When we need to perform batch jobs, better to use Spring Batch.
This is matured framework with many options.
1. Easy to configure
2. Repeat options / Retry options
3. Scalability with parallel process
4. Support for multiline records
Many more
http://docs.spring.io/spring-batch/reference/html/index.html
Spring Web Services 2 Cookbook
Paperback: 322 pages
Publisher: Packt Publishing (May 13, 2012)
Language: English
ISBN-10: 1849515824
ISBN-13: 978-1849515825
Books is available at Amazon.com
This is very nice book on Spring Web Services.
Problem Statement: How to build very nice rich website?
Option 1: Single tier architecture
Advantages: Saves Time, Easy to implement
Disadvantages: Difficult to break up later to support other user interfaces.
Option 2: Two tier architecture
Advantages: Both are in its own spheres. Easy to modify and re-write later if required.
Disadvantages: Takes more time to setup the environment and looks like more code.
Technologies:
UI: GWT
Services: Spring, RESTful Services, Hibernate
Notes:
RESTful – http://www.xfront.com/REST-Web-Services.html
Restlet with Spring – http://jgoday.wordpress.com/2009/04/10/restlet-with-spring/
RESTful from Wiki: http://en.wikipedia.org/wiki/Representational_State_Transfer
Archtypes:
Archetype – HibernateSpringGwt https://opensource.fastconnect.org/redmine/projects/show/spring-gwt-archetype
maven-gwtext-archetype http://code.google.com/p/maven-gwtext-archetype/
-o-
Problem Statement: We need to start some task, after injecting all properties. How to resolve this?
Solution: Dont / Never depend on order of injecting values into bean. It is not controlled.
import org.springframework.beans.factory.InitializingBean;
public class BeanName implements InitializingBean
{
public void afterPropertiesSet() throws Exception
{
System.out.println( "It will be called after completion of properties setting.");
//do whatever is required here.
}
}
Problem Statement: How to inject boolean values into spring bean?
Wrong:
<property name="isFlagEnabled" value="true"/>
private boolean isFlagEnabled = false;
Correct:
<property name="isFlagEnabled"> <value type="java.lang.Boolean">true</value> </property>
private Boolean isFlagEnabled = false;
-o-
Problem Statement: Spring – Inject Properties file into Bean
Spring Bean configuration file
<?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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd">
<util:properties id="propertiesFileID1" location="classpath:complete_file_pathfilename.properties"/>
<bean name="BeadID" class = "com.abc.ClassNameABCD" >
<property name="propFile1" ref="propertiesFileID1"/>
</bean>
</beans>
Source code
package com.abc;
import java.util.Properties;
public class ClassNameABCD
{
private Properties propFile1;
//Prepare getter and setters for propFile1;
}
Read this for more information
http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/apcs02.html#xsd-config-body-schemas-util-properties
Problem Statement: Configure Oracle Connection Pool in Spring
This is basic data source (Only testing)
<bean id="datasource1"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>oracle.jdbc.driver.OracleDriver</value>
</property>
<property name="url">
<value>ORACLE URL</value>
</property>
<property name="username">
<value>user id</value>
</property>
<property name="password">
<value>user password</value>
</property>
</bean>
This is dbcp data source (Preferred for Testing.)
<bean id="datasource2"
class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName">
<value>org.apache.commons.dbcp.BasicDataSource</value>
</property>
<property name="url">
<value>ORACLE URL</value>
</property>
<property name="username">
<value>user id</value>
</property>
<property name="password">
<value>user password</value>
</property>
<property name="initialSize" value="5"/>
<property name="maxActive" value="20"/>
</bean>
This is Oracle Connection Pool (Production Quality)
<bean id="connectionPool1" class="oracle.jdbc.pool.OracleDataSource" destroy-method="close">
<property name="connectionCachingEnabled" value="true" />
<property name="URL">
<value>ORACLE URL</value>
</property>
<property name="user">
<value>user id</value>
</property>
<property name="password">
<value>user password</value>
</property>
<property name="connectionCacheProperties">
<value>
MinLimit:1
MaxLimit:5
InitialLimit:1
ConnectionWaitTimeout:120
InactivityTimeout:180
ValidateConnection:true
</value>
</property>
</bean>
Oracle Connection Pool is better than DBCP and C3P0
-o-
select * from v$version;
“BANNER”
“Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 – 64bit Production”
“PL/SQL Release 11.2.0.1.0 – Production”
“CORE 11.2.0.1.0 Production”
“TNS for Linux: Version 11.2.0.1.0 – Production”
“NLSRTL Version 11.2.0.1.0 – Production”
Go to Oracle and Choose correct Driver and Download it.
http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-112010-090769.html
Option 1: Added to Maven Repo and pom.xml
Add jar to maven Repo
http://www.mkyong.com/maven/how-to-add-oracle-jdbc-driver-in-your-maven-local-repository/
Refer it in pom file.
<project ...> <dependencies>> <!-- ORACLE database driver --> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.2.0.1.0</version> </dependency> </dependencies> </project>
Option 2: Add the jar file to Lib folder.
