Answer Posted / prakash sah

Here is the defination and example in case of spring:

Local Vs Global Transaction:

Local transactions are transactions associated with a
particalar data source (means they are resource-specific).
the most common example would be a transaction associated
with a JDBC connection. While Global Transactions provide
the ability to work with multiple transactional resources
(typically relational databases and message queues).

Example of Local transaction :

<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>

<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>

DataSourceTransactionManager : takes the datasource as one
of its properties.

even HibarnateTransactionManager takes sessionfactory which
in turn uses datasource as a property or it also takes
datasource as one of the property.


Example of Global transaction :

If we use JTA in a J2EE container, as in the
'dataAccessContext-jta.xml' file from the same sample
application, we use a container DataSource, obtained via
JNDI, in conjunction with Spring's
JtaTransactionManager. The JtaTransactionManager doesn't
need to know about the DataSource, or any
other specific resources, as it will use the container's
global transaction management infrastructure.


<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jee="http://www.springframework.org/schema/jee"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee-2.5.xsd">
<jee:jndi-lookup id="dataSource" jndi-name="jdbc/jpetstore"/>
<bean id="txManager"
class="org.springframework.transaction.jta.JtaTransactionManager"
/>
<!-- other <bean/> definitions here -->
</beans>

how to know the total memory occupied by the objects in the ArrayList(Array list may contain duplicate objects)

2325

---

What is a singleton class? Give a practical example of its usage.

1085

---

What is the diffrence between inner class and nested class?

1065

---

How to print an arraylist in java?

1058

---

Can a list be null in java?

1029

---

Define the term string pool?

994

---

What is the use of list in java?

970

---

How do you download stubs from Remote place?

1763

---

Difference between final and effectively final ?

1077

---

What’s the difference between constructors and other methods?

976

---

When should a function throw an exception?

1024

---

Is passing by reference faster?

975

---

When is the finalize() called?

1161

---

What is thread start?

943

---

What is use of inner class in java?

1119

---