JavaOne 2007 - TS4721
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The document discusses tips, tricks, and design patterns for implementing Java EE applications using Enterprise JavaBeans (EJB) 3 technology. It covers pitfalls and best practices for session beans, entity beans, and message-driven beans. It also discusses refactoring techniques and both old and new design patterns like the session facade and interceptors.
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---
# FAQ - why does my code throw a null pointer exception - common reason #1 Redeclaration
- Using `@BeforeClass` or `@Before` can setup data for use in tests
- Any 'variables' we instantiate need to be 'fields' rather than variables
- We want to instantiate them in the setup method rather than redeclare them
---
# Example of the Problem
I know I will use an `Adder` in my test so I create it as a field:
~~~~~~~~
public class WhyCodeThrowsNullPointerExceptionTest {
Adder adder;
~~~~~~~~
I don't want to re-instantiate it each time so I make an `@BeforeClass` method to instantiate it:
~~~~~~~~
@BeforeClass
public static void setupAdder(){
Adder adder = new Adder();
}
~~~~~~~~
**Warning: Error in the above code**
---
# Semantic Error
I just made a Semantic coding error. This won't be caught by a compiler, but it will cause my `@Test` to fail with a Null Pointer Exception.
In the setup method I really wanted to assign a value to the field, instead I created an new variable with the same name.
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---
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- Using `@BeforeClass` or `@Before` can setup data for use in tests
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---
# Example of the Problem
I know I will use an `Adder` in my test so I create it as a field:
~~~~~~~~
public class WhyCodeThrowsNullPointerExceptionTest {
Adder adder;
~~~~~~~~
I don't want to re-instantiate it each time so I make an `@BeforeClass` method to instantiate it:
~~~~~~~~
@BeforeClass
public static void setupAdder(){
Adder adder = new Adder();
}
~~~~~~~~
**Warning: Error in the above code**
---
# Semantic Error
I just made a Semantic coding error. This won't be caught by a compiler, but it will cause my `@Test` to fail with a Null Pointer Exception.
In the setup method I really wanted to assign a value to the field, instead I created an new variable with the same name.
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- Try to write working isolated tests and then refactor to a more general solution when you need it - that way, you know it was working, so you just have to work backwards to find out what went wrong
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However, if your tests are not maintainable they may end up slowing you down and causing you painful headaches, compilation errors and spurious failures. To avoid that, your unit tests should be significant; expressive; clean; DRY; non-overlapping; and blazing fast. Writing good tests becomes the toughest challenge for any developer, no matter how battle-hardened: you need to balance risk with test maintenance costs, while looking out for test design smells that call for [risky] refactoring to drive your design towards a set of key principles (included:).
Principles that will end up shaping the way you craft the Production code itself. Because in the end, a good, clean design is more important than coverage%.
But testing gives you the best feedback to get there.
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- The enhanced for loop is generally better than a basic for loop for iterating over arrays but a counted loop may be faster for performance critical code.
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Visão Geral da plataforma de Integração WSO2 que reúne 3 perfis: Integration( ESB e DSS), Business Process (BPMN, BPS) e Mensageria (Message Broker)
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O documento discute a transformação digital de uma perspectiva pragmática. Apresenta exemplos de como empresas como a Expedia usam APIs para ter participação no mercado de viagens. Discutem os passos importantes para a transformação digital incluindo governança, liderança, inovação e plataformas. Finalmente, fornece detalhes sobre a empresa WSO2 e suas soluções para transformação digital.
WSO2 Novo Modelo de Subscrições e Produtos 2017
O documento apresenta as principais plataformas e soluções de integração, gestão de APIs, identidade e acesso e análise de dados da WSO2 para impulsionar transformações digitais, incluindo informações sobre a empresa, clientes, investidores e modelos de negócio.
WSO2 API Manager 2.0 - Overview
WSO2 API Manager 2.0.0 is a complete open source API management solution that allows users to create, publish, protect, and manage the lifecycles of APIs. It includes features such as a developer portal, API testing tools, an API gateway, analytics reporting, and support for multi-tenancy. The solution can be deployed on-premises, as a managed service, or as software as a service (SaaS) and is highly scalable.
Workshop WSO2 BPS 3.5.x - BPMN
This document provides an overview of creating a basic BPMN workflow process in WSO2 BPS 3.5. It includes instructions on installing WSO2 BPS, creating a new BPMN project in Eclipse using the Activiti plugin, designing a simple "Open Bank Account" process with steps like data entry forms, decision points, and human tasks, deploying the process to WSO2 BPS, and accessing the running process via REST APIs. The goal is to demonstrate the basic BPMN capabilities of WSO2 BPS like designing, deploying and executing BPMN 2.0 processes.
WSO2 Telco MCX
The document discusses WSO2.Telco's Mobile Connect Accelerator product. It provides a digital enablement platform that allows telcos to power APIs for identity, payments and other services. The platform uses open source microservices and supports both on-premise and cloud deployments. It enables telcos to expose customer identity and other data to third parties via APIs while meeting security and compliance standards. The platform currently supports over 1 billion customers globally.
Workshop MSF4J - Getting Started with Microservices and Java
In this tutorial you will learn the basics about Microservices with Java using the MSF4J, which is a very lightweight and rich framework.
WSO2 API Manager : Going beyond the just API Management
In this presentation we show the tangible benefits from WSO2 API Manager, but also going a little beyond with WOS2 Platform
Workshop/Tutorial WSO2 Micro Services Server
In this tutorial/workshop slide deck we show how you can get started with WSO2 Microservices Server, we are covering:
- Introduction
- Running Kubernetes, Docker and Containers with MSS
- Analytics on MSS
Hope you can enjoy!
WSO2 Micro Services Server - Basic Workshop Part 1
This workshops drives you to drop a real experience in to use a very pragmatic and lightweight solution for Microservices. This is the Part 1 of 2.
Conectando Turismo e Viagens - Plataforma WSO2
Entenda como podemos apoiar na inovação da indústria de turismo, viagem, lazer e loyalty com alguns conceitos chave para seus negócios dos próximos 5 anos.
WSO2 Application Server como Alternativa ao Tomcat
Veja como podemos apoiar seu ambiente que está repleto de Tomcats que podem ser difíceis de gerenciar, monitorar etc. Breve visão do WSO2 AppServer em conjunto com o WSO2 BAM.
Plus de Edgar Silva (20)
Flyweigth - Arquitetura de Referência para Open Banking Brasil Fase 1
Flyweigth - Arquitetura de Referência para Open Banking Brasil Fase 1
WSO2 Enterprise Integrator 6.1 - Integração na Era da Transformação
WSO2 Enterprise Integrator 6.1 - Integração na Era da Transformação
Workshop MSF4J - Getting Started with Microservices and Java
Workshop MSF4J - Getting Started with Microservices and Java
WSO2 API Manager : Going beyond the just API Management
WSO2 API Manager : Going beyond the just API Management
WSO2 Micro Services Server - Basic Workshop Part 1
WSO2 Micro Services Server - Basic Workshop Part 1
WSO2 Application Server como Alternativa ao Tomcat
WSO2 Application Server como Alternativa ao Tomcat
Dernier
Brian Fitzsimmons on the Business Strategy and Content Flywheel of Barstool S...
On episode 272 of the Digital and Social Media Sports Podcast, Neil chatted with Brian Fitzsimmons, Director of Licensing and Business Development for Barstool Sports.
What follows is a collection of snippets from the podcast. To hear the full interview and more, check out the podcast on all podcast platforms and at www.dsmsports.net
一比一原版新西兰奥塔哥大学毕业证（otago毕业证）如何办理
一模一样【微信：A575476】【新西兰奥塔哥大学毕业证（otago毕业证）成绩单Offer】【微信：A575476】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
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二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：A575476】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
How are Lilac French Bulldogs Beauty Charming the World and Capturing Hearts....
“After being the most listed dog breed in the United States for 31
years in a row, the Labrador Retriever has dropped to second place
in the American Kennel Club's annual survey of the country's most
popular canines. The French Bulldog is the new top dog in the
United States as of 2022. The stylish puppy has ascended the
rankings in rapid time despite having health concerns and limited
color choices.”
Unveiling the Dynamic Personalities, Key Dates, and Horoscope Insights: Gemin...
Explore the fascinating world of the Gemini Zodiac Sign. Discover the unique personality traits, key dates, and horoscope insights of Gemini individuals. Learn how their sociable, communicative nature and boundless curiosity make them the dynamic explorers of the zodiac. Dive into the duality of the Gemini sign and understand their intellectual and adventurous spirit.
Top 10 Free Accounting and Bookkeeping Apps for Small Businesses
Maintaining a proper record of your money is important for any business whether it is small or large. It helps you stay one step ahead in the financial race and be aware of your earnings and any tax obligations.
However, managing finances without an entire accounting staff can be challenging for small businesses.
Accounting apps can help with that! They resemble your private money manager.
They organize all of your transactions automatically as soon as you link them to your corporate bank account. Additionally, they are compatible with your phone, allowing you to monitor your finances from anywhere. Cool, right?
Thus, we’ll be looking at several fantastic accounting apps in this blog that will help you develop your business and save time.
2022 Vintage Roman Numerals Men Rings
Discover timeless style with the 2022 Vintage Roman Numerals Men's Ring. Crafted from premium stainless steel, this 6mm wide ring embodies elegance and durability. Perfect as a gift, it seamlessly blends classic Roman numeral detailing with modern sophistication, making it an ideal accessory for any occasion.
https://rb.gy/usj1a2
Dpboss Matka Guessing Satta Matta Matka Kalyan Chart Indian Matka
Dpboss Matka Guessing Satta Matta Matka Kalyan Chart Indian Matka➒➌➎➏➑➐➋➑➐➐Dpboss Matka Guessing Satta Matka Kalyan Chart Indian Matka
9356872877Sattamatka.satta.matka.satta matka.kalyan weekly chart.kalyan chart.kalyan jodi chart.kalyan penal chart.kalyan today.kalyan open.fix satta.fix fix fix Satta matka nambar.Business storytelling: key ingredients to a story
Storytelling is an incredibly valuable tool to share data and information. To get the most impact from stories there are a number of key ingredients. These are based on science and human nature. Using these elements in a story you can deliver information impactfully, ensure action and drive change.
NIMA2024 | De toegevoegde waarde van DEI en ESG in campagnes | Nathalie Lam |...
Nathalie zal delen hoe DEI en ESG een fundamentele rol kunnen spelen in je merkstrategie en je de juiste aansluiting kan creëren met je doelgroep. Door middel van voorbeelden en simpele handvatten toont ze hoe dit in jouw organisatie toegepast kan worden.
The Most Inspiring Entrepreneurs to Follow in 2024.pdf
In a world where the potential of youth innovation remains vastly untouched, there emerges a guiding light in the form of Norm Goldstein, the Founder and CEO of EduNetwork Partners. His dedication to this cause has earned him recognition as a Congressional Leadership Award recipient.
3 Simple Steps To Buy Verified Payoneer Account In 2024
Buy Verified Payoneer Account: Quick and Secure Way to Receive Payments
Buy Verified Payoneer Account With 100% secure documents, [ USA, UK, CA ]. Are you looking for a reliable and safe way to receive payments online? Then you need buy verified Payoneer account ! Payoneer is a global payment platform that allows businesses and individuals to send and receive money in over 200 countries.
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❼❷⓿❺❻❷❽❷❼❽ Dpboss Matka Result Satta Matka Guessing Satta Fix jodi Kalyan Fin...
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Innovation Management Frameworks: Your Guide to Creativity & InnovationOperational Excellence Consulting
[To download this presentation, visit:
https://www.oeconsulting.com.sg/training-presentations]
This PowerPoint compilation offers a comprehensive overview of 20 leading innovation management frameworks and methodologies, selected for their broad applicability across various industries and organizational contexts. These frameworks are valuable resources for a wide range of users, including business professionals, educators, and consultants.
Each framework is presented with visually engaging diagrams and templates, ensuring the content is both informative and appealing. While this compilation is thorough, please note that the slides are intended as supplementary resources and may not be sufficient for standalone instructional purposes.
This compilation is ideal for anyone looking to enhance their understanding of innovation management and drive meaningful change within their organization. Whether you aim to improve product development processes, enhance customer experiences, or drive digital transformation, these frameworks offer valuable insights and tools to help you achieve your goals.
INCLUDED FRAMEWORKS/MODELS:
1. Stanford’s Design Thinking
2. IDEO’s Human-Centered Design
3. Strategyzer’s Business Model Innovation
4. Lean Startup Methodology
5. Agile Innovation Framework
6. Doblin’s Ten Types of Innovation
7. McKinsey’s Three Horizons of Growth
8. Customer Journey Map
9. Christensen’s Disruptive Innovation Theory
10. Blue Ocean Strategy
11. Strategyn’s Jobs-To-Be-Done (JTBD) Framework with Job Map
12. Design Sprint Framework
13. The Double Diamond
14. Lean Six Sigma DMAIC
15. TRIZ Problem-Solving Framework
16. Edward de Bono’s Six Thinking Hats
17. Stage-Gate Model
18. Toyota’s Six Steps of Kaizen
19. Microsoft’s Digital Transformation Framework
20. Design for Six Sigma (DFSS)
To download this presentation, visit:
https://www.oeconsulting.com.sg/training-presentationsThe latest Heat Pump Manual from Newentide
𝐔𝐧𝐯𝐞𝐢𝐥 𝐭𝐡𝐞 𝐅𝐮𝐭𝐮𝐫𝐞 𝐨𝐟 𝐄𝐧𝐞𝐫𝐠𝐲 𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲 𝐰𝐢𝐭𝐡 𝐍𝐄𝐖𝐍𝐓𝐈𝐃𝐄’𝐬 𝐋𝐚𝐭𝐞𝐬𝐭 𝐎𝐟𝐟𝐞𝐫𝐢𝐧𝐠𝐬
Explore the details in our newly released product manual, which showcases NEWNTIDE's advanced heat pump technologies. Delve into our energy-efficient and eco-friendly solutions tailored for diverse global markets.
Profiles of Iconic Fashion Personalities.pdf
The fashion industry is dynamic and ever-changing, continuously sculpted by trailblazing visionaries who challenge norms and redefine beauty. This document delves into the profiles of some of the most iconic fashion personalities whose impact has left a lasting impression on the industry. From timeless designers to modern-day influencers, each individual has uniquely woven their thread into the rich fabric of fashion history, contributing to its ongoing evolution.
Income Tax exemption for Start up : Section 80 IAC
A presentation on the concept of Exemption of Profits of Start ups from Income Tax
Best Forex Brokers Comparison in INDIA 2024
Navigating the world of forex trading can be challenging, especially for beginners. To help you make an informed decision, we have comprehensively compared the best forex brokers in India for 2024. This article, reviewed by Top Forex Brokers Review, will cover featured award winners, the best forex brokers, featured offers, the best copy trading platforms, the best forex brokers for beginners, the best MetaTrader brokers, and recently updated reviews. We will focus on FP Markets, Black Bull, EightCap, IC Markets, and Octa.
Digital Marketing with a Focus on Sustainability
Digital Marketing best practices including influencer marketing, content creators, and omnichannel marketing for Sustainable Brands at the Sustainable Cosmetics Summit 2024 in New York
DearbornMusic-KatherineJasperFullSailUni
My powerpoint presentation for my Music Retail and Distribution class at Full Sail University
Dernier (20)
Brian Fitzsimmons on the Business Strategy and Content Flywheel of Barstool S...
Brian Fitzsimmons on the Business Strategy and Content Flywheel of Barstool S...
How are Lilac French Bulldogs Beauty Charming the World and Capturing Hearts....
How are Lilac French Bulldogs Beauty Charming the World and Capturing Hearts....
Unveiling the Dynamic Personalities, Key Dates, and Horoscope Insights: Gemin...
Unveiling the Dynamic Personalities, Key Dates, and Horoscope Insights: Gemin...
Top 10 Free Accounting and Bookkeeping Apps for Small Businesses
Top 10 Free Accounting and Bookkeeping Apps for Small Businesses
Dpboss Matka Guessing Satta Matta Matka Kalyan Chart Indian Matka
Dpboss Matka Guessing Satta Matta Matka Kalyan Chart Indian Matka
NIMA2024 | De toegevoegde waarde van DEI en ESG in campagnes | Nathalie Lam |...
NIMA2024 | De toegevoegde waarde van DEI en ESG in campagnes | Nathalie Lam |...
Registered-Establishment-List-in-Uttarakhand-pdf.pdf
Registered-Establishment-List-in-Uttarakhand-pdf.pdf
The Most Inspiring Entrepreneurs to Follow in 2024.pdf
The Most Inspiring Entrepreneurs to Follow in 2024.pdf
3 Simple Steps To Buy Verified Payoneer Account In 2024
3 Simple Steps To Buy Verified Payoneer Account In 2024
❼❷⓿❺❻❷❽❷❼❽ Dpboss Matka Result Satta Matka Guessing Satta Fix jodi Kalyan Fin...
❼❷⓿❺❻❷❽❷❼❽ Dpboss Matka Result Satta Matka Guessing Satta Fix jodi Kalyan Fin...
Innovation Management Frameworks: Your Guide to Creativity & Innovation
Innovation Management Frameworks: Your Guide to Creativity & Innovation
Income Tax exemption for Start up : Section 80 IAC
Income Tax exemption for Start up : Section 80 IAC
JavaOne 2007 - TS4721
- 1. Implementing Java EE Applications using Enterprise JavaBeans (EJB) 3 Technology: Real World Tips, Tricks, and New Design Patterns Fabiane Bizinella Nardon CTO Zilics www.zilics.com TS-4721 Edgar Silva Solutions Architect JBoss, a division of Red Hat www.jboss.com
- 14. Detached Entities and Lazy Loading public Patient getPatientData(PK id) { Patient p = entityManager.find(id); p.getDocuments().size(); // O bjects detach automatically when they // are serialized or when a persistence context ends. // The specification does not define any way to // explicitly detach objects. } public void updatePatient(Patient p) { Patient p = entityManager.merge(p); }