Monday, June 22, 2015

Presentation: Cloud Computing Basics

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I presented an internal training on Cloud Computing recently at AST Corporation. Following is my slides from the session. I covered basics of cloud computing and some products that Oracle Corporation offers. I also expanded on some of the cloud benefits.

Hope you get something out of it. Feel free to share the post and comment what you would like to see from me in future sessions.

Cloud Computing Basics from Zeeshan Baig

Zeeeshan Baig

Tuesday, May 12, 2015

Oracle XE 11g 64 bit TNS Listener and Network Adapter Issue on Windows 7

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I have installed Oracle XE database on many machines and this seems to be a bug as I found which have to fix it manually on windows 7. I am not sure about if the problem exists on other platforms.


After install oracle XE everything is working as expected but once you restart your machine or database you cannot connect to it using TNS. Direct connection works but not when LISTENER is involved.

You might see following exceptions when connecting to database

IO Error: The Network Adapter could not establish the connection

ORA-12514: TNS:listener does not currently know of service requested in connect descriptor

For example look at the following slide

Connecting using SQL Command Line with and without using TNS


All you need to add XE database information to the LISTNER.ORA file typically found at C:\oraclexe\app\oracle\product\11.2.0\server\network\ADMIN

1. Add the XE database information to LISTENER.ORA file (Highlighted entries)

2. Restart the Listener from Services

Zeeshan Baig 

Monday, May 11, 2015

Webinar: Getting Started with Web Services

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Last week I presented an Internal training session at AST Corporation. I thought It would be cool to share it with you all as well.

Following was the abstract of the session.

Web services are common way to communicate between applications regardless of languages or platform your application is developed. Therefore, understanding of Web services is a critical skill. In this session we will go through the basics foundation of what web services are and how you can create, utilize, and secure them.

Topics Include:
1. What is a web service?
2. Understanding of transfer protocols and message formats
3. Understanding different types of Web services
4. Creating basic web services
5. Available tools
6. Security

Presenter: Zeeshan Baig

Zeeshan Baig

Wednesday, April 15, 2015

Re-using SOA Composites using Templates

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Previously in SOA Suite reusing composites were quite a challenge. I recently encountered this requirement and thanks to new feature in SOA Suite 12c release now we can create templates on SOA Projects, Service Components and Custom BPEL scope activity.

In this post I will cover creating SOA Composite based on a template.

As an example I have a composite including BPEL process which is generating a report from  BI Publisher. The process includes assigning input parameters to web service.

Creating a Template:

Template creation is simple as it could be. Simply right click the SOA Composite or SOA Project and Choose Create SOA Template

Next you can select what components you want to include in your template.

Reusing Template:

Whenever you will create a new SOA Project you will see a new option called SOA Template simply select the template you have created earlier OR click the Green + sign to add templates stored at other location

There you go a new project based on template has been created

Reference :
39 Oracle SOA Suite Templates and Reusable Subprocesses

SOA Suite

Zeeshan Baig

Monday, March 24, 2014

Packt 2000th book Campaign - Some cool offers

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I love reading technical books by Packt Publishing. The cool thing about them their books are TO THE POINT and gives you enough content to understands the concepts and gets going.

I recently found that Packt Publishing is celebrating their 2000th book title and offering "BUY ONE AND GET ONE FREE" on all e-books.

You cannot miss thing opportunity click the Image or link to grab the offer

I will start posting some cool stuff soon.

Zeeshan Baig

Wednesday, October 30, 2013

Resolving " Class not Found" Exception

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Last week one of my customer reported that they are getting

'' Class not Found 

exception in Weblogic environment. They recently applied a patch and after servers are coming up but most of the applications or deployments were in 'Prepared' state. If you try to start them in Weblogic console you will receive the above error.


StartScriptEnabled property in file was set to 'false'. This must set to 'true' if you are going to start your managed servers using Weblogic console.


Simple change the StartScriptEnabled=true in file which is usually at WL_HOME/common/nodemanager/ in my case /opt/ora/idm/middleware/wlserver_10.3/common/nodemanager

Restart the managed server using weblogic console

Note: You might not get this issue if you always start servers using command line. 

Have a nice day,