Arup's Exceptional

[Free] Servoy Image Viewer Module

2008-11-25T13:17:00.002+05:30

Hi,

I have developed a "Servoy Image Viewer Module" to view the uploaded image. The module has the option to flip, zoom, rotate, upload, save the image.

Here is the preview of the "Servoy Image Viewer Module" in Rich Client.

This module can be used in 3.5 + and 4.0 +.and is Rich & WebClient compatible. Please, feel free to use, modify & distrubute as per your want.

The Module can be downloaded form the original post from the Servoy Forum.
http://www.servoy.com/forum/viewtopic.php?f=14&t=11627

Cheers.

Checking Performance Issue in Servoy

2008-11-19T18:51:00.005+05:30

By the help of Debugging, we can make our code bug free, but it can't help us for checking performance issue which may creep into our code and Servoy does't offer any such tool to check or monitor these issues, such as which Servoy method called, and how many time it takes to finish the code etc.

Yes, a simple checking can be done by adding a timestamp at the method start and end.

Here is a nice solution for your above issue, suggested by Greg Pierce of Agile Tortoise. It requires no changes to your original code to track the timestamps, etc.

function profile_global_method()
{
var orig = arguments[0]; //Method name to test the performance
var newName = orig + '_orig';

if(typeof globals[newName] == 'function')
globals[orig] = globals[newName];
globals[newName] = globals[orig];

var pStart;
var before = function() { pStart = new Date(); };
var after = function() { application.output(orig + ":" + (new Date() - pStart)); };

var repl = function() {
switch(typeof before)
{
case 'string' : eval(before); break;
case 'function' : before(); break;
}
var result = globals[newName].apply(this, arguments);
switch(typeof after)
{
case 'string' : eval(after); break;
case 'function' : after(); break;
}
return result;
}
globals[orig] = repl;
}

You can profile your global method for performance testing by using the profile_global_method() and passing the method name as an argument. Now, you can call your method from somewhere else, typically in an "enter profiler mode" method somewhere that will call it repeated for the different methods you want to watch. It aliases the original global method in the runtime and replaces it with a version that tracks profiling ticks and outputs them to the console. No further modifications to your original code are required. Now, every time the method is called you can able to get the time consumed by the method like “methodName:[ticks]” in milliseconds. No, you can track the execution time into the db or keep counting the number of times the particular methods are called.

to Greg Pierce of Agile Tortoise for the same.

Here is an improved version which, now, can able to figure out the start, end and count of the method.

function profile_global_method()
{
var orig = arguments[0];
var newName = orig + '_orig';

if(typeof globals[newName] == 'function') globals[orig] = globals[newName];
globals[newName] = globals[orig];

if(typeof $profileData == 'undefined') $profileData = { };
if(typeof $profileData[orig] == 'undefined') $profileData[orig] = {count:0, lastStart:null, lastEnd:null, ticks:0};

var before = function() {
$profileData[orig].count = $profileData[orig].count + 1;
$profileData[orig].lastStart = new Date();
application.output("START | globals." + orig + " | count: " + $profileData[orig].count);
};
var after = function() {
$profileData[orig].lastEnd = new Date();
$profileData[orig].ticks = $profileData[orig].lastEnd - $profileData[orig].lastStart;
application.output('END | globals.' + orig + " | count: " + $profileData[orig].count + ", ticks: " + $profileData[orig].ticks);
};

var repl = function() {
before();
var result = globals[newName].apply(this, arguments);
after();
return result;
}
globals[orig] = repl;
}

SERVOY 4.1 PreRelease : DONE !!

2008-10-08T10:41:00.005+05:30

Yes,

Servoy 4.1 PreRelease version is on your hand now, with lots of fixes and enhancements and in addition to these with a new revolutionary change called, "Solution Model".

With this PreRelease of Servoy 4.1, you can now able to see a node "SolutionModel" just below to the Application node. SolutionModel node gives you the capability to change or create new form & form objects such as forms, fields, labels, buttons, and tabpanels (portals coming in b2) on the FLY. yes, at the runtime....

and the most important and surprising thing is...... You can have this with your WebClient also. Yes, You can change or create new form & form objects on the fly in your WebClient also.

You can add whatever or any number of controls to your form or a newly created form. For the first time, you can now able to change any of the properties on objects , even the data binding on any object at runtime. You can also able to add/change parts of a form at runtime.

Isn't it a revolutionary change in Servoy ??

NOTE :-

You can only change the properties of an object on a form that is not currently visible;
The changes only persist as long as the client session does. So if you want to keep the changes between sessions - you need to code your solution to restore the changes the user made.

Just looking at to the SolutionModel node....

Let you want to change the style class of the form on the fly(on the runtime) :

//Get the form that you want to change the Style Class
var form = solutionModel.getForm("formName");

//Change the StyleClass
form.styleClass = "newStyleClass"

Let you want to add a new button to a newly created form :

//Get the Form
var newForm = solutionModel.newForm("frm", controller.getServerName(), controller.getTableName(), "svy_Cherry", true, 200, 200);

//Add a button to the newly created Form
newForm.newButton("showForm",100,100, 80,20,showForm);

//Show the newly crated form
forms['frm'].controller.show();

NOTE :- this is PRE-RELEASE software - so make sure to back up your databases and workspace before trying it out.

[FREE] 3-State Check Box Bean for Servoy

2008-10-06T17:28:00.004+05:30

The 3-State Check Box Bean has the three states called, "NOT_SELECTED", "CHECKED", "CROSSED". You can get/set the state by using the state property of the bean.

To Get the State :

var state = elements.bn_triState.state

To Set the State :

//Set to Checked
elements.bn_triState.state = "CHECKED";

//Set to Not Selected
elements.bn_triState.state = "NOT_SELECTED";

//Set to Crossed
elements.bn_triState.state = "CROSSED";

I have posted the bean at Servoy Forum. Please check at here.

Record Plugin is at Servoy Newsletter October 2008

2008-10-06T12:40:00.003+05:30

My Record Plug-in for Servoy, "mfRecordPro" has been added to the "Servoy Newsletter October 2008" :) :)

Check the Newsletter at here. Check for "FREE: New Third-party Servoy Training Tools" heading.

[FREE] Record Plugin for SERVOY - "mfRecordPro 1.2" Released

2008-10-06T12:28:00.003+05:30

Record Plugin-in "mfRecordPro 1.2" released.

Version 1.2 includes the possibility to control the playback sound level, pause & resume recording, play an External File and can merge previously recorded audio etc.

Check out the change history at here.

The plug-in & sample Servoy solution can be downloaded at here.

Happy Recording :) :)

SaaS -- TO -- PaaS Powered

2008-10-03T18:15:00.005+05:30

YES,

With the upcoming release of Servoy 4.1, you can have your application PaaS(Platform as a Service) powered. Now, you can allow users or developers at the client side to develop & deploy the User Interface, Data & Business Logic according to the need just right from your own application. Isn't it Great ???

According to the Tech person : "In 4.1 we allow you to create objects (any type) on-the-fly, bind them to data and present them to a user. You can do this both with our Smart Client and with our Web Client, again from the same code-base!"

Curious to see live in action...

LOCK-OUT your source code from decompilation

2008-09-25T12:49:00.007+05:30

Unlike C, C++ & Pascal, Java uses a different approach to compilation. Java don't compile to machine code, compile into intermediate code(byte code). That's why your Java byte code (.class or .jar) file contains much more information of your Java Source file, leaving exposed to reading the code or decompilation. To conceal your code from others, you can use any Java Obfuscator. Obfuscated code is very hard to read and understand. Obfuscating code to prevent reverse engineering(decompilation) is typically done to manage risks that stem from unauthorized access to source code.These risks include loss of intellectual property, ease of probing for application vulnerabilities and loss of revenue that can result when applications are reverse engineered, modified to circumvent metering or usage control and then recompiled. Obfuscating code is, therefore, also a compensating control to manage these risks. Obfuscators also be used to compact object code or interpreted code without affecting its behaviour. A good one I found is RetoGuard.

RetoGuard is very easy to install & use and fully documented. RetroGuard comes up with three flavors of license.

Commercial(annual license and support agreement ) : If you are going to use RetroGuard commercially.
Academic/Not-For-Profit(non-commercial license) : If you are going to use RetroGuard for Academic or not for profit purpose.
Open Source(GNU General Public License) : If you are going to use RetroGuard for your Open Sourced Projects.

Using RetroGuard

Download RetroGuard from the download section and add the retroguard.jar file to your classpath. Package your entire package directory into jar by using the jar command or you can use any editor to do the same.

The command for running RetroGuard is of form

java RetroGuard [INPUT-JAR [OUTPUT-JAR [SCRIPT [LOGFILE]]]]

For simply, you can use

java -jar retroguard.jar input.jar output.jar

input.jar : jar to be obfuscated.
output.jar : output jar

Note : You can specify the classes not to obfuscate by adding entries to the script file. Bydefault(if you don't specify your script file) RetroGuard will preserve applications, applets, serializable classes, and RMI remote classes from obfuscation.

If your Jar requires other libraries to access they are must be available in classpath while running RetroGuard. Let your source jar is "input.jar" and you want allow access the class "mainClass" which lives in input.jar and has the package structure "com.test" and your jar depends upon the external library "extLib.jar" and will be output to "output.jar", then a suitable command for running RetroGuard will be :

java -classpath retroguard.jar;extLib.jar RetroGuard input.jar output.jar script.rgs

script.rgs is a simple text file which should contain the entry ".class com.test.mainClass public method"(without quote).

For the detail information, please check the RetroGuard documentation.

Customize your Exception Handler in Servoy

2008-09-23T17:59:00.008+05:30

Whenever, Servoy encounters any error, it throws the Exception with the message. To add your own customized message, which will be more user friendly, you can attach an Exception handler to your solution.

Exception Handler is just a Global Method which will be get fired automatically, whenever servoy encounters any error and the Exception will be passed to the method as an argument. You can add the Exception handler to your Solution by setting the global method(Exception handler) to the onError event of the solution.

[Servoy 3.1+ & 3.5+]
Open the Solution -> Go to File menu -> Solution Settings -> Select the Global Method from the On error method drop down.

[Servoy 4.0+]

Select the solution -> Go to Properties Tab -> select the Global Method to the onError event.

Here is the sample code snippet, that you can add to your Global Method(Exception Handler) to show customized messages to the user.

var svyExpList = new java.util.HashMap();

//Add your message to the respective Exceptions
svyExpList.put(ServoyException.ACQUIRE_LOCK_FAILURE, "Acquire Lock Failure");
svyExpList.put(ServoyException.BAD_SQL_SYNTAX, "Bad Sql Syntax");
svyExpList.put(ServoyException.DATA_ACCESS_RESOURCE_FAILURE, "Data Access Failure");
svyExpList.put(ServoyException.DATA_INTEGRITY_VIOLATION, "Data Integrity Violation.");
svyExpList.put(ServoyException.DEADLOCK, "Dead Lock");
svyExpList.put(ServoyException.DELETE_NOT_GRANTED, "Delete not Granted.");
svyExpList.put(ServoyException.EXECUTE_PROGRAM_FAILED, "Execute Program failed.");
svyExpList.put(ServoyException.INCORRECT_LOGIN, "Incorrect login");
svyExpList.put(ServoyException.INVALID_INPUT, "Invalid Input");
svyExpList.put(ServoyException.INVALID_INPUT_FORMAT, "Invalid Input Format");
svyExpList.put(ServoyException.INVALID_RESULTSET_ACCESS, "Invalid Resultset Access");
svyExpList.put(ServoyException.NO_ACCESS, "No Access");
svyExpList.put(ServoyException.NO_CREATE_ACCESS, "No Create Access");
svyExpList.put(ServoyException.NO_DELETE_ACCESS, "No Delete Access");
svyExpList.put(ServoyException.NO_LICENSE, "No License");
svyExpList.put(ServoyException.NO_MODIFY_ACCESS, "No Modify Access");
svyExpList.put(ServoyException.NO_PARENT_DELETE_WITH_RELATED_RECORDS, "No Parent Delete with Related Record");
svyExpList.put(ServoyException.NO_RELATED_CREATE_ACCESS, "No Related Create Access");
svyExpList.put(ServoyException.PERMISSION_DENIED, "Permission Denaid");
svyExpList.put(ServoyException.RECORD_LOCKED, "Record Locked");
svyExpList.put(ServoyException.SAVE_FAILED, "Save Failed");
svyExpList.put(ServoyException.UNKNOWN_DATABASE_EXCEPTION, "Unknown Database Exception");

var exception = arguments[0]; //Occurred Exception

if (exception.isServoyException) //Servoy Exception
{
var msg = svyExpList.get(exception.getErrorCode());
plugins.dialogs.showErrorDialog( "Error Occured !!", msg, 'OK');

}

Add your own messages to each Exception to show the user a proper message.

Changing the Default UI Settings of Elements in Servoy

2008-09-22T14:11:00.007+05:30

Look and Feel is used to set the general appearance of the Swings Component in java. Java Cross Platform Look & Feel is the default and this is the most portable also. You can design your own Look and Feel and apply your application as well. There are number of Free & Commercial Look and Feel available. You can google for the same or a good place to start with is from http://www.javootoo.com.

I just want to change the Default UI of the Swing Component. Then, I google through and found some of the facts that help me to play with the Default UI settings of the Swings Component. The javax.swing.UIManager class is used to handle most of the UI related aspects.

All the UI related properties are stored against keys. You can override or set the new value for the keys by using the javax.swing.UIManager.put(Object key, Object value) method.

You can get all the list of Keys & there default values by executing the below statements :

UIDefaults uiDefaults = UIManager.getDefaults();
Enumeration enum1 = uiDefaults.keys();
while (enum1.hasMoreElements())
{
Object key = enum1.nextElement();
Object value = uiDefaults.get(key);

System.out.println("Key : " + key + " - " + "Value : " + value);
}

This will print Keys And their default values.

You can change the Default UI Settings of Elements in Servoy by using the below code :

Let I want to change the Selection Background Color of the ComboBox to Pink. The below Code will do the same.

application.setUIProperty("ComboBox.selectionBackground", new Packages.javax.swing.plaf.ColorUIResource(java.awt.Color.PINK));

Here, the "ComboBox.selectionBackground" is the key responsible for Selection Background Color and the value is a Object of ColorUIResource.

Likewise, you can change the Default UI Settings by overriding the desired key values.

[FREE] Record Plugin for SERVOY, "mfRecordPro1.0" Released

2008-09-10T10:27:00.006+05:30

mfRecordPro is the Record Plugin for Servoy. The plugin can be used for recording audio from your Servoy application. The Plugin also has the facility to play back the recently recoded audio or the previously stored one. The plugin returns the recorded audio as byte array which can be stored in the database and can be played back latter. You can use the Play() method to play the recently recorded audio or the previously recorded audio by passing to the play method as an argument. The Plugin has been tested in Servoy 3.5 & 4.0 Final under java version 1.6. The Plugin works well in rich client and in WebClient as well. The plugin also has the facility to export the recorded audio by specifying a suitable audio file format. The plugin comes up with a default Recording Interface to record & play audio. How ever, the plugin also has the methods to design the interface of your own.

You can have a look to the demonstration video at here.

The Plugin & Sample Servoy Solution can be downloaded from here.

Servoy Forum post & feed backs : http://www.servoy.com/forum/viewtopic.php?f=15&t=11162

Happy Recording... :) :)

[FREE] JSpinner Bean for SERVOY

2008-09-10T10:20:00.004+05:30

JSpinner Bean for SERVOY is the JSpinner swing component of Java. With the help of JSpinner bean of SERVOY, user can spins through a specific range of numbers, spins through specific range of dates & times and also can spin through list of custom values. It has all the properties & methods to access & change the value of the JSpinner with in the SERVOY Environment.

Sample Servoy Solution & the Bean can be downloaded from here.

Servoy Forum post and feed backs : http://www.servoy.com/forum/viewtopic.php?f=14&t=9778