paulwong

spring integration同步数据库数据

需求为：当客户已有系统的数据被同步到我方数据库后，若再有新数据，只同步新数据到我方数据库。解决：因为客户的业务表是不能变动的，我方在客户数据库中新建一状态表，记录哪些数据被更新过。
当客户业务表有新数据插入时，用触发器将新数据id插入到状态表。

为方便实例：业务表pp，状态表status
结构为：
pp：
CREATE TABLE `pp` (
  `name` varchar(255) default NULL,
  `address` varchar(255) default NULL,
  `id` int(11) NOT NULL auto_increment,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8;

status：

CREATE TABLE `status` (
  `id` int(11) NOT NULL auto_increment,
  `status` varchar(255) default 'new',
  `ppid` int(11) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8;


触发器：
DROP TRIGGER if EXISTS mytrigger
CREATE TRIGGER mytrigger after INSERT on pp
for EACH ROW
BEGIN
 INSERT into `status`(ppid) values(new.id);
END;


核心配置：jdbc-inbound-context.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:int="http://www.springframework.org/schema/integration" 
       xmlns:int-jdbc="http://www.springframework.org/schema/integration/jdbc"    
       xmlns:int-jms="http://www.springframework.org/schema/integration/jms" 
       xmlns:jdbc="http://www.springframework.org/schema/jdbc" 
       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/integration 
    http://www.springframework.org/schema/integration/spring-integration-2.0.xsd 
    http://www.springframework.org/schema/integration/jdbc 
    http://www.springframework.org/schema/integration/jdbc/spring-integration-jdbc-2.0.xsd 
    http://www.springframework.org/schema/jdbc 
    http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
     http://www.springframework.org/schema/integration/jms 
    http://www.springframework.org/schema/integration/jms/spring-integration-jms-2.0.xsd">
    <context:component-scan base-package="com.wisely.inbound"/>
     
    <int:channel id="target"/>
    
    <int-jdbc:inbound-channel-adapter channel="target" 
                    data-source="dataSource"
                    query="select p.id as ppid,p.name as ppname from pp p,status s where p.id=s.ppid and s.status='new'"
                    update="update status as st set st.status='old' where ppid in (:ppid)"
                                       >
        <!-- 每隔多少毫秒去抓取 -->
        <int:poller fixed-rate="5000" >
            <int:transactional/>
        </int:poller>
        <!--  指定时刻抓取
        <int:poller max-messages-per-poll="1">
            <int:transactional/>
            <int:cron-trigger expression="0 0 3 * * ?"/>
        </int:poller>
        -->
    </int-jdbc:inbound-channel-adapter>
    <int:service-activator input-channel="target" ref="jdbcMessageHandler"/>     
     <context:property-placeholder location="classpath*:META-INF/spring/*.properties"/>
     <bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="dataSource">
        <property name="driverClassName" value="${database.driverClassName}"/>
        <property name="url" value="${database.url}"/>
        <property name="username" value="${database.username}"/>
        <property name="password" value="${database.password}"/>
    </bean>   
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>    
   </beans>


JdbcMessageHandler：
package com.wisely.inbound.jdbc;

import java.util.List;
import java.util.Map;

import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.stereotype.Component;

@Component
public class JdbcMessageHandler {
    @ServiceActivator
    public void handleJdbcMessage(List<Map<String ,Object>> message){
        for(Map<String,Object> resultMap:message){
            System.out.println("组:");
            for(String column:resultMap.keySet()){
                System.out.println("字段:"+column+" 值:"+resultMap.get(column));
            }
        }
    }
}


测试类：
package com.wisely.inbound.jdbc;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class JdbcInbound {

    /**
     * @param args
     */
    public static void main(String[] args) {
          ApplicationContext context = 
                    new ClassPathXmlApplicationContext("/META-INF/spring/jdbc-inbound-context.xml");
    }

}


若将channel改为jms的通道。配置文件做以下修改：
<?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:int="http://www.springframework.org/schema/integration" 
       xmlns:int-jdbc="http://www.springframework.org/schema/integration/jdbc"    
       xmlns:int-jms="http://www.springframework.org/schema/integration/jms" 
       xmlns:jdbc="http://www.springframework.org/schema/jdbc" 
       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/integration 
    http://www.springframework.org/schema/integration/spring-integration-2.0.xsd 
    http://www.springframework.org/schema/integration/jdbc 
    http://www.springframework.org/schema/integration/jdbc/spring-integration-jdbc-2.0.xsd 
    http://www.springframework.org/schema/jdbc 
    http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
     http://www.springframework.org/schema/integration/jms 
    http://www.springframework.org/schema/integration/jms/spring-integration-jms-2.0.xsd">
    <context:component-scan base-package="com.wisely.inbound"/>
     
    <int-jms:channel id="target"  queue-name="jdbc.queue" connection-factory="connectionFactory"/>
    
    <int-jdbc:inbound-channel-adapter channel="target" 
                                      data-source="dataSource"
                                      query="select p.id as ppid,p.name as ppname from pp p,status s where p.id=s.ppid and s.status='new'"
                                      update="update status as st set st.status='old' where ppid in (:ppid)"
                                       >
        <!-- 每隔多少毫秒去抓取 -->
        <int:poller fixed-rate="5000" >
            <int:transactional/>
        </int:poller>
        <!--  指定时刻抓取
        <int:poller max-messages-per-poll="1">
            <int:transactional/>
            <int:cron-trigger expression="0 0 3 * * ?"/>
        </int:poller>
        -->
    </int-jdbc:inbound-channel-adapter>
    <!--  
    <int-jms:message-driven-channel-adapter id="queInbound" destination-name="jmsQueue" channel="target"/>
    -->
    <int:service-activator input-channel="target" ref="jdbcMessageHandler"/>
     
     <context:property-placeholder location="classpath*:META-INF/spring/*.properties"/>
     <bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="dataSource">
        <property name="driverClassName" value="${database.driverClassName}"/>
        <property name="url" value="${database.url}"/>
        <property name="username" value="${database.username}"/>
        <property name="password" value="${database.password}"/>
    </bean>
    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    
    
    <bean id="activeMqConnectionFactory" class="org.apache.activemq.spring.ActiveMQConnectionFactory">
        <property name="brokerURL" value="vm://localhost" />
    </bean>
    
    <bean id="connectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory">
        <property name="sessionCacheSize" value="10" />
        <property name="cacheProducers" value="false"/>
        <property name="targetConnectionFactory" ref="activeMqConnectionFactory"/>
    </bean>
    <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
        <property name="connectionFactory" ref="connectionFactory"/>
        <property name="defaultDestinationName" value="jmsQueue" />
    </bean>
</beans>

转:http://wiselyman.iteye.com/blog/1150495

posted on 2012-10-17 11:50 paulwong 阅读(2320) 评论(1)  编辑  收藏 所属分类: SPRING INTERGRATION

Feedback

# re: spring integration同步数据库数据 2014-07-24 15:18 石因

没有将数据插入到数据库的例子啊！  回复  更多评论   



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