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2010-06-01T06:15:57Z

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в 18:01, 31 мая 2010

2010-05-31T18:01:44Z

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== IoC in properties file ==



<source lang="java">
/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/

///////////////////////////////////////////////////////////////////////////////////////
//File: beans.properties
# The View
view.class=StandardOutView
view.model(ref)=model
# The Model
model.class=HelloWorldModel
///////////////////////////////////////////////////////////////////////////////////////
public interface View {
public void render();

public void setModel(Model m);
public Model getModel();
}

///////////////////////////////////////////////////////////////////////////////////////
public interface Model {
public String getMessage();
}
///////////////////////////////////////////////////////////////////////////////////////
public class StandardOutView implements View {
private Model model = null;
public void render() {
if (model == null) {
throw new RuntimeException(
"You must set the property model of class:"
+ StandardOutView.class.getName());
}
System.out.println(model.getMessage());
}
public void setModel(Model m) {
this.model = m;
}
public Model getModel() {
return this.model;
}
}
///////////////////////////////////////////////////////////////////////////////////////

public class HelloWorldModel implements Model {
public String getMessage() {
return "Hello World!";
}
}
///////////////////////////////////////////////////////////////////////////////////////
import java.io.FileInputStream;
import java.util.Properties;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.PropertiesBeanDefinitionReader;
public class HelloWorldSpring {
public static void main(String[] args) throws Exception {
// get the bean factory
BeanFactory factory = getBeanFactory();
View v = (View) factory.getBean("view");
Model mp = (Model) factory.getBean("model");
v.setModel(mp);
v.render();
}
private static BeanFactory getBeanFactory() throws Exception {
// get the bean factory
DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
// create a definition reader
PropertiesBeanDefinitionReader rdr = new PropertiesBeanDefinitionReader(
factory);
// load the configuration options
Properties props = new Properties();
props.load(HelloWorldSpring.class.getResource("beans.properties").openStream());
rdr.registerBeanDefinitions(props);
return factory;
}
}

</source>



== IoC XML Config ==



<source lang="java">
/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/

///////////////////////////////////////////////////////////////////////////////////////
//File: beans.properties
# The View
view.class=StandardOutView
view.model(ref)=model
# The Model
model.class=HelloWorldModel

///////////////////////////////////////////////////////////////////////////////////////
public interface Model {
public String getMessage();
}

///////////////////////////////////////////////////////////////////////////////////////
public interface View {
public void render();

public void setModel(Model m);
public Model getModel();
}

///////////////////////////////////////////////////////////////////////////////////////

public class StandardOutView implements View {
private Model model = null;
public void render() {
if (model == null) {
throw new RuntimeException(
"You must set the property model of class:"
+ StandardOutView.class.getName());
}
System.out.println(model.getMessage());
}
public void setModel(Model m) {
this.model = m;
}
public Model getModel() {
return this.model;
}
}
///////////////////////////////////////////////////////////////////////////////////////

public class HelloWorldModel implements Model {
public String getMessage() {
return "Hello World!";
}
}

///////////////////////////////////////////////////////////////////////////////////////
import java.io.FileInputStream;
import java.util.Properties;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.PropertiesBeanDefinitionReader;
public class HelloWorldSpringWithDI {
public static void main(String[] args) throws Exception {
// get the bean factory
BeanFactory factory = getBeanFactory();
View mr = (View) factory.getBean("view");
mr.render();
}
private static BeanFactory getBeanFactory() throws Exception {
// get the bean factory
DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
// create a definition reader
PropertiesBeanDefinitionReader rdr = new PropertiesBeanDefinitionReader(
factory);
// load the configuration options
Properties props = new Properties();
props.load(HelloWorldSpringWithDI.class.getResource("beans.properties").openStream());
rdr.registerBeanDefinitions(props);
return factory;
}
}

</source>



== Load Bean Definition From XML File ==



<source lang="java">
/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/

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


<bean id="beanId" name="beanName" class="Bean"/>

</beans>

///////////////////////////////////////////////////////////////////////////////////////
public class Bean{
}

///////////////////////////////////////////////////////////////////////////////////////
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
public class XmlConfigWithBeanFactory {
public static void main(String[] args) {
XmlBeanFactory factory = new XmlBeanFactory(new FileSystemResource(
"build/beans.xml"));
}
}

</source>



== Lookup Demo ==



<source lang="java">
/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/

///////////////////////////////////////////////////////////////////////////////////////
//File: lookup.xml
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="helper" class="MyHelper" singleton="false"/>
<bean id="abstractLookupBean" class="AbstractLookupDemoBean">
<lookup-method name="getMyHelper" bean="helper"/>
</bean>
<bean id="standardLookupBean" class="StandardLookupDemoBean">
<property name="myHelper">
<ref local="helper"/>
</property>
</bean>
</beans>

///////////////////////////////////////////////////////////////////////////////////////
public interface DemoBean {
public MyHelper getMyHelper();
public void someOperation();
}

///////////////////////////////////////////////////////////////////////////////////////
public class MyHelper {
public void doSomethingHelpful() {
// do something!
}
}
///////////////////////////////////////////////////////////////////////////////////////
public class StandardLookupDemoBean implements DemoBean {
private MyHelper helper;

public void setMyHelper(MyHelper helper) {
this.helper = helper;
}

public MyHelper getMyHelper() {
return this.helper;
}

public void someOperation() {
helper.doSomethingHelpful();
}
}
///////////////////////////////////////////////////////////////////////////////////////
public abstract class AbstractLookupDemoBean implements DemoBean {

public abstract MyHelper getMyHelper();

public void someOperation() {
getMyHelper().doSomethingHelpful();
}
}
///////////////////////////////////////////////////////////////////////////////////////
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
import org.springframework.util.StopWatch;
public class LookupDemo {
public static void main(String[] args) {
BeanFactory factory = new XmlBeanFactory(new FileSystemResource(
"build/lookup.xml"));
DemoBean abstractBean = (DemoBean) factory.getBean("abstractLookupBean");
DemoBean standardBean = (DemoBean) factory.getBean("standardLookupBean");
displayInfo(standardBean);
displayInfo(abstractBean);
}
public static void displayInfo(DemoBean bean) {
MyHelper helper1 = bean.getMyHelper();
MyHelper helper2 = bean.getMyHelper();
System.out.println("Helper Instances the Same?: "
+ (helper1 == helper2));
StopWatch stopWatch = new StopWatch();
stopWatch.start("lookupDemo");
for (int x = 0; x < 100000; x++) {
MyHelper helper = bean.getMyHelper();
helper.doSomethingHelpful();
}
stopWatch.stop();
System.out.println("100000 gets took " + stopWatch.getTotalTimeMillis()
+ " ms");
}
}

</source>



== Simplest Usage of property config file In Spring ==



<source lang="java">

/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/

///////////////////////////////////////////////////////////////////////////////////////
//File: msf.properties
renderer.class=StandardOutView
provider.class=HelloWorldModel

///////////////////////////////////////////////////////////////////////////////////////
public interface Model {
public String getMessage();
}

///////////////////////////////////////////////////////////////////////////////////////

public interface View {
public void render();

public void setModel(Model m);
public Model getModel();
}

///////////////////////////////////////////////////////////////////////////////////////

public class StandardOutView implements View {
private Model model = null;
public void render() {
if (model == null) {
throw new RuntimeException(
"You must set the property model of class:"
+ StandardOutView.class.getName());
}
System.out.println(model.getMessage());
}
public void setModel(Model m) {
this.model = m;
}
public Model getModel() {
return this.model;
}
}
///////////////////////////////////////////////////////////////////////////////////////

public class HelloWorldModel implements Model {
public String getMessage() {
return "Hello World!";
}
}

///////////////////////////////////////////////////////////////////////////////////////

import java.io.FileInputStream;
import java.util.Properties;
public class MessageSupportFactory {
private static MessageSupportFactory instance = null;
private Properties props = null;
private View renderer = null;
private Model provider = null;
private MessageSupportFactory() {
props = new Properties();
try {
props.load( MessageSupportFactory.class.getResource("msf.properties").openStream());
// get the implementation classes
String rendererClass = props.getProperty("renderer.class");
String providerClass = props.getProperty("provider.class");
renderer = (View) Class.forName(rendererClass).newInstance();
provider = (Model) Class.forName(providerClass).newInstance();
} catch (Exception ex) {
ex.printStackTrace();
}
}
static {
instance = new MessageSupportFactory();
}
public static MessageSupportFactory getInstance() {
return instance;
}
public View getView() {
return renderer;
}
public Model getModel() {
return provider;
}
}

///////////////////////////////////////////////////////////////////////////////////////
public class HelloWorldDecoupledWithFactory {
public static void main(String[] args) {
View mr = MessageSupportFactory.getInstance().getView();
Model mp = MessageSupportFactory.getInstance().getModel();
mr.setModel(mp);
mr.render();
}
}

</source>

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Admin: 1 версия

в 18:01, 31 мая 2010