Programming tools

How to charge any device from Lemon

Step 1 :-

Step 2:- 

Step 3:-

Step 4:- 

Step 5:-

Step 6:-

Step 7:-

Step 8:-

Step 9:-

Video Understanding :-

Two Datasource in Spring/Hiberate

We can create two datasource in a single spring/hibernate application.

There are following steps required to implement this:-

Create JNDI Datasource while using Tomcat :- 

1. Resource entry in server.xml under <GlobalNamingResources> for both datasources
   You can find server.xml in following path in Tomcat folder :-
    c://Tomcat/conf/server.xml

<globalnamingresources>
    <resource name="jdbc/first"  driverclassname="com.microsoft.sqlserver.jdbc.SQLServerDriver" maxwait="5000" password="makecodeeasy" type="javax.sql.DataSource" url="jdbc:sqlserver://localhost:1433;DatabaseName=DataTest" username="makecodeeasy" validationquery="select 1">
    </resource>

 <resource name="jdbc/second"  driverclassname="com.microsoft.sqlserver.jdbc.SQLServerDriver" maxwait="5000" password="123" type="javax.sql.DataSource" url="jdbc:sqlserver://192.182.21.66:1433;DatabaseName=Second" username="sa" validationquery="select 1">
    </resource>
 </globalnamingresources>

Note :- Database used here in MS Sql server 2008. You can use any database. You need to change driverClassname, url, username and password according to  database.
2. Do the entry in web.xml for both resources
   You can find web.xml in WEB-INF folder of your application

<resource-ref>
  <description>DB Connection Pooling</description> 
  <res-ref-name>java:comp/env/jdbc/first</res-ref-name> 
  <res-type>javax.sql.DataSource</res-type> 
  <res-auth>Container</res-auth> 
  <res-sharing-scope>Shareable</res-sharing-scope> 
</resource-ref>


<resource-ref>
  <description>DB Connection Pooling</description> 
  <res-ref-name>java:comp/env/jdbc/second</res-ref-name> 
  <res-type>javax.sql.DataSource</res-type> 
  <res-auth>Container</res-auth> 
  <res-sharing-scope>Shareable</res-sharing-scope> 
</resource-ref>

3. Use datasource in applicationContext or spring context file

<bean id="firstDataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
  <property name="jndiName" value="java:comp/env/jdbc/first" /> 
  <property name="resourceRef" value="true" /> 
</bean>

<bean id="secondDataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
  <property name="jndiName" value="java:comp/env/jdbc/second" /> 
  <property name="resourceRef" value="true" /> 
</bean> 

4. Create two session factory for using two datasource.
   

   <bean id="firstSessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" p:dataSource-ref="firstDataSource" p:configLocation="${hib.config}" p:packagesToScan="com.org.xyz.domain">
   </bean>

   <bean id="secondSessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" p:dataSource-ref="secondDataSource" p:configLocation="${hib.config}" p:packagesToScan="com.org.abc.domain">
   </bean>

   
   
5. Now these session factories can be used in Hibernate application.
   

JNDI Datasource in spring

There are two sources of database connections - either a  DataSource or a  DriverManager.

JNDI
The Java Naming and Directory Interface (JNDI) is part of the Java platform, providing applications based on Java technology with a unified interface to multiple naming and directory services. You can build powerful and portable directory-enabled applications using this industry standard.

Create JNDI Datasource while using Tomcat :- 

1. Resource entry in server.xml under <GlobalNamingResources>
   You can find server.xml in following path in Tomcat folder :-
    c://Tomcat/conf/server.xml

<globalnamingresources>
    <resource name="jdbc/test"  driverclassname="com.microsoft.sqlserver.jdbc.SQLServerDriver" maxwait="5000" password="makecodeeasy" type="javax.sql.DataSource" url="jdbc:sqlserver://localhost:1433;DatabaseName=DataTest" username="makecodeeasy" validationquery="select 1">
    </resource>
</globalnamingresources>

Note :- Database used here in MS Sql server 2008. You can use any database. You need to change driverClassname, url, username and password according to  database.
2. Do the entry in web.xml
   You can find web.xml in WEB-INF folder of your application

<resource-ref>
  <description>DB Connection Pooling</description> 
  <res-ref-name>java:comp/env/jdbc/test</res-ref-name> 
  <res-type>javax.sql.DataSource</res-type> 
  <res-auth>Container</res-auth> 
  <res-sharing-scope>Shareable</res-sharing-scope> 
</resource-ref>

3. Use datasource in applicationContext or spring context file

<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
  <property name="jndiName" value="java:comp/env/jdbc/test" /> 
  <property name="resourceRef" value="true" /> 
</bean>

4. Your Datasource is ready to use. It can also be used in hibernate.
   

Browser CSS Hacks

CSS Hacks

/***** Selector Hacks ******/

/* IE6 and below */

* html #mydiv  { color: red }

/* IE7 */

*:first-child+html #dos { color: red }

/* IE7, FF, Saf, Opera  */

html>body # mydiv  { color: red }

/* IE8, FF, Saf, Opera (Everything but IE 6,7) */

html>/**/body # mydiv  { color: red }

/* Opera 9.27 and below, safari 2 */

html:first-child # mydiv  { color: red }

/* Safari 2-3 */

html[xmlns*=""] body:last-child #seis { color: red }

/* safari 3+, chrome 1+, opera9+, ff 3.5+ */

body:nth-of-type(1) #mydiv  { color: red }

/* safari 3+, chrome 1+, opera9+, ff 3.5+ */

body:first-of-type #mydiv  {  color: red }

/* saf3+, chrome1+ */

@media screen and (-webkit-min-device-pixel-ratio:0) {

 #mydiv  { color: red  }

}

/* iPhone / mobile webkit */

@media screen and (max-device-width: 480px) {

 #mydiv  { color: red  }

}

/* Safari 2 - 3.1 */

html[xmlns*=""]:root #mydiv  { color: red  }

/* Safari 2 - 3.1, Opera 9.25 */

*|html[xmlns*=""] #mydiv  { color: red  }

/* Everything but IE6-8 */

:root *> #mydiv  { color: red  }

/* IE7 */

*+html #mydiv  {  color: red }

/* Firefox only. 1+ */

#mydiv ,  x:-moz-any-link  { color: red }

/* Firefox 3.0+ */

#mydiv ,  x:-moz-any-link, x:default  { color: red  }

/* FF 3.5+ */

body:not(:-moz-handler-blocked) #mydiv { color: red; }

/***** Attribute Hacks ******/

/* IE6 */

#mydiv { _color: blue }

/* IE6, IE7 */

#mydiv { *color: blue; /* or #color: blue */ }

/* Everything but IE6 */

#mydiv { color/**/: blue }

/* IE6, IE7, IE8 */

#mydiv { color: blue\9; }

/* IE7, IE8 */

#mydiv { color/*\**/: blue\9; }

/* IE6, IE7 -- acts as an !important */

#mydiv { color: blue !ie; } /* string after ! can be anything */

/* IE8, IE9 */

#mydiv  {color: blue\0/;} /* must go at the END of all rules */

Some More Hacks :-

#mydiv {

    width:89px; (common for all)
    margin-left/*\**/:90px\9; ( For IE8)
    margin-top/*\**/:-31px\9;
}

#mydiv  {

    width:89px;
    margin-left/*\**/: 180px\9;
    margin-top/*\**/:-32px\9;
   
}
(only IE6)
* html #mydiv  {
    margin-left:95px;
    margin-top:-33px;
}

*html #mydiv  {
    margin-left:186px;
    margin-top:-30px;
}
(only IE7)
*:first-child+html #mydiv  {
    margin-left:90px;
    margin-top:-30px;
}

*:first-child+html #mydiv  {
    margin-left:180px;
    margin-top:-27px;
}

(SAFARI)
body:last-child:not(:root:root) #mydiv  {
    margin-left:90px;
    margin-top:-31px;
}

body:last-child:not(:root:root) #mydiv  {
    margin-left:180px;
    margin-top:-31px;
}

/* body:first-of-type #mydiv  {
    margin-left:90px;
    margin-top:-31px;
}

body:first-of-type #mydiv  {
    margin-left:180px;
    margin-top:-31px;
}
*/

/*::root #mydiv  {
    margin-left:90px;
    margin-top:-31px;
}

::root #mydiv  {
    margin-left:180px;
    margin-top:-31px;
}
*/

/* @media screen and (-webkit-min-device-pixel-ratio:0){
    #mydiv  {
        margin-left:90px;
        margin-top:-31px;
    }
    #mydiv  {
        margin-left:180px;
        margin-top:-31px;
    }

}
*/

JNDI

The Java Naming and Directory Interface (JNDI) is part of the Java platform, providing applications based on Java technology with a unified interface to multiple naming and directory services. You can build powerful and portable directory-enabled applications using this industry standard.

Example of creating JNDI Datasource.

Iterate a HashMap

HashMap is an object that stores both “key/value” as a pairs.
It is one of the most useful data structures in the Java programming language.

Step by Step Iterating a HashMap :- 

Method 1 :-

Map<Integer, Integer> map = new HashMap<Integer, Integer>();

//iterating over keys only
for (Integer key : map.keySet()) {
System.out.println("Key = " + key);
}

//iterating over values only
for (Integer value : map.values()) {
System.out.println("Value = " + value);
}

Method 2 :-

Map<Integer, Integer> map = new HashMap<Integer, Integer>();
for (Map.Entry<Integer, Integer> entry : map.entrySet()) {
    System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());
}