ESB初步配置文件认识

每个项目的都有各自的场景，但是其实往小处说，场景的处理基本都是很相似，之前做copy文件的程序，其实就是一种很常见的ETL的过程(转移文件，异构系统通过文件系统交换数据，存在数据同步)。

了解一下ETL：就是数据转移的一个处理过程（A库与B库之间进行数据抽取）---最重要就是格式的转换。

了解一下ESB，专门的数据处理中心的平台系统（建立一个数据中心，对外提高数据服务）。

开源ESB平台：Mule,Spring Intergation

　　　　　　 数据源:DB,FTP,File,Socket,HTTP,JMS

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mule例子：拷贝文件

File数据源：
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:file="http://www.mulesoft.org/schema/mule/file"
    xmlns:tracking="http://www.mulesoft.org/schema/mule/ee/tracking" xmlns="http://www.mulesoft.org/schema/mule/core"
    xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
    xmlns:spring="http://www.springframework.org/schema/beans" version="EE-3.4.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/file http://www.mulesoft.org/schema/mule/file/current/mule-file.xsd
http://www.mulesoft.org/schema/mule/ee/tracking http://www.mulesoft.org/schema/mule/ee/tracking/current/mule-tracking-ee.xsd">
    <file:connector name="FileConnector" streaming="true"
        pollingFrequency="5000">
        <file:expression-filename-parser />
    </file:connector>
    <model name="FileDataChange">
        <service name="fileService">
            <inbound>
                <file:inbound-endpoint path="c:/data/snapshot" />
            </inbound>
            <outbound>
                <pass-through-router>
                    <file:outbound-endpoint path="c:/data/archive"  outputPattern="#[message.inboundProperties['originalFilename']]"/>
                </pass-through-router>
            </outbound>
        </service>
    </model>
</mule>
概念：连接器、端点、轮询器（队列轮询机制）
控制台数据源
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Spring integration配置文件例子（借鉴cafe例子写）
<?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:int="http://www.springframework.org/schema/integration"
    xmlns:int-file="http://www.springframework.org/schema/integration/file"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans.xsd
                        http://www.springframework.org/schema/integration
                        http://www.springframework.org/schema/integration/spring-integration.xsd
                        http://www.springframework.org/schema/integration/file
                        http://www.springframework.org/schema/integration/file/spring-integration-file.xsd">
    
    <!-- Spring 框架组件的挂节点（gateway,spliter,fliter,transformer,router,service-activator,aggregator,adapter,channel） -->
    <bean id="tools" class="com.yyb.test.ite.OrderTools"></bean>
    
    <!-- 轮询器 -->
    <int:poller id="poller" default="true" fixed-rate="1000"/>

    <!-- 数据采集的源端 -->
    <int:gateway id="cafe" service-interface="com.yyb.test.ite.IOrderService" />

    <!-- 数据采集的通道 -->
    <int:channel id="orders" />
    
    <int:header-enricher input-channel="orders" output-channel="addHeader_orders" >
        <int:header name="type" value="cofe_china"/>
    </int:header-enricher>
    <int:channel id="addHeader_orders" />
    
    <int:filter input-channel="addHeader_orders" output-channel="after_orders" ref="tools" method="filterOrder"/>

    <int:channel id="after_orders" />
    
    <!-- 通道数据的切割器 -->
    <int:splitter input-channel="after_orders" ref="tools"
        method="spliteOrder" output-channel="drinks" />

    <!-- 第二个数据通道 -->    
    <int:channel id="drinks"/>
    
    <!-- 通道数据路由器 -->        
    <int:router input-channel="drinks" ref="tools"
        method="routerOrder" />

    <!-- 通道一 -->
    <int:channel id="coldDrinks">
        <int:queue capacity="10" />
    </int:channel>
    <!-- 挂接在通道上的服务激活器 -->
    <int:service-activator input-channel="coldDrinks"
        ref="tools" method="service_01" output-channel="preparedDrinks" />

    <!-- 通道二 -->
    <int:channel id="hotDrinks">
        <int:queue capacity="10" />
    </int:channel>
    <!-- 挂接在通道上的服务激活器 -->
    <int:service-activator input-channel="hotDrinks"
        ref="tools" method="service_02" output-channel="preparedDrinks" />

    <!-- 通道 -->
    <int:channel id="preparedDrinks" />
    <!-- 数据聚合器 -->
    <int:aggregator input-channel="preparedDrinks" ref="tools"
        method="completeOrder" output-channel="deliveries" />

    <!-- 数据转换器 -->
    <int:transformer input-channel="deliveries"
        output-channel="successOrder" ref="tools" method="orderTransString"/>

    <!-- 输出通道 -->
    <int:channel id="successOrder" />        
    
    <!-- 数据源目的端 采用文件讲数据保存 形成数据落地 -->
    <int-file:outbound-channel-adapter
        channel="successOrder" directory="c:/b"></int-file:outbound-channel-adapter>
    
</beans>

//数据接收端
public interface IOrderService {
    @Gateway(requestChannel="orders")
    public void orderFood(Order order);
}

package com.yyb.test.ite;

import java.util.List;

import org.springframework.integration.annotation.Aggregator;
import org.springframework.integration.annotation.Filter;
import org.springframework.integration.annotation.Header;
import org.springframework.integration.annotation.Headers;
import org.springframework.integration.annotation.Payload;
import org.springframework.integration.annotation.Router;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.integration.annotation.Splitter;
import org.springframework.integration.annotation.Transformer;

//组件挂接点（扩张点）--实现自己的业务对其组件扩展
public class OrderTools {
    
    @Transformer
    public String orderTransString(@Payload Order order) {
        return order.toString();
    }
    
    @Filter
    public boolean filterOrder(@Header String type) {
        System.out.println(type);
        return true;
    }
    
    @Router
    public String routerOrder( @Payload OrderItem order) {
        System.out.println(order);
        return order.getType();
    }
    
    @Splitter
    public List spliteOrder(Order order) {
        return order.getItems();
    }
    
    @Aggregator
    public Order completeOrder(List<OrderItem> items) {
        Order order = new Order();
        order.setUserName("tty");
        order.setOrderName("ppi");
        order.setItems(items);
        return order;
    }
    
　　//挂接自己的业务实现
    @ServiceActivator
    public OrderItem service_01(@Payload OrderItem orderItem) {
        System.out.println("service_01=" + orderItem.toString());
        return orderItem;
    }
    
　　 //挂接自己的业务实现
    @ServiceActivator
    public OrderItem service_02(@Payload OrderItem orderItem) {
        System.out.println("service_02=" + orderItem.toString());
        return orderItem;
    }
    
    @Transformer
    public OrderItem transStringToObject(@Payload  OrderItem order) {
        return null;
    }
}

public class Order {

    private String orderName;
    private String orderId;
    private String userName;

    private List<OrderItem> items;
}
public class OrderItem {

    private String name;
    private String type;
}
//省略get set

public static void main(String[] args) {

        ApplicationContext context = new ClassPathXmlApplicationContext("spring-cafe.xml");
        IOrderService service = (IOrderService) context.getBean("cafe");
        
        
        Order order = new Order();
        order.setUserName("yyg");
        order.setOrderName("一份辣子鸡");
        order.setOrderId("001");
        
        OrderItem item01 = new OrderItem();
        item01.setName("鸡汤一碗");
        item01.setType("coldDrinks");
        
        OrderItem item02 = new OrderItem();
        item02.setName("一知排骨");
        item02.setType("hotDrinks");
        
        List<OrderItem> items = new ArrayList<OrderItem>();
        
        items.add(item01);
        items.add(item02);
        
        order.setItems(items);
        
        service.orderFood(order );//添加数据到通道
        
    }