same
level of queuing
• Can move down into child markup hierarchy
• Can't move up the markup hierarchy
96. ILinkListener l = () -> {
System.out.println("Klik");
}
ILinkListener l = new ILinkListener(){
@Override
public void onLinkClicked() {
System.out.println("Klik");
}
}
or