Baig's Technology Blog

Slides from my Sessions at Collaborate 2013

2013-04-09T11:55:00.000-05:00

Greetings,

I presented 2 sessions at Collaborate 2013 in Denver. Following are slides from it.

Talking Services with Oracle ADF and Oracle SOA Suite from Zeeshan Baig

Oracle SOA Suite for High availability Enterprises from Zeeshan Baig

Enjoy,
Zeeshan Baig

My Sessions at Collaborate 2013 in Denver

2013-03-04T09:44:00.001-06:00

Hi,

This year i am going to speak in 2 sessions at IOUG Collaborate Conference in Denver. I will be sharing some my experience and best practices in these quick tips sessions. Please mark your calendars and come to say Hello.

Click on the link for more info

Click here for more info

See you in Denver,
Zeeshan Baig
@baigsorcl

Setting up WebLogic server for REST Web Services

2013-02-20T11:29:00.003-06:00

Hi,

REST web services are getting popular with the time. They are programmer friendly and easy to develop.

By default weblogic server ships with all required shared libraries for REST but there is one step we need to do in order to activate it which is to deploy those libraries on domain.

The step is simple. All we need to do is to deploy required libraries from
$WLS_HOME/common/deployable-libraries to weblogic domain

In my case i had following libraries used in my application

jersey-bundle 1.1.5.1
jsr311-api-1.1.1

1. Go to weblogic console http://server:port/console
2. Go to Deployment link (click Lock & Edit if in production mode)
3. Click install and choose libraries as shown in the slide
4. Follow wizard and active.

Reference http://docs.oracle.com/cd/E17904_01/web.1111/e13734/rest.htm#WSADV572

Cheers,
Zeeshan Baig
Follow me on twitter @baigsorcl

How to enable System.out.println messages in Weblogic server

2013-02-12T10:06:00.001-06:00

Hi,

Using System.out.println is common practice to debug issues in Java applications. However, in ADF applications using ADF logger is common and best practice. But if we have some web services/ java apps deployed on weblogic server mostly it will use System.out.println

By default Weblogic server does not display the standard System.out.println messages. To enable those go to weblogic console http://<server-name>:port/console

Click Domain Name > Environments > Servers > <Server-name> > Logging and check the following options under Advanced option

Restart the specific managed server and now the System.out.println messages will be visible on the ServerName.log file which is commonly under domain_directory/servers/<server-name>/logs

Cheers,
Zeeshan Baig

How to Create Virtual Directory in Weblogic Server

2012-11-20T16:15:00.001-06:00

Hi,

You can host your static files like images, javaScript, CSS content to Weblogic server as well. In ideal world these files usually are part of web server but in the absense of HTTP web server like Apache, IIS we can use Weblogic server to host these files.

The benefit of keeping file like that is that all your project's static files like logos, bullets etc etc will reside on OS and in case of any changes all you need to change at OS level instead of application server level.

In summary we will create a simple app which will use the '/images' context of WLS and all we need to do in our apps to use /images context to retrieve the image.

1. Create a folder on your OS and put all your static images files there
e.g. c:\Jdeveloper\sharedLibs\images\

2. Create Application called 'VirtualDirectoryApp' using Fusion Template

3. Delete Model Project by right clicking it and Click New on ViewController Project and Create weblogic deployment description this will create weblogic.xml file

4. Set the properties of Directories weblogic.xml as shown in the slide

5. Set the context of the application to /virtual

6. Now deploy the WAR file by right clicking the ViewController Project and call the content of directory via following URL

http://myserver:myport/virtual/imagename.jpg

Download the Virtual Directory App

Happy Jdeveloping,

Zeeshan Baig

Follow me on Twitter @baigsorcl

Oracle ADF - Using Region Navigation Listener in af:region

2012-10-05T11:40:00.000-05:00

Greetings,

Its been long that i have posted something related to ADF. Thanks to my visitors who ask questions to keep me alive.

One reader shared a use case with me as follows

"We have a requirement to collapse a panel in Panel splitter for specific activity in a region"

The answer for that is use Region Listener in af:region component.

The Region Listener have a RegionNavigationEvent argument which can provide the current view in a af:region based on that you can conditionally collapse or expand panel

Example: Download complete example

In my bounded task flow i got 3 views, view 1-3 respectively as shown in the slide.

I have home page with Panel splitter and af:region in facet 2

My use case is to collapse left panel when user navigates to view 2 in a region.

I have a Region Listener as follows

I have panel splitter binding in the bean

The Region Navigation Listener code is as follows

public class RegionNavigationListener {

private RichPanelSplitter myPanel;

public RegionNavigationListener() {

}

public void onRegionNavigated(RegionNavigationEvent region) {

String viewId = region.getNewViewId();

if (viewId.equalsIgnoreCase("/region-flow-definition/view2")) {

doCollapsePanel(myPanel);

}

else {

doExpandPanel(myPanel);

}

private void doCollapsePanel(RichPanelSplitter panel){

panel.setCollapsed(true);

AdfFacesContext.getCurrentInstance().addPartialTarget(panel);

}

private void doExpandPanel(RichPanelSplitter panel){

panel.setCollapsed(false);

AdfFacesContext.getCurrentInstance().addPartialTarget(panel);

}

public void setMyPanel(RichPanelSplitter myPanel) {

this.myPanel = myPanel;

}

public RichPanelSplitter getMyPanel() {

return myPanel;

}

Hope you like it

Follow me on twitter and happy Jdeveloping,

Zeeshan Baig

I am Featured in Oracle Magazine September 2012 issue

2012-08-28T09:17:00.000-05:00

Hi,

Its a great honor for me that my profile featured in Peer to Peer section of Oracle Magazine in September 2012 issue. I believe that issue will be main issue for Oracle Open World 2012 as well.

Check the following link Oracle Magazine Peer to Peer September 2012

I am thankful to all who supported through out my career so i can dream of this day and also to people who visited this blog and found it helpful.

P.S. Lot of people asking about the photo...Its Grand canyon Arizona i visited there after collaborate 2012 conference in Las Vegas.

Cheers,
Zeeshan Baig
Follow me Twitter @baigsorcl

Sharing Common Connections Between JDeveloper Machines

2012-07-18T10:52:00.000-05:00

Hi,

In order to work in a team environment JDeveloper offers many small nuggets that can make our life easier and implement development standards.

In this post we will take a look how to export and import application servers, database connections from one Jdeveloper machine to another. You can even store these connections in your source control system to share.

Resource Palette:

You will find common place for all connections in JDeveloper under Resource Palette. Click View menu and select Resource Palette

Exporting Connection:

Right click on your desired connection and choose Export, select which connections you want to export and provide the destination, click OK the resulting window will give you the status

Save the destination file to source control or network drive (optional):

For better teamwork i would recommend to store these connections in source control system as shown in the slide i have a folder in Visual SVN repository called Connections and under that the exported file from JDeveloper.

Importing a Connection into JDeveloper

Now developers can export the connections from source control system to their file system and import connections into JDeveloper.

There you go hope you find the post useful feel free to comment. More gold nuggets to follow.

Happy JDeveloping,

Zeeshan Baig

Solution to fix Exception java.lang.NoClassDefFoundError While running weblogic commands from console

2012-07-06T15:55:00.002-05:00

Hi,

A quick one here. Most of us might experienced this when try to run weblogic.Deployer or any weblogic related command from console or shell prompt you see something like this

C:\>java weblogic.Deployer
Exception in thread "main" java.lang.NoClassDefFoundError: weblogic/Deployer
Caused by: java.lang.ClassNotFoundException: weblogic.Deployer
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: weblogic.Deployer.  Program will exit.

The problem is NOT with your installation or configuration but actually java is not able to find classes related to weblogic

Solution:

The solution is to add the JAR file into the CLASSPATH variable.

C:\> set CLASSPATH=%CLASSPATH%;D:\Oracle\Middleware1035\wlserver_10.3\server\lib\weblogic.jar

Note: Change above command as per your environment Linux or Windows also i saw some people add the location of the folder to Classpath which will not fix the issue you should provide the name of the JAR file as mentioned above.

You can see in the slide how the error gone by adding CLASSPATH to the environment.

My Presentation from Kscope 2012 Conference

2012-07-02T12:51:00.001-05:00

Hi,

Kscope 2012 conference was a great event for me i am thankful to ODTUG management by providing me this opportunity also OTN who gave me opportunity to be on Fusion middleware panel during Lunch n Learn session.

You can view my presentation from Kscope from my slideshare account. I will post separate blog on the demo details.

Setting Up Ideal Development Environment for JDeveloper

View more PowerPoint from Zeeshan Baig

Hope you like it,
Zeeshan Baig

My Interview featured in May 2012 OTN Harvest

2012-06-04T15:03:00.000-05:00

Hi,

Its been a great honor for me to be featured in OTN Harvest Spotlight. I am thankful to Oracle to recognized my contribution and to all visitors of this blog by providing positive feedback which helps be keep going

You can find the digest online on Oracle’s website using following link http://www.oracle.com/technetwork/developer-tools/adf/learnmore/index-101235.html#OtnHarvest

And download the issue http://www.oracle.com/technetwork/developer-tools/adf/learnmore/may2012-otn-harvest-1652358.pdf

Happy JDeveloping,
Zeeshan Baig

How to Change JDK used by Weblogic Server

2012-05-09T20:39:00.000-05:00

Hi all,

Sometime it is required to switch JDK used by weblogic server for example from Sun to JRockit (which gives better performance). Another use case could be to switch from 32 to 64 bit JDK as well as latest supported JDK. To verify supported JDK version check Oracle FMW support matrix

In this post we will switch JDK from Sun to JRockit and i assume we are on Linux environment find same configuration file name with .CMD extension if you are on windows.

Installing new JDK:

First step is to install your desired JDK. Follow these steps to install

1. Download JRockit JDK from OTN

2. FTP the file to server and unzip it by running following command

$ unzip  jrockit_282V30318-01.zip

3. The file will be extracted with .bin extension, change the permission and make it executable.

$ chmod 755 jrockit-jdk1.6.0_29-R28.2.2-4.1.0-linux-x64.bin

4. Install JRockit to your desired location (in my example i have xserver running).

Follow the wizard to complete the installation. I installed JRockit on /u01/Oracle/jrockit-r28.2.2

$ ./jrockit-jdk1.6.0_29-R28.2.2-4.1.0-linux-x64.bin

Changing Weblogic Configuration to use new JDK

1. Shutdown all managed servers in Weblogic domain

2. Backup the following files

$MW_HOME/user_projects/domains/<domain  name>/bin/setDomainEnv.sh
$WL_HOME/common/bin/commEnv.sh

e.g.
$ cd  /u01/Oracle/Middleware/user_projects/domains/base_domain/bin
$ cp setDomainEnv.sh  setDomainEnv.sh.before_jdk_change

$ cd /u01/Oracle/Middleware/wlserver_10.3/common/bin
$ cp commEnv.sh  commEnv.sh.before_jdk_change

3. Edit setDomain.env file and find ${JAVA_HOME}
Comment the JAVA_HOME entry

#JAVA_HOME="${JAVA_HOME}"
#export  JAVA_HOME

4. Add the following after this

# Added the following lines to change to JRockit JDK
JAVA_HOME="/u01/Oracle/jrockit-r28.2.2"
export  JAVA_HOME
JAVA_VENDOR="Oracle"
export JAVA_VENDOR

5. Search the following section in the file, specifically for "-Djrockit.optfile":

Note: This parameter usually gives warning of being obsolete
you will find

EXTRA_JAVA_PROPERTIES="-Dcommon.components.home=${COMMON_COMPONENTS_HOME}   -Djrf.version=11.1.1  
-Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.Jdk14Logger  
-Ddomain.home=${DOMAIN_HOME}  
-Djrockit.optfile=${COMMON_COMPONENTS_HOME}/modules/oracle.jrf_11.1.1/jrocket_optfile.txt  
-Doracle.server.config.dir=${ORACLE_DOMAIN_CONFIG_DIR}/servers/${SERVER_NAME}  
-Doracle.domain.config.dir=${ORACLE_DOMAIN_CONFIG_DIR} 
......"

remove the "-Djrockit.optfile" property:

-Djrockit.optfile=${COMMON_COMPONENTS_HOME}/modules/oracle.jrf_11.1.1/jrocket_optfile.txt

6. Save the file

7. Edit commEnv.sh file, find the following section


if [ -z "${JAVA_HOME}" -o -z "${JAVA_VENDOR}" ]; then

8. Add the following line after above section

JAVA_HOME="/u01/Oracle/jrockit-r28.2.2"
export JAVA_HOME
JAVA_VENDOR="Oracle"
export JAVA_VENDOR

9. Start Admin Server and confirm your changes by running following command

$ ps -ef | grep Admin

if you see something similar then your are good to start other managed servers


oracle   13927 13771  5 15:30 ?        00:03:58 /u01/Oracle/jrockit-r282.2/bin/java -jrockit -Xms2048m -Xmx2048m -Dweblogic.Name=AdminServer

Hope it help,
Zeeshan Baig

Download Working with Portlets in ADF and Webcenter Presentation

2012-04-30T10:31:00.000-05:00

Hello all,

I am back to home after a great trip to Collaborate 2012 in Las vegas. I am thankful to all people who attended my session. You can now download my presentation and paper from collaborate site as well here.

Working with Portlets in ADF and Webcenter

View more PowerPoint from Zeeshan Baig

Download White paper

I will put the demo videos on my YouTube channel soon and i am hopeful to see you again soon at Kscope 2012 in San Antonio, TX.

Best Regards,
Zeeshan Baig
LinkedIn: http://www.linkedin.com/in/baigzeeshan
Twitter: http://twitter.com/baigsorcl
YouTube: http://www.youtube.com/user/baigsorcl

Join my Session at Collaborate 2012 in Las Vegas

2012-04-05T13:08:00.001-05:00

Greetings,

If you are not aware by chance that i will presenting 1 session at Collaborate 2012 this year in Las Vegas.

Following are the details of the session

#288 - Working with Portlets in ADF and Webcenter

Date:
Monday, April 23
2:30 pm - 3:30 pm

Location:
Surf E

Product Line:
Oracle WebCenter, Framework (ADF)

Track:
Development

Description:
A portlet is a reusable Web component that can draw content from many different sources. Oracle ADF and Webcenter provides a powerful framework to build and integrate portlets into your enterprise portal.

In this session we will demonstrate how to build and deploy portlets using ADF and later integrate into Oracle Webcenter portal. The session will also discuss the general best practices and standards.

http://coll12.mapyourshow.com/5_0/sessions/sessiondetails.cfm?ScheduledSessionID=11ABC7

So come to say hello to me.

See you soon,

Zeeshan Baig

Mail: zeeshan.baig82@gmail.com
Blog: http://baigzeeshan.com

LinkedIn: http://www.linkedin.com/in/baigzeeshan
Twitter: http://twitter.com/baigsorcl
YouTube: http://www.youtube.com/user/baigsorcl

Defining Unique Key Constraints for Non-Primary Key Attributes in ADF-BC

2012-03-09T16:03:00.000-06:00

Greetings,

ADF BC (Business Components) allows you to write code declaratively instead of writing spaghetti code in Java.

One of the feature is Alternate key constraint which is different from Primary and Unique key constraints available in database. Usually Primary key values are coming from database sequence so you don't have to worry about their uniqueness but if you like to validate uniqueness on other columns e.g. email address,Region or Country Name that's where Alternate key comes into action.

Following are some properties of alternate keys:

You can check Uniqueness at record level e.g. Department Name must be unique
You can have many alternate keys as compare to Primary keys
You can look for a row in entity object using findByKey() method
If the key is found in entity objects ADF will throw TooManyObjectsException

Lets look into example (Download the complete example)

Use case:
Database schema: HR @ Oracle XE

Column Country name must be unique in Countries table. We have primary key CountryId in the table as shown in the slide

Solution:

Create an Alternate key constraint on Entity object.
Add Unique Key validation on Entity Object using alternate Key

Creating Alternate Key:

Right click the Entity Object and Choose "New Entity Constraint"

Enter the name of the constraint, Enter the Attribute where you want to add constraint in our case select Country Name

You can verify the Alternate key constraint Under general tab of entity object properties

Creating Unique Validation:

Go to Business Rules tab in Entity Object properties and Click Create New Validation by selecting "Entity Validators" as shown in the slide

Select "Unique Key" from Rule Type list. Select the Alternate key constraint from Keys

Go to Failure tab and Enter custom error message

Run the Application Module, Create new Record and Enter Unique country name like Brazil, You would see the similar error message.

Also on JSF page you would see error message on Commit

Happy JDeveloping,
Zeeshan Baig

LinkedIn: http://www.linkedin.com/in/baigzeeshan

Twitter: http://twitter.com/baigsorcl
YouTube: http://www.youtube.com/user/baigsorcl

Using Programmatic Validation in ADFBC

2012-03-02T11:17:00.001-06:00

Greetings,

This month of March i will be focusing on ADF business components. So first entry in this series is how to write programmatic validations for entities in ADF business components.

I have covered a similar concept using ADF Domain types which gives us global validation control instead of writing code for specific entities.

As you might be familiar that ADF BC provides facility to write validations in declarative manner but sometimes the use case is complex for that you can write programmatic validations as follows

1. Add a method that will do validation in EntityImpl.java class
2. Call that method as part of validation cycle in validateEntity() method which is called at commit time when any attribute has been updated.

Let's get into detail

In this example use case (Download the example)

Our business rule says that all email address should be first letter of First name and full Last name of the employee

e.g. If the name is Zeeshan Baig then email address should be ZBAIG

1. Generate EntityImpl java class by double clicking on entity, go to Java tab and click on the pencil button choose generate employeeImpl class and click OK as shown in the slide

2. Write your custom method that will perform validation. In our use case is as follows

    public boolean checkValidEmail() {
        //Email must be first letter of First name and Full last name of employee
        //e.g Zeeshan Baig should be entered as zbaig
        String validEmailRule = this.getFirstName().substring(0,1) + this.getLastName();      

        if (getEmail().compareToIgnoreCase(validEmailRule) == 0 && getEmail() != null) {
            return true;
        } else {
            return false;
        }
    }

3. Override validateEntity() method but clicking override button enter text validate, select method and click OK

4. Override the code of validateEntity() method as follows

    protected void validateEntity() {
        if (!checkValidEmail()) {
            throw new JboException("Email Address should start with First letter of First Name and Complete Last Name.");
        }
        super.validateEntity();
    }

5. Compile the class and Run Application module to test in ADF business component browser

6. Enter wrong email address and click Validate Button to test you should receive Error alert

7. Enter valid email as per the rule and click Validate No alerts should come click Commit you should be able to see the successful commit message in the log

Happy JDeveloping,

Zeeshan Baig

LinkedIn: http://www.linkedin.com/in/baigzeeshan

Twitter: http://twitter.com/baigsorcl
YouTube: http://www.youtube.com/user/baigsorcl

How to Change Database Schema Password For Oracle Content Server

2012-02-22T10:28:00.004-06:00

Hi,

Sometimes it is required to recover forgotten password of Oracle Content Server repository.

The purpose of this post is to identify where you are required to do changes if you are going to reset content repository database account password.

Usually the database schema owner of Oracle content server is <Your-Prefix>_OCS if your prefix during installation was DEV then username in database will be DEV_OCS.

Your DBA changed the password using following command

alter user DEV_OCS identified by newPassword;

Change In Weblogic Console:

1. Open Weblogic Admin console by following URL

http://mysername:myport/console
e.g http://myserver:7001/console

2. Go to Services > JDBC > Data Sources > CSDS > Configuration > Connection Pool

3. Enter new password and Press Save as shown

4. Weblogic will ask you to restart the data source, follow as shown in the slide

Change Password in Content Server Configuration:

To change password in Linux environment you need X-Windows / VNC or Login to Box using Tools like Reflections

1. Go to your content-server domain directory as follows

/u01/Oracle/Middleware/user_projects/domains/myDomain/ucm/cs/bin/

2. Run SystemProperties file

$ ./SystemProperties

3. A properties window will appear. Go to Database tab and change the password and hit OK

The changes will propogate out to the config.cfg file restart content server if required.

Hope this will help,
Zeeshan Baig

Blog: http://baigzeeshan.com

LinkedIn: http://www.linkedin.com/in/baigzeeshan
Twitter: http://twitter.com/baigsorcl
YouTube: http://www.youtube.com/user/baigsorcl

How to set Different JVM Heap Sizes for Admin and Managed Servers in Weblogic

2012-01-06T11:43:00.004-06:00

Hi,

As per performance tuning guidelines it is good practice to start your Admin server with lower JVM heap size than your other managed servers because the Admin server doesn't required much resources.
By doing this you can utilize the free memory with others where it is needed (This makes sense when you are running Admin and Managed servers on same host)

Problem:
As i mentioned above our requirement is to use different JVM heapsize for Adminserver and only specific webcenter WLS_Spaces servers of a cluster.

One way to change the heap size is to set in weblogic admin console click here

In the example i will set JVM heap size -Xms and -Xmx values to1MB for AdminServer and 2MB each for WLS_Spaces managed servers of a cluster.

Solution:

1. Shutdown Admin and Managed servers

2. Add the following line of code in setDomain.env file. you can find the file under bin directory of weblogic domain home

Make sure you add these lines at-least after "export XMX_JROCKIT_32BIT" so it will override any other default settings.

e.g. /u01/Oracle/Middleware/user_projects/domains/myDomain/bin

# Set 1024MB for AdminServer

if [ "${SERVER_NAME}" == "AdminServer" ] ; then
      USER_MEM_ARGS="-Xms1024m -Xmx1024m"
    export USER_MEM_ARGS
fi

#Set 2MB if server name contains WLS_Spaces ( it will cover WLS_Spaces1,2,3,4..)

if [[ "${SERVER_NAME}" == *WLS_Spaces* ]] ; then
    USER_MEM_ARGS="-Xms2048m -Xmx2048m"
    export USER_MEM_ARGS
fi

3. Start Adminserver to verify if your change is working (if ok then start all others)

4. Verify by check the JVM heapsize using Jrockit mission control or Linux process
e.g. $ ps -ef|grep AdminServer

Have a nice day,
Zeeshan Baig

Twitter: http://twitter.com/baigsorcl

YouTube: http://www.youtube.com/baigsorcl

Oracle ADF - Storing temporary values in PageFlowScope created at Run time

2011-12-28T15:09:00.002-06:00

Greetings,

Some time you need to store temporary values on the page like a global variable. Oracle ADF provides various bean scopes like pageflow scope, session scope etc etc we can definitely use them

But can you create pageflow scope at run-time? the answer is YES

Lets explore a simple example

Example:
When you press the button on the screen it will count and display how many times you have pressed the button and counter will be different for each browser window or tab

Technical detail:

We have an input text component and its value using a page flow scope bean attribute called 'counter'
We got a button on screen which is calling an action listener method doCounting()

How Example works:

When we pressed the button on screen it creates a pageflow scope bean on runtime called 'myCounter' and increment this value on every button pressed.
The value of myCounter then assigned to pageFlowscope attribute in a managed bean called 'counter' which is visible on screen as output text

Following is the code on button with other helping methods

    //Method on the button
    public void doCounting(ActionEvent actionEvent) {
      
        Number value = (Number)getPageFlowScopeValue("myCounter");
        if (value.intValue() >= 0) {
            setPageFlowScopeValue("myCounter", value.intValue() + 1);
        }
        
        setManagedBeanValue("pageFlowScope.pFlowBean.counter",getPageFlowScopeValue("myCounter"));

    }
    //Method to set the value of page flow scope created on runtime
    public void setPageFlowScopeValue(String name, Number value) {
        ADFContext adfCtx = ADFContext.getCurrent();
        Map pageFlowScope = adfCtx.getPageFlowScope();
        pageFlowScope.put(name, value);
    }

   //method to get the value of page flow scope created on runtime
    public Object getPageFlowScopeValue(String name) {
        ADFContext adfCtx = ADFContext.getCurrent();
        Map pageFlowScope = adfCtx.getPageFlowScope();
        Object val = pageFlowScope.get(name);
    
        if (val == null)
            return 0;
        else
            return val;
    }

   //Methods used to get and set the values in a Managed bean
    public Object getManagedBeanValue(String beanName) {
        StringBuffer buff = new StringBuffer("#{");
        buff.append(beanName);
        buff.append("}");
        return resolveExpression(buff.toString());
    }

    public Object resolveExpression(String expression) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        Application app = facesContext.getApplication();
        ExpressionFactory elFactory = app.getExpressionFactory();
        ELContext elContext = facesContext.getELContext();
        ValueExpression valueExp = elFactory.createValueExpression(elContext, expression, Object.class);
        return valueExp.getValue(elContext);
    }

  
    public void setManagedBeanValue(String beanName, Object newValue) {
        StringBuffer buff = new StringBuffer("#{");
        buff.append(beanName);
        buff.append("}");
        setExpressionValue(buff.toString(), newValue);
    }

    public static void setExpressionValue(String expression, Object newValue) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        Application app = facesContext.getApplication();
        ExpressionFactory elFactory = app.getExpressionFactory();
        ELContext elContext = facesContext.getELContext();
        ValueExpression valueExp = elFactory.createValueExpression(elContext, expression, Object.class);
     
        Class bindClass = valueExp.getType(elContext);
        if (bindClass.isPrimitive() || bindClass.isInstance(newValue)) {
            valueExp.setValue(elContext, newValue);
        }
    }

Download the sample code

Note: There are many ways to do the same task one technique is demonstrated by Andrejus click here

Have a nice day,
Zeeshan Baig

Slide and Sample - ADF Task Flows for Beginners

2011-12-15T15:44:00.002-06:00

Greetings,

Thank you for joining my webinar. Download the slide and demo used in my presentation.

Oracle ADF Task Flows for Beginners

View more presentations from Zeeshan Baig

ADF task flow webinar details - Repost

2011-12-13T10:07:00.001-06:00

Hi,

I appreciate for all your amazing support for this session even i had to rescheduled it due to emergency.

This Thursday the show must go on.....

Here are the details i will cover much more than the description

December 15, 2011 3:00 PM - 4:00 PM EST
ADF Task Flows for Beginners
Zeeshan Baig

ADF Task flow is most important and essential feature of ADF development which makes ADF unique in the battle of frameworks. This session will help you to understand different components and techniques to build task flows as well as building static and dynamic regions on JSF pages.

During this session we will dive into the following:

1. Understanding different components to build task flows.
2. Building task flows templates.
3. Building static and dynamic regions.
4. Basic techniques to build reusable task flows.

Registration Web Link: https://www3.gotomeeting.com/register/133729022

Today's webinar is rescheduled to December 15, 2011

2011-12-01T10:21:00.001-06:00

Hi,

Due to some emergency we have rescheduled the webinar which was going to held today at 2 PM CST to December 15, 2011 to same time.

More info will post soon.

Zeeshan Baig

How to Play / Embed Flash .swf file in Oracle ADF application

2011-11-17T10:26:00.001-06:00

Greetings,

I got this questions couple of times so i decided to write another quicky here. You can play flash in 2 ways

Using af:inlineFrame component
Using af:media component

As an example we have .swf file in your imgs folder as shown in the slide

The difference would be af:inlineFrame will show the flash on page

af:media will display it as a link (unless you have a video as source) clicking on the link will open flash file

The output would be similar as follows

Have a nice day,
Zeeshan Baig

Book Review: Oracle Weblogic Server 11g Administration Handbook By Sam Alapati

2011-11-15T10:50:00.000-06:00

Greetings,

Here is my first book review Oracle Weblogic Server 11g Administration Handbook by Sam R. Alapati.

Where to get the book:
You can buy the book from following suppliers

Introduction:
Oracle Weblogic Server is a huge subject and this book covers a lot about it from installation, configuration, managing, deployment to securing topics.

Book is almost 500 pages and has lot of detailed topic and sometimes it overwhelm the reader but that is the requirement of the handbook it has be to be in detailed.

Structure of the book:
Topics are mostly explained in detail first then provided step by step instructions to configure with screen shots.

Chapter wise Review:

Chapter 1: Installing Weblogic Server and using Management Tools
First chapter will take you through a journey with weblogic terminologies then installation, un-installation, re-instillation, upgrade of the product later it touches different sections of weblogic administrator console as well as using WLST (Weblogic scripting tool).

Chapter 2: Administering Weblogic Server Instances
This chapter starts with setting up weblogic environment, node manager configuration including how to setup node manager to run as windows service was a treat. The real deal of this chapter is it covers various ways to start and stop weblogic server instances in a great detail.

Chapter 3: Creating and Configuring Weblogic Server Domains
As title said this chapter covers creating and configuration of weblogic server domains. Author showed us various techniques to create a domain templates using command line as well as GUI covering Admin, Managed Servers with clustering. Later part of the chapter explains about configuring the environment including persistent store, HTTP server, weblogic proxy plug-in, virtual host and backing up the domain.

Chapter 4: Configuring Naming, Connections, Transactions and Messaging
With this chapter you moved into the day to day practical stuff for weblogic. Chapter covers JNDI, directory, data sources, JMS and java mail configurations.

Chapter 5: Configuring Weblogic Server Environment
This chapter touches topics with thread management and work managers mostly used for load distribution in weblogic environment.

Chapter 6: Monitoring and Troubleshooting Weblogic Server
This chapter explains through different diagnostic options weblogic provides, It covers JRockit flight control and new weblogic monitoring dashboard console. Later part of the expert explain troubleshooting with weblogic administration console, logging, thread and memory management.

Chapter 7: Working with Weblogic Server Clusters
Weblogic clusters is the most important feature for real world projects and this chapter did a justice with it, as the title says it covers the clusters architectures, configuration, deployments and management. later part of the chapter covers weblogic load balancing and failover capabilities

Chapter 8: Understanding Weblogic Server Application Deployment
This chapter covers application deployments starts with application types. deployment tools like weblogic.Deployer, Admin console, WLST, wldeploy Ant. The chapter also covers the deployment plans and monitoring applications as well.

Chapter 9: Managing Weblogic Server Security
Weblogic security is a deep sea and with this chapter get ready to take a scuba dive. Chapter covers from basic info to security realm, providers, users, groups, roles, policies and at the end author explain in detail configuring SSL to trust between different weblogic domains and chapter ends with weblogic best practices.

Chapter 10: Weblogic Server Performance Tuning
The book ends with the encore weblogic performance tuning in detail like thread management, JVMs, garbage collections, persistent stores, JDBC datasource pools, JMS and little intro about Oracle Coherence.

About the Author:
Sam R. Alapati is an Oracle ACE and has written many books on Oracle technologies on different topics and have many years of experience in the industry. He blogs at http://www.miroconsulting.com/blog/ and have twitter account http://twitter.com/miroconsulting

Final Thoughts:
I think the book shares a valuable knowledge for professional who wants to get in to weblogic server admin chair as well as consultants, developer who likes to get familiar with typical concepts of weblogic world.

I have this is in my shelf and this book helped me to tune my current weblogic environment and i definitely this a recommend read and i hope you will get this too

Have a nice day,

Zeeshan Baig

How to Right Align Column Data in af:table Footer

2011-11-12T10:44:00.001-06:00

Hi,

Problem:

When you display any data in footer facet of af:column (or af:table) in af:table by default the data aligns to left even you set the af:column align property to right as shown in the following slide.

Solution:

Solution is simple all you need is to wrap your data with af:panelgrouplayout

set Halign = "right"
layout="horizontal"

The output would be similar as shown in the slide