In this tutorial, we will show you how to use the Quartz scheduler framework to schedule a Spring batch job to run every 10 seconds. Tools and libraries used Maven 3 Eclipse 4.2 JDK 1.6 Spring Core 3.2.2.RELEASE Spring Batch 2.2.0.RELEASE Quartz 1.8.6 The relationship looks like the following : Spring Batch <–> Spring QuartzJobBean […]
Spring Batch is a framework for batch processing – execution of a series of jobs. In Spring Batch, A job consists of many steps and each step consists of a READ-PROCESS-WRITE task or single operation task (tasklet). For “READ-PROCESS-WRITE” process, it means “read” data from the resources (csv, xml or database), “process” it and “write” […]
In this tutorial, we will show you how to use Spring TaskScheduler to schedule a batch job to run every 5 seconds. Tools and libraries used Maven 3 Eclipse 4.2 JDK 1.6 Spring Core 3.2.2.RELEASE Spring Batch 2.2.0.RELEASE 1. Project Directory Structure A standard Maven project. 2. Spring TaskScheduler Spring 3.0 introduces a TaskScheduler for […]
Photo Credit : Spring Source In Spring Batch, “Partitioning” is “multiple threads to process a range of data each”. For example, assume you have 100 records in a table, which has “primary id” assigned from 1 to 100, and you want to process the entire 100 records. Normally, the process starts from 1 to 100, […]
In this tutorial, we will show you how to read data from a MySQL database, with JdbcCursorItemReader and JdbcPagingItemReader, and write it into an XML file. Tools and libraries used Maven 3 Eclipse 4.2 JDK 1.6 Spring Core 3.2.2.RELEASE Spring OXM 3.2.2.RELEASE Spring Batch 2.2.0.RELEASE MySQL Java Driver 5.1.25 P.S This example – MySQL jdbc […]
In Spring batch, there are six “listeners” to intercept the step execution, I believe the class name should be self-explanatory. StepExecutionListener ItemReadListener ItemProcessListener ItemWriteListener ChunkListener SkipListener 1. Listener Example Three listener examples, do nothing but print out a message. CustomStepListener.java package com.mkyong.listeners; import org.springframework.batch.core.ExitStatus; import org.springframework.batch.core.StepExecution; import org.springframework.batch.core.StepExecutionListener; public class CustomStepListener implements StepExecutionListener { @Override […]
In Spring batch, the Tasklet is an interface, which will be called to perform a single task only, like clean or set up resources before or after any step execution. In this example, we will show you how to use Tasklet to clean up the resource (folders) after a batch job is completed. P.S The […]
In this tutorial, we will show you how to read items from multiple resources (multiple csv files), and write the items into a single csv file. Tools and libraries used Maven 3 Eclipse 4.2 JDK 1.6 Spring Core 3.2.2.RELEASE Spring Batch 2.2.0.RELEASE P.S This example – 3 CSV files (reader) – combine into a single […]
A quick guide to show you how to run a Spring batch job with CommandLineJobRunner. 1. Spring Batch Job Example A simple job. resources/spring/batch/jobs/job-read-files.xml <?xml version="1.0" encoding="UTF-8"?> <beans … <import resource="../config/context.xml"/> <job id="readJob" xmlns="http://www.springframework.org/schema/batch"> <step id="step1"> <tasklet> <chunk reader="flatFileItemReader" writer="flatFileItemWriter" commit-interval="1" /> </tasklet> </step> </job> <!– … –> </beans> 2. Package Project Use Maven to […]
Read following Spring batch job, it reads data from “domain.csv“, and map it to a domain object. job-example.xml <bean class="org.springframework.batch.item.file.FlatFileItemReader" > <property name="resource" value="file:outputs/csv/domain.csv" /> <property name="lineMapper"> <bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper"> <property name="lineTokenizer"> <bean class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer"> <property name="names" value="id, domainName, lastModifiedDate" /> </bean> </property> <property name="fieldSetMapper"> <bean class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper"> <property name="prototypeBeanName" value="domain" /> </bean> </property> </bean> </property> </bean> <bean […]
Create a simple Spring batch job to write data to a csv file. The csv file name depends on the pass in job’s parameters, interprets by Spring EL . job-sample.xml <bean id="csvFileItemWriter" class="org.springframework.batch.item.file.FlatFileItemWriter"> <!– write to this csv file –> <property name="resource" value="file:outputs/csv/domain.done.#{jobParameters[‘pid’]}.csv" /> <property name="appendAllowed" value="false" /> <property name="lineAggregator"> <bean class="org.springframework.batch.item.file.transform.DelimitedLineAggregator"> <property name="delimiter" value="," […]
In this tutorial, we will show you how to configure a Spring Batch job to read XML file (JAXB2 library) into a csv file, and filter out the record before writing with ItemProcessor. Tools and libraries used Maven 3 Eclipse 4.2 JDK 1.6 Spring Core 3.2.2.RELEASE Spring Batch 2.2.0.RELEASE Spring OXM 3.2.2.RELEASE P.S This example […]
In this tutorial, we will show you how to configure a Spring Batch job to read data from an XML file (XStream library) into a no SQL database (MongoDB). In additional, create a unit test case to launch and test the batch jobs. Tools and libraries used Maven 3 Eclipse 4.2 JDK 1.6 Spring Core […]
Following the official Spring batch unit testing guide to create a standard unit test case. @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = { "classpath:spring/batch/jobs/job-abc.xml", "classpath:spring/batch/config/context.xml"}) public class AppTest { @Autowired private JobLauncherTestUtils jobLauncherTestUtils; @Test public void launchJob() throws Exception { JobExecution jobExecution = jobLauncherTestUtils.launchJob(); assertEquals(BatchStatus.COMPLETED, jobExecution.getStatus()); } } P.S spring-batch-test.jar is added to the classpath. Problem When launches above […]
In this tutorial, we will show you how to unit test Spring batch jobs with jUnit and TestNG frameworks. To unit test batch job, declares spring-batch-test.jar, @autowired the JobLauncherTestUtils, launch the job or step, and assert the execution status. 1. Unit Test Dependencies To unit test Spring batch, declares following dependencies : pom.xml <!– Spring […]
In this tutorial, we will show you how to configure a Spring Batch job to read data from a CSV file into a database. Tools and libraries used : Maven 3 Eclipse 4.2 JDK 1.6 Spring Core 3.2.2.RELEASE Spring Batch 2.2.0.RELEASE MySQL Java Driver 5.1.25 1. Java Project Create a Java Project with Maven $ […]
If jobRepository is created with MapJobRepositoryFactoryBean (metadata in memory), the Spring batch jobs are running successfully. spring-config.xml <bean id="jobRepository" class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean"> <property name="transactionManager" ref="transactionManager" /> </bean> Problem After changing the jobRepository to store metadata into database : spring-config.xml <bean id="jobRepository" class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="transactionManager" ref="transactionManager" /> <property name="databaseType" value="mysql" /> </bean> <bean id="jobLauncher" […]
Working with Spring Batch 2.2.0.RELEASE, and launches the job with Spring Scheduler. CustomJobLauncher.java package com.mkyong.batch; import org.springframework.batch.core.Job; import org.springframework.batch.core.JobExecution; import org.springframework.batch.core.JobParameters; import org.springframework.batch.core.launch.JobLauncher; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; @Component public class CustomJobLauncher { @Autowired JobLauncher jobLauncher; @Autowired Job job; public void run() { try { JobExecution execution = jobLauncher.run(job, new JobParameters()); System.out.println("Exit Status : " + […]
