In this show Jeremy Hodge comes back to continue his ongoing series on helping XPages Developers get started with Java.
If you like this video, please give it a rating for the Lotus VideoFest event.
Thanks!
NotesIn9 054: Intro To Java for XPages Developers – Part 3
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NotesIn9 076: What are Java Beans?
In this show I attempt to tackle the “forbidden topic”. Yep. Java. Me talk about Java. It’s unexpected. I know. This show is an expanded version of parts of a presentation that I did at MWLug.
I first talk about some of the tools available to the XPages developer and when you might want or not want to use some.
Then I get into the meat of the show – Java Beans. I try and explain exactly what they are and show what they look like. I talk about managed and “unmanaged” beans and go through what they look like and a little bit on how they can be used.
This is a “getting to know them” type show. Not an indepth getting started on building them. I didn’t intend to do this show quite yet but I’m getting some great contributions as part of the Drive to 99 Event that are starting to talk about Java beans so I wanted to get this little intro out.
There’s lots more Java Beans stuff coming. If you can’t wait Jeremy Hodge did 3 shows for NotesIn9 that are highly recommended. I’ll probably be doing my attempt and an indepth intro to Java in the near future as well.
If you have any questions please ask.
P.S. This show is about 36 minutes and I got it in 1 take! BOO YAY!! 
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NotesIn9 84: Sharing Managed Beans in XPages
This show is the first part in a 3 part series from another new contributor to NotesIn9. I’m very excited to bring onto the show Russ Maher who is an excellent XPages developer and speaker. Russ is going to show us how you can use Managed beans to solve a business problem in XPages.
Since this show is once again talking about Java I mention some resources on getting started with the Java Language, especially in learning the syntax. I’ve used the Head First Java book and liked it very much but recently I found a great new website designed to teach the Java Language.
http://howtoprogramwithjava.com
This site is run by Trevor Page. I think it absolutely rocks. It’s has great getting started with Java information that’s very well written in an easy to follow manner. Trvor also does a Podcast and has produced a really good ebook on the subject. I highly recommend checking his site out for anyone who’s starting to learn Java.
He also has a site specifically setup for his Java ebook here: http://javapdf.org You can download a sample and check it out. I bought it as soon as it came out and it’s really well done.
There’s lots more Java XPages material coming to NotesIn9 as well as non Java shows. Remember, as Paul Calhoun likes to say, “Java is just a tool in your XPages toolbox”. I think it’s a really good tool to have.
UPDATE: DEMO FILE for the show
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NotesIn9 085: Sharing Managed Beans in XPages Part 2
In this show Russ Maher comes back on with the 2nd part his 3 part series on creating and working with Java managed Beans in XPages. While the purpose of this episode is to share data between multiple beans, and it’s not a pure “getting started with beans”, there’s a lot of good beginner information in here on how you can use beans and Russ also does a really good discussion on Java Maps. I like that he even talks about this code:
FacesContext.getCurrentInstance().getExternalContext().getSessionMap.get(key)
and describes what each piece really means. Russ will also introduce the concept of variable resolver which seems to be very popular with the advanced XPages developers.
This content should not be missed for an XPages Developer.
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NotesIn9 86: Sharing Managed Beans in XPages Part 3
In this show Russ Maher concludes his three part series on sharing Bean data inside your XPages applicaton. In today’s show he’ll talk about using Managed Properties.
Over the course of this series Russ has taught us a lot about Beans, Java, XPages/JSF concepts like variable resolvers and now Managed Properties for Beans.
I want to thank Russ very much for contributing all this great material to NotesIn9. I really appreciate it and I’m sure others have as well.
UPDATE: DEMO FILE for the show
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NotesIn9 93: Introduction to DOTS
In this episode I welcome Serdar Besegmez, an IBM Champion and new contributor to the show. Serdar will come on to talk about DOTS. DOTS is way for you to create your own server tasks. Very fast and very powerful.
While this topic is a little more on the advanced scale, I think Serdar has done an excellent job of walking through the concepts of DOTS and then showing how to setup your development environment and finally how to run it on the server. He highlights additional resources such as a Show-&-Tell from Lotusphere2012 and even shows a key tip on outputting messages to the console.
I hope you like it.
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NotesIn9 106: Intro to Java Controller Classes
In this show Jesse Gallagher, a great new contribitor, comes on to give us an over view of using Java Controller Classes to help seperate your business logic from your XPage. By moving your logic outside of the XPage you get much cleaner XML source for your XPage.
If you’re new to the thought of using Java inside XPages, I’d suggest don’t focus on the actual syntax that Jesse’s using here but the overall concepts. This is very similar to using Lotusscript custom classes to hold your business logic so you have cleaner agents and view buttons.
Hope you like it.
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NotesIn9 114: Using Wrappers with XPages
In this show yet another NEW contributor comes on to share content with the community. Today, Stephan Wissel, IBMer and blogger at wissel.net comes on the show for a discussion on a programming design pattern called “Facade” and how you might want to use this in your XPages development.
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NotesIn9 116: Data Contexts and Variable Resolvers
In this show Paul Withers returns to enlighten us on what Data Contexts and Variable Resolvers are and how to use them in XPages.
In addition I want to send out some Happy Birthday wishes to:
Bruce Elgort and Mikkel Heisterberg and also a belated Happy Birthday Paul Withers himself!
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NotesIn9 118:Using Java to Sign a Database in XPages
In this show John Jardin comes back on with an interesting demo on how to Sign a nsf AS THE SERVER from an XPage. John will create a very small custom Java Class that he uses as a Managed Bean. A really good demo.
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NotesIn9 122: Working with Java Objects in XPages
This show comes directly from my day job. This is a presentation that I gave to the internal XPages team. I talk about using Java Objects but not necessarily via “Managed Beans”.
A lot of XPages and Java talk centers around “Managed Beans” but that’s not your only option. There are additional ways to use Java Code in your XPages Applications that don’t need Managed Beans. There’s also DataContext, objectData and “ScopedBinding”. NOTE: “ScopedBinding” is a term I’m making up myself.
So I’m really not an expert here, this is just stuff I’ve been playing with and there might be things I’ve missed but this is a simple demo on how to use a Java Class from each of these entry points. I thought it might be useful especially if you hear the term “Java Managed Bean” and think it’s something scary.
Another Note: I have a little Java Class in here for the demo. That Class itself was rushed and not exactly an example of best practice. It’s kinda close, but I left some crap in there that needs to be cleaned up.
Hope You like the show.
P.S. In the show I am asking for feedback on how you prefer to consume NotesIn9 Videos. Do you stream from the website? Do you download and watch off line via iTunes/RSS? Do you prefer YouTube? Any feedback on that would be appreciated. I’m trying to find out preferences between downloading vs streaming for the most part. Feel free to comment here, or send me a note on twitter or email.
thanks!
UPDATE: I mentioned on the video that there were several things that I did not know. Most of them have been answered by the great Tim Tripcony who sent me the information below.
UPDATE 2: Here is the demo file for this show
Comments from Tim Tripcony:
Great video today! I’m hoping I can answer some of the questions you brought up during the demo:
1. Java “purists” would tell you that if your class has A) an argumentless constructor, B) properties exposed via getters and setters, and C) implements Serializable, it’s a bean. With “managed beans”, all that is being “managed” is the variable name and scope. So the class you showed is always a bean, regardless of each of the ways you demo’ed using it, because its own code meets the bean criteria. But you also registered it in faces-config, so Domino “manages” making sure there’s always an instance of that bean named “PersonBean” in the session scope. That’s what makes it managed. It was already a bean because it uses bean conventions (serializable, argumentless constructor, and getters/setters).
2. ignoreRequestParams is ideal for “related” data sources. For instance, if you had an XPages-based blog, and you’re using the standard document data source for blog entries, then you’d want that data source to respect the URL, because then you can use built-in URL parameters like action, documentId, formName, and databaseName, and it’ll know which document to open, whether it’s new, in edit mode or read mode, etc. In contrast, if you had a repeat underneath the entry content to display comments, then your data source for each comment in the repeat *should* set ignoreRequestParams to true. Otherwise, even if you’ve set action to “openDocument” and calculating the documentId based on what row the repeat is rendering, the data will IGNORE those properties, because it will see matching URL parameters and the value of those parameters will override the data source properties. BUT… all of this behavior is the way that the original data sources (document and view) behave. The object data source always ignores the URL, so ignoreRequestParams has no effect, because it always ignores the params. The property just shows up because it’s part of the base interface for all data sources.
3. requestParamPrefix is ideal for “sibling” data sources. What I mean by that is if you have two data sources on a page that are sort of “peers” (as opposed to a parent-response, discussion thread style relationship). For example, suppose you had two documents that you wanted to allow the user to compare side-by-side… if you created one document data source with standard attributes (just var and formName), and a second document data source where requestParamPrefix=”other”, then your URL query string could contain something like documentId=”OU812″&otherdocumentId=”OU813″… So your first data source will be bound to the document whose note ID is OU812, and your second data source will be bound to the document whose note ID is OU813. Object data sources also ignore this property; this only affects document and view data sources.
4. The reason you had to set your data context to compute on page load is because data contexts are automatically associated with the request scope… so if you set it to compute dynamically, then it will create a new one on each request, not just one for each page instance (i.e. view scope). Setting it to compute on page load makes it behave more like a data source than a data context.
5. Your assumption about the syntax of #{sessionScope.ScopeBean.firstName} is correct. All 4 of the scopes are Maps, so when the variable resolver identifies sessionScope as a Map, then the property resolver knows that instead of the usual getPropertyName() / setPropertyName(newValue) syntax, it should call get(“propertyName”) and put(“propertyName”, newValue) instead… but only if it’s the last property in the chain — anything in the middle is always treated as a get. So the whole expression essentially gets translated into sessionScope.get(“ScopeBean”).getFirstName() in read operations, and sessionScope.get(“ScopeBean”).setFirstName() in write operations.
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NotesIn9 127: XPages Parallel Processing
In this show Serdar Basegmez returns with a demo taken from his recent presentation at Icon UK.
He’ll introduce the concept of creating a new thread in your XPages application that can be used for longer running processes. This effectively lets you do 2 things at once in your application.
You can download a demo database here: https://github.com/sbasegmez/ICONUK2013
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NotesIn9 132: Using Java in XPages Part 1
Ok. There’s a lot going on in this show so let’s get started:
This show came from a Skype Chat I had with Tim Tripcony. The goal here is a series that focuses on how you actually use xpages and java beans together. We want to show how to bind to Java Objects instead of documents and actually use them. This is not a full “app” but more of a CRUD example. We didn’t want to distract too much from the core concept of linking XPages to Java Beans directly.
Of course I failed at that as since Tim was using source control for this I wanted to start the show with source control. So you can see me bring the project down and create not only the .ntf but also the .nsf file. So if that’s not too interesting to you skip it. the Java stuff starts around the 15 minute mark I think.
I did do some editing to cut out some other parts that weren’t needed. So there’s a pretty poor transition in there at one point. One of the things I cut out was how Tim was using Themes to pull Bootstap 3 into his app from a CDN. So if you’re interested in Bootstrap you might want to download the app and check that out! Clever. Beats putting it into the NSF.
Today is actually my birthday. So as a gift to the community I wanted to get this show out and start this series. Jesse Gallagher asked if that I was doing a Hobbit Style Birthday. Where a Hobbit gives out gifts on their birthday. Wish I would have thought of it that way. Typical Jesse – usually 3 steps ahead of me.
Anyway – I hope you like the show.
P.S. This show is at another new resolution. 1440×900 I believe. I’m having trouble getting my Parallels VM to use my normal 1280×720 resolution. It works great for my work VM but not my NotesIn9 VM. Really weird. I do like the bigger resolution since you know… it’s Designer and all that. So I might try to keep this. I don’t know. But PLEASE let me know if you have problems viewing the show or reading any code.
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NotesIn9 133: Using Java in XPages Part 2
In this show, Tim Tripcony expounds on the last episode where I did a very basic CRUD example that’s based on Java binding rather then document binding.
I had mentioned one of the problems with building the java classes was that I would create getters and setters for each field. Tim’s going to show how you can build your code to avoid that. He also improves the CRUD example with a little BootStrap Magic!
Tim will return for Part 3 tomorrow!!
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NotesIn9 134: Using Java with XPages Part 3
In this show Tim Tripcony continues his series of exploring the use of Java with your XPages application. Today’s show discusses linking buttons to Java, dealing with ReadOnly properties and how to deal with explilcit getters and setters – but only when you want to!
There’s even a little more Bootstrap goodness in here!
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NotesIn9 135: Using Java in XPages Part4
Tim Tripcony returns again for another great show in his Java series. Today he’ll be introducing the concept of a “MimeBean”. A “MimeBean” gives the ability to save Java Objects inside a notes field. It opens up many new possibilities for storing data in your applications.
Not to be missed!
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NotesIn9 138: XPages Combobox ImprovementsJ
In this show I take a look at using a Combobox inside XPages. I’m going to demo how to use Java – but it’s NOT scary Java – I show you everything.
We’re going to show the user a pretty value in the combobox but get a hold of and store the key value for our use.
I’m also going to show how you can create categories inside the combobox. That’s kinda cool I think depending on your situation.
Update:
Oliver Busse – @zeromancer1972 – has another example of this on his blog. http://mardou.dyndns.org/Privat/osnippets.nsf/id/OBUE-9C5KDN
In that post he’s reading the data in from a view. Cool!
Update 2:
Ove Stoerholt just did a blog post on comboboxes. He discusses one “Gotcha” that you need to avoid. A really good post!
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NotesIn9 141: Java vs JavaScript Throwdown
This is a VERY DIFFERENT NotesIn9. It’s less of a normal show and more if a response to a recent blog post regarding one persons opinion on the value of Java in XPages and the Value of the UI vs the backend. Actually this show is more of a really long “rant”.
This show could absolutely suck. I pretty much broke all my rules and tried to have fun with it. I do give my thoughts on things so maybe there’s at least a little value there.
There’s no Demo. There is only the trainwreck.
I would say that if you do give it a shot. Stick around for the end. That’s when I get my most immature. For the first time ever there’s even a few bloopers at the very end. No not me, but one of the cast members.
I want to thank Mark Roden for the original post. Please check out the comments. There’s a lot of good information in there. Here’s the shortlink:
I hope you like it.
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NotesIn9 144: OAuth for Domino Walkthrough
In this show Tim Tripcony explains how to get your Domino server to PROVIDE OAuth credentials and services.
#codefortim
Note: This show is a odd resolution because Tim sent me his demo at a bigger size then normal. Because of this I’m not sure if it will play on mobile devices.
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NotesIn9 152: JSON and Java
In this show Frank van der Linden, another brand new contributor comes on to give us a little demo of using JSON and JAVA in XPages. If you look closely you might even see a little Connections going on.
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