JBoss Drools Business Rules

Paul Browne

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What, you’re still here? Well if it takes a bit more to convince you to buy it, here’s the info on the Business Rules and Workflow book direct from the publishers (Packt) own site. If you can’t wait, and want to dive right in, the code samples from the book are available on the Red Piranha 2 website.

JBoss Drools Business Rules Paul Browne Capture, automate, and reuse your business processes in a clear English language that your computer can understand. An easy-to-understand JBoss Drools business rules tutorial for non-programmers Automate your business processes such as order processing, supply management, staff activity, and more Prototype, test, and implement workflows by themselves using business rules that are simple statements written in an English-like language Discover advanced features of Drools to write clear business rules that execute quickly For confident users of Excel or other business software, this book is everything you need to learn JBoss Drools business rules and successfully automate your business. In More Detail Code download Request a Review Copy Send us feedback on this title Ask a question about this title Sample Chapter 4 Guided Rules with the Guvnor [2.0 MB] Table of Contents Book Details Language English Paperback 305 pages [191mm x 235mm] Release date April 2009 ISBN 1847196063 ISBN 13 978-1-847196-06-4 Author(s) Paul Browne Topics and Technologies Open Source, Java A comprehensive, practical guide for business analysts and non-programmers to harnessing JBoss Drools Business Rules in your organization In Detail In business, a lot of actions are trigged by rules: “Order more ice cream when the stock is below 100 units and temperature is above 25° C”, “Approve credit card application when the credit background check is OK, past relationship with the customer is profitable, and identity is confirmed”, and so on. Traditional computer programming languages make it difficult to translate this “natural language” into a software program. But JBoss Rules (also known as Drools) enables anybody with basic IT skills and an understanding of the business to turn statements such as these into running computer code. This book will teach you to specify business rules using JBoss Drools, and then put them into action in your business. You will be able to create rules that trigger actions and decisions, based on data that comes from a variety of sources and departments right across your business. Regardless of the size of your business, you can make your processes more effective and manageable by adopting JBoss Rules. Banks use business rules to process your mortgage (home loan) application, and to manage the process through each step (initial indication of amount available, actual application, approval of the total according to strict rules regarding the amount of income, house value, previous repayment record, swapping title deeds, and so on). Countries such as Australia apply business rules to visa applications (when you want to go and live there)—you get points for your age, whether you have a degree or masters, your occupation, any family members in the country, and a variety of other factors. Supermarkets apply business rules to what stock they should have on their shelves and where—this depends upon analyzing factors such as how much shelf space there is, what location the supermarket is in, what people have bought the week before, the weather forecast for next week (for example, ice cream in hot weather), and what discounts the manufacturers are giving. This book shows how you can use similar rules and processes in your business or organization. It begins with a detailed, clear explanation of business rules and how JBoss Rules supports them. You will then see how to install and get to grips with the essential software required to use JBoss Rules. Once you have mastered the basic tools, you will learn how to build practical and effective of the business rule systems. The book provides clear explanations of business rule jargon. You will learn how to work with Decision Tables, Domain-Specifi c Languages (DSL)s, the Guvnor and JBoss Integrated Development Environment (IDE), workflow and much more. By the end of the book you will know exactly how to harness the power of JBoss Rules in your business. Read the full Table of Contents for JBoss Drools Business Rules What you will learn from this book Understand the basics of business rules and JBoss rules with minimal effort Install the required software easily and learn to use the Guvnor, which is a user-friendly web editor that’s also powerful enough to test our rules as we write them Learn to write sophisticated rules and import the fact model into the Guvnor and then build a guided rule around it, which makes your web pages a lot clearer Gain complete knowledge of what we can do with the Guvnor rule editor, and then use the JBoss IDE as an even more powerful way of writing rules, and automate processes for discounts, orders, sales, and more Know the structure of the rule file through the example of a shipping schedule, which will help you with your own shipping schedule Test your rules not only in the Guvnor, but also using FIT for rule testing against requirements documents; run unit tests using JUnit for error-free rules and interruption-free services Specifically, non-developers can work with Excel spreadsheets as a fact model to develop business processes without learning any other new technology Work with DSLs (Domain-Specific Languages) and rule flow to make writing rules easy; which makes staff training quicker and your working life easier Deploy your business rules to the real world, which completes your project successfully, and combine this into a web project using the framework of your choice to provide better services Benefit from concepts such as truth maintenance, conflict resolution, pattern matching rules agenda, and the Rete algorithm to provide advanced and faster business systems so that staff efficiency is maximized Chapter 1, Drooling over JBoss Rules. This chapter gives you a good platform to understand business rules and JBoss rules. We look at the problems that you might have (and why you’re probably reading this book). We look at what business rule engines are, and how they evaluate business rules that appear very simple and how they become powerful when multiple rules are combined. Chapter 2, Getting the software, deals with installation. This chapter explains setting up Java, setting up Business Rule Management System (BRMS)/Guvnor running on the JBoss App Server, setting up Eclipse, and installing the Drools Plug-in. It also details the installation of the Drools examples for this book and the Maven to build them. Chapter 3, Meet the Guvnor, deals with writing our rules using the ‘Guvnor’. Guvnor is the user-friendly web editor that’s also powerful enough to test our rules as we write them. We take up an example to make things easier. Then we look at the various Guvnor screens, and see that it can not only write rules (using both guided and advanced editors), but that it can also organize rules and other assets in packages, and also allow us to test and deploy those packages. Finally, we write our very first business rule—the traditional ‘Hello World’ message announcing to everyone that we are now business rule authors. Chapter 4, Guided Rules with the Guvnor. This chapter shows how to use the Guvnor rule editor to write some more sophisticated rules. It also shows how to get information in and out of our rules, and demonstrates how to create the fact model needed to do this. We import our new fact model into the Guvnor and then build a guided rule around it. Finally we test our rule as a way of making sure that it runs correctly. Chapter 5, From Guvnor to JBoss IDE. This chapter pushes the boundries of what we can do with the Guvnor rule editor, and then brings in the JBoss IDE as an even more powerful way of writing rules. We start by using variables in our rules example. Then we discuss rule attributes (such as salience) to stop our rules from making changes that cause them to fi re again and again. After testing this successfully, we look at text-based rules, in both the Guvnor and the JBoss IDE, for running ‘Hello World’ in the new environment. Chapter 6, More Rules in the jBoss IDE. This chapter looks again at the structure of a rule fi le. At the end of this chapter, we look at some more advanced rules that we can write and run in the IDE. Chapter 7, Testing your Rules. This chapter explains how testing is not a standalone activity, but part of an ongoing cycle. In this chapter we see how to test our rules, not only in the Guvnor, but also using FIT for rule testing against requirements documents. This chapter also explains Unit Testing using JUnit. Chapter 8, Data in Excel, Rules in Excel. This chapter explains how to use Excel Spreadsheets (cells and ranges) as our fact model to hold information, instead of the write-your-own-JavaBean approach we took earlier. Then we use Excel spreadsheets to hold Decision tables, to make repetitive rules easier to write. Chapter 9, Domain-Specific Languages [DSL] and rule flow. This chapter aims to make our rules both easier to use, and more powerful. We start with DSLs—Domain-Specifi c Languages. This chapter follows on from the ‘easy to write rules’ theme from the previous chapter and also discusses both ruleflow and workflow. It would be great to draw a workfl ow diagram to see/control what (groups of) rules should fi re and when. Rule flow gives us this sort of control. Chapter 10, Deploying rules in real life. This chapter shows you how to deploy your business rules into the real world. We look at the pieces that make up an entire web application, and where rules fit into it. We see the various options to deploy rules as part of our application, and the team involved in doing so. Once they are deployed, we look at the code that would load and run the rules—both home-grown and using the standard RuleAgent. Finally we see how to combine this into a web project using the framework of your choice. Chapter 11, Peeking under the covers. This chapter looks at what happens under the cover by opening up the internals of the Drools rule engine to understand concepts such as truth maintenance, confl ict resolution, pattern matching, and the rules agenda. In this chapter, we explore the Rete algorithm and discuss why it makes rules run faster than most comparable business logic. Finally we see the working memory audit log and the rules debug capabilities of the Drools IDE. Chapter 12, Other Drools features. This chapter deals with the other advanced Drools features that have not yet been covered. This includes Smooks to bulk load data, Complex Event Processing, and Drools solver to provide solutions where traditional techniques would take too long. Approach This book takes a practical approach, with step-by-step instructions. It doesn’t hesitate to talk about the technologies, but takes time to explain them (to an Excel power-user level). There is a good use of graphics and code where necessary. Who this book is written for If you are a business analyst – somebody involved with enterprise IT but at a high level, understanding problems and planning solutions, rather than coding in-depth implementations – then this book is for you. If you are a business user who needs to write rules, or a technical person who needs to support rules, this book is for you. If you are looking for an introduction to rule engine technology, this book will satisfy your needs. If you are a business user and want to write rules using Guvnor/JBoss IDE, this book will be suitable for you. This book will also suit your need if you are a business user and want to understand what Drools can do and how it works, but would rather leave the implementation to a developer. Author(s) Paul Browne Paul Browne’s first job was selling computers in France and things went steadily downhill from there. He spent millons on behalf of a UK telephone company’s procurement department and implemented direct marketing for a well-known Texan computer maker before joining the IT department of a company that builds bright red tractors and other seriously cool machines. Paul then embraced his techie side (he was writing games in machine code from the age of 11) and started a consultancy that used IT to solve business problems for companies in the financial and public sectors in Ireland, UK , Belgium, and New Zealand. Eight years later, he now works with an Irish government agency that helps similar software companies to grow past their initial teething pains. More formally, Paul has a bachelor’s degree in Business and French from the University of Ulster, a master’s degree in Advanced Software from UCD Dublin, a post-grad qualification in Procurement from the Chartered Institute of Procurement and Supply (UK), and will someday complete his ACCA financial exams. Paul can be found on LinkedIn at http://www.linkedin.com/in/paulbrowne , and via the Red Piranha (Business knowledge) project at http://code.google.com/p/red-piranha/ .

BizCamp is an opportunity for entrepreneurs and innovators to come together, share experiences, and possibly create new value out of the day. It’ll be a chance to meet up with people who’ve been there, done that and bought the t-shirt – members of the business community, VCs and investors, and representatives from the relevant state agencies. Lost your job or finding current market conditions tough? Come along to BizCamp, who knows what new opportunities might turn up?

People tend to associate *Camps with the Web and the tech start-ups, but our aim is to try and embrace as much of the Irish business community as possible. We want to see people from all streams – finance, operations, HR, legal, delivery specialists, R&D, marketing – and yes, even tech! Ireland Inc. has a wealth of knowledge and acumen, more than enough to help us out of these troubled times. By attending (and, more importantly, contributing!) you can help make BizCamp the first “good news story” of the recession.

A full list of people already signed up to attend is available at

http://www.bizcamp.ie/whos-attending/

Eircom, Bank of Ireland and other key digital companies will be sponsoring the event. The Bizcamp is being organised by a number of entrepreneurs who have businesses in the Leinster region, along with people active in the web from business and public sectors.

While most of the speaking slots are informal we are looking key business speakers for two panels on the day; Speakers should be recognizable figures, all with a good story to share. Suggested panel topics are raising funding and supports available for your business. A list of people already speaking at the event is online at http://www.bizcamp.ie/2009/01/speakers-sessions/

Aside from the business networking available at the event, Speakers will have an opportunity to promote themselves and their business in a friendly Q&A type session. If you think you’d have something to contribute to the panel,  please contact me (Paul) via the comment form on this blog.

Now, I’ve been known to follow previous Government advice and ‘shop around’ for the best value (including at the Quays in Newry). However, if everybody follows this ‘me first’ approach we’ll be quickly in a race to be first to leave the sinking ship. But what if, instead of cutting and running, we stayed to plug the leaks in the Irish economy and kept it afloat?

The trouble in staying to plug the leaks is that this requires consensus that everybody helps out– and consensus is in short supply at the moment. All groups in Irish society are fighting to shift the inevitable pain of the recession on to somebody else. The lack of consensus is worsened by the fact that those who did well in the boom, and those seen to be responsible for the bust, are not necessarily those that are feeling the most pain right now. Without consensus, you’ll be left alone with your bailer as the water closes over your head.

Unfortunately the site does not work with non IE Web browsers (such as Mozilla Firefox or Google Chrome). That means about 1/4 of the people wishing to donate are being locked out.

Normally at this point I’d rant about whatever corporate decision maker let this one through. But I’m just sad - a deserving charity, always stretched for cash,  is 25% down due to some simple (JavaScript) errors.

I’ve emailed the address given, but I’m likely to viewed as some random web lunatic (and maybe that’s not far from the truth). So what can I do to help? All suggestions welcome.

Update: I got a fairly quick email back from SVP acknowledging the problem - better than many commercial organisations in that regard. But the question remains - how can somebody with technical skills volunteer to help a charity without coming across as a nutcase?

Update 2: A further update from SVP within 10 days - test the site again - appears to work normally.

• Even if the vote doesn’t go the way of the experts, the Judges get to save one option for the next week.
• We get to vote every week on more or less the same topic.
• People pay to cast their vote by premium text line, SMS or Website. 

The X-Factor is incredibly popular in the UK , so there must be something to it. What do you think - Is fact stranger than fiction?

Here’s the 2 minute overview of Securing a multi-tenant SAAS Appliction, just published on IBM Developerworks.

1. Software as a Service (SAAS) has a great pitch - let us host your software for you, cheaper and less hassle than managing it yourself.
2. Most SAAS companies host multiple clients on one server = New security concerns.
3. LDAP (Similar to Windows Directory) is a standard already in wide use for Authentication (making sure people who they say they are).
4. Spring Security (aka Acegi) is a well used Authorisation toolkit - i.e. make sure those people only do things they are allowed to do.
5. The article shows you how to bring SAAS , LDAP and Spring Security together to get secure, scalable , hosted applications using the very best in widely understood technologies.

Of course, I’m not going to spill the beans on how exactly they do it; for that you’re going to have to hotfoot it over to the IBM Developerworks website.

No, I’ve not found some ‘back door’ to allow us to take part, but the Economist is running an online poll to find out what would happen if the US President was choosen by worldwide vote.

Hmm … looks like Obama is leading 8,375 to 15. Those 15 come from Georgia (wondered what happened there recently) and Macedonia (next door to Kosovo with large scale Nato intervention).

Life’s unfair with McCain getting tarred with the legacy of 8 years of Bush. Especially after what happened him in the 2000 election (South Carolina Primary) where Bush hit him with some very low attack ads alleging that McCains wife had an affair (in reality, the couple have a daughter adopted from overseas).

Warning: This blog has a 100% failure rate when it comes to forecasting politics.

Our claim to fame is that FirstPartners.net went through this program in 2003. And failed. But failed quickly - we realised within months that the mad business idea (selling open source technology to accountants) wasn’t going anywhere. We were able to bring the lessons learned back into the main consulting business. Far better than a lingering , drawn out half-life.

More information is here (pdf format)

Enterprise Platform Programme
Enterprise Support for Innovative Knowledge based, High Tech and Information Technology Startups

Introduction
The Novation Enterprise Platform Programme (NEPP) is a programme of  support for graduate entrepreneurs with an innovative business idea in the Knowledge Based, High Tech or IT sectors.

The main objective of the programme is to develop the commercial and job creation potential of the participant businesses. The programme delivers comprehensive training in business and management to equip participants to successfully start up and manage a new business. The
programme assists participants in the achievement of personal and business development goals in relation to the project. It also assists participants in the completion of market or technical feasibility studies and/or the preparation of a business plan.

Past Participants
Since its conception in 2001, over 70 entrepreneurs have participated on the Programme. A survey conducted recently confirmed that over 54 businesses have been established by NEPP participants resulting in total employment of 311 people and sales of €27million per annum.
Participants have also raised over €39 million in VC funds.

 The programme will be managed by the Regional Development Centre, on the campus of Dundalk Institute of Technology. Participants may choose to be based in the professional, entrepreneurial environment of the Regional Development Centre, and will have access to the laboratories, equipment and resources of Dundalk Institute of Technology.

Eligible participants receive a consultancy / travel allowance of approximately €1150. Eligible participants may also apply for funding through Enterprise Ireland’s Commercialisation of Research and Development (CORD) grants, whereby they can receive up to 50% of their previous year’s verifiable income (the grant in total will be capped at a maximum of €38,000).

The Novation EPP is a comprehensive package of business development
support including:

• Project management and on-going monitoring of progress
• Travel / consultancy allowance
• Structured business and enterprise training to develop the knowledge and skills necessary to start-up your own business.
• Networking with entrepreneurs, industry practitioners, researchers and trainers. 
• Access to office space and specialist facilities, equipment and resources.
• Mentoring system which provides one-to-one advice and guidance
• Business Coaching which aims to optimise participants’ business performance
• The programme will commence in Sept. 2008 and there will be regular formal reviews of participants’ progress.
• Prize Fund. The 2008/09 programme introduces a prize fund for participants. Eligible businesses will be judged on a variety of criteria including best improvement, degree of innovation, presentation before a panel and performance at end of year tradeshow.

Java@cork 2008

Tuesday, September 9, Radisson SAS Hotel, Little Island, Cork
Featuring speakers from SpringSource, Sun Microsystems, Eclipse Foundation and much more…

Agenda

• OSGI and the Enterprise Ben Hale, SpringSource
• Lucene - Open Source Search Engine - Case Study, Phil Corcoran, RR Donnelley
• Eclipse Verticals - From Open Source Consumption to Creation , Ralph Mueller, Director, Eclipse Foundation
• Leveraging Eclipse For Desktop Applications - Case Study, James Sugrue, Pilz Ireland
• Demo of Spring plugin tools for Eclipse, Jonas Partner, SpringSource
• Spring Integration, Jonas Partner, SpringSource
• SOA In Practice, Oisin Hurley, Iona Technologies
• The Future of Java for Rich Internet Applications, Simon Ritter, Sun Microsystems

Fee: €80pp for members. €130pp for non members. Students fee is €40.
Registration: email admin@itcork.ie or visit www.itcork.ie

A tractor in a field yesterday

Many years ago, I used to work for Case, the company that builds big red tractors. It was great work, especially as people understood what you did - none of this ‘I work in computers’ malarchy. Only problem was that we were working in Navan Ireland, with most of our colleagues based in Racine, just north of Chicago.

Not too much of a problem for the first 15 or so people - people who worked out of Chicago for the first 4 or 5 months. We were able to build up personal relationships with a colleagues. We could ask later ‘how are the kids?’ or ‘are you still playing football?’. Small things, but make the real work discussions a lot easier.

The problem came with employees 15-100 - the ones that didn’t spend any amount of time in the US. Technically great people, but didn’t ‘click’ in the same way with Chicago. As a result, small misunderstandings became big misunderstandings, and projects got delayed.

And that’s where corporate blogging comes in. It allows people in far flung offices to connect. Doesn’t matter what you blog about - personal life, or some small project that’s happening in your local office. Chances are somebody else in the company will pick up on it and vital connections will be made.

And if you’re in the market for a big red tractor, click on the photo above. 125 BHP, Diesel Engine, a bargain at 16,500 Euro.

Girl 1: I can’t believe my car is only worth 15 thousand but the car loan is still 20. It’s so unfair.

Girl 2: What colour is it?

Girl 1: Red

Girl 2: That’s ok then.

And women are normally more careful with money. We’re all doomed.

1. Have a task / todo list. On Outlook , Excel , wiki or paper. Daily, pick off most important tasks and allocate time for them on your calendar.
2. Schedule your time in some sort of calendar. Use Outlook, Google Calendar , Mozilla Lightening or even a paper diary. Keep about 1/3rd free for the unexpected. Timeslots no shorter than 30 minutes; bunch smaller todo’s together to make up. Set your mail program to show first your calendar and not your email - that way your daily agenda is set by your plans, not somebody else.
3. Clear mail inbox twice a day (and only twice a day). Do same for phone calls (using voicemail) if that’s disrupting you too much. Only touch mails once: delete, respond, or make room on calendar / tasklist (action).

Adjust steps 1,2, and 3 as required. Get as fancy or as simple as you want.  Don’t aim for perfect, so you’ll be flexible enough when you need to change. Works for me. What works for you?

And yes, it’s probably already covered in ‘Getting things done‘.

There is one small change I’d like them to make - you have only the black or white option of either showing , or hiding your connections.

I think there should be a third option: ‘Show mine if you show me yours’. I’ve only met a handful of people that hide their connections; I’m still happy to connect to them - I typically scan my LinkedIn list when asked to recommend people. But there’s no incentive for them to open their list - they get a free ride no matter what they choose.

It may be co-incidence, but all of the people with hidden connections make their living from their professional network (e.g. recruiters, high end management consultants).

What do you think? Are these people being business savvy, or just parasites stealing our networking time?

The above picture is from the Irish Independent writeup on Toddle. And if you want to check out Alan’s mad-take-over-the-world-ideas , he blogs at PinStripe.

I’ll almost forgive him for being from ‘the faaaaaar soide’ - that’s the Meath side of Drogheda if you don’t follow our local tradition of ignoring people from the other side of the River Boyne.

So, it’s surprised the people I’ve told that I’m now going to be doing something completely different.

Why?
No it’s not the economy. I can see the effects of the slowdown but I’m one of the most ‘low maintenance’ people I know (anybody who lives in Drogheda and drives a ‘98 Toyota isn’t exactly into bling!) I’d be ok. And the uptick (in 18months - 2 years time) is the most profitable bit of the economic cycle.

No , it’s not through lack of clients. One of the most painful parts of the decision have been the 3 prospective projects that I’ve had to turn down. The sort of ideal projects that I’d working to land for the previous 2 years.

No, it’s not through lack of choices. Two other ‘life changing’ choices I had to turn down were to scale inside a well known consultancy, or specialise in one tool and go international (you know who you are guys, thanks for making the final decision so hard

So why then?
The basic reason is that I’m enjoying this now (as in big smile on Monday mornings), but can see that I might not be enjoying it in 3 years time. And chances like this one don’t come along every day. That, and I’m fascinated by the new area and people that these guys are working with.

And what you’re doing is?
This is a big change for me, so a bit nervous about it and will blog about the new job (and it is very much a job, rather than being self-employed) in due course. It will either be the very best, or very worst thing that I’ve done.

Luckily it’s still dealing with People and Technology so no need to change the blog title … and I’m still a techie at heart (in that I’ll play with the stuff even if I’m not paid to) so expect more in that area!

From Wordle (a beautiful Java Applet)

Yep, it’s just happened to me. Years working on the idea of the ‘Wisdom of Crowds’ (even prior to web 2.0 in the shape of Red-Piranha). Month’s working on a Masters Dissertation on applying Web 2 techniques to the Finance industry (pdf link). And somebody comes out and does it even better.

Not just better. But much much better.  The sort of better as in ‘If I had this earlier, I’d have just copied it and changed the words around a bit’. The book is available from Manning as ‘Collective Intelligence in Action‘. A free, first chapter (Understanding Collective Intelligence) is available here (pdf).

So what’s it about? We’ve all heard about the Wisdom of Crowds idea. But what if you need to actually implement it on your website? This book shows you how to (using both concepts and practical code, as well as the theory behind all of it that I was missing). It includes

• Intelligent, learning search, using Lucene.
• Extracting data from blogs using web-crawling.
• Executing Real time feedback on facebook-like sites.
• Scalable data-mining techniques to manage the torrent of information
• Making personalised recommendations based on all of the information.

Disclaimer:Manning provided me with a free review copy of the book - but no strings attached. And , maybe if I’m nice enough to the Author (Satnam), I can persuade him to talk about making millions using JBoss Drools and Complex Event processing in the book.

The best quote from the news report:

The driver of the Lexus declined to be interviewed.

For those of you that don’t understand the above line: It’s unusual for an island as small as Ireland to be blessed / cursed with an international border running through the middle. Bad for politics , good for shoppers as it’s much cheaper to travel from the southern part (in the Euro zone) to the northern bit (where they use Sterling) to save up to half on your weekly grocery bill.

Travel to Sainsbury’s supermarket in Newry on the last Saturday before Christmas and you’ll see something just short of a riot as southern punters fight over the last bottle of (cheap) beer. But they’ve never closed the door due to too many people before - which is what happened last Saturday evening. Even more unusual in that June / July are normally very quiet months for shopping in the North.

Now discuss (in less than 100 words): Did this happen because …

1. Irish people are fed up with rip off prices in Dublin and are finally voting with their feet?
2. There’s a lot of hidden pain out there - people with no money but desperate to ‘keep up appearances’?
3. Both of the above

Allthetopbananas.com shows not how to do it. Just be lazy and not bother to tell your website that Cork is not near Drogheda (for our non-Irish-based readers, they’re at opposite ends of the country, about a 4-5hr commute!).

Why should I bother to report to you that ‘Cork is not Drogheda’ if you haven’t done your basic research and looked at the map? Save your ‘wisdom of crowds’ stuff for items that you can’t find anywhere else.

Belfast hasn’t moved any further away from Dublin in the last 12 months, so I can safely recycle last year’s plug for the event.

For most people in Dublin , the Belfast Barcamp is nearer than the forthcoming Galway and Tipp events. It’s 2 hours by train from Dublin (with the venue pretty close to both the Central and Botanic rail stations) and about the same by Car , with Motorway for all but 15 miles of the journey.

How to combine (jBPM) Workflow and (Drools) Business Rules - here’s the summary. Slideset is available on this blogpost.

• Workflow (e.g. JBoss jBPM) is great - it allows you to take spaghetti code and draw it as a workflow diagram (flowchart) so that it can be reviewed by the business (the nice people who pay our wages). You then attach standard (Java) actions to these steps.
• Only problem is when you come to a decision node (the one circled in red below): How do you decide to go left or right (in the workflow)? Normally this is coded in Java - good for us, but hidden from those nice business people (which means that this is more room for errors-in-translation).
• Business Rules allow you to keep those decision making rules in Plain English: When something is true , then do this. That’s it. The rule engine does most of the hard work.
• Integrating Workflow and Rules is easy. Use JBoss Seam (link) or do it by hand (link). And it works on non-JBoss web / app servers such as Websphere, Oracle Application Server, Tomcat and Weblogic.
• Repeat x6 : Use workflow and rules. Use workflow and rules …

In a maybe related development, Tom Baeyens is now using strangely Rules-y like examples over on his workflow blog ….

I don’t normally talk about politics on this blog, but this one is important , so excuse me if I make a rare exception. For readers from outside of Ireland, we’re the only country that is holding a referendum vote on the Lisbon treaty next Thursday (12th), which changes how the European Union (EU) is going to go about it’s internal business.

Like a lot of Irish people I was initally going to vote ‘No‘, partly because of unhappiness with the current political and economic outlook. Also partly by the poor ‘Yes’ campaign - loads of posters with policiticans faces, but no reasons why I should cast my vote in favour.

There’s been no official explanation of the (incomprehensible) treaty text. But the guide on RTE’s website shows the treaty changes and gives clear explanations as to what the changes mean.

Why I’ve changed my mind to vote yes. And not because of the patronising ‘jobs jobs jobs’ or ‘laughing stock of Europe’ arguments. (For the record , I find the no campaigns scaremongering about neutrality / taxes / take-away-our-babies equally offensive). Here’s why

• Europe has been good for Ireland - and not just the free roads. A large part of the peace process happened because the EU removed the differences between Ireland and Britain. I remember stopping at the customs post on the (single lane) main road between Dundalk and Newry. Very different now , with the M1 Motorway crossing what was previously ‘bandit country’.
• Europe has been good to me personally. I’ve been able to work (visa free) in 3 other European countries. It’s allowed me to study (with the host government paying the fees) in two more. Very different from the alternative of being an undocumented worker in the US.
• This is not a ‘free’ protest vote. There are consequences to voting no (maybe big, maybe small, nobody can guess at this stage). We’re not teenagers any more; it’s a big decision and should be treated as such.
• Without Europe, we’re more or less just a region of the UK. Before we signed up to EMU (the prequel to the Euro) in the 70’s the Irish pound was tied one-to-one to UK sterling. All economic decisions were effectively made in London. We may have only a small voice at the big European table, but it’s better that what we had previously - no voice at all.

I still think there is a lot that could be better with the EU - despite the increase in the powers of the European Parliament, the EU isn’t (yet) democratic enough. It’s far from perfect. It’s messy. But that’s life, and previous generations of Irish people would love to have a choice like this.

But what pushed me over the edge to vote yes is the Spoofers guide to the Lisbon treaty. Read it. Then decide.

Speaking at the JBoss jBPM community day tomorrow and I’m nervous. I’m nervous because I’m standing up and talking to a group of people that really know their stuff about JBoss workflow. And talking about a project (JBoss Business rules) which has a friendly rivalry with it.

So here goes

1. Slides in Powerpoint emailed to myself (check)
2. Slides in PDF available online (check).
3. Slides in Open Office on laptop ready for presentation (check)

More details on the jBPM wiki if you’re interested in attending the event. Anybody give odds on the laptop bluescreen again (like what happened at the Irish Java Technologies Conference)? It’s not what happens, it’s how you deal with it.

The JBoss workflow guys are dream guests. They just asked for a couple of venue suggestions and they finally went for the Guinness Hopstore where Barcamp ran last year. Next thing we got was an email saying that the JBoss Workflow event was go. So for the benefit of people flying into Dublin, here’s the information we gave on where to stay and things to do if you’re making a weekend of it.

(More information on the event on Tom Baeyens Blog)

How to get there

Dublin is pretty well served by direct flights from Europe and the US. Aer Lingus and Ryanair are the two biggest airlines flying into Dublin - but there are plenty more (list at FlightMapping.com).

Things to do

• Tour of Guinness brewery and visit the Gravity bar (one of the highest in Dublin)
• Dublin Pub Tour and general social scene (it’s a coincidence that the first 2 items are drink related!)
• Tour of Scenic Wicklow Mountains and Glendalough
• Liffey River tour by boat
• Dublin Bus tour - including it’s Georgian buildings and coastline
• Newgrange - 2000 years older than the pyramids, in the stunning Boyne valley
• Windsurfing , Kayaking or Rock climbing in Viking Carlingford Fjord.
• Trinity College Dublin, 400 years old university , right in the city centre including the 1000 year old ‘Book of Kells’
• For the more curious , Belfast is 2hrs away by express train in Northern Ireland.
• Get lost in Phoneix Park, the worlds largest city centre park.

Places to Stay

I don’t tend to say in Dublin hotels too much (!) but the following I know are reasonably good value (and quiet / clean)

• 3 of the Jury’s Inn (Christchurch is just down the road from the event location, but the IFSC and Parnell Street are also good)
• Academy hotel is ok, if slightly more expensive , if you’re stuck.
• If you want an airport location (about 20 mins / 20 Euro Taxi from the city centre) the Premier Inn chain are pretty good.
• Hotel Isaacs is budget but decent , central and near the main bus / train stations.
• Morgan hotel is where the presenters were put up for the Dublin Java conference. Central but Slightly more pricey.

For people from the community, there’s also plenty of ‘budget’ backpacker type accommodation.

What are you missing? Apart from the crash test dummies (below), there’s loads of lego blocks, Swiss mountains, trains crashing through walls and a Kangaroo. (Spring, Geddit?). You might even learn something about Java along the way.

Agile Projects using the Spring Framework
Executive Briefing
Delivery: Public or In-house
Course Length: 0.5 days. Optional mentoring / follow up session if required by Client
Course Approach: Lecture, discussions
Level: Beginner / Intermediate

Course Description:

Spring, with good reason, is the most actively used framework in the Enterprise Java world today. The half- day briefing shows the problems that Spring can solve for your projects, core Spring concepts such as Inversion of Control and integration with existing Enterprise Java technologies for database access, messaging and web deployment. The briefing also shows how to use Spring to make your projects more agile, improving quality and reducing deployment time.

Course Objectives:

• Following completion of this course, students will be able to:
• Understand why Enterprise Java is the mostly widely used corporate technology, and how Spring both simplifies and improves this technology.
• Understand core Spring concepts such as Inversion of Control (IOC), configuration , deployment and testing.
• Describe how to integrate Spring with Enterprise Technologies such as Databases, Messaging and Web 2 frameworks.
• Understand how Spring can make your projects more agile and the benefits it brings to your organization
• Map out a plan of how to introduce the Spring framework to existing systems.

Course Syllabus:

Section 1: The Problems That Spring Solves

• Introduction
• Who are you? Who are we?
• What is Spring?
• What is (Enterprise) Java?
• The problems with Enterprise Java
• Why Enterprise Java is costing you money.
• The Deployment Scale
• Java Classes and Objects
• Just enough XML to get by
• Core Spring - Inversion of Control pattern
• Spring Configuration and my First Spring App
• Deployment via Web, Enterprise Java and Command line
• Spring on other platforms (.Net , Ruby and Groovy)
• Alternatives to Spring
• Spring and Java 5 – easier development
• Starting out – just a little Spring in your Step.

Section 2: Core Spring and Enterprise Spring Integration

• Spring Web Framework (MVC)
• Spring Web with Struts , JSF , XSLT , Tiles and GWT (Google Web Toolkit)
• Spring and Ajax in Web 2 Applications.
• Spring Webflow
• Spring and Databases (Hibernate and JDBC)
• Spring and Messaging (MQ and JMS)
• Spring Remoting and Web Services
• Aspect Orientated Programming (AOP)
• Transactions in Spring
• Appfuse – ready to roll Spring projects with Maven
• Administration of your Application using Spring and JMX
• Scheduling using Spring and Quartz
• Spring and Acegi Security

Section 3: Practical Spring - make your project more Agile

• The problems with IT Projects
• What is Agile
• Spectrum of Agility
• How Spring makes your project more agile (and your customer happy)
• Key Agile Practices
• Unit Testing with Spring
• Integration Testing
• Mock Objects
• Spring IDE
• Spring and Business Rules
• Spring and Workflow
• Alternative Spring configuration.
• Extending Spring to meet you (obscure) needs.
• What’s new in Spring 2.5 (and coming up for Spring 3)

Audience:

• Managers and Project Managers wishing to understand the benefits of adding Spring to their projects.
• Software developers needing an introduction to Java and the Spring Framework and integration with key Enterprise technologies.
• Support, Database , Web Designers and other IT professionals needing to interface with Spring and Enterprise Java systems.
• .Net developers wishing to understand the concepts behind the Spring.Net framework.

Related Courses:
Enterprise Java (Trigraph) and Agile Project Management (Trigraph)

Prerequisites:
Some high level exposure to the Java, .Net or other Object Orientated language would be beneficial but
not necessary.

My fellow Java Developers. Two years ago I wrote an article on ‘Web 2.0 and Enterprise Java - move over Struts‘ looking at what was likely to replace Struts 1 (then and now a de facto web standard). How did our predictions fare?

Remember that article (and this one) isn’t looking for technical best, but which is going to be a best investment of your time to learn (in a mercenary commercial sense). And if you’re deciding which to use in a project , which framework is going to be easiest to support in 5 or 10 years time?

Broadly speaking, the frameworks we talk about break into two types: those that treat the web as a set of pages, and those that treat the web as a set of components (think Visual Basic, Delphi or Oracle Forms act-a-likes).

So , what has changed in the last 2 years:

1. The rise of Spring. Not only has it gone mainstream, but the Spring MVC, Spring Webflow and Spring-JavaServerFaces are very powerful and widely used web frameworks. A sign of how things have changed is that for Sruts 1 the Spring guys wrote the integration for the (then) bigger Struts framework. For Struts 2 , the integration was provided by the Struts community. With the forthcoming Spring 3 release the framework is increasing momentum; More annotations and less XML in Spring MVC; Rest Web Services out of the box, support for Dynamic languages like Groovy and Spring Webflow becoming a more ‘just use it where you need it’ solution.
2. Adobe Flex and OpenLaszlo - Flash graphical interfaces on the Web, built using Java. I don’t think these will be *the* mainstream choice but I do think the will be more than a just a niche. And for design led companies, nothing else (not even Microsoft Silverlight) can come close in terms of a user ‘wow’ factor.
3. JavaFX and Applets done right (Jim Weaver has a good article on this). More of a competitor to Adobe Flash as both are rich content in the browser using an easily obtainable plugin. JavaFX will appeal to developers because of it’s Java like syntax. I hope I’m wrong, but for rich web content, would you put your money on Sun (an Engineering led company) or Adobe (an almost apple-like design led one)?
4. Frustration with JSF (Java Server Faces). For the last 3 years I’ve thought that ‘*this* is the year of JSF. I’m still waiting not because of lack of demand (as web apps become more complicated and use more Ajax they become more like the JSF component based model). It’s now uphill for JSF as I (and a lot of other Developers) have given up. I’m still waiting for the ‘EJB 3′ moment when JSF becomes more simple and more usable. Remember , we ‘re not talking about technically best, but which is going to be in widespread use.
5. Google Web Toolkit (GWT). Looking at it one way , GWT is JSF done right - a component based web framework , but one that is fast and has a lot of community support. Even then it took me a long while to warm to GWT - I’ve bad memories of web-components that hide their internals (remember Microsoft Interdev 10 years ago?) . What got me over the hump was thinking of GWT as a compiler not to Assembly or bytecode , but to Javascript and HTML.

How has Struts 2 got on in the meantime? I’m not sure. Remember , Struts 2 is very different from Struts 1. Conceptually it’s very similar to Spring MVC (Simple Java Beans based with configuration); Slightly easier to learn and maybe slightly less powerful than Spring (although both are more than capable for most Enterprise web applications.

The ‘I’m not sure’ bit comes from two (non technical) factors:

1. Struts 2 hasn’t achieved the massive Enterprise developer mind share that Struts 1 did. It’s a better framework, but it’s got more competition.
2. If you’re using Spring in the middle tier, why not have one less framework and use Spring MVC (instead of Struts 2) in the presentation layer as well?

Back to the previous predictions , how did we get on?

Scenario 1: Adding Ajax to existing Struts Applications. Use AjaxAnywhere - closest to the approach taken in the article Sprinkle Some Ajax Magic into your Struts Web Application. Despite writing this article , I see the frameworks evolving rapidly to the point where you would only take such an approach for adding Ajax to ‘Legacy’ applications.

How did we do? I’d maybe widen the choice of Ajax Libraries (to include DWR , Dojo, Prototype and others) but the basic idea of evolving rather than replacing your Struts 1 app still holds true.

Scenario 2: Need Ajax Now for a new Java Application. Use Appfuse as it gives Struts, Ajax (with DWR) and the possiblity of JSF integration now, all ‘out of the box’.

How did we do? I still recommend AppFuse, as it combines (name-your-web-framework) with Spring Hibernate(and other ORM) and Maven. However I’d now tend towards choosing Spring MVC (unless you’ve a reason to use Spring 2), given that you’re probably already using Spring in the mid tier.

Scenario 3: Medium Term. Use an implementation of JSF (either MyFaces or whatever Appfuse promotes - probably Struts Shale). Struts Shale (JSF) has so far released only ‘overnight’ builds. Apache MyFaces (JSF) tool support and Ajax capabilities are likely to improve over time. Both Struts-Shale and MyFaces are likely to play well with AppFuse , making it a safe bet for investing your time checking it out.

How did we do? Struts2 and Spring both still give you migration route to JSF. But do you want it?

So out of the creative ajax-induced chaos of 2 years ago, I see 4 or 5 clear choices in Enterprise web frameworks: Struts 2 (as a follow on from Struts 1). Spring MVC, due to the huge mindshare Spring has on the mid-tier. Google Web Toolkit , both as a natural home of frustrated JSF developers , and because who’s going to argue with the people who gave us maps and mail? Flex, because Flash apps done well just look so good. And JavaFX, because Applets-haven’t-gone-away-you-know.

In my view, we would have been delighted to have any of these framworks 5 years ago. And each (for different reasons) is likely still to be popular in 5 years time. Your missions now is to pick the one that suits your project needs.

Photo by rymus on pix.ie

1. If you’re in business you need computer systems to support your team. Systems to find previous dealings with a customer, systems to allow your team to work together, systems to stop people finding out things that they shouldn’t.
2. Once your business passes the 100 employee mark and is heading for ‘Enterprise’ scale, chances are you need custom software written just for you, in addition to he ’shrink wrap’ stuff you’ve been able to get away with until now.
3. Most custom Enterprise software is written in (or uses a large element of) Enterprise Java.
4. Enterprise Java is hard to get started with - it’s a big and complex framework because it solves big and complex problems. The Spring framework makes it easy.

OK, so we’re Spring nuts. But nuts only because it’s solved problems for FirstPartners over the last 4 years. What we like:

• Spring allows you to use just enough Enterprise Java to solve your problem
• Spring complements Enterprise Java, not replaces it.
• Spring gives you a gentle slope to using Enterprise technologies.
• Spring works well with Java, Oracle, .Net , (J)Ruby and pretty much any mainstream technology - including most of the widespread Java Frameworks like Struts and Hibernate.

So you wait ages for one Spring Event in Ireland, then two come along at once. We’ve written about Rod Johnson speaking in Dublin on Tue March 11th. Now there is a full day Spring Event in Belfast the day before (March 10th). And it’s sponsored by Momentum NI, so it’s free. And the Hilton Hotel is right beside Belfast Central train station, so it’s easy to get to from Dublin.

The full agenda is here (more details below), but given the importance of Spring to the Enterprise world, and the fact that the top four Spring guys are speaking, we reckon that it the Enterprise event of the year. The booking form is here.

Spring Ireland 2008

Start: 10th March 08:30 End: 10th March 17:30
Hilton Belfast, 4 Lanyon Place, Belfast (Beside Central Train station) SpringSource is proud to announce Spring Ireland 2008. Join us for a free one-day conference with presentations from the SpringSource team including a keynote from Rod Johnson.

Keynote: Spring into the Future - Rod Johnson

The Spring Framework began in 2002 with Rod’s best-selling Expert One-on-One J2EE Design and Development; one of the most influential books ever published on J2EE, Rod is recognised as one of the world’s leading authorities on Java and J2EE development.With the rapid expansion of SpringSource and move to new corporate HQ in Silicon Valley, this is a rare UK opportunity to hear Rod provide his views and explore the future of J2EE application development.

What’s New in Spring 2.5 - Sam Brannen

Sam is a lead architect at SpringSource and one of the most experienced developers within the organisation.This session provides delegates with an overview of the new features available in Spring 2.5. Specifically, highlighting the simplified and extensible configuration support provided via configuration annotations and new XML configuration namespaces, new Java 6 support, updates to Spring AOP, improved JDBC and JPA support, annotation-driven web MVC controllers, the new annotation-based TestContext framework for unit and integration tests and more!

SpringSource Professional Services – Greg Southey

Greg has built SpringSource’s UK Professional Services organisation into the leading Spring consultancy business in the world.

This is a brief resume of some of the 97 major projects completed by the UK Professional Services team in 2007. Delegates will hear about the business drivers behind some major development projects, the business issues faced and how they were resolved in partnership with the client.

Spring as a Full Stack Web Framework - David Syer

As Principal Consultant at SpringSource, Dave leads the way in the understanding of satisfying business requirements using the Spring Portfolio. His easy manner cloaks a prodigious knowledge of application development.

This session explores the “full stack” web framework trend and answers the question: how does Spring stack up? This session defines what a full-stack web framework is, then provides a fair technical comparison between a Spring-centric web development stack and the alternatives. Delegates will head about the feature-set of modern “full stack” web frameworks, and what Spring has that differentiates itself from the pack.

Spring in Ireland – Ian Graham

Ian Graham, Momentum, will explore the use of Spring in Ireland and introduce case studies from companies who are using the Spring family of products.

Round Table Discussion - Rod Johnson, Rob Harrop, Dave Syer, Sam Brannen & Greg Southey

Your chance to ask Rod and his team anything that’s on your mind regarding Spring!