Java Tutorial/Spring/Singleton

BeanFactory PreInstantiate Singletons Integration

File: context.xml

   <source lang="java">

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

   "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

  <bean id="instantiationCounterClass"
     class="InstantiationCounterClass"/>

</beans></source>

Prototype Singleton

File: context.xml

   <source lang="java">

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

   "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

  <bean id="primeIterator"
     class="PrimeIterator" singleton="false">
     <property name="start" value="1000"/>
  </bean>

</beans></source>

Singleton Scope And Prototype Scope

File: context.xml

   <source lang="java">

<?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.xsd
               http://www.springframework.org/schema/util
               http://www.springframework.org/schema/util/spring-util.xsd">
   <bean id="singleMe" class="java.lang.String" scope="singleton">
       <constructor-arg type="java.lang.String" value="Singleton"/>
   </bean>
   <bean id="prototypeMe" class="java.lang.String" scope="prototype">
       <constructor-arg type="java.lang.String" value="Prototype"/>
   </bean>

</beans></source>

Spring Prototype

File: context.xml

   <source lang="java">

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <beans>

   <bean id="prototypeClient"
         class="SpringPrototypeClient">
       <property name="message1" ref="message"/>
       <property name="message2" ref="message"/>
   </bean>
   <bean id="message" class="EmailMessage" singleton="false"/>

</beans></source>