SpringBatch批处理框架+mysql仓库+web监控实录

1、概念

Spring Batch 是一款轻量级地适合企业级应用的批处理框架，值得注意的是，不同于其他调度框架，Spring Batch不提供调度功能。

2、批处理过程

批处理可以分为以下几个步骤：

1. 读取数据
2. 按照业务处理数据
3. 归档数据的过程

3、Spring Batch给我们提供了什么？

1. 统一的读写接口
2. 丰富的任务处理方式
3. 灵活的事务管理及并发处理
4. 日志、监控、任务重启与跳过等特性

4、基础组件

5、job, step, tasklet 和 chunk 关系

一个job对应至少一个step，一个step对应0或者1个TaskLet，一个taskLet对应0或者1个Chunk

6、实战：批处理excel插入数据库

6.1：定义数据仓库

  <!-- 内存仓库  -->
    <!--<bean id="jobRepository" class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean"/>-->

    <!-- 数据库仓库  -->
    <batch:job-repository id="jobRepository" data-source="dataRepDruidDataSource"
                          isolation-level-for-create="SERIALIZABLE" transaction-manager="transactionManager"
                          table-prefix="BATCH_" max-varchar-length="1000" />

6.2：定义启动器

    <!-- 作业调度器，用来启动job,引用作业仓库 -->
    <bean id="jobLauncher"
          class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
        <property name="jobRepository" ref="jobRepository"/>
    </bean>

6.3：定义JOB

    <batch:job id="userBatchJobName" restartable="true">
        <batch:step id="userStep">
            <batch:tasklet allow-start-if-complete="false"
                           start-limit="1" task-executor="taskExecutor" throttle-limit="5">
                <batch:chunk reader="userReader" writer="userWriter"
                             processor="userProcessor" commit-interval="5" retry-limit="10">
                    <batch:retryable-exception-classes>
                        <batch:include class="org.springframework.dao.DuplicateKeyException"/>
                        <batch:include class="java.sql.BatchUpdateException"/>
                        <batch:include class="java.sql.SQLException"/>
                    </batch:retryable-exception-classes>
                </batch:chunk>
            </batch:tasklet>
        </batch:step>
    </batch:job>

    <bean id="taskExecutor"
          class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
        <!-- 线程池维护线程的最少数量 -->
        <property name="corePoolSize" value="100"/>
        <!-- 线程池维护线程所允许的空闲时间 -->
        <property name="keepAliveSeconds" value="30000"/>
        <!-- 线程池维护线程的最大数量 -->
        <property name="maxPoolSize" value="300"/>
        <!-- 线程池所使用的缓冲队列 -->
        <property name="queueCapacity" value="100"/>
    </bean>

6.4：定义ItemReader

     <bean id="userReader" class="org.springframework.batch.item.file.FlatFileItemReader">
        <property name="lineMapper" ref="lineMapper"/>
        <property name="resource" value="classpath:message/batch-data-source.csv"/>
    </bean>

 <!-- 将每行映射成对象 -->
    <bean id="lineMapper" class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
        <property name="lineTokenizer">
            <bean class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
                <property name="delimiter" value=","/><!-- 根据某种分隔符分割 -->
                <property name="names" value="id,name" />
            </bean>
        </property>
        <property name="fieldSetMapper"><!-- 将拆分后的字段映射成对象 -->
            <bean class="com.hcw.core.batch.UserFieldSetMapper" />
        </property>
    </bean>

6.5：定义ItemWriter

     <bean id="userWriter" class="com.hcw.core.batch.MyBatchItemWriter" scope="step">
        <property name="statementId" value="com.hcw.core.batch.dao.UserToMapper.batchInsert"/>
        <property name="sqlSessionFactory" ref="sqlSessionFactoryTo"/>
    </bean>

6.6：定义ItemProcessor

    <bean id="userProcessor" class="com.hcw.core.batch.UserItemProcessor"/>

6.7: 定义jobRepository的数据源

   <bean id="dataRepDruidDataSource" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <property name="url" value="${jdbc.mysql.rep.connection.url}" />
        <property name="username" value="${jdbc.mysql.rep.connection.username}" />
        <property name="password" value="${jdbc.mysql.rep.connection.password}" />
        <property name="filters" value="${jdbc.mysql.rep.connection.filters}" />
        <property name="maxActive" value="${jdbc.mysql.rep.connection.maxActive}" />
        <property name="initialSize" value="${jdbc.mysql.rep.connection.initialSize}" />
        <property name="maxWait" value="${jdbc.mysql.rep.connection.maxWait}" />
        <property name="minIdle" value="${jdbc.mysql.rep.connection.minIdle}" />
        <property name="timeBetweenEvictionRunsMillis"
                  value="${jdbc.mysql.rep.connection.timeBetweenEvictionRunsMillis}" />
        <property name="minEvictableIdleTimeMillis"
                  value="${jdbc.mysql.rep.connection.minEvictableIdleTimeMillis}" />
        <property name="validationQuery"
                  value="${jdbc.mysql.rep.connection.validationQuery}" />
        <property name="testWhileIdle"
                  value="${jdbc.mysql.rep.connection.testWhileIdle}" />
        <property name="testOnBorrow" value="${jdbc.mysql.rep.connection.testOnBorrow}" />
        <property name="testOnReturn" value="${jdbc.mysql.rep.connection.testOnReturn}" />
        <property name="poolPreparedStatements"
                  value="${jdbc.mysql.rep.connection.poolPreparedStatements}" />
        <property name="maxPoolPreparedStatementPerConnectionSize"
                  value="${jdbc.mysql.rep.connection.maxPoolPreparedStatementPerConnectionSize}" />
    </bean>

6.8: 启动JOB

启动tomcat,打开启动页面

原文地址：https://blog.51cto.com/14570694/2469184