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Kai Wähner

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Technology Evangelist at Confluent

Effeltrich, DE

Joined Jun 2010

https://www.kai-waehner.de

About

Kai Waehner works as Technology Evangelist at Confluent. Kai’s main area of expertise lies within the fields of Big Data Analytics, Machine Learning / Deep Learning, Messaging, Integration, Microservices, Internet of Things, Stream Processing and Blockchain. He is regular speaker at international conferences such as JavaOne, O’Reilly Software Architecture or ApacheCon, writes articles for professional journals, and shares his experiences with new technologies on his blog (www.kai-waehner.de/blog). Contact and references: kontakt@kai-waehner.de / @KaiWaehner / www.kai-waehner.de

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Articles

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The Data Streaming Landscape 2024
This article presents a comparison of open-source Apache Kafka and Flink stream processing products, cloud, competition, and market trends.
March 20, 2024
· 2,904 Views · 2 Likes
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MQTT Market Trends for 2024: Cloud, Unified Namespace, Sparkplug, Kafka Integration
Market trends for MQTT: Data Governance with Unified Namespace and Sparkplug B, OPC-UA Debates, and Integration with Apache Kafka for OT/IT.
March 13, 2024
· 1,370 Views · 1 Like
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Why Tiered Storage for Apache Kafka Is a Big Thing
This blog post explores the architecture, use cases, benefits, and a case study for storing Petabytes of data in the Kafka commit log.
February 26, 2024
· 1,396 Views · 1 Like
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Top 5 Trends for Data Streaming With Kafka and Flink in 2024
Top 5 Trends for Data Streaming with Apache Kafka and Flink: data sharing, data contracts, multi-cloud, serverless stream processing, GenAI.
February 19, 2024
· 3,674 Views · 2 Likes
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The State of Data Streaming for Healthcare With Kafka and Flink
Data Streaming with Apache Kafka and Apache Flink enables IT modernization and innovation at healthcare companies like Humana, BHG, and Recursion.
February 9, 2024
· 3,653 Views · 1 Like
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Apache Kafka + Vector Database + LLM = Real-Time GenAI
How Apache Kafka, Flink, and Vector Databases with semantic search make an LLM and GenAI reliable with real-time context.
January 31, 2024
· 1,976 Views · 1 Like
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The State of Data Streaming With Apache Kafka and Flink in the Gaming Industry
This article covers the architectures, use cases, and case studies for data streaming with Kafka and Flink in the gaming industry, including Kakao Games, Blizzard, and MPL.
January 26, 2024
· 4,119 Views · 1 Like
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How Apache Kafka Helps Dish Wireless Building Cloud-Native 5G Telco Infrastructure
Apache Kafka helps Dish Wireless as data fabric in its cloud-native 5G infrastructure for real-time use cases in retail, logistics, IoT, and so on.
January 19, 2024
· 4,065 Views · 2 Likes
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Policy Enforcement and Data Quality for Apache Kafka With Schema Registry
Data governance with policy enforcement and data contracts for good data quality in Apache Kafka using enhanced Schema Registry APIs.
January 4, 2024
· 4,123 Views · 1 Like
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How Michelin Improves Aftermarket Sales and Customer Service With Apache Kafka
How Michelin improves aftermarket sales and customer service in the automotive industry with business process choreography using Apache Kafka.
December 22, 2023
· 3,351 Views · 1 Like
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How Lufthansa Uses Apache Kafka for Data Integration and Machine Learning
The airline Lufthansa uses Apache Kafka as cloud-native middleware for data integration and as data fabric for analytics and machine learning.
December 19, 2023
· 3,821 Views · 2 Likes
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The State of Data Streaming for Insurance in 2023
Explore data streaming powered by Apache Kafka in the insurance industry, including use cases and cloud architectures of Allianz, Generali, and more.
December 8, 2023
· 2,229 Views · 1 Like
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Real-Time Advertising With Apache Kafka and Flink
Real-time advertising platform built with Apache Kafka and Apache Flink showing case studies of Pinterest, Uber, Unity, Buzzwil, Reddit, etc.
December 8, 2023
· 4,905 Views · 1 Like
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Modernizing SCADA Systems and OT/IT Integration With Apache Kafka
Explore the modernization of SCADA Systems and hybrid cloud OT/IT infrastructure with data streaming powered by Apache Kafka.
November 16, 2023
· 2,917 Views · 4 Likes
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The State of Data Streaming for Energy and Utilities in 2023
Use cases, architectures, and case studies for Apache Kafka in the energy and utilities industry, including IoT, AI, blockchain, and cybersecurity.
November 3, 2023
· 3,891 Views · 2 Likes
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The State of Data Streaming for the Public Sector in 2023
This post explores data streaming use cases and architecture in the public sector and government with case studies from the US DoD, NASA, Deutsche Bahn, etc.
October 30, 2023
· 2,106 Views · 4 Likes
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Apache Kafka as Mission Critical Data Fabric for GenAI
Apache Kafka as real-time machine learning infrastructure for GenAI, chatbots, and large language models in mission-critical deployments.
October 5, 2023
· 2,158 Views · 3 Likes
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The State of Data Streaming for Digital Natives (Born in the Cloud)
Explore digital natives born in the cloud, leverage Apache Kafka for innovation and new business models, and discover trends, architectures, and case studies.
September 22, 2023
· 3,625 Views · 4 Likes
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The State of Data Streaming for Telco
The state of data streaming in the telco industry, including customer stories from Dish Network, British Telecom, Globe Telecom, and Swisscom.
September 11, 2023
· 2,002 Views · 3 Likes
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Quix Streams: Stream Processing With Kafka and Python
Quix Streams for open source stream processing with Kafka and Python to support data engineers to implement machine learning data pipelines.
September 1, 2023
· 4,028 Views · 4 Likes
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Data Streaming From Smart Factory to Cloud
Real-time synchronization between the Smart Factory and cloud applications with reliable Data Streaming powered by Apache Kafka, e.g., BMW.
August 18, 2023
· 3,257 Views · 2 Likes
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Apache Kafka as Workflow and Orchestration Engine
Architectures and case studies for data streaming with the Apache Kafka ecosystem as stateful workflow orchestration and BPM engine.
August 8, 2023
· 3,364 Views · 2 Likes
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The State of Data Streaming for Retail in 2023
The state of data streaming in retail, including omnichannel, hybrid shopping and live commerce from Walmart, Albertsons, Otto, AO, and more.
July 23, 2023
· 3,351 Views · 2 Likes
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Apache Kafka Is Not a Race, It Is a Journey!
Success stories from data streaming journeys with Apache Kafka across banking, retail, insurance, manufacturing, healthcare, energy, and software companies.
June 28, 2023
· 5,416 Views · 3 Likes
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The State of Data Streaming for Financial Services in 2023
The state of data streaming in financial services explores case studies from Capital One, Citi, SGX, and Raiffeisen powered by Apache Kafka.
June 9, 2023
· 3,521 Views · 2 Likes
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The State of Data Streaming for Manufacturing
The state of data streaming in the manufacturing industry explores case studies from BMW, Mercedes, Michelin, and Siemens powered by Apache Kafka.
June 1, 2023
· 2,213 Views · 2 Likes
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Apache Kafka vs. Message Queue: Trade-Offs, Integration, Migration
Message broker vs. data streaming — trade-offs, integration, and migration scenarios from JMS, IBM MQ, TIBCO, or ActiveMQ to Apache Kafka.
May 18, 2023
· 4,091 Views · 2 Likes
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Global Supply Chain With Kafka and IoT
Transforming global supply chain with data streaming and IoT for end-to-end visibility and decision-making in real-time at BMW, Bosch, and Walmart.
May 12, 2023
· 6,121 Views · 2 Likes
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Apache Kafka + Apache Flink = Match Made in Heaven
Discover the pros and cons of Apache Kafka for data streaming in combination with Apache Flink (or Kafka Streams) for stream processing.
May 5, 2023
· 7,872 Views · 6 Likes
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The Daily Life of a Field CTO
Field CTO is a C-level developer advocate and evangelist that can talk business and technology and collaborates with sales, marketing, and product management.
April 26, 2023
· 2,278 Views · 3 Likes

Comments

Displaying Meaningful Error Messages when Auto Loading Classes in PHP 5

Feb 23, 2012 · Mr B Loid

@James: I think you interpret it wrongly: "Interesting - we're one day into the poll and it seems that over half of the people who responded are happy with Java 6."

You cannot deduce this from the question. The answers do not say if someone is happy or why someone did (not) change yet. Therefore, you should either change the question or the answers :-)

Many people would like to migrate to Java 7 probably to use its advantages. But it is not allowed / reasonable in several projects...

Displaying Meaningful Error Messages when Auto Loading Classes in PHP 5

Feb 23, 2012 · Mr B Loid

@James: I think you interpret it wrongly: "Interesting - we're one day into the poll and it seems that over half of the people who responded are happy with Java 6."

You cannot deduce this from the question. The answers do not say if someone is happy or why someone did (not) change yet. Therefore, you should either change the question or the answers :-)

Many people would like to migrate to Java 7 probably to use its advantages. But it is not allowed / reasonable in several projects...

Metaprogramming

Jan 11, 2012 · Gerd Storm

I just wrote an article, which explains my experiences with Apache Camel and its alternatives Spring Integration and Mule ESB:

Spoilt for Choice: Which Integration Framework to use - Spring Integration, Mule ESB or Apache Camel?


Best regards,
Kai Wähner (Twitter: @KaiWaehner)
Spring Integration and Apache Camel

Jan 11, 2012 · Biju Kunjummen

I just wrote an article, which explains my experiences with Apache Camel and its alternatives Spring Integration and Mule ESB:

Spoilt for Choice: Which Integration Framework to use - Spring Integration, Mule ESB or Apache Camel?


Best regards,
Kai Wähner (Twitter: @KaiWaehner)
Python Cookbook : Explicit Tail Call

Oct 14, 2011 · Gerd Storm

My Scala skills lie anywhere in between novice and medium. I understand the code, but it takes some time.

I am no fan of "you can do THIS in only X lines with THAT language". I prefer using one or two additional lines. It is much easier to read, also for good developers IMO.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

PHP's DateTime object and unix times..

Oct 14, 2011 · Stefan Koopmanschap

Thanks for your comments.

@André: Well, you are right: You should not consider only product costs (they are not much cheaper for Liferay than for Oracle), but the whole development cycle. Maybe my article was a little bit unclear about this!

I see, you have a lot more experience with Portlets than me. We did not go any further, because we decided that a Portal / Portlets are not reasonable for our project.

Regarding the Oracle stack: We only evaluated the Portal which Oracle offered us combined with its Oracle SOA Suite (WebCenter). I did not make the choice, I just had to evaluate it...

@Erron: As already mentioned, I do not have much experience with Portlets. We decided that it is too much extra effort without creating a prototype or so :-) Thus, I cannot tell you anything about the GWT Portlet plugin. Maybe someone else can?

Pros and Cons – When to use a Portal and Portlets instead of just Java Web-Frameworks

Oct 14, 2011 · Kai Wähner

Thanks for your comments.

@André: Well, you are right: You should not consider only product costs (they are not much cheaper for Liferay than for Oracle), but the whole development cycle. Maybe my article was a little bit unclear about this!

I see, you have a lot more experience with Portlets than me. We did not go any further, because we decided that a Portal / Portlets are not reasonable for our project.

Regarding the Oracle stack: We only evaluated the Portal which Oracle offered us combined with its Oracle SOA Suite (WebCenter). I did not make the choice, I just had to evaluate it...

@Erron: As already mentioned, I do not have much experience with Portlets. We decided that it is too much extra effort without creating a prototype or so :-) Thus, I cannot tell you anything about the GWT Portlet plugin. Maybe someone else can?

Password cracking tools for SQL Server

Jul 18, 2011 · Tony Thomas

Good article. I agree that a SQL database built on NoSQL foundations would be the best solution, and sufficient in 80 percent. Nevertheless, I wonder if such a solution will be available soon.

I also discussed the problem "NoSQL vs. SQL" shortly in my article about Google App Engine (GAE) with Spring Roo: http://www.kai-waehner.de/blog/2011/07/18/rapid-cloud-development-with-spring-roo-%E2%80%93-part-1-google-app-engine-gae.

I think that there are some reasons why Google developers do not support SQL (yet), but only NoSQL using BigTable. Is uses several different concepts - and these concepts seem to be necessary for offering good scalability in the cloud at the moment.

Everyone should be aware that GAE is the only production-ready PaaS solution in the Java environment at the moment. For instance, VMware Cloud Foundry will support MySQL from the beginning, but it is still in BETA status. I assume that it is not that easy to offer good scalability using MySQL as database in the cloud. I also assume that Google developers know what they do and why they do not offer a SQL solution for GAE yet. Nevertheless, I am really looking forward to the final release of Cloud Foundry.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

PDF embedded within HTML page

Jul 11, 2011 · Saleh AlSaffar

Traits are my favorite feature in Scala.They are easy to understand, do solve the "diamond problem" of multiple inheritance and give a lot of opportunities to seperate and structure code.

I would appreciate if Traits make it to Java. That would be much more important than Closures and all this stuff (because e.g. Closures will be ugly in Java, no matter which syntax will finally be chosen)...

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Open Source Java Web Application Generator

Jun 24, 2011 · $$ANON_USER$$

Hey Matt,

I really like JSF 2.0, it is much more productive than older versions. I think many (other) people still use their old knowlegde of JSF 1.x and do comparisons as they do with EJBs. Of course, JSF is not as productive as Spring Roo, Play or Grails.

Nevertheless, I think it is the best choice for a server-side web framework if you have to realize a really huge web application with many developers (besides CRUD). The productivity of Spring Roo is awesome - but only for the initial startup of a web application (see my blog "When to use Spring Roo and when NOT to use it": http://www.kai-waehner.de/blog/2011/04/05/when-to-use-spring-roo/).

I listened to your web framework comparison at Java Symposium 2011 in Las Vegas some months ago (I especially liked your presentation style) and in my opinion JSF is not as bad as you make it :-) Nevertheless, I want to mention that things like TDD with JSFUnit is everything else, but NOT productive! It is a lot of effort...

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

BTW: I also had problems with the lights in my Jazoon talk on Tuesday about Apache Camel. Besides, the cinema environment is awesome for such a conference!

Securing Your Java Applications

May 21, 2011 · Jeyaseelan

@Mark: You are right! I was not aware that e.g. WebLogic or WebSphere MQ also offer Multicast support. Although I think that Tibco RV is most widespread for multicast solutions, I changed the title and some content to make this clear. Thanks for your feedback.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Securing Your Java Applications

May 21, 2011 · Jeyaseelan

@Mark: You are right! I was not aware that e.g. WebLogic or WebSphere MQ also offer Multicast support. Although I think that Tibco RV is most widespread for multicast solutions, I changed the title and some content to make this clear. Thanks for your feedback.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Securing Your Java Applications

May 21, 2011 · Jeyaseelan

@Mark: You are right! I was not aware that e.g. WebLogic or WebSphere MQ also offer Multicast support. Although I think that Tibco RV is most widespread for multicast solutions, I changed the title and some content to make this clear. Thanks for your feedback.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Securing Your Java Applications

May 21, 2011 · Jeyaseelan

@Mark: You are right! I was not aware that e.g. WebLogic or WebSphere MQ also offer Multicast support. Although I think that Tibco RV is most widespread for multicast solutions, I changed the title and some content to make this clear. Thanks for your feedback.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Securing Your Java Applications

May 20, 2011 · Jeyaseelan

For the point of "slow performance with certified messages", I can only talk about the experiences our architects made when evaluating several JMS implementations (including Websphere MQ and some open source products) and Tibco RV about 3 years ago for their project: Certified Tibco messages were much slower than not certified ones. But honestly, unreliable messaging was very acceptable for our use case, so maybe they did not evaluate Certified Tibco messaging a lot...

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Securing Your Java Applications

May 20, 2011 · Jeyaseelan

For the point of "slow performance with certified messages", I can only talk about the experiences our architects made when evaluating several JMS implementations (including Websphere MQ and some open source products) and Tibco RV about 3 years ago for their project: Certified Tibco messages were much slower than not certified ones. But honestly, unreliable messaging was very acceptable for our use case, so maybe they did not evaluate Certified Tibco messaging a lot...

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Securing Your Java Applications

May 20, 2011 · Jeyaseelan

For the point of "slow performance with certified messages", I can only talk about the experiences our architects made when evaluating several JMS implementations (including Websphere MQ and some open source products) and Tibco RV about 3 years ago for their project: Certified Tibco messages were much slower than not certified ones. But honestly, unreliable messaging was very acceptable for our use case, so maybe they did not evaluate Certified Tibco messaging a lot...

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Securing Your Java Applications

May 20, 2011 · Jeyaseelan

For the point of "slow performance with certified messages", I can only talk about the experiences our architects made when evaluating several JMS implementations (including Websphere MQ and some open source products) and Tibco RV about 3 years ago for their project: Certified Tibco messages were much slower than not certified ones. But honestly, unreliable messaging was very acceptable for our use case, so maybe they did not evaluate Certified Tibco messaging a lot...

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Securing Your Java Applications

May 20, 2011 · Jeyaseelan

Hm, it is definitely not! If you can tell me some other good middleware for multicast messaging, I will immediately add them to this article...

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Open Source Integration With Apache Camel and How Fuse IDE Can Help

May 19, 2011 · mitchp

Hey Jonathan, this article is a good overview about Apache Camel. I can confirm that all promises about easier integration are true (because you always use the same DSL). I already tried out the BETA of Fuse IDE and wonder if there are plans for supporting Java DSL in the future? Yes, I am one of the guys, who does not like too much XML configuration :-) Best regards, Kai Wähner (Twitter: @KaiWaehner)
Introduction to Abject-Oriented Programming

Apr 10, 2011 · Greg Jorgensen

Hey Shekhar,

good article. But did you also realize some relationships between entities? I think "OneToMany" and so on do not work with GAE?

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Creating Application using Spring Roo and Deploying on Google App Engine

Apr 10, 2011 · Shekhar Gulati

Hey Shekhar,

good article. But did you also realize some relationships between entities? I think "OneToMany" and so on do not work with GAE?

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Erlang and it's "99.9999999 % uptime" (continued)

Apr 08, 2011 · Gerd Storm

Hey Dean,

the intention of this article is not to explain what Spring Roo is!

In a nutshell: It is a development infrastructure, a collection of tools, frameworks and libraries to ease Java development (not just web development).

You might look at this very good article series to get a quick understanding of Spring Roo:

http://www.ibm.com/developerworks/opensource/library/os-springroo1/index.html

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Erlang and it's "99.9999999 % uptime" (continued)

Apr 08, 2011 · Gerd Storm

Hey Dean,

the intention of this article is not to explain what Spring Roo is!

In a nutshell: It is a development infrastructure, a collection of tools, frameworks and libraries to ease Java development (not just web development).

You might look at this very good article series to get a quick understanding of Spring Roo:

http://www.ibm.com/developerworks/opensource/library/os-springroo1/index.html

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Erlang and it's "99.9999999 % uptime" (continued)

Apr 08, 2011 · Gerd Storm

Hey Dean,

the intention of this article is not to explain what Spring Roo is!

In a nutshell: It is a development infrastructure, a collection of tools, frameworks and libraries to ease Java development (not just web development).

You might look at this very good article series to get a quick understanding of Spring Roo:

http://www.ibm.com/developerworks/opensource/library/os-springroo1/index.html

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Erlang and it's "99.9999999 % uptime" (continued)

Apr 08, 2011 · Gerd Storm

Hey Andrew,

I agree 100 percent, IF you want to create a Spring application.

But if you want to create something else, you should not use Spring Roo in my opinion. It falls down when you have to realize more than just CRUD. Of course, you can customize everything by yourself. Actually, you even still have the possiblity to use e.g. the “finder”-feature of Roo to create finders.

Nevertheless, if you have to create a lot of stuff besides CRUD, you are mixed in between “what to do with Roo” and “what to do without Roo”. You can also get stuff out of AspectJ into your Java code. Thus, governance and maintainability is much more complex if you use Roo for some stuff and no Roo for other stuff.

Try out e.g. GWT with Roo. If you create a CRUD application with 5 entities and relationships, you get about 200 (or maybe only 50 classes, but toooo many!). That is fine if you just need CRUD, but if you want to customize some masks, it is no fun and time-consuming.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Erlang and it's "99.9999999 % uptime" (continued)

Apr 08, 2011 · Gerd Storm

Hey Andrew,

I agree 100 percent, IF you want to create a Spring application.

But if you want to create something else, you should not use Spring Roo in my opinion. It falls down when you have to realize more than just CRUD. Of course, you can customize everything by yourself. Actually, you even still have the possiblity to use e.g. the “finder”-feature of Roo to create finders.

Nevertheless, if you have to create a lot of stuff besides CRUD, you are mixed in between “what to do with Roo” and “what to do without Roo”. You can also get stuff out of AspectJ into your Java code. Thus, governance and maintainability is much more complex if you use Roo for some stuff and no Roo for other stuff.

Try out e.g. GWT with Roo. If you create a CRUD application with 5 entities and relationships, you get about 200 (or maybe only 50 classes, but toooo many!). That is fine if you just need CRUD, but if you want to customize some masks, it is no fun and time-consuming.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Erlang and it's "99.9999999 % uptime" (continued)

Apr 08, 2011 · Gerd Storm

Hey Andrew,

I agree 100 percent, IF you want to create a Spring application.

But if you want to create something else, you should not use Spring Roo in my opinion. It falls down when you have to realize more than just CRUD. Of course, you can customize everything by yourself. Actually, you even still have the possiblity to use e.g. the “finder”-feature of Roo to create finders.

Nevertheless, if you have to create a lot of stuff besides CRUD, you are mixed in between “what to do with Roo” and “what to do without Roo”. You can also get stuff out of AspectJ into your Java code. Thus, governance and maintainability is much more complex if you use Roo for some stuff and no Roo for other stuff.

Try out e.g. GWT with Roo. If you create a CRUD application with 5 entities and relationships, you get about 200 (or maybe only 50 classes, but toooo many!). That is fine if you just need CRUD, but if you want to customize some masks, it is no fun and time-consuming.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

160+ RSS Tools, Tips, Resources and More

Feb 02, 2011 · Steven Snell

Meanwhile, Smart GWT 2.4 (LGPL and EE) is available. Besides some very good new features such as offline capability or some more powerful components, the quick start guide is much more extensive than some months ago. I really appreciate that!

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

PHPRPC and PHP frameworks

Feb 01, 2011 · Stefan Koopmanschap

Great article, Nicolas!

I like it to use Scala with an existing Java web framework. On the other hand, I do not like some concepts of Lift that much. Your example looks like it really eases development with Vaadin (given that you already know Scala). Thus, I hope to read more experiences from you...

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Working with cookies in Struts 2

Jan 24, 2011 · Omkar Patil

I just tried out the newest release 2.5 (stable).

Now, an installer and very good configuration support is available. You do no more have to install JRebel manually. Great work of ZeroTurnaround!

Apache Camel: Integration Nirvana

Jan 04, 2011 · Jonathan Anstey

Very nice introduction to Apache Camel! Thank you.
Longest Type Name in .NET?

Dec 28, 2010 · Tony Thomas

The disadvantages are very crucial for Java developers. But if you really need to build a RIA, there is no alternative to Flex at the moment (because the old JavaFX of 2010 has too many disadvantages, e.g. bad IDE support, just basic widgets, also a new programming language).

I hope that the new JavaFX of 2011 will solve this problem. It has much potential for Java developers (Java language, thus also good IDE support), but maybe it is too late... I think, if the new JavaFX will have good widgets, it has a chance!

At the moment, I (as Java developer) would use other Web-Frameworks such as JSF or GWT wherever possible, but if the requirements demand be a "real" RIA, you have to use Flex.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

Working with cookies in Struts 2

Dec 28, 2010 · Omkar Patil

Sure. This is no criticism to Adam's article! I just thought it is a good introduction to my article :-)
Working with cookies in Struts 2

Dec 28, 2010 · Omkar Patil

Sure. This is no criticism to Adam's article! I just thought it is a good introduction to my article :-)
Working with cookies in Struts 2

Dec 28, 2010 · Omkar Patil

Sure. This is no criticism to Adam's article! I just thought it is a good introduction to my article :-)
160+ RSS Tools, Tips, Resources and More

Dec 15, 2010 · Steven Snell

@Charles:

I agree with you, that the "I perspective" is missing in this part! I do not want to damage anyone. So I also changed this part a little bit to make clear, that this is MY personal experience.

Probably, I still would use plain Hibernate and GWT RPC next time instead of the server-side integration of SmartGWT.

But there is no question that you can also build good, complex enterprise web applications with SmartGWT - of course you can! If someone wants to use SmartGWT server-side, the support must be bought, too (in my opinion).

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

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Dec 15, 2010 · Steven Snell

@Charles:

I agree with you, that the "I perspective" is missing in this part! I do not want to damage anyone. So I also changed this part a little bit to make clear, that this is MY personal experience.

Probably, I still would use plain Hibernate and GWT RPC next time instead of the server-side integration of SmartGWT.

But there is no question that you can also build good, complex enterprise web applications with SmartGWT - of course you can! If someone wants to use SmartGWT server-side, the support must be bought, too (in my opinion).

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

160+ RSS Tools, Tips, Resources and More

Dec 15, 2010 · Steven Snell

@Charles:

I agree with you, that the "I perspective" is missing in this part! I do not want to damage anyone. So I also changed this part a little bit to make clear, that this is MY personal experience.

Probably, I still would use plain Hibernate and GWT RPC next time instead of the server-side integration of SmartGWT.

But there is no question that you can also build good, complex enterprise web applications with SmartGWT - of course you can! If someone wants to use SmartGWT server-side, the support must be bought, too (in my opinion).

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

160+ RSS Tools, Tips, Resources and More

Dec 14, 2010 · Steven Snell

@Charles:

Thanks for your extensive comments. I do not disagree with a lot of your post, but remember: This is our experience! Some things you posted may be true, e.g. this one:

[quote] Have to really emphasize this: this is absolutely, 100% percent completely false. The fact that you ended up writing some kind of "mapping files" suggests that you badly misunderstood how the product is meant to be used and did something unnecessary. [/quote]

Yes. Maybe you are right! Maybe I did not understand some part of the product.

But the problems we had to solve were not in any tutorial or guide (by the way: I am not the guy who posted most of our problems in the forum). And the forum support could not help us with some of these problems. So maybe you can do this without mapping files, that is great! But unfortunatelly we could not make it, also if it may be possible!

So again: this is my experience with the product after one and a half persons worked some months with it (WITHOUT training or commercial support). I do not want to make things bad if they are not, I just wanted to report MY experiences! To make this more clear, I will add this information to the beginning of the article!

Next time, if we have to decide to use the server-side integration of SmartGWT, we would probably decide against it or also buy support, because in my opinion it is absolutely necessary to use SmartGWT successfully.

Unit Testing Silverlight with Selenium

Dec 14, 2010 · Mr B Loid

Unfortunately, we still have huge J2EE projects with EJB 2.1 and WebSphere AS 6.1. It is horrible! But because each new CR takes just some days, I am not sure if they will ever let us migrate it to at least JEE 5.

In my opinion, worse than the EJB 2.1 technology is the architecture. Countless interfaces everywhere (and I do not mean the EJB interfaces)! I think, there is almost an interface for EVERY class - no joke!

Everything is generic - and that deduces very awful, hard readable code. Theoretically, you could change every little bit of this X million dollar project. Of course, never ever anyone of the components was replaced :-)

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

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Dec 13, 2010 · Steven Snell

I can only report from our project.

We use some tables with thousands of data entries (with live-scrolling). We use Buttons and Dropdown Boxes to Open new Windows. These windows also load data form the DB to manipulate them (CRUD). The new windows are loaded within some milliseconds. New data is auto-refreshed. If we store data, it shows up in the GUI instantly.

It is not that complex GUI! And it works really fine. Maybe there would be performance issues with huge or complex GUIs, but for us the performance is good and sufficient!

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

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Dec 13, 2010 · Steven Snell

I can only report from our project.

We use some tables with thousands of data entries (with live-scrolling). We use Buttons and Dropdown Boxes to Open new Windows. These windows also load data form the DB to manipulate them (CRUD). The new windows are loaded within some milliseconds. New data is auto-refreshed. If we store data, it shows up in the GUI instantly.

It is not that complex GUI! And it works really fine. Maybe there would be performance issues with huge or complex GUIs, but for us the performance is good and sufficient!

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

160+ RSS Tools, Tips, Resources and More

Dec 13, 2010 · Steven Snell

I can only report from our project.

We use some tables with thousands of data entries (with live-scrolling). We use Buttons and Dropdown Boxes to Open new Windows. These windows also load data form the DB to manipulate them (CRUD). The new windows are loaded within some milliseconds. New data is auto-refreshed. If we store data, it shows up in the GUI instantly.

It is not that complex GUI! And it works really fine. Maybe there would be performance issues with huge or complex GUIs, but for us the performance is good and sufficient!

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

160+ RSS Tools, Tips, Resources and More

Dec 13, 2010 · Steven Snell

[quote]I have even been able to successfully integrate gwt-platform's MVP pattern with it.[/quote]

We also used the MVP pattern. I can recommend it to everybody! Also, since version 2.1 the MVP pattern is integrated in GWT.

[quote]the interoperability between SmartGWT widgets and regular GWT widgets is horrible[/quote]

That is true. But because every GWT widget is also available as SmartGWT widget, that is no problem, isn't it? So you do not have to combine both.

Best regards,

Kai Wähner (Twitter: @KaiWaehner)

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Dec 13, 2010 · Steven Snell

@Dejan:

I added one PRO i forgot! Please read it again. We had no performance problems. The GWT development mode worked without any problems.

And we also used some GWT-RPC calls to call some EJBs (but we do NOT use JSNI / handwritten JavaScript at all).

@Aleksandar:

I also like Vaadin. I think it is a great alternative if you want to realize a server-centric web application.

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