Spring batch学习 详细配置解读(3)

第一篇讲到普通job 配置 那么spring  batch 给我们提供了丰富的配置，包括定时任务，校验，复合监听器，父类，重启机制等。

下面看一个动态设置读取文件的配置

1.动态文件读取

<?xml version="1.0" encoding="UTF-8"?>
<bean:beans xmlns="http://www.springframework.org/schema/batch"
    xmlns:bean="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-2.5.xsd
    http://www.springframework.org/schema/batch
    http://www.springframework.org/schema/batch/spring-batch-2.2.xsd">
    <bean:import resource="classpath:ch04/job-context.xml"/>

    <!-- 账单作业 -->
    <job id="billJob">
        <step id="billStep">
            <tasklet transaction-manager="transactionManager">
                <chunk reader="csvItemReader" writer="csvItemWriter"
                    processor="creditBillProcessor" commit-interval="">
                </chunk>
            </tasklet>
        </step>
    </job>

    <!-- 读取信用卡账单文件,CSV格式 -->
    <bean:bean id="csvItemReader"
        class="org.springframework.batch.item.file.FlatFileItemReader"
        scope="step">
        <bean:property name="resource"
            value="#{jobParameters['inputResource']}"/>  获取动态参数文件
        <bean:property name="lineMapper">
            <bean:bean
                class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
                <bean:property name="lineTokenizer" ref="lineTokenizer"/>
                <bean:property name="fieldSetMapper">
                    <bean:bean class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper">
                        <bean:property name="prototypeBeanName" value="creditBill">
                        </bean:property>
                    </bean:bean>
                </bean:property>
            </bean:bean>
        </bean:property>
    </bean:bean>

    <!-- lineTokenizer -->
    <bean:bean id="lineTokenizer"
        class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
        <bean:property name="delimiter" value=","/>
        <bean:property name="names">
            <bean:list>
                <bean:value>accountID</bean:value>
                <bean:value>name</bean:value>
                <bean:value>amount</bean:value>
                <bean:value>date</bean:value>
                <bean:value>address</bean:value>
            </bean:list>
        </bean:property>
    </bean:bean>

    <!-- 写信用卡账单文件，CSV格式 -->
    <bean:bean id="csvItemWriter"
        class="org.springframework.batch.item.file.FlatFileItemWriter"
        scope="step">
        <bean:property name="resource" value="file:target/ch04/outputFile.csv"/>
        <bean:property name="lineAggregator">
            <bean:bean
                class="org.springframework.batch.item.file.transform.DelimitedLineAggregator">
                <bean:property name="delimiter" value=","></bean:property>
                <bean:property name="fieldExtractor">
                    <bean:bean
                        class="org.springframework.batch.item.file.transform.BeanWrapperFieldExtractor">
                        <bean:property name="names"
                             value="accountID,name,amount,date,address">
                        </bean:property>
                    </bean:bean>
                </bean:property>
            </bean:bean>
        </bean:property>
    </bean:bean>

    <bean:bean id="creditBill" scope="prototype"
        class="com.juxtapose.example.ch04.CreditBill">
    </bean:bean>
    <bean:bean id="creditBillProcessor" scope="step"   给定生命周期 只在当前步骤
        class="com.juxtapose.example.ch04.CreditBillProcessor">
    </bean:bean>
</bean:beans>

下面看测试类。 省略基础配置和实体。

import java.util.Date;

import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobParametersBuilder;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class JobLaunchStepScope {

	/**
	 * 执行批处理作业.<br>
	 * @param jobPath	作业配置文件
	 * @param jobName	作业名
	 * @param builder	作业参数构造器
	 */
	public static void executeJob(String jobPath, String jobName, JobParametersBuilder builder) {
		ApplicationContext context = new ClassPathXmlApplicationContext(jobPath);
		JobLauncher launcher = (JobLauncher) context.getBean("jobLauncher");
		Job job = (Job) context.getBean(jobName);
		try {
			JobExecution result = launcher.run(job, builder.toJobParameters());
			System.out.println(result.toString());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * @param args
	 */
//  adddString 添加一个参数 在配置文件读取
	public static void main(String[] args) {
		executeJob("ch04/job/job-stepscope.xml", "billJob",
				new JobParametersBuilder().addDate("date", new Date())
				.addString("inputResource", "classpath:ch04/data/credit-card-bill-201303.csv"));
	}
}

　　2.继承父类，包括监听，自定义自己监听。包括方便结合定时

<!-- 异步作业调度器 -->

<task:executor id="executor" pool-size="1" />
<bean:bean id="jobLauncherAsyn"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<bean:property name="jobRepository" ref="jobRepository"/>
<bean:property name="taskExecutor" ref="executor" />
</bean:bean>

<task:scheduler id="scheduler" pool-size="10" /> 开启定时

<!-- 每一秒钟，执行对象schedulerLauncher的launch方法一次 -->
<task:scheduled-tasks scheduler="scheduler">
<task:scheduled ref="schedulerLauncher" method="launch" fixed-rate="1000" />
</task:scheduled-tasks>

<bean:bean id="schedulerLauncher"
class="com.juxtapose.example.ch04.scheduler.SchedulerLauncher">
<bean:property name="job" ref="helloworldJob" />
<bean:property name="jobLauncher" ref="jobLauncher" />
</bean:bean>

<!-- 参数校验 --> 采用默认校验 传入的时候必须携带date参数。最多传入两个

还有一个类支持一组校验 compositionJobParametersValitor
<bean:bean id="validator" class="org.springframework.batch.core.job.DefaultJobParametersValidator" >
<bean:property name="requiredKeys" >
<bean:set>
<bean:value>date</bean:value>
</bean:set>
</bean:property>
<bean:property name="optionalKeys" >
<bean:set>
<bean:value>name</bean:value>
</bean:set>
</bean:property>
</bean:bean>

//省略头    
<!-- 抽象基础Job  与java中类似-->
    <job id="baseJob" abstract="true"> //定义父类监听 注意abstract
        <listeners>
            <listener ref="sysoutListener"></listener>
        </listeners>
    </job>
    <!-- 账单作业 -->
    <job id="billJob" parent="baseJob">
        <step id="billStep">
            <tasklet transaction-manager="transactionManager">
                <chunk reader="csvItemReader" writer="csvItemWriter"
                    processor="creditBillProcessor" commit-interval="">
                </chunk>
            </tasklet>
        </step>
        <listeners merge="true"> //代表可以一起使用 但是如果监听异常 执行会返回失败
            <listener ref="sysoutAnnotationListener"></listener>
        </listeners>
    </job>

    <!-- 读取信用卡账单文件,CSV格式 -->
    <bean:bean id="csvItemReader"
        class="org.springframework.batch.item.file.FlatFileItemReader"
        scope="step">
        <bean:property name="resource"
            value="classpath:ch04/data/credit-card-bill-201303.csv"/>
        <bean:property name="lineMapper">
            <bean:bean
                class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
                <bean:property name="lineTokenizer" ref="lineTokenizer"/>
                <bean:property name="fieldSetMapper">
                    <bean:bean class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper">
                        <bean:property name="prototypeBeanName" value="creditBill">
                        </bean:property>
                    </bean:bean>
                </bean:property>
            </bean:bean>
        </bean:property>
    </bean:bean>

    <!-- lineTokenizer -->
    <bean:bean id="lineTokenizer"
        class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
        <bean:property name="delimiter" value=","/>
        <bean:property name="names">
            <bean:list>
                <bean:value>accountID</bean:value>
                <bean:value>name</bean:value>
                <bean:value>amount</bean:value>
                <bean:value>date</bean:value>
                <bean:value>address</bean:value>
            </bean:list>
        </bean:property>
    </bean:bean>

    <!-- 写信用卡账单文件，CSV格式 -->
    <bean:bean id="csvItemWriter"
        class="org.springframework.batch.item.file.FlatFileItemWriter"
        scope="step">
        <bean:property name="resource" value="file:target/ch04/outputFile.csv"/>
        <bean:property name="lineAggregator">
            <bean:bean
                class="org.springframework.batch.item.file.transform.DelimitedLineAggregator">
                <bean:property name="delimiter" value=","></bean:property>
                <bean:property name="fieldExtractor">
                    <bean:bean
                        class="org.springframework.batch.item.file.transform.BeanWrapperFieldExtractor">
                        <bean:property name="names"
                             value="accountID,name,amount,date,address">
                        </bean:property>
                    </bean:bean>
                </bean:property>
            </bean:bean>
        </bean:property>
    </bean:bean>

    <bean:bean id="creditBill" scope="prototype"
        class="com.juxtapose.example.ch04.CreditBill">
    </bean:bean>
    <bean:bean id="creditBillProcessor" scope="step"
        class="com.juxtapose.example.ch04.CreditBillProcessor">
    </bean:bean>
    <bean:bean id="sysoutListener"
        class="com.juxtapose.example.ch04.listener.SystemOutJobExecutionListener">
    </bean:bean>
    <bean:bean id="sysoutAnnotationListener"
        class="com.juxtapose.example.ch04.listener.SystemOut">
    </bean:bean>

使用的实体

import java.util.Map;

import org.springframework.batch.core.JobParameter;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.repeat.RepeatStatus;

public class HelloWorldTasklet implements Tasklet {

    /* (non-Javadoc)
     * @see org.springframework.batch.core.step.tasklet.Tasklet#execute(org.springframework.batch.core.StepContribution, org.springframework.batch.core.scope.context.ChunkContext)
     */
    public RepeatStatus execute(StepContribution contribution,
            ChunkContext chunkContext) throws Exception {
        String jobName = chunkContext.getStepContext().getJobName();
        System.out.println("Execute job :" + jobName +".");
        JobParameters jobParameters = chunkContext.getStepContext().getStepExecution().getJobParameters();
        System.out.println("JobParameters:" + jobParameterToString(jobParameters));
        return RepeatStatus.FINISHED;
    }

    /**
     * 转换为String类型格式.<br>
     * @param jobParameters
     * @return
     */
    private String jobParameterToString(JobParameters jobParameters){
        StringBuffer sb = new StringBuffer();
        for(Map.Entry<String, JobParameter> param : jobParameters.getParameters().entrySet()) {
            sb.append(String.format(
                "%s = %s (%s);",
                param.getKey(),param.getValue().getValue(),param.getValue().getType()
            ));
        }
        return sb.toString();
    }

}

接下来看下基础配置中的参数值

回顾下基础参数 包含三个类

jobRepository  作业工厂

datasource 数据源 当选择持久化是需要

transactionManager 事务管理器

jobLauncher job执行者

先从jobrespository说起 摘自springbatch一书

ItemReader  流读取摘自书本

ItemProcessor 对读取数据处理 比如清晰转换校验等

itemwriter

job说明

子元素

我偷懒了 对不起。。。