bboss factory依赖注入模式使用方法

发布时间：2020-05-23 07:34:07 所属栏目：程序设计来源：互联网

导读：1.bboss aop框架的工厂模式实现组件管理概述 bboss aop框架的工厂模式是bbossgroups3.0新引入的一种组件创建机制，是对原有的属性注入模式和构造函数注入模式的很好补充。具体实现方式如下，在property元素上增加factory-bean、factory-class和factory-method

1.bboss aop框架的工厂模式实现组件管理概述

bboss aop框架的工厂模式是bbossgroups3.0新引入的一种组件创建机制，是对原有的属性注入模式和构造函数注入模式的很好补充。具体实现方式如下，在property元素上增加factory-bean、factory-class和factory-method三个属性，也就是对应property元素管理的组件实例通过factory-bean或者factory-class对应的组件中factory-method对应的方法来创建。factory-bean和factory-class的主要区别：
factory-bean 指定的值是一个组件id，对应aop组件配置文件中的其他组件的一个引用，同时factory-method指定的方法名称是这个组件的
一个实例方法，aop框架通过调用factory-bean对应的组件的factory-method对应的方法来创建组件实例。
factory-class 指定的是创建组件的工厂实现类的全路径，同时factory-method指定的方法名称是这个组件的一个静态或者实例方法，aop框架通过调用factory-class对应的组件的factory-method对应的方法来创建组件实例；当对应的方法是实例方法则首先创建factory-class类对应的工厂实例，如果配置了依赖注入属性，则会先注入这些属性到工厂实例中，然后在该工厂实例上调用factory-method对应的方法来创建组件实例。
如果factory-method指定的方法带有参数，可以通过construction节点包含property节点的方式来指定，多个property节点的排列顺序
要和方法参数的顺序一致，类型要可以转换。

具体的实例可以参考测试用例：
/bbossaop/test/org/frameworkset/spi/beans/factory
我们通过一个简单的案例来介绍工厂模式的使用方法，需要创建的组件为：
org.frameworkset.spi.beans.factory.TestBean
我们通过分别：
通过工厂组件org.frameworkset.spi.beans.factory.TestFactoryBeanCreate中的相关方法来创建TestBean的实例
通过工厂类org.frameworkset.spi.beans.factory.StaticBeanFactory中的相关静态方法来创建TestBean的实例。

下面介绍具体的程序和配置
2.配置文件中如何配置工厂模式

<!-- 
Warning: Factory pattern can not against loop ioc,while loop ioc occured,unknown exception will be throwed.
 -->
<properties>
	<!--
	This is a webservice client example.
	ApplicationContext context = ApplicationContext.getApplicationContext("org/frameworkset/spi/beans/factory/factorybean.xml");
	ETLWebService etlWebService = (ETLWebService)context.getBeanObject("ETLWebService");
	-->
	<property name="ETLWebService" factory-bean="ETLWebServiceFactory" factory-method="create"/>
	
	<property name="ETLWebServiceFactory" class="org.apache.cxf.jaxws.JaxWsProxyFactoryBean">
		<property name="serviceClass" value="org.frameworkset.monitor.etl.webservice.ETLWebService"/>
		<property name="address" value="http://localhost/kettle/webservice/ETLWebServicePort"/>	      
	</property>

	<!-- 
		bean [testbean] will be created used facctory method [createNoArgs] of factory bean [testfactorybean].
		testfactorybean is defined by another composinent.
	 -->
	<property name="testbeanCreateNoArgs" factory-bean="testfactorybean" factory-method="createNoArgs"/>
	<!-- 
		bean [testbean] will be created used facctory method [createWithArgs] of factory bean [testfactorybean].
		testfactorybean is defined by another component.
		constructions parameters will be used as the parameters of createWithArgs method.
	 -->
	<property name="testbeanCreateByArgs" factory-bean="testfactorybean" factory-method="createWithArgs">
		<construction>
			<property name="name" value="duoduo"/>
			<property name="id" value="12"/>	
		</construction>
	</property>
	<!-- 
		bean [testbean] will be created used facctory method [createNoArgsThrowException] of factory bean [testfactorybean].
		testfactorybean is defined by another component.
	 -->
	<property name="testbeanCreateNoArgsThrowException" factory-bean="testfactorybean" factory-method="createNoArgsThrowException"/>
	<!-- 
		bean [testbean] will be created used factory method [createWithArgsThrowException] of factory bean [testfactorybean].
		testfactorybean is defined by another component.
		constructions parameters will be used as the parameters of createWithArgsThrowException method.
		A Exception occur when call createWithArgsThrowException method and component created failed.
	 -->
	<property name="testbeanCreateByArgsThrowException" factory-bean="testfactorybean" factory-method="createWithArgsThrowException">
		<construction>
			<property name="name" value="duoduo"/>
			<property name="id" value="12"/>	
		</construction>
	</property>
	
	<property name="testfactorybean" class="org.frameworkset.spi.beans.factory.TestFactoryBeanCreate">
		<property name="factorydata1" value="duoduo"/>
		<property name="factorydata2" value="12"/>	      
	</property>
	
	<!-- createWithArgs method must be a static method of factory class org.frameworkset.spi.beans.factory.TestFactoryBeanCreate,constructions parameters will be used as the parameters of createWithArgs method.-->
	<property name="staticTestbeanCreateByArgs" factory-class="org.frameworkset.spi.beans.factory.StaticBeanFactory" factory-method="createWithArgs">
		<construction>
			<property name="name" value="duoduo"/>
			<property name="id" value="12"/>	
		</construction>
	</property>
	
	<!-- createNoArgs method must be a static method of factory class org.frameworkset.spi.beans.factory.TestFactoryBeanCreate
		
		 -->
	<property name="staticTestbeanCreateNoArgs" factory-class="org.frameworkset.spi.beans.factory.StaticBeanFactory" factory-method="createNoArgs"/>
	
	
	<!-- createWithArgsThrowException method must be a static method of factory class org.frameworkset.spi.beans.factory.TestFactoryBeanCreate,constructions parameters will be used as the parameters of createWithArgsThrowException method.
		 A Exception occur when call createWithArgsThrowException method and component created failed.
		 -->
	<property name="staticTestbeanCreateByArgsThrowException" factory-class="org.frameworkset.spi.beans.factory.StaticBeanFactory" factory-method="createWithArgsThrowException">
		<construction>
			<property name="name" value="duoduo"/>
			<property name="id" value="12"/>	
		</construction>
	</property>
	
	<!-- createNoArgsThrowException method must be a static method of factory class org.frameworkset.spi.beans.factory.TestFactoryBeanCreate
	A Exception occur when call createNoArgsThrowException method and component created failed.
		 -->
	<property name="staticTestbeanCreateNoArgsThrowException" factory-class="org.frameworkset.spi.beans.factory.StaticBeanFactory" factory-method="createNoArgsThrowException"/>	


</properties>

对应的配置文件存放的地址：org/frameworkset/spi/beans/factory/factorybean.xml
3.需要创建的组件

package org.frameworkset.spi.beans.factory;

/**
 * <p>Title: TestBean.java</p> 
 * <p>Description: </p>
 * <p>bboss workgroup</p>
 * <p>Copyright (c) 2007</p>
 * @Date 2011-1-14 上午10:13:42
 * @author biaoping.yin
 * @version 1.0
 */
public class TestBean {
	private String name;
	private int id;

	public TestBean(String name,int id) {
		
		this.name = name;
		this.id = id;
	}
	
	public TestBean() {		
	}

	protected String getName() {
		return name;
	}

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

	protected int getId() {
		return id;
	}

	protected void setId(int id) {
		this.id = id;
	}
}

4.管理组件的工厂
静态工厂

package org.frameworkset.spi.beans.factory;

/**
 * <p>Title: StaticBeanFactory.java</p> 
 * <p>Description: </p>
 * <p>bboss workgroup</p>
 * <p>Copyright (c) 2007</p>
 * @Date 2011-1-14 上午10:55:07
 * @author biaoping.yin
 * @version 1.0
 */
public class StaticBeanFactory {
	
	public static TestBean createWithArgs(String name,int id)
	{
		return new TestBean(name,id);
	}
	
	
	public static TestBean createNoArgs()
	{
		return new TestBean();
	}
	
	
	public static TestBean createWithArgsThrowException(String name,int id) throws Exception
	{
		throw new Exception("createWithArgsThrowException name:"+name+",id：" + id );
	}
	
	
	public static TestBean createNoArgsThrowException() throws Exception
	{
		throw new Exception("createWithArgsThrowException()");
	}
}

组件工厂

package org.frameworkset.spi.beans.factory;

/**
 * <p>Title: TestFactoryBeanCreate.java</p> 
 * <p>Description: </p>
 * <p>bboss workgroup</p>
 * <p>Copyright (c) 2007</p>
 * @Date 2011-1-14 上午10:13:31
 * @author biaoping.yin
 * @version 1.0
 */
public class TestFactoryBeanCreate {
	private String factorydata1;
	private String factorydata2;
	public TestBean createNoArgs()
	{
		return new TestBean();
	}
	
	public TestBean createWithArgs(String name,int id)
	{
		return new TestBean( name,id);
	}
	
	
	public TestBean createNoArgsThrowException() throws Exception
	{
		throw new Exception("createNoArgsThrowException " );
	}
	
	public TestBean createWithArgsThrowException(String name,id：" + id );
	}
	

	public String getFactorydata1() {
		return factorydata1;
	}

	public void setFactorydata1(String factorydata1) {
		this.factorydata1 = factorydata1;
	}

	public String getFactorydata2() {
		return factorydata2;
	}

	public void setFactorydata2(String factorydata2) {
		this.factorydata2 = factorydata2;
	}
}

5.工厂类实例方法模式
以hessian客户端作为示例来说明这种模式的使用方法，先看例子：

通过bboss-ioc 工厂类实例方法模式配置和获取客户端

<property name="clientservice" factory-class="com.caucho.hessian.client.HessianProxyFactory" 
					f:connectionTimeout="360000"
					f:readTimeout="36000"
					factory-method="create">
					<construction>
						<property value="org.frameworkset.spi.remote.hession.server.ServiceInf"/>		
						<property value="http://localhost:8080/context/hessian?service=basicservice"/>	
					</construction>
				</property>

获取客户端:

DefaultApplicationContext context = DefaultApplicationContext.getApplicationContext("org/frameworkset/spi/remote/hession/client/hessian-client.xml");
				//获取客户端组件实例
				ServiceInf basic = context.getTBeanObject("clientservice",ServiceInf.class);

说明：bboss-ioc 首先创建HessianProxyFactory的实例，然后设置这实例的connectionTimeout和readTimeout两个属性的值，最后调用工厂实例的create方法（传入serviceInterface和serviceAdress两个参数）获取组件实例（hessian客户端代理实例）。
6.测试用例

package org.frameworkset.spi.beans.factory;

import org.frameworkset.spi.ApplicationContext;
import org.junit.Before;
import org.junit.Test;

/**
 * <p>Title: TestCase.java</p> 
 * <p>Description: </p>
 * <p>bboss workgroup</p>
 * <p>Copyright (c) 2007</p>
 * @Date 2011-1-14 上午11:16:36
 * @author biaoping.yin
 * @version 1.0
 */
public class TestCase {
	ApplicationContext context ;
	@Before
	public void initContext()
	{
		context = ApplicationContext.getApplicationContext("org/frameworkset/spi/beans/factory/factorybean.xml");
		
	}
	@Test
	public void runCase()
	{
		TestBean bean =  (TestBean) context.getBeanObject("testbeanCreateNoArgs");
		TestBean bean1 =  (TestBean) context.getBeanObject("testbeanCreateByArgs");
		TestBean bean2 =  (TestBean) context.getBeanObject("staticTestbeanCreateByArgs");
		TestBean bean3 =  (TestBean) context.getBeanObject("staticTestbeanCreateNoArgs");
	}
	
	@Test
	public void runExceptionCase()
	{
		try {
			TestBean bean = (TestBean) context
					.getBeanObject("testbeanCreateNoArgsThrowException");
		} catch (Exception e) {
			e.printStackTrace();
		}
		try {
			TestBean bean1 = (TestBean) context
					.getBeanObject("testbeanCreateByArgsThrowException");
		} catch (Exception e) {
			e.printStackTrace();
		}
		try {
			TestBean bean2 = (TestBean) context
					.getBeanObject("staticTestbeanCreateByArgsThrowException");
		} catch (Exception e) {
			e.printStackTrace();
		}
		try {
			TestBean bean3 = (TestBean) context
					.getBeanObject("staticTestbeanCreateNoArgsThrowException");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

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