Best Practice for WD Java Tech deisgns

Hi
Can anyone give me some good points in making good tech design for WD java.
Thanks in advance
Karthika

Hi,
Please search in SDN for ur query.
[http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/com.sap.km.cm.docs/media/streamingmedia/events/sap-teched-2008/virtual%20sap%20teched%2008/composition-and-application-development/comp204%20best%20practices%20for%20optimizing%20web%20dynpro%20java%20application%20performance/comp204.pdf]
Thanks and Regards,

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Brother wrote:
I probably should have posed this question here before I delved into writing Java to get data for reports, but better late than never.
Our ERP is written in COBOL. We have a third party ODBC which allows us to access data using a version of SQL. I have several Java sources compiled in my database that access the data and return something relevant. The Java sources are written in a procedural style rather than taking advantage of object oriented programming with attributes and methods.
OO is a choice not a mandate. Using Java in a procedural way is certainly not ideal but given that it is existing code I would look more into whether is well written procedural code rather than looking at the lack of OO.
Now that I am becoming more comfortable with the Java language, I would greatly appreciate any feedback as to best practices for incorporating Java into my database.
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Brother wrote:
I probably should have posed this question here before I delved into writing Java to get data for reports, but better late than never.
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Consider paying more for good hardware. Computers have almost become commodities, and price shopping abounds, but there are some areas where spending a few dollars more can be beneficial. For example, the difference in price between a top-of-the-line high performance enterprise class hard drive and the cheapest model around with, say, a 1 TB capacity is less than a hundred bucks! Disk drives do fail! They're not all created equal. What would it cost you in aggravation and time to lose your data? Imagine it happening at the worst possible time, because that's exactly when failures occur.
Use an Uninterruptable Power Supply (UPS). Unexpected power outages are TERRIBLE for both computer software and hardware. Lost files and burned out hardware are a possibility. A UPS that will power the computer and monitor can be found at the local high tech store and doesn't cost much. The modern ones will even communicate with the computer via USB to perform an orderly shutdown if the power failure goes on too long for the batteries to keep going. Again, how much is it worth to you to have a computer outage and loss of data?
Work locally, copy files elsewhere. Photoshop likes to be run on files on the local hard drive(s). If you are working in an environment where you have networking, rather than opening a file right off the network, then saving it back there, consider copying the file to your local hard drive then working on it there. This way an unexpected network outage or error won't cause you to lose work.
Never save over your original files. You may have a library of original images you have captured with your camera or created. Sometimes these are in formats that can be re-saved. If you're going to work on one of those files (e.g., to prepare it for some use, such as printing), and it's a file type that can be overwritten (e.g., JPEG), as soon as you open the file save the document in another location, e.g., in Photoshop .psd format.
Save your master files in several places. While you are working in Photoshop, especially if you've done a lot of work on one document, remember to save your work regularly, and you may want to save it in several different places (or copy the file after you have saved it to a backup folder, or save it in a version management system). Things can go wrong and it's nice to be able to go back to a prior saved version without losing too much work.
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I want to discuss what is the best practice for managed bean usage, especially using session scope or request scope to build database driven pages
---- Session Bean ----
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In the case of a page binded to a resultset, the bean usually helds a java.util.List object for the result, which is intialized in the constructor by query the database first. However, this approach has a problem: when user navigates to other page and comes back, the data is not refreshed. You can of course solve the problem by issuing query everytime in your getXXX method. But you need to be very careful that you don't bind this XXX property too many times. In the case of querying in getXXX, setXXX is also tricky as you don't have a member to set. You usually don't want to persist the resultset changes in the setXXX as the changes may not be final, in stead, you want to handle in the actionlistener (like a save(actionevent)).
I would glad to see your thought on this.
--- Request Bean ---
request bean is initialized everytime a reuqest is made. It sometimes drove me nuts because JSF seems not to be every consistent in updating model values. Suppose you have a page showing parent-children a list of records from database, and you also allow user to change directly on the children. if I hbind the parent to a bean called #{Parent} and you bind the children to ADF table (value="#{Parent.children}" var="rowValue". If I set Parent as a request scope, the setChildren method is never called when I submit the form. Not sure if this is just for ADF or it is JSF problem. But if you change the bean to session scope, everything works fine.
I believe JSF doesn't update the bindings for all component attributes. It only update the input component value binding. Some one please verify this is true.
In many cases, i found request bean is very hard to work with if there are lots of updates. (I have lots of trouble with update the binding value for rendered attributes).
However, request bean is working fine for read only pages and simple binded forms. It definitely frees up memory quicker than session bean.
----- any comments or opinions are welcome!!! ------

I think it should be either Option 2 or Option 3.
Option 2 would be necessary if the bean data depends on some request parameters.
(Example: Getting customer bean for a particular customer id)
Otherwise Option 3 seems the reasonable approach.
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Best practice for integrating oracle atg with external web service

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Edited by: Rajeev_R on Apr 29, 2013 3:49 AM

Best practice for mouseless ADF applications

I am developing an ADF application where the users do not want to use the mouse.
So I would like to know if there are a best practice for this?
I am already using the accessKey functionality and subforms defaultCommand
But I have had problems setting focus to objects on a page like tables. I would like a button to return the focus to the table after it has made the command like delete.
I have implemented a solution where I have found inspiration several threads and other webpages (see below).
Is this solution okay?
Are there any problems with it?
I would also like to know if there are better pathways to go like
out of the box solutions,
http://www.oracle.com/technetwork/developer-tools/adf/learnmore/79-global-template-button-strategy-360139.pdf (are there an example implementation?), or
http://one-size-doesnt-fit-all.blogspot.dk/2010/11/adf-ui-shell-supporting-global-hotkeys.html
in advance thanks
Inspiration webpages
https://blogs.oracle.com/jdevotnharvest/entry/how_to_programmatically_set_focus
http://technology.amis.nl/2008/01/04/adf-11g-rich-faces-focus-on-field-after-button-press-or-ppr-including-javascript-in-ppr-response-and-clientlisteners-client-side-programming-in-adf-faces-rich-client-components-part-2/
how to Commit table by writting Java code in Managed Bean?
Table does not refresh and getting error as UIComponent is Null
A short description of the solution:
(jdeveloper version 11.1.1.2.0)
--- Example where I use onSetFocus in jsff page
<af:commandButton text="#{hrsusuiBundle.FOCUS}" id="cb10"
partialSubmit="true" accessKey="f"
shortDesc="Alt+Shift+F"
actionListener="#{managedBean_clientUtils.onSetFocus}">
<af:clientAttribute name="focusField" value="t1"/>
</af:commandButton>
--- Examples where I use doTableActionAndSetFocus in jsff page
--- There have to be a binding in the jsff page to delete, commit and rollback
<af:commandButton text="#{hrsusuiBundle.DELETE}" id="cb4"
accessKey="x"
shortDesc="Alt+Shift+X"
partialSubmit="true"
actionListener="#{managedBean_clientUtils.doTableActionAndSetFocus}">
<af:clientAttribute name="focusField" value="t1"/>
<af:clientAttribute name="actionField" value="Delete"/>
</af:commandButton>
<af:commandButton text="#{hrsusuiBundle.COMMIT}" id="cb5"
accessKey="s" shortDesc="Alt+Shift+S"
partialSubmit="true"
actionListener="#{managedBean_clientUtils.doTableActionAndSetFocus}">
<af:clientAttribute name="focusField" value="t1"/>
<af:clientAttribute name="actionField" value="Commit"/>
</af:commandButton>
<af:commandButton text="#{hrsusuiBundle.ROLLBACK}" id="cb6"
accessKey="z" shortDesc="Alt+Shift+Z"
partialSubmit="true"
actionListener="#{managedBean_clientUtils.doTableActionAndSetFocus}"
immediate="true">
<af:resetActionListener/>
<af:clientAttribute name="focusField" value="t1"/>
<af:clientAttribute name="actionField" value="Rollback"/>
</af:commandButton>
--- This is the java class I use
--- It is published in adfc-config.xml as a request scope managedbean
public class ClientUtils {
public ClientUtils() {
public void doTableActionAndSetFocus(ActionEvent event) {
RichCommandButton rcb = (RichCommandButton)event.getSource();
String focusOn = (String)rcb.getAttributes().get("focusField");
String actionToDo = (String)rcb.getAttributes().get("actionField");
UIComponent component = null;
String clientId = null;
component = JSFUtils.findComponentInRoot(focusOn);
clientId = component.getClientId(JSFUtils.getFacesContext());
if ( "Delete".equals(actionToDo) || "Commit".equals(actionToDo) || "Rollback".equals(actionToDo) ){
BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
OperationBinding operationBinding = bindings.getOperationBinding(actionToDo);
Object result = operationBinding.execute();
AdfFacesContext.getCurrentInstance().addPartialTarget(component);
if (clientId != null) {
makeSetFocusJavaScript(clientId);
public static String onSetFocus(ActionEvent event) {
RichCommandButton rcb = (RichCommandButton)event.getSource();
String focusOn = (String)rcb.getAttributes().get("focusField");
String clientId = null;
if (focusOn.contains(":")) {
clientId = focusOn;
} else {
clientId = findComponentsClientIdInRoot(focusOn);
if (clientId != null) {
makeSetFocusJavaScript(clientId);
return null;
private static void writeJavaScriptToClient(String script) {
FacesContext fctx = FacesContext.getCurrentInstance();
ExtendedRenderKitService erks = null;
erks = Service.getRenderKitService(fctx, ExtendedRenderKitService.class);
erks.addScript(fctx, script);
public static void makeSetFocusJavaScript(String clientId) {
if (clientId != null) {
StringBuilder script = new StringBuilder();
//use client id to ensure component is found if located in
//naming container
script.append("var textInput = ");
script.append("AdfPage.PAGE.findComponentByAbsoluteId");
script.append ("('"+clientId+"');");
script.append("if(textInput != null){");
script.append("textInput.focus();");
script.append("}");
writeJavaScriptToClient(script.toString());
public static String findComponentsClientIdInRoot(String id) {
UIComponent component = null;
String clientId = null;
component = JSFUtils.findComponentInRoot(id);
clientId = component.getClientId(JSFUtils.getFacesContext());
return clientId;
}

Hi,
I am developing an ADF application where the users do not want to use the mouse. So I would like to know if there are a best practice for this?
Well HTML (and this is the user interface you see) follows a tab index navigation that you follow with "tab" and "shift+tab". Anything else is a short cut for which you use mnemonics (as you already do) or shortcuts (explained in http://one-size-doesnt-fit-all.blogspot.dk/2010/11/adf-ui-shell-supporting-global-hotkeys.html). There is a distinction to make between non-web environments (which I think you and your users have abackground in) and client desktop environments. Browsers block some keyboard functionality for their own purpose. So you may have to find a list of keys first that work across browsers. Unlike desktop clients, which allow you to "press a button" without the button to take focus, this cannot be done on the web. So you need to be clever here, avoiding buttons at all.
The following paper is about JavaScript in ADF and explains the basics for what Chris Muir explains in : http://one-size-doesnt-fit-all.blogspot.dk/2010/11/adf-ui-shell-supporting-global-hotkeys.html
http://www.oracle.com/technetwork/developer-tools/jdev/1-2011-javascript-302460.pdf
It has the outline for how to register short cut keys that perform a specific action (e.g. register ctrl+d to delete the current row you are on, or press F11 to execute a query (similar to Oracle Forms frmres files)). However, be aware that this includes some code you have to write (actually quite some code to be honest).
http://www.oracle.com/technetwork/developer-tools/adf/learnmore/79-global-template-button-strategy-360139.pdf (are there an example implementation?), or
http://one-size-doesnt-fit-all.blogspot.dk/2010/11/adf-ui-shell-supporting-global-hotkeys.html
Actually these are implementations as they come with example code for you to use and customize, do they? So what is this question asking for more ? Also note that global buttons don't quite have anything in common with the question you asked. I assume you want to see it as an implementation of the Forms toolbar that operates on the form or table the focus is in. This however does not work for the web as there is nothing that keeps track of which component has a focus and to what iterator (data block) it belongs. This would involve even more coding (though possibly doable)
Frank

Best practice for loading config params for web services in BEA

Hello all.
I have deployed a web service using a java class as back end.
I want to read in config values (like init-params for servlets in web.xml). What
is the best practice for doing this in BEA framework? I am not sure how to use
the web.xml file in WAR file since I do not know how the name of the underlying
servlet.
Any useful pointers will be very much appreciated.
Thank you.

It doesnt matter whether the service is invoked as part of your larger process or not, if it is performing any business critical operation then it should be secured.
The idea of SOA / designing services is to have the services available so that it can be orchestrated as part of any other business process.
Today you may have secured your parent services and tomorrow you could come up with a new service which may use one of the existing lower level services.
If all the services are in one Application server you can make the configuration/development environment lot easier by securing them using the Gateway.
Typical probelm with any gateway architecture is that the service is available without any security enforcement when accessed directly.
You can enforce rules at your network layer to allow access to the App server only from Gateway.
When you have the liberty to use OWSM or any other WS-Security products, i would stay away from any extensions. Two things to consider
The next BPEL developer in your project may not be aware of Security extensions
Centralizing Security enforcement will make your development and security operations as loosely coupled and addresses scalability.
Thanks
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Best practice for simply invoking a web service

Hello,
We have web services deployed and accessible as wsdl documents in the SOA service manager/UDDI product. What is the best practice for simply calling a web service method deployed without regard to whether it is deployed on Tomcat, WebSphere, Oracle, etc.
I'd just like to create a java client to make a web service call and JAXRPC has me confused because you seem to have to have custody of the web service implementation code to call a service. Can someone point me in the right direction?
Thanks,
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Thanks. Here is my wsdl, how would you say this is encoded?
<?xml version="1.0" encoding="UTF-8"?>
<definitions
     name="OracleProcess"
     targetNamespace="http://xmlns.oracle.com/OracleProcess"
     xmlns="http://schemas.xmlsoap.org/wsdl/"
     xmlns:tns="http://xmlns.oracle.com/OracleProcess"
     xmlns:plnk="http://schemas.xmlsoap.org/ws/2003/05/partner-link/"
     xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
     xmlns:client="http://xmlns.oracle.com/OracleProcess"
    >
    <types>
        <schema attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://xmlns.oracle.com/OracleProcess"
             xmlns="http://www.w3.org/2001/XMLSchema">
            <element name="OracleProcessProcessRequest">
                <complexType>
                    <sequence>
                        <element name="input" type="string"/>
                        <element name="input2" type="string"/>
                    </sequence>
                </complexType>
            </element>
            <element name="OracleProcessProcessResponse">
                <complexType>
                    <sequence>
                        <element name="result" type="string"/>
                    </sequence>
                </complexType>
            </element>
        </schema>
    </types>
    <message name="OracleProcessRequestMessage">
        <part name="payload" element="tns:OracleProcessProcessRequest"/>
    </message>
    <message name="OracleProcessResponseMessage">
        <part name="payload" element="tns:OracleProcessProcessResponse"/>
    </message>
    <portType name="OracleProcess">
        <operation name="process">
            <input message="tns:OracleProcessRequestMessage"/>
            <output message="tns:OracleProcessResponseMessage"/>
        </operation>
    </portType>
    <binding name="OracleProcessBinding" type="tns:OracleProcess">
        <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
        <operation name="process">
            <soap:operation style="document" soapAction="process"/>
            <input>
                <soap:body use="literal"/>
            </input>
            <output>
                <soap:body use="literal"/>
            </output>
        </operation>
    </binding>
    <service name="OracleProcess">
        <port name="OracleProcessPort" binding="tns:OracleProcessBinding">
            <soap:address location="http://st4s:9700/orabpel/default/OracleProcess/1.0"/>
        </port>
    </service>
<plnk:partnerLinkType name="OracleProcess">
    <plnk:role name="OracleProcessProvider">
      <plnk:portType name="tns:OracleProcess"/>
    </plnk:role>
</plnk:partnerLinkType>
</definitions>

Best Practice For Referencing JPEG Path Using Servlets To Prepare HTML IMG

I am migrating a legacy app from Tomcat 5 to Weblogic 11g (10.3). In the legacy app, servlets write HTML that uses relative paths for <IMG src="../images/img.jpeg"> and <script src="../javascript/js.js">. The app is deployed as an exploded archive. Unfortunately, none of the images or script are being loaded. I've tried using http://serverIP:portNum/contextName/images/img.jpeg"> but it doesn't work. I've also checked to get the name of the context in the servlet and it's the root context. Could it have something to do with me having to append .war onto the application when I deploy it? Would it help if I deployed it as a war inside an ear? Basically, I want some best practices for doing this on Weblogic 11g. There are a lot of images and javascript and I'm really hoping they don't have to be inserted using ClassLoader.getResourceAsStream()... thank you.

Best Practice:
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Best practice for heirachical data

First off, I have to say that JMX in Java 6 is terrific stuff. Bundling jconsole in with Java has made JMX adoption so much easier for us.
Now, to my question. We have read-only hierarchical data (think a DOM tree) that we would like to publish via JMX. What is the best practice? We see two possibilities:
1. Publish each node of the tree with it's own object name and type. This will allow jconsole to display the information in the tree control.
2. Publish just the root of the tree with an object name and type and then use CompositeType to describe the nodes of the tree. This means you look at the tree in the "Attribute Value" panel of jconsole.
Is there any best practices for such data? We have implemented #2 and it works but we are wondering if long term this might lead to unforeseen consequences.
Thanks in advance.
--Marty

Path,
I did go with #1 and it worked out great. Every node in our tree is an ObjectName node. Works very well for us.
--Marty

Best Practice for Servlets

I guess I'm asking for most peoples' input on what I'm planning to do here ....
Here's what I want to do, and know a bit about.
o I want to make a servlet that serves only XML.
o After that, I want to transform the XML into web pages, RSS feeds etc.. using XSLT.
Here's what I'm not so sure about...
o How should I implement the interface to the web-based aspects? Should the servlet be coded to display HTML pages on "GET" requests? Or should I use a pile of HTML files to make forms?
o What do I use to perform the XSLT transformations? Where should the set of solutions be placed relative to my servlet? Would a user then access this solution rather than the servlet itself?
o How do I code the servlet on one machine, and then test it on another without breaking the libraries? How do I set up any libraries I might have to use (like for XSLT transformations) on the server?
Any other advice here? I'm sure this is done often, but I can't find a resource that explains the best practices for it all.
I know this sounds like a lot of stupid questions. I've had lots of programs working with Java before, but I'm at a loss as to how I'm supposed to package libraries I use in my programs - moreso with a servlet. To make matters worse, I plan on using MySQL as the database.
If there's some wizard on the forums here who's willing to say more than just "RTFM" (of which there is none to answer my questions together as one), I'd be very very happy ":^)

Let me re-pose my question so as to be specific
enough to not be picked apart in my answer.
I want to FIRST AND FOREMOST, create a servlet that
serves up XML based on parameters given to it (how?
who cares.).What does "serves up XML" mean?
Let's be precise. Do you intend the servlet to send the XML back to the client? Or is the XML an intermediate step in your processing? (Yes, it matters.)
Then, I want to create interfaces (HTML, RSS,
boogledeedoo) to this XML data by having either JSP,
another servlet or insert something else here,
transform the XML into whatever the desired format
is."interface" is a loaded term in Java. What do you mean by it?
>
My assumption is that I'll make the servlet that is
capable of outputting my desired XML data and then
create another servlet that will poke it for data as
needed to transform the XML into HTML. This servlet
would also likely serve as the web site itself and
would manage user logins etc...(persistance yaddy
yadda)You're not thinking about this properly.
"yadda yadda" == muddled thinking.
My other assumption is that I'll make another servlet
that will poke the XML servlet and transform that
into RSS or anything else I can dream up.How does "poke the XML servlet" fit into the request/response protocol that is HTTP? Please explain.
-=-!REASONING!-=-
Previously, when I was working with PHP, I liked to
make scripts that would display interfaces and post
to themselves. OK, now I see. "interface" == GUI in a browser to you. Very good.
You can create a JSP that is an interface. You can have that JSP submit the HTTP POST or GET request to itself. No problem there, as long as "itself" knows what to do with the request.
It was a nice way of creating a
complete little package. Everything for one function
was encapsulated nicely under one roof. No excessive
HTML files all over the place to nurture.A simple problem, a simple solution. You can do that with a JSP.
Look. Part of my inability to describe this well is
because I DO feel like I'm in a lot of directions at
once. Or you don't understand the technology very well.
But I have to be in order to pull together
some sort of plan for myself. I understand many
concepts and have just finished studying object
oriented design etc..."Just finished"? How long did it take?
I know things about how Tomcat does connection
pooling for SQL connections.Great. Not much to understand there. It's harder to figure out how to do n-tier apps with more than one page well.
I do know how to use Google, probably a lot better
than most. But rest assured, I've yet to find a
little guide as complete as any of the "LAMP" books
there are out there. Which by the way, I have never
purchased.That's because Java Enterprise Edition isn't intended for little problems. LAMP is. Maybe the limitation is that you are used to "little" problems and not bigger ones.
If JEE seems scattered and complex, it's because it is. It encompasses more than LAMP.
I'm confident in good guidance, and not a heartfelt
smackdown. I'm still waiting for some clear suggestions.I gave you one, you just didn't know it: go read about Spring.
http://www.springframework.org
It'll help you structure complex apps from the user interface to the database in the back.
You're welcome.
%

Validation Best Practice for an javafx project

Hello,
I am investigating how to validate a JavaFX project and specifically where to display the validation results with appropriate icons and text. Do you have any thoughts on best practice for this? Are there any features in JavaFX to do this? Are there any third-party library that does this?
Thanks

See:
Re: Forms and validations - here's some of my ideas, what are yours? "Thread: Forms and validations - here's some of my ideas, what are yours?"
And messages in this mailing list thread:
http://mail.openjdk.java.net/pipermail/openjfx-dev/2012-February/000717.html "Validate Me"

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