需求為：當客戶已有系統(tǒng)的數(shù)據(jù)被同步到我方數(shù)據(jù)庫后，若再有新數(shù)據(jù)，只同步新數(shù)據(jù)到我方數(shù)據(jù)庫。解決：因為客戶的業(yè)務表是不能變動的，我方在客戶數(shù)據(jù)庫中新建一狀態(tài)表，記錄哪些數(shù)據(jù)被更新過。
當客戶業(yè)務表有新數(shù)據(jù)插入時，用觸發(fā)器將新數(shù)據(jù)id插入到狀態(tài)表。
為方便實例：業(yè)務表pp，狀態(tài)表status
結構為：
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;觸發(fā)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>
<!-- 指定時刻抓取
<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("組:");
for(String column:resultMap.keySet()){
System.out.println("字段:"+column+" 值:"+resultMap.get(column));
}
}
}
} 測試類：
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");
}
} 若將channel改為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>
<!-- 指定時刻抓取
<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> 轉:
http://wiselyman.iteye.com/blog/1150495