spring httpinvoker https -

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spring httpinvoker https

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spring

Spring HttpInvoke，一种较为常用的、基于Spring架构的服务器之间的远程调用实现，可以说是轻量级的RMI

1.在web.xml配置spring 并添加对应的spring配置文件

<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<servlet>   
   
        <servlet-name>service</servlet-name>   
   
        <servlet-class>   
   
            org.springframework.web.servlet.DispatcherServlet    
   
        </servlet-class>   
   
        <load-on-startup>1</load-on-startup>   
   
    </servlet>   
   
     
   
    <servlet-mapping>   
   
        <servlet-name>service</servlet-name>   
   
        <url-pattern>/service/*</url-pattern>   
   
    </servlet-mapping>

对应的需要添加 service-servlet.xml

<?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:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
	xmlns:mvc="http://www.springframework.org/schema/mvc"

	xsi:schemaLocation="http://www.springframework.org/schema/beans   
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd   
           http://www.springframework.org/schema/context   
           http://www.springframework.org/schema/context/spring-context-3.0.xsd   
           http://www.springframework.org/schema/tx   
           http://www.springframework.org/schema/tx/spring-tx-3.0.xsd   
           http://www.springframework.org/schema/jdbc   
           http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

	

</beans>

2.首先定义接口

public interface UserService {   
  
   
    User getUser(String username);   
}

3.定义返回的model

用户类，注意实现Serializable接口，这是执行远程调用传递数据对象的第一要求——数据对象必须实现Serializable接口，因为，要执行序列化/反序列化操作！

public class User implements Serializable {   
  
    private static final long serialVersionUID = 5590768569302443813L;   
    private String username;   
    private Date birthday;   
  

    public User(String username, Date birthday) {   
        this.username = username;   
        this.birthday = birthday;   
    }   

    @Override  
    public String toString() {   
        return String.format("%s\t%s\t", username, birthday);   
    }   
}

4. userservice 实现

public class UserServiceImpl implements UserService {   
    private Logger logger = Logger.getLogger(UserServiceImpl.class);   
  
       @Override  
    public User getUser(String username) {   
        if (logger.isDebugEnabled()) {   
            logger.debug("username:[" + username + "]");   
        }   
        User user = new User(username, new Date());   
        if (logger.isDebugEnabled()) {   
            logger.debug("user:[" + user + "]");   
        }   
        return user;   
    }   
  
}

5.发不成http服务

<?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:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
	xmlns:mvc="http://www.springframework.org/schema/mvc"

	xsi:schemaLocation="http://www.springframework.org/schema/beans   
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd   
           http://www.springframework.org/schema/context   
           http://www.springframework.org/schema/context/spring-context-3.0.xsd   
           http://www.springframework.org/schema/tx   
           http://www.springframework.org/schema/tx/spring-tx-3.0.xsd   
           http://www.springframework.org/schema/jdbc   
           http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

	<bean id="httpService"
		class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">
		<property name="service" ref="userService" />
		<property name="serviceInterface" value="com.mpupa.service.IUserService" />
	</bean>

	<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				<prop key="/httpService">httpService</prop>
			</props>
		</property>
	</bean>

</beans>

6.客户端调用

首先要把 IUserService接口以及需要返回的Model放到客户端，打jar包或者直接把类拷贝过去

然后配置 bean

<bean id="httpService" class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
		<property name="serviceUrl">
			<value> https://apps.dotter.me/consumer/service/userHttpService
			</value>
		</property>
		<property name="serviceInterface" value="com.mpupa.service.IUserService">
		</property>
</bean>

在java类里调用

@Resource(name="httpService")
	IUserService userService;
User user = userService.getUser("test");

7.优化

如果我们这样写，其实默认调用了SimpleHttpInvokerRequestExecutor做实现，这个实现恐怕只能作为演示来用！
这也是效率问题所在！！！
为提高效率，应该通过Commons-HttpClient！
我们需要做什么？导入这个jar，改改xml就行！

<bean id="httpService"
		class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
		<property name="serviceUrl">
			<value> https://apps.dotter.me/consumer/service/userHttpService
			</value>
		</property>
		<property name="serviceInterface" value="com.mpupa.service.IUserService">
		</property>
		<property name="httpInvokerRequestExecutor">
	        <bean class="org.springframework.remoting.httpinvoker.CommonsHttpInvokerRequestExecutor">
	            <property name="readTimeout" value="5000" />
	            <property name="connectTimeout" value="5000" />
	        </bean>
   		 </property>
	</bean>

或者

<bean id="httpService"
		class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
		<property name="serviceUrl">
			<value> https://apps.dotter.me/consumer/service/userHttpService
			</value>
		</property>
		<property name="serviceInterface" value="com.mpupa.service.IUserService">
		</property>
		<property  
        name="httpInvokerRequestExecutor">  
        <ref  
            bean="httpInvokerRequestExecutor" />  
    </property>  

	</bean>

<bean  
    id="httpInvokerRequestExecutor" class="org.springframework.remoting.httpinvoker.CommonsHttpInvokerRequestExecutor">  
    <property  
        name="httpClient">  
        <bean  
            class="org.apache.commons.httpclient.HttpClient">  
            <property  
                name="connectionTimeout"  
                value="2000" />  
            <property  
                name="timeout"  
                value="5000" />  
        </bean>  
    </property>  
</bean>

这时，转为org.springframework.remoting.httpinvoker.CommonsHttpInvokerRequestExecutor实现了！,通过HttpClient，我们可以配置超时时间timeout和连接超时connectionTimeout两个属性，这样，服务器执行操作时，如果超时就可以强行释放连接，这样可怜的tomcat不会因为HttpInvoke连接不释放而被累死！

还可以控制线程数

<bean  
        id="httpInvokerRequestExecutor"  
        class="org.springframework.remoting.httpinvoker.CommonsHttpInvokerRequestExecutor">  
        <property  
            name="httpClient">  
            <bean  
                class="org.apache.commons.httpclient.HttpClient">  
                <property  
                    name="connectionTimeout"  
                    value="2000" />  
                <property  
                    name="timeout"  
                    value="5000" />  
                <property  
                    name="httpConnectionManager">  
                    <ref  
                        bean="multiThreadedHttpConnectionManager" />  
                </property>  
            </bean>  
        </property>  
    </bean>  
    <bean  
        id="multiThreadedHttpConnectionManager"  
        class="org.apache.commons.httpclient.MultiThreadedHttpConnectionManager">  
        <property  
            name="params">  
            <bean  
                class="org.apache.commons.httpclient.params.HttpConnectionManagerParams">  
                <property  
                    name="maxTotalConnections"  
                    value="600" />  
                <property  
                    name="defaultMaxConnectionsPerHost"  
                    value="512" />  
            </bean>  
        </property>  
    </bean>

改用MultiThreadedHttpConnectionManager，多线程！！！
测试就不说了，实践证明：
默认实现，服务器平均10s左右才能响应一个请求。
多线程实现，服务器平均20ms左右响应一个请求。
这简直不是一个数量级！！！

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