BC4J + Struts: Design questions!

OK, I'm wanting to use Struts with BC4J and have a design question for you BC4J users and gurus.
Here's how I think things would work:
1. User requests page
2. Struts ActionServlet calls perform() on Struts ActionForm
3. Struts ActionForm instantiates BC4J AppModule and calls business method
4. BC4J AppModule instantiates necessary BC4J ViewObjects and performs business operations which return data
5. Struts ActionForm receives value objects from BC4J AppModule
6. Struts ActionForm populates Struts FormBean
7. Struts ActionForm forwards to Struts JSP which displays Struts FormBean
I prefixed the components with Struts/BC4J to keep things clear where things belong.
Now, here are my questions:
In step 3, what's the best method of doing this? Do I need to do JNDI lookups every time? What's the performance overhead of this? Anyone have any best-practice code that does this?
Is this the accepted way of doing things? Is there a better way of designing this system?
Thanks!

In Step3 you should use the ApplicationModule pooling framework, especially if you are trying to work in stateful mode because the pooling automatically handle the AM activation/passivation.
There are different way to go at it.
If you are using the BC4J custom tag library and have an ApplicationModule tag in your jsp, the pooling is already initialize. By the time your action is trigger you just need to retrieve the am using the application id:
in your jsp:
<jbo:ApplicationModule id="myAM" ... />
in your Action implementation:
HttpContainer container = HttpContainer.getInstanceFromSession(request.getSession());
SessionCookie cookie = container.getSessionCookie("myAM");
ApplicationModule am = null;
if (cookie != null)
am cookie.useApplicationModule();
This AM id can be passed as URL parameter...
If you do have a JSP with an AM tag you need to create the pool with findSessionCookie call.
For more info about AM pooling look at the end of this thread for Steve resources:
http://forums.oracle.com/forums/message.jsp?id=912431&gid=513211
This is what we are currently doing for to provide support for BC4J in Struts for our next release.
Charles.

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part 2 of posting:
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// Then use request para[i]Long postings are being truncated to ~1 kB at this time.

Design question: Scheduling a Variable-timeslot Resource

I originally posted this in general java programming, because this seemed like a more high-level design descussion. But now I see some class design questions. Please excuse me if this thread does not belong here (this is my first time using the forum, save answering a couple questions).
Forum,
I am having trouble determining a data structure and applicable algorithm (actually, even more general than the data structure -- the general design to use) for holding a modifiable (but more heavily read/queried than updated), variable-timeslot schedule for a given resource. Here's the situation:
Let's, for explanation purposes, say we're scheduling a school. The school has many resources. A resource is anything that can be reserved for a given event: classroom, gym, basketball, teacher, janitor, etc.
Ok, so maybe the school deal isn't the best example. Let's assume, for the sake of explanation, that classes can be any amount of time in length: 50 minutes, 127 minutes, 4 hours, 3 seconds, etc.
Now, the school has a base operation schedule, e.g. they're open from 8am to 5pm MTWRF and 10am to 2pm on saturday and sunday. Events in the school can only occur during these times, obviously.
Then, each resource has its own base operation schedule, e.g. the gym is open from noon to 5pm MTWRF and noon to 2pm on sat. and sun. The default base operation schedule for any resource is the school which "owns" the resource.
But then there are exceptions to the base operation schedule. The school (and therefore all its resources) are closed on holidays. The gym is closed on the third friday of every month for maintenance, or something like that. There are also exceptions to the available schedule due to reservations. I've implemented reservations as exceptions with a different status code to simplify things a little bit: because the basic idea is that an exception is either an addition to or removal from the scheduleable times of that resource. Each exception (reservation, closed for maintenance, etc) can be an (effectively) unrestricted amount of time.
Ok, enough set up. Somehow I need to be able to "flatten" all this information into a schedule that I can display to the user, query against, and update.
The issue is complicated more by recurring events, but I think I have that handled already and can make a recurring event be transparent from the application point of view. I just need to figure out how to represent this.
This is my current idea, and I don't like it at all:
A TimeSlot object, holding a beginning date and ending date. A data structure that holds list of TimeSlot objects in order by date. I'd probably also hold an index of some sort that maps some constant span of time to a general area in the data structure where times around there can be found, so I avoid O(n) time searching for a given time to find whether or not it is open.
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If I am correct, your requirement is to display a schedule, showing the occupancy of a resource (open/closed/used/free and other kind of information) on a time line.
I do not say that your design is incorrect. What I state below is strictly my views and should be treated that way.
I would not go by time-slot, instead, I would go by resource, for instance the gym, the class rooms (identified accordingly), the swimming pool etc. are all resources. Therefore (for the requirements you have specified), I would create a class, lets say "Resource" to represent all the resources. I would recommend two attributes at this stage ("name" & "identifier").
The primary attribute of interest in this case would be a date (starting at 00:00hrs and ending at 24:00hrs.), a span of 24hrs broken to the smallest unit of a minute (seconds really are not very practical here).
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The "Resource" class would carry an attribute of "resourceStatus", an ordered vector of "ResourceStatus" objects.
The object (all the objects) could be populated manually at any time, or the entire process could be automated (that is a separate area).
The problem of representation is over. You could add any number of resources as well as any number of status categories.
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regards
[email protected]

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I'm planning to implement the Sun Java System Directory Server 5.2 2005Q1 for replacing the NIS.
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Message was edited by:
dakger

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Edited by: user5108636 on Jun 13, 2011 4:19 PM
Edited by: user5108636 on Jun 13, 2011 7:03 PM

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Mike,
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First of all, here is my code
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TYPE USERCONTEXT AS OBJECT
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Struts Interview questions

Send Struts interview question in my mail id [email protected]

send me struts interview questionsDumb idiots. Couldn't you read the thread?another racist?!?Another idiot. Spamming fora again?!?Sorry Maris not here now please try again later.No thanks. I'm tired os talking nonsense. :(Sorry. :(
You do know that despite any other commentary over time this thread will balloon to 100's of posts just like 2 and 4 though right?
<crawling behind rock again/>

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If Buidling X users want to talk to building Y Users, then how Control & Data Traffic flow will happen between Buidling X & Y. Would all the traffic will go to Primary WLC from Bldg X APs first and then it will be Re Routed back to Buidling Y APs? Can i achieve direct switching between Bldg X&Y APs without going toward WLC?
Traffic flows to the WLC that is the primary for the AP's, then its routed over your network.
If Building X & Y Users want to access the Internet, how would be traffic flow? Would the traffic from X&Y AP will go tunnel all the traffic towards WLC and then it will be routed to Internet gateway?is it possible for Bldg X&Y AP to directly send traffic towards Internet Gateway without going to controllers?
The WLC isn't a router, so you would have to put the Internet traffic an a subnet and route.
I have planned to put WLC at physically different locations in different DC A & B. Is it recommended to have such a design? What would be the Failover traffic volume if Primary WLC goes down and secondary controller takes over?
Like I mentioned... earlier, the two HA WLC has to be on the same layer 2 subnet in order for you to use HA. The guide mentions an Ethernet cable to connect both the HA ports on the WLC.
Thanks,
Scott
Help out other by using the rating system and marking answered questions as "Answered"

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<META NAME="robots" CONTENT="xxxxx">
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<META NAME="copyright" CONTENT="xxxxxx">
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<meta name="keywords" xxxxxxxxxxxxx">
<meta name="description" CONTENT="xxxxxxx">
<meta name="robots" CONTENT="xxxxxx">
<meta name="author" CONTENT="xxxxxxxx">
<meta name="copyright" CONTENT="xxxxxxxx">
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Dream weaver creators need to focus on these errors because they hinder seo and they create alot of extra work
Thank you

The w3c and XHTML have come a ways since the release of Dreamweaver 8 (I used it in late 2004 and 2005).
Dreamweaver 8 will build transitional XHTML files as well as old style single tag HTML. It all depends on the personal preferences of the designer.
Just for kicks, go to say... 20 random websites and see just how many get a green light when you validate them. If its half, you're lucky. This page doesn't even validate;
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I also use a local validator program to check my code before putting anything.
That's why they call it WYSIWYG software.
If it did everything perfectly for everyone every single time, good web designers would find themselves out of work.

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Please help me, I need a solution. Does somebody use BC4J/Struts/Tiles ? Any Experience ? Problem ?
Thanks
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BC4J + Struts: Design questions!

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