spring integration同步数据库数据

来源：互联网发布：汪精卫为何叛变知乎编辑：程序博客网时间：2024/05/22 06:26

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代码  
<?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：

Java代码  
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：

Java代码  
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代码  
<?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>  
转载地址：http://wiselyman.iteye.com/blog/1150495

0 0