Spring 3 Scheduler

Basic Schduler in spring 3

<beans
 xmlns:task="http://www.springframework.org/schema/task"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/task  http://www.springframework.org/schema/task/spring-task-3.0.xsd
  ">


<task:scheduler id="Scheduler" pool-size="10" />
 <task:executor id="TaskExecutor" pool-size="10"/>
 <task:annotation-driven executor="TaskExecutor" scheduler="Scheduler"/>

 <bean id="schedulerService" class="com.operation.service.SchedulerService"
    scope="singleton"/>


/**
 * @author jjhangu
 *
 */
public class SchedulerService {
 @Scheduled(fixedDelay = 5000)
 public void doSomething() {
  final long time = System.currentTimeMillis();
  final SimpleDateFormat dayTime = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");
  final String str = dayTime.format(new Date(time));
  System.out.println("gap is 5 second" + str);
 }
}


log gap is 5scond2013-06-28 02:06:44
log gap is 5scond2013-06-28 02:06:49

AOP Method Signiture Pattern

AOP Method Signiture Patterns

I studied a lot of time to study AOP.
as i studied i feel like master of AOP but as time gone by i forget how to use
and re searching online guide of AOP
so I want summarize about use of AOP
Hope that it would be helpful me and you guys


The first wild card means method type : public, private, protected, *(all)

If AopTest.class exist in different package


execution(* com.sang.hwa.AopTest.*(..))

if AopTest.class exist in same package 

all method mapping in AopTest.class


execution(* AopTest.*(..))

//If class name has xxxxController.class it will be mapped
execution(public * com.sns.controller..*Controller.*(..))



package com.sns.common.aspect;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * {@link SnsPointDay} 의 point-cut 지정 및 결과 코드 처리를 위한 어노테이션
 * 
 */
@Target({ ElementType.METHOD, ElementType.TYPE })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface SnsPointDay {

	public String div() default "00";

	public String category();

	public String item();

	public int point() default 1;

	public String status() default "";

}

@Before(@annotation(com.sns.common.aspect.SnsPointDay))

@AfterReturning("@annotation(point)")
	public void afterControllerWithPoint(JoinPoint jp, SnsPoint point) throws Throwable {

        }

//Annotation Expression 

//$$(And), ||(or), !(not)

@Pointcut("operation() || execution() || @annotation(pointDay)")


@Before("execution(* *.*(..)) && target(target) && args(a,b)")
public void logParameter(Object target, dobule a, double b){
    log.info("class : " + taget.getClass().getName());
    log.info(" values : " + a + " , " + b);
}

Extends Session Time for Every Request

Extend Session

Why I worte this post?


1. After loging application, session time starts {Session Time}
2. For example, Session time set as 30 It means, your Session will validate after 30minutes late from first login
3. if you want to extends session time from some request within 30minute
4. you have to add duration from
4. below is solution to extends session time

// this is the time session created
long createdtime=session.getCreationTime();
// current Time
long currentTime = System.currentTimeMillis();
long lastAcessedTime = session.getLastAccessedTime();
// duration from first session created
int duration= (int)((currentTime - lastAcessedTime)/1000);
// session time
int inactive=session.getMaxInactiveInterval();
// set new session time (duration + original session Time)
request.getSession().setMaxInactiveInterval(duration+ inactive);

Spring Scope

Generally Spring has 5type of scopes

• 1. SingleTon : Spring IOC make one bean context for container
• 2. Prototypes : Every request, Spring IOC make every new context
• 3. Request : For One Request, Spring IOC make one bean context
• 4. Session : For Session, Spring IOC make one bean context
• 5. GlobalSession : ...

First default Scope(Singleton)

Student class

package prototype;

/**
 * @author jjhangu
 * 
 */
public class Student {
 private String name = null;

 /**
  * @author jjhangu @create 2013. 4. 25.
  */
 public String getName() {
  return name;
 }

 /**
  * @author jjhangu @create 2013. 4. 25.
  */
 public void setName(String name) {
  this.name = name;
 }

}

Bus class

package prototype;

import java.util.ArrayList;
import java.util.List;

/**
 * @author jjhangu
 * 
 */
public class Bus {

 private List students = new ArrayList();

 public void addStudent(Student student) {
  students.add(student);
 }

 public String getStudents() {
  String names = "";
  for (final Student student : students) {
   names = names + "," + student.getName();
  }
  return names;
 }
}

Main class

package prototype;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @author jjhangu
 * 
 */
public class Main {

 public static void main(String args[]) {
  final ApplicationContext context = new ClassPathXmlApplicationContext("Prototype.xml");

  final Student aaa = (Student) context.getBean("aaa");
  final Student bbb = (Student) context.getBean("bbb");
  final Student ccc = (Student) context.getBean("ccc");

  final Bus bus1 = (Bus) context.getBean("bus");
  bus1.addStudent(aaa);
  bus1.addStudent(bbb);

  System.out.println(" Bus 1 list : " + bus1.getStudents());

  final Bus bus2 = (Bus) context.getBean("bus");
  bus2.addStudent(ccc);

  System.out.println(" Bus 2 list : " + bus2.getStudents());
 }
}

Prototype.xml class

      
    
 
 
 
   
    aaa
   
 
 
 
   
    bbb
   
 
 
 
   
    ccc
   
 
 
 

Bus 1 list : ,aaa,bbb
Bus 2 list : ,aaa,bbb,ccc

Second Scope(prototype)

Prototype.xml class

      
   
 
 
 
   
    aaa
   
 
 
 
   
    bbb
   
 
 
 
   
    ccc
   
 
 
 

Bus 1 list : ,aaa,bbb
Bus 2 list : ,ccc

Spring Annotation Qualifier

@Autowired Annotation finds which bean is proper to set
if there are more than one bean, @Autowired don't know which bean is proper
so use @Qualifier to target the proper bean

HelloController class

public class Qualifier{
package com.sang.common.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/welcome")
public class HelloController {

 @Autowired
 @Qualifier("helloTwoWorld")
 private HelloWorld helloWorld;

 @RequestMapping(method = RequestMethod.GET)
 public String printWelcome(ModelMap model) {

  model.addAttribute("message", helloWorld.getName());
  return "hello";

 }

}
}

HelloWorld class

package com.sang.common.controller;

/**
 * Spring bean
 * 
 */
public class HelloWorld {
 private String name;

 public void setName(String name) {
  this.name = name;
 }

 /**
  * @author jjhangu @create 2013. 4. 24.
  * 
  * @return the name
  */
 public String getName() {
  return name;
 }

 public void printHello() {
  System.out.println("Spring 3 : Hello ! " + name);
 }
}

mvc-dispatcher-servlet.xml

 

 
  
   /WEB-INF/pages/
  
  
   .jsp
  
 
 
 

Qualifier.xml

      
 
   
    one
    
   
 
 
 
   
    two
    
   
 
 
 

Log

http://localhost:8080/SpringQualifier/welcome
you will see : Message : two

@Async in Spring Future

FutureAnnotaion class

/**
 * (c)Copyright 2010-2010, BaruSoft Co., Ltd. All rights reserved 

 * 
 * @description 

 * 
 * @create 2013. 4. 18.
 * @author jjhangu
 */
package com.jjhangu.core;

import java.util.concurrent.Future;

import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.AsyncResult;

/**
 * @author jjhangu
 * 
 */
public class FutureAnnotaion {

 @Async
 public Future getMessage(int j) {
  final int result = 0;

  for (int i = 0; i < 10000000; i++) {
   if (i == (10000000 - 1)) {
    System.out.println("finish : " + j);
   }
  }

  return new AsyncResult(result);
 }

}

FutureAnnotationMain class

/**
 * (c)Copyright 2010-2010, BaruSoft Co., Ltd. All rights reserved 

 * 
 * @description 

 * 
 * @create 2013. 4. 18.
 * @author jjhangu
 */
package com.jjhangu.core;

import java.util.concurrent.ExecutionException;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @author jjhangu
 * 
 */
public class FutureAnnotationMain {

 public static void main(String args[]) throws InterruptedException, ExecutionException {
  final ApplicationContext context = new ClassPathXmlApplicationContext("SpringBeans.xml");

  final FutureAnnotaion obj = (FutureAnnotaion) context.getBean("futureAnnotaion");

  for (int i = 0; i < 10; i++) {
   obj.getMessage(i);
  }
 }
}

SpringBeans.xml

pom.xml

 4.0.0
 com.mkyong.core
 Spring3Example
 jar
 1.0-SNAPSHOT
 Spring3Example
 http://maven.apache.org

 
  3.0.5.RELEASE
 

 
  
   junit
   junit
   4.8.2
   test
  

  
  

  
   org.springframework
   spring-context
   ${spring.version}
  

  
   cglib
   cglib
   2.2.2
  

 

log

finish : 8
finish : 4
finish : 9
finish : 7
finish : 6
finish : 5
finish : 3
finish : 0
finish : 2
finish : 1

Spring Properties get in class

test.properties

application.file.home = fileHomeString

spring.xml

      
        classpath:/properties/test.properties
      

Bean class

public PropertyTest class{

  @Value("${" + "application.file.home" + "}")
  private String propertiValue;

}

Spring Mvc jsp Exception Page

Web.xml

  
  java.lang.Exception
  /WEB-INF/pages/error.jsp
  

error.jsp

<%@ page language="java" contentType="text/html; charset=EUC-KR" isErrorPage="true"
    pageEncoding="EUC-KR"%>
<%@taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>








${hello} This is an error page <%= exception %>

HandlerExceptionResolver class

public class SnsHandlerExceptionResolver implements HandlerExceptionResolver

@Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception error) {

     if (request.getRequestURI().contains(".htm")) {
request.setAttribute("javax.servlet.error.exception", error);
request.setAttribute("hello", "hello");
final ModelAndView view = new ModelAndView();
return view;
}

}

If servlet Exception Occured this error.jsp page will called