Event.stopPropagation() and Event.preventDefault()

1. event.stopPropagation() stops an event from bubbling up the event chain

2. event.preventDefault() will only prevent browser’s default action on that event from occurring, but the event still propogates up the event chain.


Example

$("#myDiv").click(function() {
   alert('click on #myDiv');
});

$("#divButton").click(function(e) {
   alert('button click');
   e.stopPropagation();
});

SSL Certificate err

{http://xml.apache.org/axis/}stackTrace:javax.net.ssl.SSLException: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:190) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1649) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1612) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1595) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1172) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1149) at org.apache.axis.components.net.JSSESocketFactory.create(JSSESocketFactory.java:186) at org.apache.axis.transport.http.HTTPSender.getSocket(HTTPSender.java:191) at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:404) at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138) at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)

Comments:

1. Check the truststore path in a .properties file it should be on correct location?
2. You can try (double escape \) in that path for windows machine.

Detecting an undefined object in JavaScript

typeof allows the identifier to never been declared before

if (typeof obj == "undefined")

instead of

if(obj == null) // will throw an error due to never declared

How to stop caching with jQuery ($.get(), $.ajax() etc) and javascript

To make it unique for each passes, we can place in a random number behind the url as shown below

$.get('remoteUrl.do?'+Math.random()+, function(data){

	$('#msg'+id).html(data);

}, 'html');

Set cache:false 

$.ajax({

	url: 'remoteUrl.do',

	cache: false,

	success: function(data){

		$('#resultDiv').append(data);

	} }); 

$.ajaxSetup({

	cache: false

});

Disable caching using html meta tag:

<meta equiv="cache-control" content="no-cache"><meta equiv="expires" content="0"><meta equiv="pragma" content="no-cache">

org.hibernate.PropertyAccessException

nested exception is org.hibernate.PropertyAccessException: Exception occurred inside getter of Hibernate Object

Reason:

Nullable database column was mapped to a primitive type property

The Hibernate type is not castable to the property type (or vice-versa)

Tomcat - JDBC driver unregisted when the web application stops

SEVERE: A web application registered the JBDC driver [oracle.jdbc.driver.OracleDriver] but failed to unregister it when the web application was stoppe

Solution:
<context-param><br><param-name>webAppRootKey</param-name><br><param-value>webapp.root</param-value><br></context-param>

Glassfish v2( JDBC Connection Pool, JNDI)

Step 1:
Place database driver in glassfish lib dir. (e.g. lib/mysql-jdbc-5.1.11.jar) and restart server.

Step 2:
Login to Admin Console: http:\\localhost:4848\
Goto Resource > JDBC > Connection Pool
Provide Name, Select Database vendor and Select Resource Type

Step 3:
Enter DataSource class name (Database driver)
Change other settings as you want

Save and Ping
:) "Ping Succeed"

Connection Pool is ready