Armaghan

Useful SQL Queries

2009-10-28T19:56:53Z

You might find the following queries quite handy for your day to day SQL operations:

1. Get the total number of records in a table:

SELECT COUNT(*) FROM TABLE_NAME;

SQL User queries in Oracle

2009-10-28T15:16:47Z

Here are a few useful user SQL code snippets in Oracle:

1. To create a user

CREATE USER username
IDENTIFIED BY password
DEFAULT TABLESPACE USERS
TEMPORARY TABLESPACE TEMP;

2. Grant user privileges:

GRANT CONNECT, RESOURCE, CREATE SESSION, CREATE VIEW TO username;

3. Grant all privileges:

GRANT all privileges TO username;

4. Delete a user or to delete a user and the associated user schema

drop user username cascade;

SQL : Get a list of tables,views and sequences for a given user

2009-10-09T20:02:35Z

This SQL Snippet get a list of all the tables under a user:

select * from user_objects where object_type = 'TABLE';

This SQL Snippet will get you a list of all the sequences in a DB Schema for the user tables

select * from user_sequences

This SQL Snippet will get you a list of all the view in a DB Schema for the user tables

select * from user_views;

Happy Coding :)

Finding out the Oracle Version using SQL

2009-10-05T15:00:16Z

If you ever have to find out the version of Oracle using SQL, use the following SQL command and it will spit out all the details.

SQL
SELECT * FROM V$VERSION;

OUTPUT

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0    Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
----------------------------------------------------------------

Happy Coding :)

Changing the default port number in Apache Tomcat

2009-09-11T13:25:26Z

I had to run two webservers on my machine at the same time. Since both of them used port 8080 , the easiest way to run the two servers at the same time was to modify the port number on one of them.

Here is how we can change the port number in Apache Tomcat:

1. Navigate to : Apache Software Foundation\Tomcat X.X\conf

2. Modify the Server.xml file:

Modify this to another non-conflicting port ( I changed it to 8888)

Happy Coding

XML Manipulation in Flex and ActionScript

2009-08-28T18:03:18Z

There are lots of crazy ways of manipulating XML in ActionScript.Here are a few simple tips and tricks on manipulating XML in Actionscript.

Declaring an XML Variable: An XML variable can be created in ActionScript as follows :

                 var tempSearchXML:XML =
                                              023






2. Preview an XML Variable : An XML variable can be previewed in an Alert Box by converting the XML to a string object

            Alert.show(tempSearchXML.toString());

3. Getting the value of a Node in the XML:

           Alert.show(tempSearchXML.branchName.toString());

4. Setting the Value of Node in the XML : The following code sets the value of a node 'contfirstname '.

            tempSearchXML.contfirstname ="Armaghan";

5. Setting / Changing / Updating the Node Attribute in the XML: The following code snippet changes the name of a Node from 'contlastname' to 'lastname'.

            tempSearchXML.contlastname.setName("lastname") ;

5. Delete a Node in the XML: The following code snippet deletes a Node called 'contphone' in the XML.

            delete tempSearchXML.contphone;

6. Adding a Node in the XML: The following code snippet adds a Node called 'text' in the XML and sets its value at the same time.

            tempSearchXML.text ="Taylor" ;

Happy Coding :)

Dump the Ant build information to a log file

2009-08-10T20:18:56Z

If you ever need to dump the build information from the command prompt console into a log file, just add a -logfile .log parameter after your build file call in the command prompt console and you're good to go.

Happy Coding :)

Default Value in QueryParam Annotations

2009-08-07T14:37:11Z

In order to remove any null pointer exceptions while using RestEasy Annotations, you can always pass a default value and handle it appropriately in the Data Access Objects ( If you are using one. This ensures that there are no null pointer excpetions from the returning classes.

Here is a code snippet to do just this:

public StreamingOutput getUsersSummaryList(@QueryParam("active") @DefaultValue("0") String active ){}

PermGen space error (Hibernate, JPA)

2009-08-07T14:27:28Z

If you ever come across a PerGen space error in Hibernate or JPA...it refers to the java.lang.outfspacememoryerror (Your webapp is out of memory). PermGen is used to store the class definations ( and I do mean all the Loaded Classes ). This error refers to the heap space being full due to the large number of classes.

Generally you can recover from these errors by restarting your WebServer. If you want to really fix it, do one of the following 2:

1. Hibernate: Change the hibernate.properties file from "hibernate.bytecode.provider javassist" to hibernate.bytecode.provider cglib".

2. JPA: Change the persistance.xml file from to

Happy Coding :)

Forget Tour De France.....Make way for Tour De LiveCycle

2009-05-27T02:13:28Z

Now all you LiveCycle documentation hunters can look at a single location to find all LiveCycle related information....on your desktop...thats right...and its actually true.

Adobe released Tour De LiveCycle yesterday, a comprehensive AIR app that locks all aspects of LiveCycle documentation on your desktop. It will remind you of Flex explorer in its look and feel but encompasses videos, presentations, tutorials and hands on examples on all aspects of livecycle (Data services, BAM, Workbench etc) .

It can be downloaded here:

Working with Rich Text Fields in LiveCycle ES

2009-05-20T17:48:30Z

I have been struggling with data manipulation with rich text fields for a while. For those who aren't familiar with rich text fields in LiveCycle, they are simple text fields with the data format = XHTML.

This allows the text field (text area) to work like Microsoft word. The end user is able to edit the text, make it bold, underline it, hyperlink web addresses etc etc.

In my case, i had to concatenate 2 pieces of rich text fields into a rich text area. The usual rawValue and formattedValue XFA properties loose the formatting if used for rich text areas.

I have attached a sample XDP that shows you how to do it "properly".

Armaghan.
RichTextCopyExample.xdp

Remote Debugging Using Eclipse, Netbeans, Tomcat

2009-05-01T20:29:31Z

For the regular J2EE/Java programmers that use the amazing Tomcat as their Servlet container, i found an amazing link. It steps through the necessary configurations to debug your servlets....an awesome find :)

http://wiki.apache.org/tomcat/FAQ/Developing

Share what you learn...and Happy Coding :)

Versioning in LiveCycle ES

2009-05-01T03:30:05Z

Time to bust a myth. I'll call it LiveCycle Myth 101.1

While working on a process orchestration today in a truly team oriented setup, we were working on a single version of a process in bits and pieces. Great progress was made, happy hour came early to work today but then someone saved had an older copy of the process open on their computer...and they decided to save it........the horror....the pain......but wait, this is livecycle we are talking about....its smart...its fancy....it must have stored the previous copy we were working with in the database...it must have...

So we went ahead with our quest for the old process, tore apart the database....and found the table that contains the process orchestrations. We found our process....the jubilant team roared, the happy hour was back....and then we diffed the copy from the database with an exported copy of the process....and it went quiet in the room....it was the same process XML.

Moral of the story:
Keep a backup of the current version, LiveCycle will not save the day everyday, sometimes it takes regular good old common sense. Export a copy of your work and save it in the SVN or better yet, create a new version of the process everytime you reach a milestone. This way, the database will save each version of the process!

Share what you learn...and Happy Coding :)

Native Drag and Drop with Adobe Air

2009-04-29T23:45:25Z

I came across a good article for native drag and drop support in Air apps. Thought i'd re-share it with the world :)

Native drag and drop link

Share what you learn....Happy Coding :)

Remote Debugging Using Flex Builder IDE

2009-04-29T14:17:28Z

About a year ago, i came across the wonderful world of remote debugging and was surprised to find such a powerful feature within Flex Builder. I have been using it since then for every project. I have listed a step by step guide on how to configure your Flex IDE to use remote debugging.

Its important to note that if you have exported the project as a release to the remote site, this approach will not work(for the obvious release that its no longer a dev project). To use remote debugging, developers like myself just copy the contents of the bin folder and use these files for remote debugging.

Initially,I had a painful experience finding an article on Remote Debugging with Flex 3. Here's some free advice in a few time saving steps:

1. Copy your project to a remote site (In my case: http://myDevServer:9080/myRemoteApp). You should copy the files out directly from the Bin folder of your project as mentioned above.

2. In Flex Builder 3, navigate to Run > Debug > Other... or click on that bug icon and click on other.

3. In the Create, Manage and Run Configurations dialog that just opened up, either create a new configuration or keep the one that just opened up for you ( I'm assuming you were debugging the app locally on your PC before you decided to run remote debugging).

4. In the URL or Path to Launch section, uncheck the Use defaults checkbox.

5. In the debug, run and profile fields, add the location of the html file hosted on the remote server( Developers tend to point these to the swf file, it doesn't work that way).
e.g., http://myDevServer:9080/myRemoteApp/index.html

6. Click on the apply button,close your eyes and click the debug button to start debugging your remote application.

Share with you learn...and Happy Coding :)